BD9897 Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BD9897

Silicon Monolithic Integrated Circuit

ROHM Semiconductor 

〇Package Dimensions

3/4

〇Pin Description

Device Mark

BD9897FS

Lot No.

SSOP-A32 (Unit：mm)

〇Block Diagram

PIN

No.

PIN NAME

FUNCTION

1

PGND

Ground for FET drivers

2

LN2

NMOS FET driver

3

HN2

NMOS FET driver

4

SW2

Lower rail voltage for HN2 output

5

BST2

Boot-Strap input for HN2 output

6

CT_SYNC_IN CT synchronous signal input pin

7

CT_SYNC_OUT CT synchronous signal output pin

8

SRT

External resistor from SRT to RT for adjusting

the triangle oscillator

9

RT

External resistor from SRT to RT for adjusting

the triangle oscillator

10

CT

External capacitor from CT to GND for adjusting

the triangle oscillator

11

GND

GROUND

12

BCT

External capacitor from BCT to GND for adjusting

the BURST triangle oscillator

13

BRT

External resistor from BRT to GND for adjusting

the BURST triangle oscillator

14

DUTY

Control PWM mode and BURST mode

15

DUTY_OUT

BURST signal output pin

16

STB

Stand-by switch

17

CP

External capacitor from CP to GND for Timer Latch

18

FAIL

COMP2 under voltage protect clock output

19

VREF

Reference voltage input pin for Error amplifier

20

VS

Error amplifier input

21

IS

Error amplifier input

22

FB

Error amplifier output

23

SS

External capacitor from SS to GND for Soft Start

Control

24

COMP2

Under, over voltage detect pin

25

COMP1

Over voltage detect pin

26

VCC

Supply voltage input

27

UVLO

External Under Voltage Lock Out

28

REG

Internal regulator output

29

BST1

Boot-Strap input for HN1 output

30

SW1

Lower rail voltage for HN1 output

31

HN1

NMOS FET driver

32

LN1

NMOS FET driver

REV. B

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