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KA3883CD Datasheet

  • KA3883CD

  • SMPS Controller

  • 45.89KB

  • 6页

  • FAIRCHILD

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www.fairchildsemi.com
KA3882C/KA3883C
SMPS Controller
Features
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Low Start Current 0.2mA (Typ)
Operating Range Up To 500kHz
Cycle by Cycle Current Limiting
Under Voltage Lock Out With Hysteresis
Short Shutdown Delay Time: Typ.100ns
High Current Totem-Pole Output
Output Swing Limiting: 22V
Description
The KA3882C/KA3883C is a fixed PWM controller for Off
Line and DC to DC converter applications. The internal
circuits include an UVLO, a low start up current circuit, a
temperature compensated reference, a high gain error
amplifier, a current sensing comparator, and the high current
totem-pole output for driving a POWER MOSFET. Also the
KA3882C/KA3883C provides low start-up current below
0.3mA and short shutdown delay time typ. 100ns. The
KA3882C has the UVLO threshold of 16V (on) and
10V(off). The KA3883C is 8.4V(on) and 7.6V(off). The
KA3882C and KA3883C can operate within 100% duty
cycle.
8-DIP
1
8-SOP
1
Internal Block Diagram
7
V
CC
29V
V
REF
8
Internal
Bias
1/2V
REF
5V
V
REF
SET/
RESET
UVLO
5
GND
Good LOGIC
7
PWR
V
C
V
FB
2
Error Amp
+
-
C.S
PWM
Comp. LATCH
1/3
1V
S
R
22V
6
OUTPUT
COMP
1
5
PWR
C.S
3
R
T
/C
T
4
T
GND
OSCILLATOR
Rev. 1.0.1
漏2002 Fairchild Semiconductor Corporation

KA3883CD 产品属性

  • Fairchild Semiconductor

  • 500 KHz

  • 100 %

  • 40 ns

  • 40 ns

  • 1

  • + 70 C

  • SMD/SMT

  • SOP-8

  • 0 C

  • 1000 mA

  • Rail

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