RT9239 Просмотр технического описания (PDF) - Richtek Technology
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RT9239 Datasheet PDF : 6 Pages
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Function Block Diagram
Preliminary
RT9239
EN
SS
GND
FB
10µA
4.5V
Vref
Soft
Start
Power-on
Reset
Over Current
Comparator
Error
Amp
+_
Control
+_+ PWM
Logic
Comparator
Gate
Control
Oscillator
Logic
200µA
VCC
OCSET
PHASE
PVCCH
UGATE
PVCCL
LGATE
PGNDL
Pin Description
Pin No. Pin Name
1
NC
2
OCSET
3
SS
4
NC
5
FB
6
EN
7
GND
8
PHASE
9
UGATE
10
PVCCH
11
PGNDL
12
LGATE
13
PVCC
14
VCC
Pin Function
No connection
Current limit set pin with 200µA current sink
Soft start, connect a capacitor from this pin to GND
No connection
Voltage-control feedback loop input
Regulator enable with low shutdown
Ground
Current limit sense input
High side driver output
High side driver power
Low side driver GND
Low side driver output
Low side driver power
Power supply input
DS9239-00 June 2001
www.richtek-ic.com.tw
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