BD9890FV Ver la hoja de datos (PDF) - ROHM Semiconductor
Número de pieza
componentes Descripción
Fabricante
BD9890FV Datasheet PDF : 5 Pages
| |||
〇Package Dimensions
BD9890F
Device Mark
3/4
BD9890FV
Lot No.
SOP28 (unit:mm)
SSOP-B28 (unit:mm)
〇Block Diagram
VCC REG VREF
CT RT
BRT BCT
DUTY
REG
BLOCK
OSC
BOSC
DUTY
BLOCK
STB
STB
SYSTEM ON/OFF
BLOCK
SS
UVLO
VCC
BLOCK
FB1
IS1
F/B
VS1
BLOCK①
SS
PWM
BLOCK①
CT
LOGIC
BLOCK
①
VCC
OUTPUT
BLOCK①
FB2
IS2
F/B
VS2
BLOCK②
SS
PWM
BLOCK②
CT
LOGIC
BLOCK
②
VCC
OUTPUT
BLOCK②
GND
PROTECT
BLOCK
COMP1 COMP2 SCP SRT
〇Pin Description
Pin No.
1
2
3
4
UVLO
5
NA1
6
NB1
7
8
9
NA2
NB2
10
11
PGND
12
13
FAIL
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
FAIL
STB
COMP1
COMP2
UVLO
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
Protect clock output
Stand-by switch
Under voltage detect for 1ch
Under voltage detect for 2ch
External Under Voltage Lock OUT
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
Share Link: 