Silicon Laboratories Confidential ♦ High-performance CMOS upgrades for opto couplers, isolation transformers and competing silicon isolators. ♦ World’s fastest, highest peak current and most integrated isolated gate drivers. 2.5 kV Isolators PDP TVs Power Supplies Motor Controls Lighting Ballasts RS232 to RS485 Industrial Data Acquisition ISOdrivers PDP TVs Power Supplies Motor Controls Lighting Ballasts AC Current Sensors Power Supplies Motor Controls Lighting Ballasts ♦ World’s best AC current sensor: higher accuracy, smaller, more integrated than all competing technologies!
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APAC-200706 DigPower Finalread.pudn.com/downloads145/sourcecode/others/631141/2008研讨会公开文件/NCD...Power Delivery System Block Diagram (typical of power supplies, UPS systems,
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Silicon Laboratories Confidential
♦ High-performance CMOS upgrades for opto couplers, isolation transformers and competing silicon isolators.
♦ World’s fastest, highest peak current and most integrated isolated gate drivers.
2.5 kVIsolators
PDP TVsPower SuppliesMotor Controls
Lighting BallastsRS232 to RS485
Industrial Data Acquisition
ISOdriversPDP TVs
Power SuppliesMotor Controls
Lighting Ballasts
AC CurrentSensorsPower SuppliesMotor Controls
Lighting Ballasts
♦ World’s best AC current sensor: higher accuracy, smaller, more integrated than all competing technologies!
Silicon Laboratories Confidential
Power Delivery System Block Diagram(typical of power supplies, UPS systems, ballast and motor controls)
VOUT
01
ISOLATED GATE DRIVE
SIGNAL
01
01
SECONDARYPOWER STAGES
PRIMARYPOWER STAGES
VIN
Si85xxCURRENTSENSORFamily
POWERCONTROLLER
NON-ISOLATED DRIVERS
LOAD
Si82xxIso-Driver
Family
Si84xxIsolatorFamily
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♦ Fastest throughput 50% faster than existing digital
isolators
♦ Highest integration From 1 to 4 channels per package
♦ Lowest power consumption Substantially lower than Optos
♦ Ease of use Single chip solution
♦ Economical Competitive volume pricing
♦ In Production NOW!
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Non-Isolated System
HV Path
♦ A high-voltage breakdown path exists through the control circuitry
Hig
h V
olta
ge
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♦ High voltage path is blocked because of high impedance between grounds
ISOLATOR
Very high impedance between grounds!
Hig
h V
olta
ge
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High throughput: DC to 150 Mbps
600 VDC (2.5KVRMS) isolation
Safety certified by UL, CSA, and VDE
Low 12mW/channel at 100 Mbps
High precision:
- 10 nS propagation time
- 2 ns max pulse width distortion
- 1 ns channel-channel matching
- 2 ns pulse width skew
High 25 KV/s transient immunity
Tri-state outputs with ENABLE control
Wide 2.375 to 5.5 V supply voltage
No start-up initialization required
<10 s Startup Time
Wide –40 to +125 °C operating temp range
Available in 1,2,3 or 4 channel package
Up to 150 MBPS throughput
Low 10 nS propagation delay
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2.5 V min
5 V max
Low
Voltage
Logic
5 V Logic
150MBPS max
150 MBPS max
Prop Delay <10 nS
Data D
irectionSi844x
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ADC
Analog Signal
3 V
AIN
HV DC Common
MCUU
p to ±600 V
Differential
HV DC Common
+
5 V
-
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- System communication ports (e.g. PoE systems)
- Test equipment
- Intermediate power busses- Telecom/datacom systems
- Isolated dc/dc (telecom/datacom)- Motor controls
- Industrial control systems- Lighting systems
- Test equipment (ground loop elimination)- Industrial control systems
♦ Example applications:- AC/DC and DC/DC power supplies
♦ Can be used anywhere else where working voltage is 120 V or less
♦ Example applications:
♦ Cannot directly isolate 240 V♦ Can be used everywhere in the system
240 V AC Line120 V AC Line
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Si8440/45
Si8441
Si8442
Si8430
Si8431
Si8420
Si8421
Si8410
4-Channel 3-Channel 2-Channel 1-Channel
16SO(W)
Package
3
3
3
4
4
4
Channels
1Si843x-A-IS
10Si843x-B-IS
150Si843x-C-IS
1Si844x-A-IS
10Si844x-B-IS
150Si844x-C-IS
Speed (MBPS)
Part Number
8SO
Package
1
1
1
2
2
2
Channels
1Si841x-A-IS
10Si841x-B-IS
150Si841x-C-IS
1Si842x-A-IS
10Si842x-B-IS
150Si842x-C-IS
Speed (MBPS)
Part Number
++
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♦ Generate an output signal proportional to measured current
♦ Used in power system of all kinds Power supplies, motor controls, lighting controls Provide critical information for system control and safety
♦ Big market: 120M+ unit SAM in 2007!
POWER CONTROLLER
CURRENTSENSOR
POWER STAGE
CURRENT
10A
0A
SIGNAL
2V
0V
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♦ Available in 5 A, 10 A and 20 A full scale♦ Layout bypass techniques extend full-scale range beyond 50 A
Scaleable Range
♦ Single-chip, 4x4x1 mm QFN packageSmall Size
♦ Same quality and reliability as standard CMOS integrated circuits High Quality/Reliability
♦ Accurate to ±5% of measurement—reduces or eliminates calibration♦ Tighter unit-to-unit matching
High Accuracy
♦ Only 1 mΩ series R and 2nH series L—low power loss, less ringingLow Loss
♦ On-board signal processor eliminates external circuitry: No external components other than a VDD bypass capacitor No external RC filter Eliminates the need for leading-edge blanking circuitry Si851x eliminates second current transformer circuit in full bridge applications High accuracy operation reduces or eliminates calibration
♦ Price-competitive with CT, MR, Hall effect sensors
Low Installed Cost
Si85xx Feature/BenefitDesirable Current Sensor Attributes
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Clean current signal!
PC Board Trace
Cur
rent
Flo
w
2$ -
Current waveform is recovered and conditioned
Current through slug induces a voltage on chip inductor
♦ 2 Wire Ping-Pong mode:♦ MODE input must = 1 ♦ R3 and R4 must be = 0
R1, R2Push-Pull
♦ R2 must be = 0. ♦ R3 must also = 0 if Si851x is used
R12-Switch Forward
♦ 4-wire Ping-Pong mode ♦ MODE input must = 0
R1, R2, R3, R4Full Bridge
♦ R2 must be = 0. ♦ R3 must also = 0 if Si851x is used
R1Half Bridge
♦ R2 must be = 0. ♦ R3 must also = 0 if Si851x is used
R1Buck or Boost
COMMENTRESET INPUTS USED
TOPOLOGY
Example RESET connections for common switch mode topologies:
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Actual current*
Si85xx output
* Differential oscilloscope probe across current sense resistor
♦ Noise and leading-edge spikes are filtered out by Si85xx integrating action♦ No output filter or leading-edge blanking required
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♦ Low series inductance and on-board signal processing reduces ringing commonly found in current transformer circuits
CT Output
Si85xx output
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♦ Typical BOM is a minimum* of 10 components 2 current sense transformers 2 diodes and/or capacitors 4 resistors
CONTROLCIRCUIT A
B
* Does not include CT reset circuit
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♦ Si851x ping-pong output: routes current signal from each side of the bridge to individual output pins >80% BOM component count reduction Higher accuracy, smaller size, lower cost, smaller BOM
CONTROLCIRCUIT A
B
VIN+
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Customer’s system
)7,2/$ *
Si85xx solder-in boardEnables customers to install the Si85xx in their system immediately and without laying-out a new board
1 2 3 4 5c m
:
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♦ ISOdriver = isolator + driver in one package
♦ Displaces discrete or integrated opto + driver, or gate driver transformers in power supplies, motor control and lighting control applications
Characteristics vary with temperature and age Slow propagation time
CONTROLLER
OUTH
High Side/Low Side Driver
GND
OUTL
VDD
VIN
VDD2
CBSTRAP
Opto Coupler
Opto Coupler
Isolation Barrier
Load
VDD1
Ground 1
Ground 2
Ground 2
Ground 2
Ground 2
VDD2
Ground 2
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♦ BOM: 1 Si823x ISOdriver, 3 capacitors, 1 diode (~200 mm2)♦ Fast propagation time, stable over temperature and age♦ Simplifies layout
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VIN
A
B
VOUT
Simple Buck Converter
SHOOT-THROUGH CURRENT
High-side/low-side ISOdrivers protect switching transistors from failures caused by high-side/low-side timing overlap
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♦ Si823x allows dead time adjustment for optimum efficiency Adequate time for Q1 to turn off without shoot-through Minimize conduction time through Q2 body diode Programmed dead time with a single resistor to ground
* Q2 RDSON = 5mΩ
A
B
Dead Time
Dead time Cannot = 0!!Must allow time for Q1 to completely turn off before Q2 turns ON!!
Simple Buck Converter
Q2 power loss when ON = IOUT
2 x RDSON
= 0.5W
Q2 Power loss when OFF = VT x IOUT
= 7W!!!
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Wide application range600 VDC isolation (in/out and out/out)
More timing margin and/or faster control loop responseFast prop times
Glitch-free start-up/shutdownInput & output UVLO
Facilitates local ON/OFF control/protectionDISABLE input
♦ Key application is control driver in plasma displays♦ Overlap protection and programmable dead-time control♦ Input and output UVLO: no glitches on start-up/shut down♦ Better timing specs—improved timing margins, less unit-to-unit variation♦ Also available in dual low-side version (Si8232—no overlap protection)
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Can be used in sustain and energy recovery circuits
New design
HS/LS or dual LS operation
20
5
0.5 A
113 mm2
1
Si8220
Can fine-tune timing without modifying control circuits
Dead time control
Higher production yield, fewer warranty repairs
~15Channel-to-channel matching (nS)
Higher production yield, fewer warranty repairs
~80Unit-to-unit matching
Can drive lower cost transistors (or a greater number of transistors)
0.35 AOutput drive (A pk)
Size advantage122 mm2Installed size (mm2)
Cost, integration advantages7Number of components
Silicon Labs BenefitDiscrete Opto + Driver
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♦ 4 A peak drive current Available with 2-wire or single PWM control inputs Overlap protection and programmable dead time Input and output UVLO: no glitches on start-up/shut down
♦ Also available in dual low-side version (Si8235) ♦ Key applications
Power supplies, UPS systems, motor control, lighting systems
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♦ Two die One GaAS and one Bi-polar
♦ Split lead frame♦ Clear epoxy sheet placement♦ Two molding compounds
Inner is IR Tx friendly
♦ Estimated assembly cost at $0.40 - $0.50
Clear Epoxy
Interface
Device
LED
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Pin-for-pin upgrade for Avago HCPL-31xx, Toshiba HCPL-31xx and other opto drivers
14x faster prop delays
30x lower pulse width distortion
6x faster rise and fall times
20x better unit-to-unit matching
Stable operation over temp and age
Higher reliability
Higher efficiency/lower input current
Better common mode transient immunity
More flexible input circuitry
Delay time independent of input drive
30 CONFIDENTIAL
SMPS Topology
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~2KV
250V
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♦ 2.5 KV isolators serves all 120 V line applications♦ 2.5 KV isolators serve many 240 V line applications
Examples: Isolated dc/dc converters for telecom/datacom Industrial data acquisition systems Isolated communication interfaces Sensor interface applications (ground loop elimination)
2.5 KV isolator coverage at 120 VAC 2.5 KV isolator coverage at 240 VAC