BD9897FS Rohm, BD9897FS Datasheet - Page 3

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BD9897FS

Manufacturer Part Number
BD9897FS
Description
DC-AC Inverter Control IC
Manufacturer
Rohm
Datasheet

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〇Package Dimensions
〇Block Diagram
SSOP-A32 (Unit:mm)
BD9897FS
Lot No.
Device Mark
REV. B
〇Pin Description
PIN
No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
2
3
4
5
6
7
8
9
CT_SYNC_OUT
CT_SYNC_IN
PIN NAME
DUTY_OUT
COMP2
COMP1
PGND
BST2
DUTY
FAIL
VREF
UVLO
BST1
LN2
HN2
SW2
SRT
GND
BCT
BRT
STB
VCC
REG
SW1
HN1
LN1
RT
CT
CP
VS
IS
FB
SS
Ground for FET drivers
NMOS FET driver
NMOS FET driver
Lower rail voltage for HN2 output
Boot-Strap input for HN2 output
CT synchronous signal input pin
CT synchronous signal output pin
External resistor from SRT to RT for adjusting
the triangle oscillator
External resistor from SRT to RT for adjusting
the triangle oscillator
External capacitor from CT to GND for adjusting
the triangle oscillator
GROUND
External capacitor from BCT to GND for adjusting
the BURST triangle oscillator
External resistor from BRT to GND for adjusting
the BURST triangle oscillator
Control PWM mode and BURST mode
BURST signal output pin
Stand-by switch
External capacitor from CP to GND for Timer Latch
COMP2 under voltage protect clock output
Reference voltage input pin for Error amplifier
Error amplifier input
Error amplifier input
Error amplifier output
External capacitor from SS to GND for Soft Start
Control
Under, over voltage detect pin
Over voltage detect pin
Supply voltage input
External Under Voltage Lock Out
Internal regulator output
Boot-Strap input for HN1 output
Lower rail voltage for HN1 output
NMOS FET driver
NMOS FET driver
FUNCTION
3/4

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