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PDF KA3842 Data sheet ( Hoja de datos )

Número de pieza KA3842
Descripción Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)
Fabricantes Wing Shing Computer Components 
Logotipo Wing Shing Computer Components Logotipo



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No Preview Available ! KA3842 Hoja de datos, Descripción, Manual

Linear Integrated Circuit
KA3842A
KA3842AM
CURRENTMODE PWM CONTROLLER
The KA3842A KA3842AM are fixe frequency current-mode
PWM controller. They are specially designed for OFFLine and DCtoDC converter
applications with minimal external components. These integrated circuits feature a
trimmed oscillator for precise duty cycle control, a temperature compensated reference,
high gain error amplifier, current sensing comparator, and a high current totempole
output ideally suited for driving a power MOSFET.
Protection circuity includes built undervoltage lockout and current limiting.
The
The
KKAA33884422AA,,KKAA3388442AAMM
haveoUpVerLaOtceathwnriethsihno1ld0s0%of
16 V(on) and 10
duty cycle The
V (off).
KA3842A
has
been
proven
in applications using the same external components as Motorola's parts,among others .The KA3842AM
has been optimized for compatibility with Samsung's parts Many applications can use either
KA3842A or KA3842AM The KA3842A KA3842AM have Start-Up Current 0,45 mA
FEATURES
Low Start-Up Current
Maximum Duty Cycle
U/V Lockout With Hysteresis
Operating Freguency Up To 500khz
BLOCK DIAGRAM
ordering
information
Device
KA3842AM
KA3842AMM
KA3842AN
KA3842AMN
Package
SO-8
SO-8
DIP-8
DIP-8
PIN CONNECTION
SO-8
DIP-8
Operating temperature
0 to +700C
"
"
"
Absolute Maximum Ratings
Characteristic
Supply Voltage
Output Current
Analog Inputs
Error Amp Output Sink Current
Power Dissipation (TA=250C)
Symbol
VCC
IO
VI
ISINK (E.A)
PO
Value
30
±1
0.3 to VCC
10
1
Unit
V
A
V
mA
W
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage: http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
1

1 page




KA3842 pdf
NOTE 2
85
14
F
–A–
–B–
L
–T–
SEATING
PLANE
H
C
J
N
DK
M
G
0.13 (0.005) M T A M B M
KA3842AN
KA3842AMN
Attention: M=10o
KA3842A/KA3842AM
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
MILLIMETERS
INCHES
DIM MIN MAX MIN MAX
A 9.40 10.16 0.370 0.400
B 6.10 6.60 0.240 0.260
C 3.94 4.45 0.155 0.175
D 0.38 0.51 0.015 0.020
F 1.02 1.78 0.040 0.070
G 2.54 BSC
0.100 BSC
H 0.76 1.27 0.030 0.050
J 0.20 0.30 0.008 0.012
K 2.92 3.43 0.115 0.135
L 7.62 BSC
0.300 BSC
M ––– 10_ ––– 10_
N 0.76 1.01 0.030 0.040
5

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