參數(shù)資料
型號(hào): KA3882E
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: SMPS Controller
中文描述: 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8
封裝: DIP-8
文件頁(yè)數(shù): 1/6頁(yè)
文件大小: 48K
代理商: KA3882E
2003 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
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
8-SOP
1
1
Internal Block Diagram
8
+
-
7
5
SET/
RESET
5V
V
REF
Internal
Bias
Good LOGIC
2
R
S
OSCILLATOR
1
3
4
T
7
6
5
UVLO
29V
22V
1/3
Error Amp
1/2V
REF
1V
C.S
Comp.
PWM
LATCH
V
REF
V
FB
COMP
C.S
R
T
/C
T
OUTPUT
V
CC
GND
PWR
V
C
PWR
GND
K A3882E/K A3883E
S MPS Controller
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