-
新竹市科學園區展業一路9號 7樓之 1
SILICON TOUCH TECHNOLOGY INC. 9-7F-1, Prosperity Road I, Science
Based Industrial Park,
Hsin-Chu, Taiwan 300, R.O.C. Tel:886-3-5645656
Fax:886-3-5645626
DM631B
Version : PRE.001 Issue Date : 2008/09/12 File Name :
SP-DM631B-PRE.001.doc Total Pages : 31
16-CHANNEL CONSTANT CURRENT LED DRIVER
WITH 12-bit PROGRAMMABLE PWM OUTPUTS
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 1
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Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
DM631B 16-CHANNEL CONSTANT CURRENT LED DRIVER
WITH 12-bit PROGRAMMABLE PWM OUTPUTS
General Description DM631B is a 16-channel constant current sink
LED driver. Each channel has independent
12-bits (4096 steps) grayscale PWM control current outputs. It
incorporates shift registers, data
latches, constant current circuitry with current value set by an
external resistor, and built-in LED
open detection circuit to detect error status. It combines the
selections with rising / falling edge
serial out, auto-reload/one-shot PWM output, internal/external
grayscale clock source. It is
specifically designed for LED display or lighting
applications.
Features Constant-current outputs: 5mA to 60mA adjustable by one
external resistor
12-bit linear PWM control current outputs for each channel
Maximum output voltage: 17V
Maximum clock frequency: 25MHz
Auto-Reload / One-Shot Mode selection.
Serial out clock edge selection – Rising / Falling edge
selection
Internal / External PWM clock mode selection
Built-in real-time open detection
Package and pin assignment compatible to conventional LED
drivers
(DM134/5/6, DM13C)
Power supply voltage: 3.3V to 5V
Schmitt Trigger input
Output channel delay
Applications Indoor/Outdoor LED Video Display
LED Variable Message Signs (VMS) System
LED Decorative Lighting
Package Types DIP24B, SOP24B, SSOP24, TSSOP24E (with exposed
pad)
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點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 2
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DM631B
Block Diagram
DAI
DCK
LAT
DAO
GCK
REXT
OUT 0 OUT 15
12-bitCounter
12
12
12
12
12
12
InternalOscillator
VCCGND
12-bit Shift Register(1)
12-bit Shift Register(15)
12-bit Latch Register(0)
12-bit Latch Register(1)
12-bit Latch Register(15)
12-bit Shift Register(0)
12-bit PWM Generator(0)
12-bit PWM Generator(1)
12-bit PWM Generator(15)
OUT 1
LED Open Detector(0)
LED Open Detector(1)
LED Open Detector(15)
Constant Current Driver(0)
Constant Current Driver(1)
Constant Current Driver(15)
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 3
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Unauthorized reproduction, duplication, use or disclosure of
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DM631B
Pin Connection
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
OUT0OUT1OUT2OUT3
VCCREXTDAOGCK
GND
DCKLAT
OUT 15OUT 14OUT 13OUT 12
DAI
SOP24
TSSOP24E
( top view )
9
10
11
12
16
15
14
13
OUT4OUT5OUT6OUT7
OUT 11OUT 10OUT 9OUT 8
SOP24B
DIP24B
Pin Description PIN No. PIN
NAMEFUNCTION
SOP24B/SSOP24/TSSOP24E: 1 TSSOP24E: exposed pad
GND Ground terminal.
SOP24B/SSOP24/TSSOP24E: 2 DAI Serial data input terminal.
SOP24B/SSOP24/TSSOP24E: 3 DCK Synchronous clock input terminal
for serial data transfer. Data is sampled at the rising edge of
DCK.
SOP24B/SSOP24/TSSOP24E: 4 LAT
Input terminal of data strobe: ‘H’ means data on shift register
goes through latch
(level trigger), all outputs off and counter
resetimmediately
‘L’ means data is latched.
SOP24B/SSOP24/TSSOP24E: 5~20 OUT0~15 Sink constant-current
outputs (open-drain).
SOP24B/SSOP24/TSSOP24E: 21 GCK Gray Scale Clock (GCK) : Input
terminal for PWM operation.
SOP24B/SSOP24/TSSOP24E: 22 DAO Serial data output terminal. Data
shift out at the rising edge of DCK in REM∗1 (default), or data
shift out at the falling edge of DCK in FEM∗2.
SOP24B/SSOP24/TSSOP24E: 23 REXT External resistors connected
between REXT and GND for output current value setting.
SOP24B/SSOP24/TSSOP24E: 24 VCC Supply voltage terminal.
∗1 Rising Edge Mode ∗2 Falling Edge Mode
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 4
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Unauthorized reproduction, duplication, use or disclosure of
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DM631B
Equivalent Circuit of Inputs and Outputs 1. DCK, DAI, LAT , GCK
terminals
2. DAO terminals
PCB Layout Consideration To connect an external resistor to REXT
pin and ground can determine the maximum output
current. If there is any disturbance occurred to REXT pin, the
constant current output may be unstable or has noise happened.
Since REXT (pin23), DAO (pin22), and GCK (pin21) are next to each
other, the most possible interference is caused by DAO or GCK
signal. Accordingly, it is recommended that adding some shielding
area within the above pins in PCB layout, or laying the signal line
of above pins on different PCB layer will prevent the noise
problems effectively.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 5
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Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Maximum Ratings (Ta=25°C, Tj(max) = 150°C) CHARACTERISTIC SYMBOL
RATING UNIT
Supply Voltage VCC -0.3 ~ 7.0 V Input Voltage VIN -0.3 ~ VCC+0.3
V Output Current IOUT 70 mA Output Voltage VOUT -0.3 ~ 17 V Input
Clock Frequency FDCK 25 MHz GND Terminal Current IGND 1120 mA
4.17 ( TSSOP24E exposed pad) 2.19 ( SOP24B) 1.87 (DIP24B)
Power Dissipation (4 layer PCB, at Ta=25℃)
PD
1.79 ( SSOP24 )
W
30 ( TSSOP24E exposed pad) 57 (SOP24B) 67 (DIP24B)
Thermal Resistance (4 layer PCB, at Ta=25℃)
Rth(j-a)
70 (SSOP24 )
°C/W
Operating Temperature Top -40 ~ 85 °C Storage Temperature Tstg
-55 ~ 150 °C
Recommended Operating Condition
CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX. UNITSupply
Voltage VCC ⎯ 3.3 5.0 5.5 V
Output Voltage VOUT Driver On*1 1.0 ⎯ 0.5VCC
Output Voltage VOUT Driver Off*2 ⎯ ⎯ 17 V
IO OUTn 5 ⎯ 60 IOH VOH = VCC – 0.4 V ⎯ ⎯ +1.5 Output Current IOL
VOL = 0.2 V ⎯ ⎯ -1.5
mA
VIH 0.8VCC ⎯ VCC Input Voltage
VIL VCC = 3.3 V ~ 5.5V
0.0 ⎯ 0.2VCCV
Input Clock Frequency FDCK Single Chip Operation ⎯ ⎯ 25
Input PWM Frequency FGCK 3.3V~5.5V ⎯ ⎯ 25 MHz
LAT Pulse Width tw LAT 15 ⎯ ⎯ DCK Pulse Width tw DCK 15 ⎯ ⎯
Set-up Time for DAI tsetup(D) 10 ⎯ ⎯ Hold Time for DAI thold(D) 10
⎯ ⎯ Set-up Time for LAT tsetup(L) 10 ⎯ ⎯ Hold Time for LAT
thold(L)
VCC = 5.0V
360*3 ⎯ ⎯
ns
*1 Notice that the power dissipation is limited to its package
and ambient temperature. *2 The driver output voltage including any
overshoot stress has to be compliant with the maximum voltage
(17V). *3 Due to open detection operation and output channel delay
consideration.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 6
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this document will be deemed as infringement.
DM631B
Electrical Characteristics (VCC = 5.0 V, Ta = 25°C unless
otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX.
UNIT
Output Leakage Current IOL VOH = 17 V ⎯ ⎯ ±1.0 uA
VOL IOL = 1.25 mA ⎯ ⎯ 0.4 Output Voltage (S-OUT)
VOH IOH= 1.4 mA VCC-0.2 ⎯ ⎯ V
Output Current Skew
(Channel-to-Channel)*1 IOL1 ⎯ ⎯ ±3 %
Output Current Skew
(Chip-to-Chip)*2 IOL2
VOUT = 1.0 V Rrext = 2.2 KΩ
TBD TBD TBD mA
Output Voltage Regulation % / VOUT Rrext = 2.2 KΩ
VOUT = 1 V ~ 3 V ⎯ ±0.1 ±0.5
Supply Voltage Regulation % / VCC Rrext = 2.2 KΩ ⎯ ±1 ±4
% / V
LED Open Detection Threshold V(od) all outputs turn on ⎯ 0.2 ⎯
V
IDD(off)
power on all pins are open
unless VCC and GND (internal GCK mode
⎯ 5.5 ⎯
IDD(off)
power on all pins are open
unless VCC and GND (external GCK mode)
⎯ 5.0 ⎯
IDD(on) input signal is static
Rrext = 12.4 KΩ all outputs turn off
⎯ 6.0 ⎯
IDD(on) input signal is static
Rrext = 2.2 KΩ all outputs turn off
⎯ 8.5 ⎯
Supply Current*3
IDD(on) input signal is static
Rrext = 570 Ω all outputs turn off
⎯ 17.5 ⎯
mA
*1 Channel-to-channel skew is defined as the ratio between (any
Iout – average Iout) and average Iout, where average
Iout = (Imax + Imin) / 2. *2 Chip-to-Chip skew is defined as the
range into which any output current of any IC falls. *3 IO
excluded.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 7
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DM631B
Electrical Characteristics (VCC = 3.3 V, Ta = 25°C unless
otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX.
UNIT
Output Leakage Current IOL VOH = 17 V -1.0 ⎯ +1.0 uA
VOL IOL = 1.25 mA ⎯ ⎯ 0.4 Output Voltage (S-OUT)
VOH IOH= 1.4 mA VCC-0.2 ⎯ ⎯ V
Output Current Skew
(Channel-to-Channel)*1 IOL1 ⎯ ⎯ ±3 %
Output Current Skew
(Chip-to-Chip)*2 IOL2
VOUT = 1.0 V Rrext = 2.2 KΩ
TBD TBD TBD mA
Output Voltage Regulation % / VOUT Rrext = 2.2 KΩ
VOUT = 1 V ~ 3 V ⎯ ±0.1 ±0.5
Supply Voltage Regulation % / VCC Rrext = 2.2 KΩ ⎯ ±1 ±4
% / V
LED Open Detection Threshold V(od) all outputs turn on ⎯ 0.2 ⎯
V
IDD(off)
power on all pins are open
unless VCC and GND (internal GCK mode)
⎯ 4.5 ⎯
IDD(off)
power on all pins are open
unless VCC and GND (external GCK mode)
⎯ 4.2 ⎯
IDD(on) input signal is static
Rrext = 12.4 KΩ all outputs turn off
⎯ 5.5 ⎯
IDD(on) input signal is static
Rrext = 2.2 KΩ all outputs turn off
⎯ 7.0 ⎯
Supply Current*3
IDD(on) input signal is static
Rrext = 570 Ω all outputs turn off
⎯ 15.0 ⎯
mA
*1 Channel-to-channel skew is defined as the ratio between (any
Iout – average Iout) and average Iout, where average
Iout = (Imax + Imin) / 2. *2 Chip-to-Chip skew is defined as the
range into which any output current of any IC falls. *3 IO
excluded.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 8
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DM631B
Switching Characteristics (VCC = 5.0V, Ta = 25°C unless
otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX.
UNIT
GCK-to-OUT ⎯ 45.7 ⎯
DCK(rising edge)-to-DAO ⎯ 36 ⎯ Propagation Delay
(‘L’ to ‘H’) DCK(falling edge)-to-DAO
tpLH
⎯ 16 ⎯
GCK-to-OUT ⎯ 23.8 ⎯
DCK(rising edge)-to-DAO ⎯ 28 ⎯ Propagation Delay
(‘H’ to ‘L’) DCK(falling edge)-to-DAO
tpHL
⎯ 14 ⎯
Output Current Rise Time tor ⎯ 18 ⎯
Output Current Fall Time tof ⎯ 7.0 ⎯
Output Delay Time Unit Td
VIH = VCC
VIL = GND
Rrext = 2.2 KΩ
VL = 5.0 V
CL = 13 pF
⎯ 20 ⎯
ns
Switching Characteristics (VCC = 3.3V, Ta = 25°C unless
otherwise noted) CHARACTERISTIC SYMBOL CONDITION MIN. TYP. MAX.
UNIT
GCK-to-OUT ⎯ 48.8 ⎯
DCK(rising edge)-to-DAO ⎯ 23 ⎯ 0Propagation Delay
(‘L’ to ‘H’) DCK(falling edge)-to-DAO
tpLH
⎯ 23 ⎯
GCK-to-OUT ⎯ 29.6 ⎯
DCK(rising edge)-to-DAO ⎯ 21 ⎯ Propagation Delay
(‘H’ to ‘L’) DCK(falling edge)-to-DAO
tpHL
⎯ 20 ⎯
Output Current Rise Time tor ⎯ 20 ⎯
Output Current Fall Time tof ⎯ 8.3 ⎯
Output Delay Time Unit Td
VIH = VCC
VIL = GND
Rrext = 2.2 KΩ
VL = 3.3 V
CL = 13 pF
⎯ 30 ⎯
ns
OUTn
DAO
REXT
VCC
CL
VL
Switching Characteristics Test Circuit
A
Rrext
DAI
LAT
DCK
GCKCLCLCLCL
GND
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 9
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DM631B
Constant-Current Output Constant-current value (Iout*1) of each
output channel is set by an external resistor connected
between the REXT pin and GND. The current scale ranging can be
adjusted from 5mA to 60mA by varying the resistor value. The
reference voltage of REXT terminal (Vrext) is approximately 1.23V.
The output current value is calculated by the following
equation:
Iout(mA) 5 10 20 30 40 50 60
M 37.11 36.29 37.55 39.03 40.36 40.4 41.28
Output current as a function of Rext value
0
10
20
30
40
50
60
70
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
Rext
Iout
(mA)
Output Current as a function of Output Voltage
0
10
20
30
40
50
60
70
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
Vout(V)
Iout
(A)
In order to obtain a good performance of constant-current
output, a suitable output voltage is necessary. Users can get
related information about the minimum output voltage above.
*1 Iout is typical current value setting under 100% PWM duty
cycle .
Iout (mA) ~Vrext (V)
Rrext (KΩ)× M
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 10
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DM631B
Serial Data Interface The serial-in data (DAI) data will be
clocked into 16 × 12 bit shift registers synchronized on
the rising edge of the clock (DCK). The data will be transferred
into the 16 × 12 bit latch registers
when the strobe signal ( LAT ) is kept at high level (level
trigger); Otherwise, the data will be held. The latch pulse should
be sent after the falling edge of the last clock within one frame
data. The serial-out data (DAO) will be shifted out on
synchronization of the clock (DCK). Input Data clock-in
sequence
The sequence of the grayscale PWM luminous data of a driver
showed as following diagram. The input data sequence of input data
is from the MSB of OUT15 (D15 [11:0]) to the LSB of OUT0 (D0
[11:0]) by time passing.
D15 [10] D15[9] D15[8]D15 [11] D15 [7] D15 [6] D15[5] D15[2]
D15[1] D15[0]D15[4] D15[3]
LSB
OUT 15
MSB
shift in first
OUT 14
OUT 0
Active width per frame(%) =D[11]×211+D[10]×210+D[9]
×29+D[8]×28+D[7]×2
7+D[6]×26+D[5]×25+D[4]×24+D[3]×23+D[2]×22+D[1]×21+D[0]×20
4096
D14 [10] D14 [9] D14[8]D14 [11] D14[7] D14 [6] D14[5] D14[2]
D14[1] D14 [0]D14[4] D14[3]
LSBMSB
D0 [10] D0 [9] D0[8]D0[11] D0 [7] D0[6] D0 [5] D0[2] D0 [1] D0
[0]D0 [4] D0 [3]
LSBMSB
Serial-out Data clock-out sequence The data serial out from DAO
include latched grayscale data and the LSB of each output data
covered by detection message (ERR) after LAT pulse be active. The
serial out sequence of the data is from the MSB of OUT15 (D15
[11:0]) to the LSB of OUT0 (D0 [11:0]) by time passing.
D15 [10] D15[9] D15[8]D15 [11] D15 [7] D15 [6] D15[5] D15[2]
D15[1] ERR [15]D15[4] D15[3]
LSB
OUT 15
MSB
shift out first
OUT 14
OUT 0
D14 [10] D14 [9] D14[8]D14 [11] D14[7] D14 [6] D14[5] D14[2]
D14[1] ERR[14 ]D14[4] D14[3]
LSBMSB
D0 [10] D0 [9] D0[8]D0[11] D0 [7] D0[6] D0 [5] D0[2] D0 [1]
ERR[0]D0 [4] D0 [3]
LSBMSB
*ERR[11], ERR[10],… ,ERR[0] are Error Message of LED Open
Detection. `1'is normal, and `0'is abnormal.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 11
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DM631B
Rising/Falling Edge Mode selection The luminous data serial out
from DAO by data clock (DCK) as following waveform. In rising edge
mode (REM), the data serial out by the rising edge of DCK.
D[191]DAO
DCK
LAT
191
E [1 ]
1 2
D[190] D[189 ] 91
192
ERR[0]
192
Rising Edge Mode (REM) DAO serial out by DCK rising edge.
In falling edge mode (FEM), the data serial out by the falling
edge of DCK.
DAO
DCK
LAT
1911 2 192192
Falling Edge Mode (FEM) : DAO serial out by DCK falling
edge.
D[191] E [1 ]D[190] 91ERR[0]
*D[191], D[190],…D[0], E[191] are clock-in data in Shift data
register of driver
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 12
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Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
The default mode is the Rising-Edge Mode (REM*1) after power-on.
Users could do mode select between REM and FEM*2 by following
timing sequence. The option 1 shows two rising edge of latch pulses
( LAT ) when the data-input clock (DCK) kept at high level then
sending one rising edge of DCK pulses when LAT kept at high level.
Then we can receive serial-out data from the data-output signal
(DAO) at falling edge of DCK after the falling edge of LAT . The
option 2 shows three rising edge of LAT when DCK kept at high level
then sending two rising edge of DCK, while LAT kept high level at
the same time. After the falling edge of LAT , we receive
serial-out data from DAO at rising edge of DCK (REM). Notice that
when internal RESET at low level, all the shift registers in DM631B
will be cleared (Kept at Low level).
DCK
LAT
Option 2 : Signals Combination to set up Rising-Edge Mode
(REM)
RESET (internal)
t
1 2 3
1 2
GCK
DCK
LAT
Option 1 : Signals Combination to set up Falling-Edge Mode
(FEM)
RESET (internal)
t
1 2
1
GCK XX X X
Auto-Reload/One-Shot Mode selection The Auto-Reload mode (ARM)
in DM631B means outputs can repeat the grayscale PWM cycle over and
over. It can decrease the data amount greatly compare to non-PWM
function driver operated in grayscale PWM application.
LAT
GCK
OUT0
( internal or external ) 4096 GCK
Counter reset
(current)
on
off
high
low
1
0
Auto-Reload Mode (ARM).
Frame Data B
4096 GCK
Frame Data B
The One-Shot Mode in DM631B means each output shows one
grayscale PWM cycle following one latch pulse. The grayscale PWM
cycle starts with the falling edge of LAT signal. The first GCK
pulse after LAT increases the grayscale counter by one and switches
on all outputs with grayscale value. It makes driver synchronous
control easily.
*1 REM switch to FEM timing diagram, please refer to page 16. *2
FEM switch to REM timing diagram, please refer to page 17.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 13
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
on
off
high
low
4096 GCK
1
0
Frame Data B
One-Shot Mode (OSM)
LAT
GCK
OUT0
( internal or external )
(current)
Counter reset
The default mode is the Auto-Reload Mode (ARM*1) after power-on.
Users could do mode
select between ARM and One-Shot Mode (OSM*2 ) by following
timing sequence. The gray scale clock signal (GCK) should keep at
low during this mode selection process. The option 1 shows four
rising edges of latch pulse ( LAT ) when the data-input clock (DCK)
kept at high level then three rising edges of DCK when LAT kept at
high level. Then DM631B starts OSM after the falling edge of LAT .
The option 2 shows five rising edges of LAT when DCK kept at high
level then sending four rising edges of DCK signal, while LAT
signal kept high level . After falling edge of LAT , DM631B switch
to ARM . Notice that when internal RESET at low level, all the
shift registers in DM631B will be cleared (Kept at Low level) .
DCK
LAT
RESET (internal)
Option 1 : Signals Combination to set up One-Shot Mode (OSM)
t
1 2 3
1 2 3
4
GCK
DCK
LAT
RESET (internal)
Option 2 : Signals Combination to set up Auto-Reload Mode
(ARM)
t
1 2 3
1 2 3
4
GCK
5
4
X X X X
*1 ARM switch to OSM timing diagram, please refer to page 18. *2
OSM switch to ARM timing diagram, please refer to page 19.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 14
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Internal/External Clock Mode selection Grayscale luminous of
each channel comes from comparisons of grayscale PWM luminous data
and grayscale counter value. In internal-clock mode, DM631B
provides build-in oscillator for counter operation. In
external-clock mode, the clock source of counter is from control
system through GCK pin. The default mode is the Internal-Clock
Mode(ICM*1) after power-on. Users could do mode select between ICM
and External-Clock Mode (ECM∗2 ) by following timing sequence. The
option 1 shows four rising edges of latch pulses ( LAT ) when the
data clock (DCK) kept at high level and the grayscale clock (GCK)
kept at low then sending three rising edges of DCK when LAT and GCK
both kept at high level. Then we can input external gray scale
clock from GCK pin to operate grayscale PWM function after the
falling edge of LAT . The option 2 shows five rising edges of LAT
when DCK kept at high level and GCK at low level then sending four
rising edges of DCK , while LAT and GCK kept at high level . After
the falling edge of LAT , grayscale PWM function operates by
internal gray scale clock generator. Notice that when internal
RESET at low level, all the shift registers in DM631B will be
cleared (Kept at Low level).
DCK
LAT
RESET (internal)
Option 1 : Signals Combination to set up External-Clock Mode
(ECM)
t
1 2 3
1 2 3
4
GCK
DCK
LAT
RESET (internal)
Option 2 : Signals Combination to set up Internal-Clock Mode
(ICM)
t
1 2 3
1 2 3
4
GCK
5
4
XXXX
LED Open Detection
DM631B provides a real time monitor of LED open detection
function without extra components or circuit design. It will be
identified as a LED open failure when the output is turned on but
the output voltage is below 0.2V. The test result of each channel
will write to its correspondent shift register which is in LSB
position (ERR[11], ERR[10], …., ERR[0]) while strobe signal is
active. User can refer to timing diagram on page11. Detecting
report could be retrieved from serial-out (DAO) data. If the system
reads ‘1’ back, that indicates LED is in normal status. But if ‘0’
was retrieved then LED open failure has occurred. In order to make
sure LED open detection function is in well operating condition,
thold(L)*3 should larger then 360n sec(typ) due to the build-in
delay between outputs. And it is recommended that all the luminance
data wrote to ‘1’ during detection.
*1 ICM switch to ECM timing diagram, please refer to page 20. ∗
2 ECM switch to ICM timing diagram, please refer to page 21 * 3
Hold time between LAT and DCK, please refer to page 15.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 15
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Timing Diagram 1. DCK-DAI, DAO
DCK
DAI
DAO50%
50% 50%
50% 50% 50%
twDCK twDCK
tsetup(D) thold(D)
tpLH tpHL
50%
50%
2. DCK-LAT
DCK
LAT
50%
50% 50%
tsetup(L)
twLAT
50%
t hold(L)
3. GCK-OUT0
GCK
OUT050%
50% 50%
tpLH tpHL
50%
ON
OFF
4. Output Delay Time Unit (N=0, 4, 8, 12)
OUTN
OUTN+150%
50%
td
OUTN+250%
td
OUTN+350%
td
ON
OFF
ON
OFF
ON
OFF
ON
OFF
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 16
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Timing Diagram (Rising-Edge Mode switch to Falling-Edge Mode)
D
on'
care
t
*2ER
R[0
] is
the
erro
r mes
sage
of
LED
ope
n de
tect
ion.
*3LA
T is
leve
l trig
ger,
not e
dge
trigg
er.
J[1
]
192
DAI
DAO
*1
DC
K
LAT
*3
12
192
GC
K
OU
Tn*4
(cur
rent
)
J[0
]L[
191]
L[19
0]
J[1
91]
Fram
eD
ata
JFr
ame
Dat
aI
high
low
high
low 1 01 0
L[1
91]
J[2
]
I[1]
Cou
nter
re
set
*4Io
ut tu
rn o
ff w
hen
LAT
is h
igh
leve
l ,an
d tu
rn o
n at
the
first
GC
K ris
ing
edge
whe
n LA
T is
low
leve
l.
40
96 G
CK
J[1
90]
12
34
L[1
90]
L[1
89L
[188
]]
M[1
91]
M[1
90]
M[1
89]
M[1
88]
*1R
EM, A
RM
, IC
M is
con
figer
ed b
y de
faul
t. Th
ey c
an s
witc
h to
FEM
, OSM
, EC
M a
ccor
ding
ly.
All r
egis
ters
in D
M63
1B w
ith b
e re
set w
hen
any
switc
h pr
ocee
s oc
cur.
Fram
eD
ata
L
(inte
rnal
)
GC
K
(ext
erna
l)
1 0 on off
high
low
Don
'ca
ret
L[0
]D
on'
care
t
ER
R[0
]*2
FEM
switc
h pe
riod
Gra
ysca
le d
ata
cloc
k-in
per
iod
Gra
ysca
le d
ata
cloc
k-in
per
iod
*5 J
[191
],J[1
90],J
[2],J
[1],J
[0],I
[1],I
[1],L
[191
].L[1
90],…
L[0
],M[1
91],M
[190
],… a
re s
eria
l dat
a fo
r DM
631B
.
Fram
eD
ata
L
*5
191
190
For e
xam
ple,
if th
e re
fresh
rate
in d
ispl
ay s
yste
m is
hig
her t
han
60H
z, th
e in
put G
CK
frequ
ency
mus
t be
high
er th
an 2
46kH
z.
=R
efre
sh R
ate
(Hz)
Inpu
t GC
K Fr
eque
ncy
(Hz)
Tota
l PW
M re
solu
tion
(212
)
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 17
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Timing Diagram (Falling-Edge Mode switch to Rising-Edge Mode)
D
on'
care
tD
on'
care
t
*2ER
R[0
] is
the
erro
r mes
sage
of
LED
ope
n de
tect
ion.
*3LA
T is
leve
l trig
ger,
not e
dge
trigg
er.
M[1
]
191
192
DAI
DAO
*1
DC
K
LAT
*3
12
192
GC
K
OU
Tn*4
(cur
rent
)
M[0
]O
[191
]O
[190
]O
[0]
M[1
91]
M[1
90]
Fram
e D
ata
MFr
ame
Dat
aL
on off
high
low
high
low 1 01 0
O[1
91]
190
M[2
]
L[1
]
Cou
nter
re
set
*4Io
ut tu
rn o
ff w
hen
LAT
is h
igh
leve
l ,an
d tu
rn o
n at
the
first
GC
K ris
ing
edge
whe
n LA
T is
low
leve
l.
40
96 G
CK
M[1
89]
12
34
O[1
90]
O[1
89O
[188
]]
P[1
91]
P[1
90]
P[1
89]
P[1
88]
*1R
EM, A
RM
, IC
M is
con
figer
ed b
y de
faul
t. Th
ey c
an s
witc
h to
FEM
, OSM
, EC
M a
ccor
ding
ly.
All r
egis
ters
in D
M63
1B w
ith b
e re
set w
hen
any
switc
h pr
ocee
s oc
cur.
Fram
eD
ata
O
(inte
rnal
)
GC
K(e
xter
nal)
1 0 high
low
ER
R[0
]*2
Don
'ca
ret
REM
switc
h pe
riod
Gra
ysca
le d
ata
cloc
k-in
per
iod
Gra
ysca
le d
ata
cloc
k-in
per
iod
*5 M
[191
],M[1
90],…
M[0
],L[2
],L[1
],O[1
91].O
[190
],… O
[0],P
[191
],P[1
90],…
are
ser
ial d
ata
for D
M63
1B.
L[2
]*5
Fram
eD
ata
O
For e
xam
ple,
if th
e re
fresh
rate
in d
ispl
ay s
yste
m is
hig
her t
han
60H
z, th
e in
put G
CK
frequ
ency
mus
t be
high
er th
an 2
46kH
z.
=R
efre
sh R
ate
(Hz)
Inpu
t GC
K Fr
eque
ncy
(Hz)
Tota
l PW
M re
solu
tion
(212
)
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 18
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Timing Diagram (Auto-Reload Mode switch to One-Shot Mode) D
on'
care
D[0
]
on off
high
low
high
low 1 01 0
D[1
91]
DAI
DA
O*1
DC
K
LAT*
3
OU
Tn*4
12
192
F[1
91]
F[1
90]
F[0
]
F[19
]1D
[1]
89D
[1]
88
4096
GC
K
[191
]G
[190
]G
[189
]G
[1]
90F
[1]
89F
[188
F]
*2ER
R[0
] is
the
erro
r mes
sage
of
LED
ope
n de
tect
ion.
*3LA
T is
leve
l trig
ger,
not e
dge
trigg
er.
*4Io
ut tu
rn o
ff w
hen
LAT
is h
igh
leve
l ,an
d tu
rn o
n at
the
first
GC
K ris
ing
edge
whe
n LA
T is
low
leve
l.
*1R
EM, A
RM
, IC
M is
con
figer
ed b
y de
faul
t. Th
ey c
an s
witc
h to
FEM
, OSM
, EC
M a
ccor
ding
ly.
All r
egis
ters
in D
M63
1B w
ith b
e re
set w
hen
any
switc
h pr
ocee
s oc
cur.
D[1
]90
192
GC
K(e
xter
nal)
1 0
Fram
e D
ata
F
For e
xam
ple,
if th
e re
fresh
rate
in d
ispl
ay s
yste
m is
hig
her t
han
60H
z, th
e in
put G
CK
frequ
ency
mus
t be
high
er th
an 2
56kH
z.
=R
efre
sh R
ate
(Hz)
Inpu
t GC
K Fr
eque
ncy
(Hz)
Tota
l PW
M re
solu
tion
(212
)
4096
GC
K
Cou
nter
re
set
(cur
rent
)
high
low
Cou
nter
re
set
Fram
e D
ata
CFr
ame
Dat
a D
GC
K(in
tern
al)
t
12
3
Don
' c
are
t
*5 D
[191
],D[1
90],…
D[0
],F[1
91],F
[190
],...F
[0],G
[191
],G[1
90],…
are
ser
ial d
ata
for D
M63
1B.
OSM
switc
h pe
riod
Gra
ysca
le d
ata
cloc
k-in
per
iod
Gra
ysca
le d
ata
cloc
k-in
per
iod
Don
' c
are
t
Fram
e D
ata
D
*5
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 19
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Timing Diagram (One-Shot Mode switch to Auto-Reload Mode)
*2ER
R[0
] is
the
erro
r mes
sage
of
LED
ope
n de
tect
ion.
*3LA
T is
leve
l trig
ger,
not e
dge
trigg
er.
ERR
[0]*2
G[1
]
191
192
DAI
DAO
*1
DC
K
LAT
*3
t
12
192
GCK
OU
Tn*4
(cur
rent
)
G[0
]I[
191]
I[19
0]I[
0]
G[1
91]
Fram
eD
ata
GFr
ame
Dat
aF
on off
high
low
high
low 1 01 0
I[19
1]F
[1]
*4Io
ut tu
rn o
ff w
hen
LAT
is h
igh
leve
l ,an
d tu
rn o
n at
the
first
GC
K ris
ing
edge
whe
n LA
T is
low
leve
l.
40
96 G
CK
G[1
87]
12
I[19
0]
J[19
2]J[
191]
*1R
EM, A
RM
, IC
M is
con
figer
ed b
y de
faul
t. Th
ey c
an s
witc
h to
FEM
, OSM
, EC
M a
ccor
ding
ly.
All r
egis
ters
in D
M63
1B w
ith b
e re
set w
hen
any
switc
h pr
ocee
s oc
cur.
G[1
88]
[190
]G
(iner
nal)
G[1
89]
40
96 G
CK
GC
K(e
xter
nal)
1 0
Fram
e D
ata
I
high
low
Don
'ca
reD
on'
care
tD
on'
care
t
AR
M sw
itch
perio
dG
rays
cale
dat
a cl
ock-
in p
erio
dG
rays
cale
dat
a cl
ock-
in p
erio
d
*5 F
[1],G
[191
],G[1
90]..
.G[1
],G[0
],I[1
91],I
[190
],...I
[0],J
[191
],J[1
90],…
are
ser
ial d
ata
for D
M63
1B.
Fram
e D
ata
I
*5
For e
xam
ple,
if th
e re
fresh
rate
in d
ispl
ay s
yste
m is
hig
her t
han
60H
z, th
e in
put G
CK
frequ
ency
mus
t be
high
er th
an 2
46kH
z.
=R
efre
sh R
ate
(Hz)
Inpu
t GC
K Fr
eque
ncy
(Hz)
Tota
l PW
M re
solu
tion
(212
)
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 20
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Timing Diagram (Internal-Clock Mode switch to External-Clock
Mode)
*2ER
R[0
] is
the
erro
r mes
sage
of
LED
ope
n de
tect
ion.
*3LA
T is
leve
l trig
ger,
not e
dge
trigg
er.
P[1
]
191
192
DAI
DAO
*1
DC
K
LAT
*3
12
192
GC
K
OU
Tn*4
(cur
rent
)
P[0
]Q
[191
]Q
[190
]Q
[0]
Fram
e D
ata
PFr
ame
Dat
aO
high
low
high
low 1 01 0
Q[1
91]
190
P[2
]
1 0
*4Io
ut tu
rn o
ff w
hen
LAT
is h
igh
leve
l ,an
d tu
rn o
n at
the
first
GC
K ris
ing
edge
whe
n LA
T is
low
leve
l.
40
96 G
CK
P[1
88]
12
Q[1
90]
R[1
91]
R[1
90]
*1R
EM, A
RM
, IC
M is
con
figer
ed b
y de
faul
t. Th
ey c
an s
witc
h to
FEM
, OSM
, EC
M a
ccor
ding
ly.
All r
egis
ters
in D
M63
1B w
ith b
e re
set w
hen
any
switc
h pr
ocee
s oc
cur.
Fram
eD
ataQ
P[1
89]
(ext
erna
l)
GC
K(in
tern
al)
high
low
high
low
Cou
nter
re
set
P[1
91]
O[1
]P
[190
]
Don
'ca
ret
ER
R[0
]*2
Don
'ca
ret
Don
'ca
ret
ECM
switc
h pe
riod
Gra
ysca
le d
ata
cloc
k-in
per
iod
Gra
ysca
le d
ata
cloc
k-in
per
iod
*5 P
[191
],P[1
90],…
P[0
],O[1
],Q[1
91].Q
[190
],… Q
[0],R
[191
],R[1
90],…
are
ser
ial d
ata
for D
M63
1B.
*5
For e
xam
ple,
if th
e re
fresh
rate
in d
ispl
ay s
yste
m is
hig
her t
han
60H
z, th
e in
put G
CK
frequ
ency
mus
t be
high
er th
an 2
46kH
z.
=R
efre
sh R
ate
(Hz)
Inpu
t GC
K Fr
eque
ncy
(Hz)
Tota
l PW
M re
solu
tion
(212
)
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 21
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Timing Diagram (External-Clock Mode switch to Internal-Clock
Mode)
*2ER
R[0
] is
the
erro
r mes
sage
of
LED
ope
n de
tect
ion.
*3LA
T is
leve
l trig
ger,
not e
dge
trigg
er.
R[1
]
191
192
DAI
DAO
*1
DC
K
LAT
*3
12
192
GC
K
OU
Tn*4
(cur
rent
)
R[0
]S
[191
]S
[190
]S
[0]
Fram
e D
ata
RFr
ame
Dat
aQ
high
low
high
low 1 01 0
S[1
91]
190
R[2
]
Cou
nter
re
set
*4Io
ut tu
rn o
ff w
hen
LAT
is h
igh
leve
l ,an
d tu
rn o
n at
the
first
GC
K ris
ing
edge
whe
n LA
T is
low
leve
l.
409
6 G
CK
R[1
87]
12
S[1
90]
T[1
91]
T[1
90]
*1R
EM, A
RM
, IC
M is
con
figer
ed b
y de
faul
t. Th
ey c
an s
witc
h to
FEM
, OSM
, EC
M a
ccor
ding
ly.
All r
egis
ters
in D
M63
1B w
ith b
e re
set w
hen
any
switc
h pr
ocee
s oc
cur.
Fram
e D
ata
S
R[1
88]
[190
]R
(ext
erna
l)
R[1
89]
on off
GCK
(inte
rnal
)
1 0 high
low
R[1
91]
Q[1
]ER
R[0
]*2
Don
'ca
ret
Don
'ca
ret
Don
'ca
ret
ICM
switc
h pe
riod
Gra
ysca
le d
ata
cloc
k-in
per
iod
Gra
ysca
le d
ata
cloc
k-in
per
iod
*5 Q
[1],R
[191
],R[1
90],…
R[0
],S[1
91].S
[190
],… S
[0],T
[191
],T[1
90],…
are
ser
ial d
ata
for D
M63
1B.
*5
For e
xam
ple,
if th
e re
fresh
rate
in d
ispl
ay s
yste
m is
hig
her t
han
60H
z, th
e in
put G
CK
frequ
ency
mus
t be
high
er th
an 2
46kH
z.
=R
efre
sh R
ate
(Hz)
Inpu
t GC
K Fr
eque
ncy
(Hz)
Tota
l PW
M re
solu
tion
(212
)
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 22
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Output Modulation Technique
DM631B provides a new LED drive technique of output modulation.
It improves traditional Pulse Width Modulation (PWM) by 2-section
modulation. The main benefits of 2-section modulation are to drive
LED with an equivalent higher refresh rate (up to 6.1MHz in DM631B
when FGCK = 25MHz) and change bit to next bit smoothly. The
relationships between PWM and 2-section modulation in time domain
can be refer to the diagram (not to scale) below:
0000 XXXXXXXX
0001
0110
0111
1000
1001
1110
1111
Bit[7:0] (PWM)Bit[11:0]
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
t
4096 clocks
MSB LSB
MSB
MSB
MSB
MSB
MSB
MSB
MSB
XXXXXXXXLSB
XXXXXXXXLSB
XXXXXXXXLSB
XXXXXXXXLSB
XXXXXXXXLSB
XXXXXXXXLSB
XXXXXXXXLSB
Ultra High Resolution Current Outputs
DM631B could provide 12-bit 2-section PWM control current
outputs for each channel. There are two advantages for system
design. One is DM631B has sufficient bit resolution (4096 steps),
not only LED color information but additional data such as global
brightness, dot correction, and gamma correction can be represented
by the proper algorithms. The other is to reduce a lot of clock and
data rate compared to conventional ON-OFF type LED drivers.
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 23
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Global Brightness Control DM631B has no built-in global
brightness control feature. In order to obtain a lower
resolution
of global brightness control effect, two methods could be
utilized. Here show different ways to adjust the Rrext value or
voltage drop across the external resistor. Please see the reference
circuit below:
Output to Output Delay
DM631B has build-in output to output delay with a special
arrangement. This arrangement help chip avoid noise cause by large
current during channels switching. The arrangement details are
shown as following table.
Channel 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Delay units 0 1 2 3 0 1 2 3 0 1 2 3 0 1 2 3
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 24
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Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Power Dissipation
The power dissipation of a semiconductor chip is limited to its
package and ambient temperature, in which the device requires the
maximum output current calculated for given operating conditions.
The maximum allowable power consumption can be calculated by the
following equation:
Pd(max)(Watt) =Tj(junction temperature)(max)(°C)– Ta(ambient
temperature)(°C)
Rth(junction-to-air thermal resistance)(°C/Watt)
The relationship between power dissipation and operating
temperature can be refer to the figure below:
PD - Ta curve
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0 20 40 60 80 100 120 140 160
Ambient Temperature Ta ( ℃ )
Pow
er D
issi
pati
on
Pd(
W)
The power consumption of IC can be determined by the following
equation and should be less than the maximum allowable power
dissipation:
SSOP24
TSSOP24E
Tj(max)=150°C
Rth(TSSOP24E=30°C/Watt
Rth(SOP24B)=57°C/Watt
Rth(DIP24B)=67°C/Watt
Rth(SSOP24)=70°C/Watt
SOP24B
DIP24B
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 25
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Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Typical Application
DM631B DM631B
DM631B DM631B
DM631B
DM631B
DM631B
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 26
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Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
D
24 13
121
E1 E E2
b1
b
e
L A1A
2
ASEATING PLANE
Package Outline Dimension DM631B-DIPB
DIMENSIONS IN INCH DIMENSIONS IN MM
SYMBOLS MIN. MAX. MIN. MAX.
A - 0.210 - 5.334
A1 0.015 - 0.381 -
A2 0.125 0.135 3.175 3.429
b 0.040 1.016
b1 0.018 0.457
D 0.880 0.920 22.352 23.368
E 0.300BSC 7.620BSC
E1 0.245 0.255 6.223 6.477
E2 0.335 0.375- 8.509 9.525
e 0.070 1.778
L 0.115 0.150 2.921 3.810
Θ 0° 15° 0° 15°
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 27
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
D
24 13
121E
b e 0.004
A
E1
C
DETAIL A
A1
A2 A
LL1
SEATING PLANE
GAUGE PLANE
Package Outline Dimension DM631B-SSOP
DIMENSIONS IN INCH DIMENSIONS IN MM
SYMBOLS MIN. MAX. MIN. MAX.
A 0.053 0.069 1.346 1.753
A1 0.004 0.010 0.102 0.254
A2 - 0.059 - 1.499
b 0.008 0.012 0.203 0.305
C 0.007 0.010 0.178 0.254
D 0.337 0.344 8.560 8.738
E 0.228 0.244 5.791 6.198
E1 0.150 0.157 3.810 3.988
e 0.025 BSC. 0.635 BSC
L 0.016 0.050 0.406 1.270
L1 0.041 BSC 1.041 BSC
Θ 0° 8° 0° 8°
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 28
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
Package Outline Dimension DM631B-SOPB
DIMENSIONS IN INCH DIMENSIONS IN MM
SYMBOLS MIN. MAX. MIN. MAX.
A - 0.075 - 1.900
A1 0.002 0.008 0.050 0.200
A2 0.051 0.067 1.300 1.700
b 0.012 0.020 0.300 0.500
c 0.004 0.010 0.100 0.250
D 0.504 0.520 12.800 13.200
E 0.303 0.327 7.700 8.300
e 0.0394 BSC 1.000 BSC
E1 0.228 0.244 5.800 6.200
L 0.010 0.026 0.250 0.650
θ 0° 10° 0° 10°
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 29
未經授權而逕予重製、複製、使用或公開本文件,行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
S
L
L10.
25m
m
GAUGE PLANESEATING PLANE
D1
E2
24 13
121
be
EE1
D
0.05 A1
A2 A
Package Outline Dimension DM631B-TSSOPE (exposed pad)
DIMENSIONS IN INCH DIMENSIONS IN MM
SYMBOLS MIN. MAX. MIN. MAX.
A - 0.047 - 1.20
A1 0.000 0.006 0.00 0.15
A2 0.031 0.041 0.80 1.05
b 0.007 0.012 0.19 0.30
D 0.303 0.311 7.70 7.90
E1 0.169 0.177 4.30 4.50
E 0.252 BSC 6.400 BSC
e 0.026 BSC 0.650 BSC
L1 0.039 REF 1.000 REF.
L 0.018 0.030 0.45 0.75
S 0.008 - 0.20 -
Θ 0° 8° 0° 8°
E2 0.0898 0.1122 2.280 2.850
D1 0.146 1.819 3.700 4.620
-
點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC. 新竹市科學園區展業一路 9號 7樓之
1
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
Tel:886-3-5645656 Fax:886-3-5645626
16-channel 12-bit PWM Constant Current LED Driver
Version:PRE.001 Preliminary Page 30
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Unauthorized reproduction, duplication, use or disclosure of
this document will be deemed as infringement.
DM631B
The products listed herein are designed for ordinary electronic
applications, such as electrical appliances, audio-visual
equipment, communications devices and so on. Hence, it is advisable
that the devices should not be used in medical instruments,
surgical implants, aerospace machinery, nuclear power control
systems, disaster/crime-prevention equipment and the like. Misusing
those products may directly or indirectly endanger human life, or
cause injury and property loss. Silicon Touch Technology, Inc. will
not take any responsibilities regarding the misusage of the
products mentioned above. Anyone who purchases any products
described herein with the above-mentioned intention or with such
misused applications should accept full responsibility and
indemnify. Silicon Touch Technology, Inc. and its distributors and
all their officers and employees shall defend jointly and severally
against any and all claims and litigation and all damages, cost and
expenses associated with such intention and manipulation.