Whole systematic over-voltage protection circuit design

Shenzhen Sunlord Electronics Co., Ltd.

Whole systematic overWhole systematic over--voltage voltage

protection circuit designprotection circuit design(LCD(LCD--TV/STB/TV/STB/Security/TelecomSecurity/Telecom))

2012.3



About About SunlordSunlord

GuiZhou Plant

ShenZhen Plant

Professional in passive components

Multilayer Chip Inductor/Bead Chip Varistor/NTC Thermistor Chip Wire Wound Inductor/ Common Mode Choke Coil Chip LTCC


ContentContent

1. Whole Systematic Over-voltage Protection Circuit DesignOver-voltage Classification and DamageSystematic Over-voltage Protection Circuit DesignSelection Principle of Chip Varistor

2. Performance Comparison of Over-voltage Protection ComponentsChip Varistor vs TVS, GDT, PESD

3. Sunlord’s Chip VaristorProducts Features Part NumberApplicationProducts ReliabilityNew Products

4. Over-voltage protection program ApplicationsLCD-TVSTBComputerCommunication / Industrial / Security


OverOver--voltage Classification and Damagevoltage Classification and Damage

Over-voltage type Mechanism Duration Pulse

wavepropagation

mode

Lightning Induced over-

voltage

The space around lightning has a strong alternating electromagnetic waves spreading outward divergently. In this case transient voltage will occur in cables or circuit.

uS8/20 uS Pulse wave

Electromagnetic induction,

Conduction

Switching over-voltage

Energy storage element such as inductors, capacitors will release the energy when equipments stop or start, witch will case the transient voltage.

uS -mS

2mS or 10/1000

uSPulse wave

Conduction

ESDESD case transient voltage and the radiation of electrostatic field in circuit.

nS0.7~1nsPulse wave

Electromagnetic induction,

Conduction


IEC61000IEC61000--44--2 Standard2 Standard

Severity Level

AirDischarge

DirectDischarge

1 2 KV 2 KV

2 4 KV 4 KV

3 8 KV 6 KV

4 15 KV 8 KV

X Special Special

Currently, IC can withstand 2kV ESD transient voltage at least.

Severity Level

ESD Transient Voltage

ESD Transient Current

1 2 KV 7.5A

2 4 KV 15A

3 8 KV 30A

4 15 KV 45A


OverOver--voltage Protection Componentsvoltage Protection Components

Over-voltage type Over-voltage Protection Components

Lightning Induced over-

voltageVaristor, GDT

Switching over-voltage Varistor, TVS

ESD Varistor, TVS, PESD


All kinds of surge energy transmitted in ways of Radiation or Conduction. Good Over-voltage protection depends on the protect device and circuit design structure.

Over-voltage comes randomly, we must use protection device to absorb some surge energy, in order to avoid damage to the circuit functionality.

Building the over-voltage suppression and energy absorption for each function module in order to achieve effectively the purpose of over-voltage protection.

Systematic OverSystematic Over--voltage Protection Circuit Designvoltage Protection Circuit Design

Ⅰ Ⅱ Ⅲ Ⅳ

The solution is mainly used for Induced & switched over-voltage suppressing and energy absorption. Such as LCD-TV, STB, Computer, LED Lighting, Smart Meter, Industrial control and security system etc.


OverOver--voltage Amplitude and the Energy Changevoltage Amplitude and the Energy Change

Location Source Change Protection Components

Ⅰ(AC-DC)

Lightning induced voltage from the power line or signal line into the

Amplitude and energy focused onⅠpart, but energy also attenuate from Ⅰ to Ⅱ/Ⅲ, and therefore it must be absorbed.

Varistor, GDT

Ⅱ / Ⅲ(DC-DC)

Self-generated over-voltage in line and lightning induced voltage after attenuation

Low amplitude, high energy, large harm, and must be absorbed

Varistor, TVS

Ⅳ(Signal End) ESD from ports

High amplitude, low energy, large harm, and must be absorbed or transmitted

Varistor, TVS、 PESD


Selection Principle of Chip VaristorSelection Principle of Chip Varistor

System rated voltage

Over-voltage/ESDWithstand Voltage

Signal/Power

GND

ICvaristor

Vdc

Clamping Voltage


Selection Principle of Leaded /Chip VaristorSelection Principle of Leaded /Chip Varistor(Surge current/Induced over-voltage)

1. AC-DC ModuleSingle-phase supply: L/N～PE

(1) VWAC ≥1.4 Vn, VwAC: max. working voltage of varistor;Vn: system rated voltage.

(2) Peak current of varistor (Ip) should exceed the impulse current occurred in the circuit,generally, Ip ≥2500A(TV/STB), Ip ≥400A(LED Lighting/Charger).

(3)Clamping voltage should be under the voltage that device to be protected can stand for.

Recommend: VPS05KD300BS / VPS07KD300BS /SDVL10080KA301TF(LED Lighting/Charger)VPS10KD350BS/ VPS14KD350BS(TV/STB/Refrigerator power board)


Three-phase alternating-current supply: L/N～PE(1) VWAC ≥1.732Vn, VWAC : max. working voltage of varistor;Vn: system

rated voltage.

(2) Peak current of varistor (Ip) should exceed the impulse current occurred in the circuit, generally, Ip≥4500A （Smart Meter), Ip≥1200A(LED Lighting/Charger).

(3) Clamping voltage should be under the voltage that device to be protected can stand for.

Recommend: VPS10KD420BS/SDV10080KA421TF (LED lighting in public)VPS20KD420BS (Smart Meter/Appliance power control panel)

Selection Principle of Leaded /Chip VaristorSelection Principle of Leaded /Chip Varistor(Surge current/Induced over-voltage)


2. DC-DC Module

(1) VWAC ≥1.2 Vn, VWDC : max. working voltage of varistor;Vn: system rated voltage.

(2) Pk current of varistor (Ip) should exceed the impulse current occurred in the circuit, generally, Ip ≥150A.

(3) Clamping voltage should be under the voltage that device to be protected can stand for.

Recommend：SDVL3216/3225/4532/5650

Selection Principle of Chip VaristorSelection Principle of Chip Varistor(Surge current/Induced over-voltage)


Selection Principle of Chip VaristorSelection Principle of Chip Varistor(Surge current/Induced over-voltage)

3. DC secondary protection circuit On the part of the DC line, must require a very low varistor clamping voltage, to protect the IC, the circuit can be used as follows:

Z1

Z2

Z3

Z1: Chip varistorZ2: Resistance or InductorZ3: Chip varisor (preferred),TVS( very low clamping voltage)

Through Z1/Z3 to progressively absorb the surge energy, making a very small surge energy by IC, IC enough to bear;

Through Z2 to divert the surge voltage, Z1 to divert surge current, making a very small surge by the Z3, significantly reducing clampingvoltage of Z3, IC enough to bear.

IC


4. Signal End The influence factors of over-voltage on the IC：

R:Load Resistance

Rv: Transient Resistance of VaristorIC Rv

I RR

I RVI RV

Factor SolutionTransient voltage across IC

Varistor can suppress transient voltage down to 100V, far lower than 2KV which IC can withstand

The pulse current going through IC

Adjust PCB design to reduce the loop area of pulse current by IC and the loop inducted currentChoose a proper varistor with higher capacitance which has lower transient resistanceConnect a resistance or ferrite bead in series with IC to increase load resistance

Selection Principle of Chip VaristorSelection Principle of Chip Varistor(ESD)


If R (load resistance) is very small, we can connect ferrite bead or resistance in series with IC, without causing effect to signal transmission ratio to improve the performance of varistor.

IC RvI RR

I RVI RVI RR

I RVI RV

Z

The cause of inappropriate over-voltage protection (including ESD)：(1) Clamping voltage of varistor is higher than the voltage that IC can stand for.(2) The loop pulse current exceed the current which IC can stand for.

Thus, the transient resistance of Rv should be less than R/5(15KV ESD) ,orwe can connect bead, resistance or capacitance in series with IC to increas e the loop resistance.

Selection Principle of Chip Varistor(ESD)

R:Load Resistance

Rv: Transient Resistance of Varistor


VDC:Working DC VoltageMax DC Voltage of Varistor must exceed the signal line voltage (Vn), VDC≥ Vn.

Cp:CapacitanceFor high speed lines, we should choose varistor with low capacitance, vice versa.

Resistance MatchThe matching relations of Rv(transient resistance of varistor) and R (the equivalent

resistance of protected IC and circuit)( R ≥ 2Ω): Rv ≤ 1/5 R

when the resistance of protected component is smaller, we should choose varistor with higher capacitance without causing effect to signal transmission ratio.

Space: we should choose proper dimension varistor according the PCB space.

Layout:Varistor should keep close to the transient voltage and ESD source.

Ground Design: Good ground contact design, as large ground area as possible.

Selection Principle of Chip VaristorSelection Principle of Chip Varistor


ContentContent






Varistor Equivalent Circuit

Rb: resistance of PN junction

Cb:capacitance of PN junction

Rb Cb

TVS TVS Equivalent CircuitVcVc=(=(Rg+RbRg+Rb)* )* IcIc VcVc= = RbRb * * IcIc

Rg:Linear resistance Rb:Nonlinear resistor

Rg

Rb Cb

Rg:Resistance of Crystal Grain

Rb:Resistance of Crystal Boundary

Cb:Capacitance of Crystal Boundary

Equivalent Circuit Comparison of Chip Equivalent Circuit Comparison of Chip VaristorVaristor and TVSand TVS


VcVc==RbRb* * IcIc

Rb CbRb Cb

VcVc==RbRb* * IcIc

Rg:Gas gap resistance

Cb:Clearance Capacitance

Rg:Resin clearance resistance

Cb:Clearance Capacitance

Equivalent Circuit Comparison of PESD and GDTEquivalent Circuit Comparison of PESD and GDT

GDT Equivalent Circuit PESD Equivalent Circuit

Rb:Nonlinear resistorRb:Nonlinear resistor


Part Part NumberNumber

VVWDCWDC V1mAV1mA IcIc VcVc maxmax IpIp (A)(A) EtEt CpCp SizeSize

（（VV））（（VV））（（AA））（（VV））（（AA））（（mJmJ））（（pfpf））（（mmmm））

SDV1005ESDV1005E 5R5C300N5R5C300N

PTFPTF5.55.5 10~1410~14 11 1818 1212 0.0050.005 3030 1.0*0.5*1.0*0.5*0.50.5

PESD5V0PESD5V0 S1BLS1BL 55 5.5~9.55.5~9.5 11 1010 1212 // 3535 1.0*0.6*0.51.0*0.6*0.5

SDV1005ASDV1005A 140C151N140C151N

PTFPTF1414 16~2216~22 11 3030 2020 0.050.05 150150 1.0*0.5*1.0*0.5*0.50.5

SD12SD12 1212 13.3 min13.3 min 11 1919 1515 // 150150 2.5*1.3*1.12.5*1.3*1.1

Performance Comparison of Performance Comparison of VaristorVaristor VS. TVSVS. TVS

It can be seen that It can be seen that varistorvaristor has a similar has a similar VcVc to TVS diode. to TVS diode. VarisorVarisor can can absorb part of energy, therefore, it has larger Et and better peabsorb part of energy, therefore, it has larger Et and better performance rformance in induced/switched overin induced/switched over--voltage protection than TVS diodevoltage protection than TVS diode. .


VaristorVaristor vs. TVS Vvs. TVS V--I GraphI Graph

(1) As for Varistor and TVS (comparable characteristics), V-I graphs are almost the same;

(2) Peak pulse current: Varistor can reach 500A，while TVS is 200A;

(3) As for the same scale characteristics, Varistor only takes up 32.5% PCB real estate of that of TVS.


EMC effect

VaristorVaristor vs. TVS vs. GDT vs. PESDvs. TVS vs. GDT vs. PESD

Varistor

Varistor

TVS / GDT / PESD

Circuit

/ DeviceTVS/GDT/PESD Signal/Power Circuit

/ Device

Both TVS and PESD had no capability of absorbing ESD energy which may occur in the circuit and cause EMI.

Varistor can absorb part of energy, therefore it is good for EMC capability of device.


VaristorVaristor vs. TVSvs. TVS

Varistor TVS

Part Number

Size （mm）

Pulse Power Dissipation

P (W)

Ip (A)8/20μS

Patr Number

Size （mm）

Pulse Power Dissipation

P (W)

Ip (A)8/20μS

SDVL3216 3.2*1.6*1.05 500~780 250~300 SMAJ 5.0*2.5*

1.9 400 3.0~195

SDVL3225 3.2*2.5*1.7 600~1600 300~400 SMBJ 5.4*3.6*

2.3 600 4.5~293

SDVL4532 4.5*3.2*2.5 700~3000 500~800 SMCJ 8.0*6.0*

2.3 1500 24.7~733

SDVL5650 5.7*5.0*2.5 1600~8500 900~1200 SMDJ

8.0*6.0*2.3 3000 92~1250

Note: Working voltage 5.5 ~ 100Vdc, working voltage of the two type products can exchange. But size of varistor is much smaller than TVS.The properties of Varistor are higher than TVS.


VaristorVaristor vs. TVSvs. TVSMax pulse current change along with working Voltage

0

50

100

150

200

250

300

350

5.5 9 14 26 38 48 56 65 85 100

Working Voltage Vdc（V）

Ip（

8/20μ

S）

（A）

SMAJ SDVL

Pulse power change along with working Voltage

200

300

400

500

600

700

800

900

5.5 9 14 26 38 48 56 65 85 100


P（

10/1000μ

S）

（W）

SMAJ SDVL

Along with the working voltage increase, the pulse current through TVS drop dramatically.

Along with the working voltage increase, the pulse current through SDVL almost unchanged.

Varistor can be used in lines with high voltage and pulse current amplitude for suppression over-voltage and surge absorption.



Along with the working voltage increase, varistor absorption ability of pulse current rise dramatically.

TVS has no ability to absorb pulse current, only transmitting energy.

Pulse power change along with working voltage

0.6

0.8

1

1.2

1.4

1.6

1.8

2

2.2

2.4

5.5 9 14 26 38 48 56 65 85 100


Et（

10/1000μ

S）

（J）

SDVL3225


Temperature Characteristic

Curve of pulse current drop whit temperature

Chip varistor is good hot conductor, has very good heat capacity, and remain stable temperature characteristics of pulse current in as much as 85℃.

Because of TVS material characteristics, temperature characteristic of pulse current begin to decay from 25℃.



ESD life

Different products varistor voltage change ratio VS. ESD(8KV) times

Both Varistor and TVS can stand thousands of times ESD pulse

-50

-40

-30

-20

-10

00 20 100 300 500 700 900 1100

ESDtimes

Cha

nge

Rat

io o

fch

arac

ters（

％）

SD-12 SDV1005E5R5C180NPSDV1005E090C400NP

Products Reliability Products Reliability


VaristorVaristor vs. TVS vs. GDT vs. PESDvs. TVS vs. GDT vs. PESDItemItem Chip Chip VaristorVaristor TVSTVS GDTGDT PESDPESD

Protection Mechanism

Tunnelling(Heat dissipation and

energy transfer)

Zener and avalanche breakdown

（energy transfer）

Avalanche breakdown


Zener and avalanche breakdown


Response Time ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★

Forward voltage Lower than dozens of Lower than dozens of voltvolt

Lower than dozens Lower than dozens of voltof volt

Higher than several Higher than several hundred volthundred volt

Higher than several Higher than several hundred volthundred volt

Min. capacitanceMin. capacitance 0.5pf0.5pf 0.5pf0.5pf 0.1pf0.1pf 0.05pf0.05pf

Clamping voltageClamping voltage ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★

DimensionDimension ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★

ESD Failure ESD Failure VoltageVoltage ★★ ★★ ★★ ★★ ★★ ★★ // ★★ ★★ ★★

ESD lifeESD life ★★ ★★ ★★ ★★ ★★ ★★ // ★★ ★★ ★★

Energy CapabilityEnergy Capability ★★ ★★ ★★ ★★ ★★ ★★

Temperature Temperature CharacteristicsCharacteristics ★★ ★★ ★★ ★★ ★★ ★★

EMC EffectEMC Effect ★★ ★★ ★★ ★★ ★★ ★★

Flame Flame retardancyretardancy ★★ ★★ ★★ ★★ ★★ ★★ ★★ ★★Transient voltage Transient voltage Protection typeProtection type InducedInduced, Switched, ESD, Switched, ESD Switched, ESDSwitched, ESD InducedInduced ESDESD


ContentContent






Fast response time: < 0.5nS Wide range of product variants(1005/1608/2012/3216/3225/4532/5650/8063/10080)Wide Capacitance range :0.15pf ~ 10000 pfHigh flow capacity, energy toleranceLow leakage currentLow clamping voltageBidirectional V/I characteristic

SunlordSunlord’’ss Chip Chip VaristorVaristor

Features


SDV 1608 A 180 C151 F P T① ② ③ ④ ⑤ ⑥ ⑦ ⑧

② Dimensions (L×W) (mm)

1005 [0402] 1.0×0.51608 [0603] 1.6×0.82012 [0805] 2.0×1.253216 [1206] 3.2×1.6

① Type

SDV chip varistor

④ Max. Continuous Working Voltage

Example Nominal Value5R5 5.5V180 18V

⑧

PackingB BulkT Tape & Reel

⑤ Capacitance @1MHz

Example Nominal ValueC151 150pFC152 1500pF

⑥ Tolerance of Capacitance

N ±30%Y +100/-50%G Maximum

③

Feature Code

A For Over-voltageE For ESDH For High SpeedS For Special

⑦ Terminal Code

P Sn platingS Pt/Pd/Ag

Part Number


SDVA 2082 VA 180 C100 F P T① ② ③ ④ ⑤ ⑥ ⑦ ⑧


2080 [0805] 2.0×1.252082 [0805] 2.0×1.25

① Type

SDVA chip varitor array

④ Max. Continuous

Working Voltage


⑧

PackingB BulkT Tape & Reel

⑤ Capacitance @1MHz

Example Nominal ValueC100 10pF

⑥ Tolerance of Capacitance

N ±30%Y +100/-50%G Maximum

③

Feature Code

RA/RB/RC For EMI/ESD

VA For ESD

⑦ Terminal Code

P Sn plating

S Pt/Pd/Ag

Part Number


PESD 1005 H 140 CR15 G P T ① ② ③ ④ ⑤ ⑥ ⑦ ⑧

② Dimensions (L×W) (mm)1005 [0402] 1.0×0.51608 [0603] 1.6×0.8

① Type

PESD

④ Max.Continuous

Working Voltage


⑤ Capacitance @1MHzExample Nominal Value

CR15 0.15pF ⑥ Tolerance of Capacitance

G Maximum

③

Feature Code

H For High Speed

⑦ Terminal Code

P Ni,Sn plating

⑧

Packing

T Tape & Reel

Part Number


SDVL 4532 S D 180 P T① ② ③ ④ ⑤ ⑥ ⑦


3216 [1206] 3.2×1.63225 [1210] 3.2×2.54532 [1812] 4.5×3.25650 [2220] 5.7×5.0

① Type

SDVL Chip Varistor

④ Type of Working Voltage

A AC Working Voltage

D DC Working Voltage⑤Max. Continuous Working Voltage

Example Nominal Value

180 18V

⑥ Terminal Code

P Ni, Sn Plating

③Tolerance of Varistor Voltage

k ±10%S Special

⑦ Packing

T Tape & Reel

Part Number


VP S 05 K D 220 B S ① ② ③

④

⑤

⑥

⑦ ⑧

② Shape

S SquareR Round

① Type

VP Leaded Zinc Oxide Varistor

④

Tolerance of Varistor Voltage K ±10%S Special

⑦

PackageB Bulk PackageA Ammo Package R Reel Package

⑤ Feature CodeExample Nominal Value

D StandardH High energy

③ Diameter or side ofCeramic Body （mm）

05 507 710 1014 1420 20

⑧

Lead wire

S Straight cut lead Y Straight Y kink lead C Straight cut crimped leadI Straight cut inner lead

⑥

Max allowable AC Voltage (rms)Example Nominal Value

220 220V300 300V

Part Number


Part Number

Max. Working Voltage Capacitor

@1MHz

Max. Clamping Voltage(8/20us)

Peak Current (8/20us)

Energy 10/1000μs

SDV0603 5.5～26V 0.5～80pF 18～58V 1～10A 0.003~0.02J

SDV1005 5.5～26V 0.5～360pF 18～58V 1～20A 0.003~0.05J

SDV1608 5.5～30V 0.5～820pF 18～65V 1～30A 0.003~0.1J

SDV2012 5.5～30V 18～2000pF 18～65V 3～150A 0.005~0.4J

SDVA 5.5～26V 1～70pF 18～200V 1～10A 0.003~0.05J

These products are used for ESD protection of signal ports.

Bigger size product has larger surge current capability.

VaristorVaristor Electrical Performance RangeElectrical Performance Range


PESD Electrical Performance RangePESD Electrical Performance Range

Part Number

Max. DC Working Voltage

Trigger Voltage

Max. Clamping Voltage

Cut-off Frequency Typical

Capacitance

Test Condition DC ESD ESD @-0.3dB @1Vrms , 1MHz

Units Volts Volts Volts GHz pFSymbol VwDC VT

*1 VC*2 f0 C

PESD1005H140CR15GPT 14 200~400 36 4.5 0.05~0.15PESD1608H140CR15GPT 14 200~400 36 4.5 0.05~0.15

These products are used for ESD protection of USB3.0 and HDMI1.4 ports.


These products are used for suppressing over-voltage and absorbing energy to protect DC-DC module.


Part Number Max. Working Voltage

Varistor Voltage


Rated Single Pulse Transient

Test Condition<20μA @1mA

DC 8/20μs Energy 10/1000μs

Peak Current 8/20μsDC AC RMS

Units Volts Volts Volts Volts Amps Joules Amps

Symbol VWDC VWAC VB VC Ic ET IP

SDVL3216SD180PT 18 12.7 22.0~28.0 40 2.5 0.5 200

SDVL3216SD480PT 48 34.1 54.0~67.0 100 2.5 0.5 200

SDVL3225SD180PT 18 12.7 22.0~28.0 40 2.5 1.5 400

SDVL3225SD480PT 48 34.1 54.0~67.0 100 2.5 2.0 250

SDVL4532SD180PT 18 12.7 22.0~28.0 40 5.0 2.3 800

SDVL4532SD480PT 48 34.1 54.0~67.0 100 5.0 4.0 500

SDVL5650SD180PT 18 12.7 22.0~28.0 40 10.0 5.8 1200

SDVL5650SD480PT 48 34.1 54.0~67.0 100 10.0 7.7 1000

SDVL 5.5～100Vdc 0.5～12.0 250～1200

VaristorVaristor for for EElectrical lectrical SSurge urge SSuppressinguppressing SpecificationSpecification


These products are used for suppressing over-voltage and absorbing energy to protect AC-DC module.


Part NumberMax. Working

Voltage Varistor Voltage


Rated Single Pulse Transient

Test Condition<20μA

@1mA DC 8/20μs Energy

10/1000μs

Peak Current 8/20μsDC AC

RMS

Units Volts Volts Volts Volts Amps Joules Amps

Symbol VWDC VWAC VB VC Ic ET IPSDVL8063KA151PT 200 150 216~264 395 5.0 6.8 400

SDVL10080KA151PT 200 150 216~264 395 10.0 15.4 1200

SDVL8063KA301PT 385 300 423~517 775 5.0 13.4 400

SDVL10080KA301PT 385 300 423~517 775 10.0 32.2 1200

SDVL10080KA461PT 615 460 675~825 775 10.0 50.4 1000

VaristorVaristor for for EElectrical lectrical SSurge urge SSuppressinguppressing SpecificationSpecification


These products are used for absorbing energy to protect AC-DC module. Bigger size product has larger surge energy capability.

VPS Electrical Performance Specification VPS Electrical Performance Specification

Part Number

Max. Allowable Voltage

Varistor Voltage @1mA

Max. ClampingVoltage

@8/20uS, test Current

Max. Energy

@10/1000 uS

Max. Peak Current

@8/20uS1 times

Rated Power

Typical Capacitance

@1kHz

ACrms(V) DC(V) Min. Vb(V) Max. Vc(V) Ip(A) （J）（A）（W）（pF）

VPS05KD300BS 300 385 423 470 517 810 5 15.0 400 0.10 70

VPS07KD300BS 300 385 423 470 517 775 10 30.0 1200 0.25 130

VPS10KD300BS 300 385 423 470 517 775 25 70.0 2500 0.40 300

VPS14KD300BS 300 385 423 470 517 775 50 125.0 4500 0.60 550

VPS20KD300BS 300 385 423 470 517 775 100 220.0 6500 1.00 1200


Data Rate and Data Rate and VaristorVaristor CorrelationCorrelation

SpeakerMicrophone

Audio Headset

STBVCR

Video In/Out

MouseKeyboardSerial Port

MouseKeyboard

HubPDAMP3

Digital CameraScanner

Game Controller

Control System

Netwokr HardwarePCI Adapter

HubRouter

WebswitchCable

xDSL modem

TFT Displayer

Digital Video RecorderHard Disk Drive

Video Editing SystemScannerDesktopLaptop

Digital Still CameraPrinter

Hard Disk DriveVideo Editing System

ScannerDesktopLaptop

HubR/W CDsWebpad

Internet Appliance

Host Channel AdapterTarget Channel Adapter

SwitchParallel Port

PrinterScanner

Audio

Video

0 0.03 0.05 0.13 2 12 25 125 165 320 480 2500 3950

RS232

IEEE1284

USB1.1

RS485

Ethernet

LCDS

USB2.0 HDMIDVI

InfiniBand

Data Rate(Mbit/sec)

Data Protocols

SDV-A

SDV-E

SDV-H/SPESD

Typical Application


Perfect quality assurance system ：

ISO9001：2008，ISO/TS16949：2008

QC080000：2005，SONY GP

Standard：

MIL-STD-202 IEC-68

IEC61000-4-2 IEC61000-4-5

Products Reliability under the normal working voltage:

High load, High temperature and humidity load、……

Products Reliability under the over-voltage shocking:

Lightning induced voltage generator (8/20μs), Switcthing over- voltage generator (10/1000μs), ESD generator and measurement system, test the pulse life.

Products Reliability


Products Reliability Products Reliability

Pulse Current (8/20Pulse Current (8/20μμss、、10/100010/1000μμs s GeneratorGenerator

ESD Generator and test systemESD Generator and test system


New Products--- (0.5pf) SDV1005H260C0R5YPTFSDV1608H260C0R5YPTF

Frequency vs. Capacitance

0.00

0.20

0.40

0.60

0.80

1.00

1 10 100 1000 10000

frequency（MHz）

Capacitance（

pF）

Frequency vs. Transmission

-30.00

-25.00

-20.00

-15.00

-10.00

-5.00

0.00

10 100 1000 10000

Frequency（MHz）

Attenuation S11(dB)

The product is used for ESD protection on USB3.0 and HDMI.

When the product is used,cut-off frequency of signal is not less than 2GHZ @-3dB.


New product--- PESD (Max 0.15pf)

Frequency vs. Capacitance

0.000.010.020.030.040.050.060.070.080.090.10

1 10 100 1000 10000Frequency (MHz)

Cap

acita

nce

(pF)

Frequency vs. Transmission

-0.8-0.7

-0.6-0.5

-0.4-0.3

-0.2-0.1

0.0

10 100 1000 10000Frequency (MHz)

Atte

nuat

ion

S11

(dB)

The product is used for ESD protection on USB3.0 and HDMI.

When the product is used, cut-off frequency of signal is greater than 6GHZ @-3dB.


New product--- SDVL3225/4532/5650 Varistor

These products are used for suppressing over-voltage and absorbing energy to protect DC-DC module, can replace TVS.

Pulse current life chart-SDVL4532SD180PT

0

100

200

300

400

500

600

700

800

900

0 50 100 150 200 250

Pulse current times

Current(A)


ContentContent






Application ExampleApplication Example--LCDLCD--TTVV/STB/PC/STB/PC

No. Sunlord Varistor Effect Parameter1 SDVL10080KA301PT/

VPS14KD300BSsuppressing Induced over-voltage cased by power and lightning

Vac=220V, Ip=1200A, Et=32.2J

2/3 SDVL4532SD300PT suppressing Induced / switching over-voltage cased by lightning and power, protecting DC-DC Module （can replace TVS such as SMAJ/SMBJ）

Vdc=24V, Ip=400～800A, Et=1.7～3.7J

4 SDVL5650SD5R5PT series connect with GDT(BC201M)/Diode(SDMA)

suppressing Induced over-voltage cased by lightning for LAN port(can replace TVS such as SMCJ/SMDJ)

Vsig≤3.6V, Ip=800~1200A, Et=1.9～4.0JCp＜1pf

Signal I/O

AC AC-DC DC-DC ICdriver

LAN Port

1 2 3 4L

N

2Note: According to electromagnetic pulse source and energy pulse, may be omitted.


No. Sunlord Varistor Effect ParameterZ1 SDVL4532SD300PT suppressing surge over-

voltage cased by powerVdc=24V, Ip=400～800A, Et=1.7～

3.7J

Z2 Resisitance 5～10Ω/or Inductor 10～100μH

Coupling between surge protection

Resistance / inductance parameter don’t affect the power and the rated current, the specific parameters required test verificatiomn

Z3 SDVL3216SD300PT suppressing surge over- voltage cased by power

Vdc=24V, Ip=300A, Et=0.7J

For 2 / 3 line, the following programs can also be used to achieve a better surgeprotection purposes :

Z1

Z2

Z3 IC

Application ExampleApplication Example--LCDLCD--TTVV/STB/PC/STB/PC


TV Control

(CPU&DSP)USB

IEEE1394

HDMI

LAN

S-Video

Audio Line

IEEE1394

LCD Panel

Audio Line

Video Line

Speaker

DC-DC Conveter

Clock

Antenna

CATVSatelite

RF Tuner

78

6

2

3

8

8

3

1

6

4

Keypad5

9

Application ExampleApplication Example--LCDLCD--TTV/STB/PCV/STB/PC

AC-DC 1010


No.No. Application Sunlord Varistor

11 HDMI / RFHDMI / RF SDV1005H260C0R5YPTSDV1005H260C0R5YPT

22 USB3.0USB3.0 PESD1005H140CR15GPTPESD1005H140CR15GPT

22 USB2.0USB2.0 SDV1005H260C030YPTSDV1005H260C030YPT

33 IEEE1394IEEE1394 SDV1005H260C030YPTSDV1005H260C030YPT

44 LANLAN SDV1005H260C030YPTSDV1005H260C030YPT

55 KeypadKeypad SDV1005E180C150NPTSDV1005E180C150NPT

66 VideoVideo SDV1005E180C150NPTSDV1005E180C150NPT

77 LCD PanelLCD Panel SDV1005H180C150NPT or SDV1005H180C150NPT or SDVA2082VA180C150NPTSDVA2082VA180C150NPT

88 Audio/SpeakerAudio/Speaker SDV1005A5R5C201NPTSDV1005A5R5C201NPT

99 DCDC--DCDC SDV1608A5R5C201NPTSDV1608A5R5C201NPT

1010 ACAC--DCDC AC：SDV10080KA301PTF/ VPS14KD300BS

DC：SDVL4532SD300PTSDVL4532SD300PT

LCD-TV

I/F

Panel

Above Above 1005 products can be replaced by the same parameter 0603 product1005 products can be replaced by the same parameter 0603 product, except for 8 / 9 ., except for 8 / 9 .

Application ExampleApplication Example--LCD TV/MonitorLCD TV/Monitor


No. Sunlord Varistor Effect Parameter1 SDVL10080KA301PT/

VPS10KD300BSSuppressing Induced over- voltage cased by power and lightning

Vac=220V, Ip=1200A, Et=32.2J

2/3 SDVL4532SD300PT suppressing Induced / switching over-voltage cased by lightning and power, protecting DC-DC Module （can replace TVS such as SMAJ/SMBJ）

Vdc=24V, Ip=400～800A, Et=1.7～3.7J

4 For LAN/Video ports: SDVL5650SD5R5PT series connect with GDT (BC201M)/Diode(SDMA)SDMA)

suppressing Induced over- voltage cased by lightning for signal (can replace TVS such as SMCJ/SMDJ)

Vsig≤3.6V, Ip=800～1200A, Et=1.9～4.0J, Cp＜1pf

For others ports: SDV1608H300C100NPT

ESD protection for ports Vdc=24V, Cp=10~360pf

Signal I/O

AC AC-DC DC-DC ICdriver Ports

1 2 3 4L

N

2

Application ExampleApplication Example--Communication/PLC/Security systemCommunication/PLC/Security system

Note: According to electromagnetic pulse source and energy pulse, may be omitted.


Z1

Z2

Z3 IC

Application ExampleApplication Example--Communication/PLC/Security systemCommunication/PLC/Security system

For 2 / 3 line, the following programs can also be used to achieve a better surgeprotection purposes :

No. Sunlord Varistor Effect ParameterZ1 SDVL4532SD300PT suppressing surge over-

voltage cased by powerVdc=24V, Ip=400～800A, Et=1.7～

3.7J

Z2 Resisitance 5～10Ω/or Inductor 10～100μH

Coupling between surge protection

Resistance / inductance parameter don’t affect the power and the rated current, the specific parameters required test verificatiomn

Z3 SDVL3216SD300PT suppressing surge over- voltage cased by power

Vdc=24V, Ip=300A, Et=0.7J


AC AC-DC DC-DC

1 2

3Current data

Voltage data

Keypad

Remote Syslog

4

5

6

Application ExampleApplication Example--EnergyEnergy metermeter


Application ExampleApplication Example--EnergyEnergy metermeterNo. Sunlord Varistor Effect Parameter

1 SDV10080KA301PT/VPS14KD300BS

suppressing Induced over- voltage cased by lightning

System rated voltage：Vac=220V, Max. Vac=300V, Ip=1200A, Et=32.2J

2 SDVL3216SD180PT suppressing Induced / switching over-voltage cased by lightning and switching, protecting DC-DC Module

System rated voltage ：Vdc=12VMax. Vdc=18V, Ip=300A, Et=0.7J

3 SDV1608A5R5C201NPTF suppressing Induced over- voltage cased by lightning, protecting Current data module

Max. Vdc=5.5V, Ip=30A, Et=0.1J

4 SDV1608A5R5C201NPTF suppressing Induced over- voltage cased by lightning, protecting Voltage data module

Max. Vdc=5.5V, Ip=30A, Et=0.1J

5 SDV1608A5R5C201NPTF/ SDV1608H180C050YPTF

suppressing Induced over- voltage cased by lightning and ESD, protecting buttons.

Max. Vdc=5.5V, Ip=30A, Et=0.1J/General ESD protection

6 SDV1608A5R5C201NPTF/ SDV1608H180C050YPTF

suppressing Induced over- voltage cased by lightning and ESD, protecting remote record module.

Max. Vdc=5.5V, Ip=30A, Et=0.1J/General ESD protection


Application Example-Automotive Electronic

Driveline

Chassis ControlSystem

Electronic StabilizationProgram Power rear view

mirror control system

Vehicle Lamp Control System

Lock Control System

Power Windows

Air ConditioningControl System

Supplemental Inflatable Restraint

Control System

Automotive ElectronicsControl Gear

Driving InformationSystem

Navigational System

Car Sound Systems

On-board communication

system

Tire Pressure Monitor Systems

Mounted AutomotiveElectronic

12V/24Vdc

12V/24Vdc1

2

3

4

5

6

7

8

9

10

11

12

13


No. Sunlord Varistor Effect

1～2 SDVL4532SD180PT/ SDVL4532SD300PT

Suppressing Switching over- voltage cased by load dump transient

3～8 SDVL3216SD180PT/ SDVL3216SD300PT

Suppressing Switching over- voltage cased by load dump transient

9～13 SDV2012A180C701NPTF/ SDV2012A300C401NPTF/ SDV1608E260C500NPTF

Suppressing Switching over- voltage cased by load dump transient and ESD

Application Example-Automotive Electronic


THANK YOU!

www.sunlordinc.com

Whole systematic over-voltage protection circuit design

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