BD9892K Ver la hoja de datos (PDF) - ROHM Semiconductor
Número de pieza
componentes Descripción
Fabricante
BD9892K Datasheet PDF : 5 Pages
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〇Package Dimensions
〇Pin Description
Device Mark
Pin No. Pin Name
Function
BD9892K
Lot No.
QFP44 (unit:mm)
〇Block Diagram
VCC_A VCC_B REG VREF
CT RT BRT BCT_A BCT_B
DUTY
PH
STB
SS_A
SS_B
FB1
IS1
VS1
FB2
IS2
VS2
FB3
IS3
VS3
FB4
IS4
VS4
GND
REG
BLOCK
STB
BLOCK
SYSTEM ON/OFF
OSC
BLOCK
F/B
BLOCK①
F/B
BLOCK②
SS_A
CT
PWM
BLOCK①
SS_A
CT
PWM
BLOCK②
F/B
BLOCK③
F/B
BLOCK④
SS_B
CT
PWM
BLOCK③
SS_B
CT
PWM
BLOCK④
PROTECT
BLOCK
BOSC
BLOCK
DUTY
BLOCK
UVLO
VCC
BLOCK
LOGIC
BLOCK①
VCC_A
OUTPUT
BLOCK①
UVLO
NA1
NB1
LOGIC
BLOCK②
LOGIC
BLOCK③
LOGIC
BLOCK④
VCC_A
OUTPUT
BLOCK②
VCC_B
OUTPUT
BLOCK③
NA2
NB2
PGND_A
NA3
NB3
VCC_B
OUTPUT
BLOCK④
NA4
NB4
PGND_B
FAIL
COMP_A COMP_B CP_A CP_B SRT
1
COMP_A Over voltage detect for 1ch,2ch
2
NA1 FET driver for 1ch
3
NB1 FET driver for 1ch
4
PGND_A Ground for FET drivers
5
NB2 FET driver for 2ch
6
NA2 FET driver for 2ch
7
STB Stand-by switch
8
VCC_A Supply voltage input
Reference voltage input for IS error
9
VREF
amplifier
10
FAIL Protect clock output
11
PH
Shift control input
12
REG Internal regulator output
13
DUTY Control PWM mode and BURST mode
External resistor from BRT to GND for
14
BRT
adjusting the BURST triangle oscillator
External capacitor from BCT to GND for
15
BCT_B adjusting the BURST triangle oscillator
for 3ch,4ch
External capacitor from BCT to GND for
16
BCT_A adjusting the BURST triangle oscillator
for 1ch,2ch
17
GND GROUND
18
CT
External capacitor from CT to GND for
adjusting the triangle oscillator
External resistor from RT to GND for
19
RT
adjusting the triangle oscillator
External resistor from SRT to RT for
20
SRT
adjusting the triangle oscillator
21
CP_A
External capacitor from CP to GND for
Timer Latch for 1ch,2ch
External capacitor from CP to GND for
22
CP_B
Timer Latch for 3ch,4ch
23
SS_A External capacitor from SS to GND for Soft
Start Control 1ch,2ch
24
SS_B
External capacitor from SS to GND for Soft
Start Control 3ch,4ch
25
VCC_B Supply voltage input
26
UVLO External Under Voltage Lock OUT
27
NA4 FET driver for 4ch
28
NB4 FET driver for 4ch
29
PGND_B Ground for FET drivers
30
NB3 FET driver for 3ch
31
NA3 FET driver for 3ch
32
COMP_B Over voltage detect for 3ch,4ch
33
VS4 Error amplifier input④
34
IS4 Error amplifier input④
35
FB4 Error amplifier output④
36
VS3 Error amplifier input③
37
IS3 Error amplifier input③
38
FB3 Error amplifier output③
39
FB2 Error amplifier output②
40
IS2 Error amplifier input②
41
VS2 Error amplifier input②
42
FB1 Error amplifier output①
43
IS1 Error amplifier input①
44
VS1 Error amplifier input①
REV. B
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