Fairchild FAN7085_GF085 service manual

FAN7085_GF085

High Side Gate Driver with Recharge FET

FAN7085_GF085 High Side Gate Driver with Recharge FET

November 2009

Features

• Qualified to AEC Q100

• Floating channel designed for bootstrap operation fu lly operational up to 300V.

• Tolerance to negative transient voltage on VS pin

• dv/dt immune.

• Gate drive supply range from 4.5V to 20V

• Under-voltage lockout

• CMOS Schmitt-triggered inputs with pull-down and pull-up

• High side output out of phase with input (Inverted input)

• Reset input

• Internal recharge FET for bootstrap refresh

Typical Applications

• Diesel and gasoline injectors/valves

• MOSFET-and IGBT high side driver applications

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Description

The FAN7085_GF085 is a high-side gate drive IC with reset input and built-in recharge FET. It is designed for high voltage and high speed driving of MOSFET or IGBT, which operates up to 300V. Fairchild's high-voltage process and common-mode noise cancellation technique provide stable operation in the high side driver under high-dV/dt noise circumstances. Logic input is compatible with standard CMOS outputs. The UVLO circuits prevent from malfunction when VCC and VBS are lower than the specified threshold voltage. It is available with space saving SOIC-8 Package. Minimum source and sink current capability of output driver is 250mA and 250mA. Built-in recharge FET to refresh bootstrap circuit is very useful for circuit topology requiring switches on low and high side of load.

SOIC-8

Ordering Information

Device Package

FAN7085M SOIC-8 -40 °C ~ 125 °C FAN7085MX SOIC-8 -40 °C ~ 125 °C

X : Tape & Reel type

FAN7085_GF085 Rev. 1.0.0

Operating

Temp.

Block Diagrams

VCC

Under Voltage

Reset VCC to GND

Under

Voltage Reset

VB to VS

Pulse Filter

Flip Flop

Brake before

make

FAN7085_GF085 High Side Gate Driver with Recharge FET

RESET-

IN-

GND

Pin Assignments

Pin Definitions

Level Shifter Logic Pulse

Filter

VCC

IN-

GND

RESET-

Level Shifter

OFF

Delay

Recharge Path

Pine Number Pin Name I/O Pin Function Description

1 VCC P Driver supply voltage, typically 5V 2 IN- I Driver control signal input (Negative Logic) 3GNDPGround 4 RESET- I Driver enable input signal (Negative Logic) 5 VS P High side floating offset for MOSFET Source connection 6 NC - No connection (No Bond wire) 7 HO A High side drive output for MOSFET Gate connection 8 VB P Driver output stage supply

FAN7085_GF085 Rev. 1.0.0

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Absolute Maximum Ratings

Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to GND.

Parameter Symbol Min. Max. Unit

High side floating supply voltage VBS -0.3 25 V High side driver output stage voltage

Neg. transient: 0.5 ms, external MOSFET off

High side floating supply offset voltage

Neg. transient 0.2 us

High side floating output voltage V Supply voltage V Input voltage for IN- V Input voltage for RESET- V Power Dissipation Thermal resistance, junction to ambient

Electrostatic discharge voltage (Human Body Model)

Charge device model V Junction Temperature Tj 150 °C Storage Temperature T

Note: 1) The thermal resistance and power dissipation rating are measu red bellow conditions;

JESD51-2: Integrated Circuit Thermal Test Method Environmental Conditions - Natural condition(StillAir) JESD51-3: Low Effective Thermal Conductivity Test Board for Leaded Surface Mount Package

VB -5 325 V

Vs -25 300 V

HO VS-0.3 VB+0.3 V CC -0.3 25 V

IN -0.3 Vcc+0.3 V

RES -0.3 Vcc+0.3 V

Pd 0.625 W Rthja 200 °C/W V

ESD

CDM

1.5K V

500 V

-55 150 °C

FAN7085_GF085 High Side Gate Driver with Recharge FET

Recommended Operating Conditions

For proper operation the device should be used within the recommended conditions.-40°C <= Ta <= 125°C

Parameter Symbol Min. Max. Unit

High side floating supply voltage(DC)

Transient:-10V@ 0.2 us

High side floating supply offset voltage(DC)

@VBS=7V

High side floating supply offset voltage(Transient)

0.2us @VBS<25V

High side floating output voltage V Allowable offset voltage Slew Rate

Supply voltage for logic part V Input voltage for IN- V Input voltage for RESET- V Switching frequency Minimum low input width Minimum high input width

Minimum operating voltage of VB related to GND V Ambient temperature T

Note: 1) Guaranteed by design.

2) Duty = 0.5, VBS >=7V

3) Guaranteed by design. Pulse widths below the specified values, may be ignored. Output will either follow the input signal or will ignore it. No false output state is guaranteed when minimum input width is smaller than tin

4) Guaranteed by design

VB VS+4.5 VS+20 V

-3 300 V

VS -25 300 V

HO Vs VB V

dv/dt - 50 V/ns

CC 4.5 20 V

IN 0 Vcc V

RESET 0 Vcc V

Fs 200K Hz

tIN(low,min) 1000 - ns

tIN(high,min) 60 - ns

B(MIN)

a -40 125 °C

4- V

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Statics Electrical Characteristics

Unless otherwise specified, -40°C <= Ta <= 125°C, VCC = 5V, VBS = 7V, VS = 0V, VRESET = 5V, RL = 50Ω, CL = 2.5nF.

Parameter Symbol Conditions Min. Typ. Max. Unit

VCC and VBS Supply Characteristics

CC and VBS supply under voltage

positive going threshold

CC and VBS supply under voltage

V negative going threshold

CC and VBS under voltage hysteresis VCCUVH

Under voltage lockout response time tduvcc

Offset supply leakage current I Quiescent Vcc supply current I Quiescent VBS supply current I

Quiescent VBS supply current I

VBS drop due to output turn-on (Design guaranty)

Input Characteristics

High logic level input voltage for IN- V Low logic level input voltage for IN- V Low logic level input bias current for IN- I High logic level input bias current for IN- I Full up resistance at IN R High logic level input voltage for RESET- V Low logic level input voltage for RESET- V High logic level input current for RESET- I Low logic level input bias current for RESET- I Full down resistance at RESET- R

Output characteristics

High level output voltage, V

B - VHO VOH IO=0 - - 0.1 V

Low level output voltage, VHO-GND V Peak output source current I Peak output sink current I Equivalent output resistance R

Recharge Characteristics

Recharge TR turn-on propagation delay T Recharge TR turn-off propagation delay T Recharge TR on-state voltage drop V

Dead Time Characteristics

High side turn-off to recharge gate turn-on D Recharge gate turn-off to high side turn-on D

VCCUV+

Vcc and VBS rising from 0V - 3.7 4.3 V

VBSUV+

VCCUV-

BSUV-

Vcc and VBS dropping from 5V 2.8 3.4 - V

- 0.02 0.3 - V

VBSUVH

tduvbs

LK VB=VS=300V - - 200 uA

QCC Vcc=20V - - 500 uA

QBS1 Static mode,

QBS2 Static mode,

ΔV

IN- VIN=0 5 25 60 uA

IN+ VIN=5V - - 5 uA

RES+ VRESET=5V 5 25 60 uA RES- VRESET=0 5 uA

RES 83 200 1000 ΚΩ

O+ VIN=5V 250 450 - mA O- VIN=0 250 450 - mA

on_rech 47.99.8us off_rech 0.2 0.4 us

RECH Is=1mA, VIN=5V @125°C 1.2 V

THOFF Vcc=5V, VS=7V 4 7.8 9.8 us

THON Vcc=5V, VS=7V 0.1 0.4 0.7 us

VBS: 6.5V->2.4V or 2.4V->6.5V

BS=7V, VIN=0 or 5V

BS=16V, VIN=0 or 5V

BS VBS=7V, Cbs=1uF, tdIG-IN =3uS,

IH 0.6VCC --V IL --0.28VCC V

IN 83 200 1000 ΚΩ RH 0.6Vcc - - V RL 0.28Vcc V

OL IO=0 - - 0.1 V

OP 15.5 28 Ω ON 15.5 28 Ω

TEST=100uS

VCC: 6.5V->2.4V or 2.4V->6.5V

0.5

20 20

us us

100 uA

200 uA

210 mV

FAN7085_GF085 High Side Gate Driver with Recharge FET

Note: The input parameter are referenced to GND. The VO and IO parameters are referenced to GND.

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Dynamic Electrical Characteristics

Unless otherwise specified, -40°C <= Ta <= 125°C, VCC = 5V, VBS = 7V, VS = 0V, VRESET = 5V, RL = 50Ω, CL = 2.5nF.

Parameter Symbol Conditions Min. Typ. Max. Unit

Input-to-output turn-on propagation delay tplh 50% input level to 10% output level,

S = 0V

Input-to-output turn-off propagation delay t

RESET-to-output turn-off propagation delay t RESET-to-output turn-on propagation delay t

phl 50% input level to 90% output level

phl_res 50% input level to 90% output level - 0.17 0.5 us plh_res 50% input level to 10% output level - 0.56 1 us

S = 0V

Output rising time tr1 Tj=25°C - 65 200 ns

tr2 - 400 ns tr3 Tj=25°C,V tr4 V

BS=16V 65 200 ns

BS=16V - 400 ns

Output falling time tf1 Tj=25°C - 25 200 ns

tf2 - 300 ns tf3 Tj=25°C,V tf4 V

BS=16V 25 200 ns

BS=16V - 300 ns

0.56 1 us

- 0.15 0.5 us

FAN7085_GF085 High Side Gate Driver with Recharge FET

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Fairchild FAN7085_GF085 service manual

Specifications and Main Features

Frequently Asked Questions

User Manual