BD9888F Просмотр технического описания (PDF) - ROHM Semiconductor
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производитель
BD9888F Datasheet PDF : 5 Pages
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〇Package Dimensions
(Include BURR 18.85)
BD9888F
Device Mark
3/4
(Include BURR 10.35)
BD9888FV
SOP28 (unit:mm)
Lot No.
SSOP-B28 (unit:mm)
〇Block Diagram
VCC REG VREF
REG
BLOCK
STB
STB
SYSTEM ON/OFF
BLOCK
SS
FB1
IS1
F/B
VS1
BLOCK①
SS
CT
FB2
IS2
F/B
VS2
BLOCK②
SS
CT
GND
PROTECT
BLOCK
SCP SRT
〇Pin Description
CT RT
BRT BCT
DUTY
OSC
BOSC
DUTY
BLOCK
UVLO
VCC
BLOCK
PWM
BLOCK①
PWM
BLOCK②
LOGIC
BLOCK
①
LOGIC
BLOCK
②
VCC
OUTPUT
BLOCK①
VCC
OUTPUT
BLOCK②
COMP BLOCK
VOLTAGE
VOLTAGE
DIFFERENCE
DIFFERENCE
DETECT BLOCK DETECT BLOCK
①
②
NA1
NB1
NA2
NB2
PGND
COMPA1
COMPA2
COMPB1
COMPB2
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin
Name
DUTY
BRT
BCT
RT
SRT
CT
GND
FB1
IS1
VS1
FB2
IS2
VS2
VREF
COMPA1
STB
COMPB1
COMPA2
COMPB2
REG
SS
SCP
NA2
NB2
PGND
NB1
NA1
Vcc
Function
Control PWM mode and BURST mode
External resistor from BRT to GND for
adjusting the BURST triangle oscillator
External capacitor from BCT to GND for
adjusting the BURST triangle oscillator
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
Error amplifier output①
Error amplifier input①
Error amplifier input②
Error amplifier output②
Error amplifier input③
Error amplifier input④
Reference voltage
Voltage difference or under voltage
detect for 1ch
Stand-by switch
Voltage difference or under voltage
detect for 1ch
Voltage difference or under voltage
detect for 2ch
Voltage difference or under voltage
detect for 2ch.
Internal regulator output
External capacitor from SS to GND for
Soft Start Control
External capacitor from SCP to GND for
Timer Latch
FET driver for 2ch
FET driver for 2ch
Ground for FET drivers
FET driver for 1ch
FET driver for 1ch
Supply voltage input
REV. A
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