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KA3882E Datasheet

  • KA3882E

  • SMPS Controller

  • 6頁

  • FAIRCHILD

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上傳產(chǎn)品規(guī)格書

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www.fairchildsemi.com
KA3882E/KA3883E
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 KA3882E/KA3883E is a fixed PWM controller for
Off-Line and DC to DC converter applications. The internal
circuits include a 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
KA3882E/KA3883E provides low start-up current below
0.3mA and short shutdown delay time typ. 100ns. The
KA3882E has UVLO threshold of 16V(on) and 10V(off).
The KA3883E is 8.4V(on) and 7.6V(off). The KA3882E and
KA3883E 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
Error Amp
+
-
C.S
PWM
Comp. LATCH
1/3
1V
S
R
22V
6
OUTPUT
PWR
V
C
V
FB
2
COMP
1
5
PWR
C.S
3
R
T
/C
T
4
T
GND
OSCILLATOR
Rev. 1.0.1
漏2003 Fairchild Semiconductor Corporation

KA3882E 產(chǎn)品屬性

  • Fairchild Semiconductor

  • 500 KHz

  • 100 %

  • 40 ns

  • 40 ns

  • 1

  • + 70 C

  • Through Hole

  • PDIP-8

  • 0 C

  • 1000 mA

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