Data Sheet

ManualsBrandsON SEMICONDUCTOR ManualsPMICsPMIC - gate drivers Non-inverting 3-phase H bridge SOIC 20

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2

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8

9

© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com

FAN7888 • Rev.1.5 2

FAN7888 — 3 Half-Bridge Gate-Drive IC

Typical Application Circuit

Figure 1. 3-Phase BLDC Motor Drive Application

Internal Block Diagram

Figure 2. Functional Block Diagram

U

V

W

UU

UL

VU

VL

WU

WL

Up to 200V

+15V

Q4 Q6 Q2

Q1 Q3 Q5

Q1

Q3

Q5

Q4

Q6

Q2

3-Phase Inverter

GND

LO3

LIN1

V

DD

V

S1

HO1

V

B1

HIN1

V

S2

HO2

V

B2

V

S3

HO3

V

B3

HIN2

HIN3

LIN2

LIN3

LO2

LO1

20

19

18

17

16

15

14

13

12

1

2

3

4

5

6

7

8

9

10

V

S1

V

S3

V

S2

V

S2

V

S3

V

S1

FAN7888

3-Phase

BLDC Motor

Controller

I

U

I

V

I

W

11

FAN7888 Rev.00

UVLO

R

R

S

Q

DELAY

DRIVER

DRIVER

W Phase Driver

V Phase Driver

U Phase Driver

LO2

V

S2

HO2

V

B2

LO3

V

S3

HO3

V

B3

UHIN

ULIN

V

DD

VHIN

V

DD

WLIN

VDD_UVLO

HIN1

HIN2

HIN3

LIN1

LIN2

LIN3

VLIN

WHIN

SCHMITT

TRIGGER INPUT

SHOOT-THOUGH

PREVENTION

CONTROL LOGIC

UVLO

VDD

V

DD

LO1

GND

V

S1

HO1

V

B1

NOISE

CANCELLER

PULSE

GENERATOR

FAN7888 Rev.01