BD8312HFN(2009) 查看數據表（PDF） - ROHM Semiconductor
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产品描述 (功能)
生产厂家
BD8312HFN
(Rev.:2009)
(Rev.:2009)
ROHM Semiconductor
BD8312HFN Datasheet PDF : 15 Pages
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BD8312HFN
Description of Pins
GND
VCC
VREG
PGND
INV
STB
PVCC
Lx
Fig.1 Terminal layout
Technical Note
Pin No. Pin Name
1
GND
2
VCC
3
VREG
4
PGND
5
Lx
6
PVCC
7
STB
8
INV
Function
Ground terminal
Control part power input terminal
5 V output terminal of regulator for
internal circuit
Power transistor ground terminal
Coil connecting terminal
DC/DC converter input terminal
ON/OFF terminal
Error AMP input terminal
Block Diagram
ON/OFF
STB
VREG VCC
PVCC
GND
STBY_IO
5V REG
Reference UVLO
VREF
VREF
OSC
1.5MHz
FB H
STOP
SCP
OSC×4000 ｃount
PRE
DRIVER
450mΩ
PWM
CONTROL
Step down
TIMMING
CONTROL
VREG
PRE
DRIVER
ERROR_AMP
300mΩ
INV
Soft
Start
OSC×8000 ｃount
LX
PGND
Fig.2 Block diagram
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© 2009 ROHM Co., Ltd. All rights reserved.
3/14
2009.04- Rev.B
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