Fairchild FAN7171_F085 service manual

FAN7171_F085

8-SOP

High-Current High-Side Gate Drive IC

FAN7171_F085 — High-Current High-Side Gate Drive IC

October 2011

Features

 Floating Channel for Bootstrap Operation to +600V
 4A/4A Sourcing/Sinking Current Driving Capability
 Common-Mode dv/dt Noise Canceling Circuit
 3.3V and 5V Input Logic Compatible
 Output In-phase with Input Signal
 Under- Voltage Lockout for V
 25V Shunt Regulator on V
 8-Lead Small Outline Package (SOP)
 Qualified to AEC Q100

DD

BS

and V

BS

Applications

 High-Speed Gate Driver
 High-Power Buck Converter
 Motor Drive Inverter

Description

The FAN7171_F085 is a monolithic high-side gate drive
IC, which can drive high-speed MOSFETs and IGBTs
that operate up to +600V. It has a buffered output stage
with all NMOS transistors designed for high pulse current
driving capability and minimum cross-conduction.

Fairchild’s high-voltage process and common-mode
noise canceling techniques provide stable operation of
the high-side driver under high dv/dt noise circum­stances. An advanced level-shift circuit offers high-side
gate driver operation up to V
V

=15V.

BS

The UVLO circuit prevents malfunction when V
lower than the specified threshold voltage.

The high-current and low-output voltage drop feature
makes this device suitable for sustaine switch driver and
energy recovery switch driver in the Plasma Display
Panel application, motor drive inverter, switching power
supply, and high-power DC-DC converter applications.

=-9.8V (typical) for

S

BS

is

Ordering Information

Part Number Package

FAN7171M

FAN7171MX

Note:

1. These devices passed wave soldering test by JESD22A-111.

For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com

FAN7171_F085 Rev. 1.0.0

(1)

(1)

8-SOP -40°C ~ 125°C RoHS

Operating

Temperature Range

Eco Status Packing Method

Tube

Tape & Reel

Typical Application Diagrams

D

BOOT

C2

PWM

C

BOOT

C1

D1

L1

15V

R

BOOT

R2

FAN7171_F805

V

B

IN

GND

HO

V

S

NC

NC

V

DD

7

5

6

8

2

4

3

1

R1

V

IN

V

OUT

UVLO

PULSE

GENERATOR

V

DD

GND

IN

V

B

HO

V

S

R

R

S

Q

6

7

81

4

2

NOISE

CANCELLER

Pins 3 and 5 are no connection.

25V

25V

110K

V

DD

Shoot-through current

compensated gate driver

FAN7171_F085 — High-Current High-Side Gate Drive IC

Figure 1. Application Circuit for Step-Down (Buck) DC-DC Converter

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com

FAN7171_F085 Rev. 1.0.0 2

Figure 2. Functional Block Diagram

Pin Configuration

V

S

V

B

FAN7371

V

DD

NC

IN HO

NC

4GND

3

2

1

5

6

7

8

FAN7171

_F085

FAN7171_F085 — High-Current High-Side Gate Drive IC

Figure 3. Pin Assignments(Top View)

Pin Definitions

Pin # Name Description

1VDDSupply Voltage

2 IN Logic Input for High-Side Gate Driver Output

3 NC No Connection

4 GND Ground

5 NC No Connection

6V

7 HO High-Side Driver Output

8V

S

B

High-Voltage Floating Supply Return

High-Side Floating Supply

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com

FAN7171_F085 Rev. 1.0.0 3

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera­ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi­tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only. -40°C<=T

Symbol Characteristics Min. Max. Unit

V

S

V

B

V

HO

V

DD

V

IN

/dt Allowable Offset Voltage Slew Rate ± 50 V/ns

dV

S

P

D



JA

T

J

T

STG

T

A

V

ESD

V

CDM

Notes:

1) This IC contains a shunt regulator on VDD and VBS with a normal breakdown voltage of 25V. Please note that
this supply pin should not be driven by a low-impedance voltage source greater than the VSHUNT specified in
the Electrical Characteristics section

2) Mounted on 76.2 x 114.3 x 1.6mm PCB (FR-4 glass epoxy material).

3) Refer to the following standards:
JESD51-2: Integral circuits thermal test method environmental conditions, natural convection, and
JESD51-3: Low effective thermal conductivity test board for leaded surface mount packages.

4 Do not exceed power dissipation (P

High-Side Floating Offset Voltage VB-V

High-Side Floating Supply Voltage

(2)

High-Side Floating Output Voltage VS-0.3 VB+0.3 V

Low-Side and Logic Supply Voltage

Logic Input Voltage -0.3 VDD+0.3 V

Power Dissipation

(3, 4, 5)

Thermal Resistance 200 C/W

Junction Temperature -55 150 C

Storage Temperature -55 150 C

Operating Ambient Temperature -40 125 C

Human Body Model(HBM) 1500 V

Charge Device Model 500 V

) under any circumstances.

D

<=125°C unless otherwise specified.

A

SHUNT

-0.3 625.0 V

(2)

-0.3 V

VB+0.3 V

SHUNT

0.625 W

V

FAN7171_F085 — High-Current High-Side Gate Drive IC

Recommended Operating Conditions

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not

recommend exceeding them or designing to absolute maximum ratings.

Symbol Parameter Min. Max. Unit

V

BS

V

S

V

S

V

HO

V

IN

V

DD

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com

FAN7171_F085 Rev. 1.0.0 4

High-Side Floating Supply Voltage VS+10 VS+20 V

High-Side Floating Supply Offset Voltage(DC) 6-V

High-Side Floating Supply Offset Voltage(Transient)

High-Side Output Voltage V

DD

-15(~170)

-7(~400)

S

Logic Input Voltage GND V

600 V

600

V

B

DD

Supply Voltage 10 20 V

V

V

V