KA3842 Wing Shing Computer Components, KA3842 Datasheet

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KA3842

Manufacturer Part Number
KA3842
Description
Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)
Manufacturer
Wing Shing Computer Components
Datasheet

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in applications using the same external components as Motorola's parts,among others .The
has been optimized for compatibility with Samsung's parts Many applications can use either
CURRENT MODE PWM CONTROLLER
The KA3842A
PWM controller. They are specially designed for OFF Line and DC to DC 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 under voltage lockout and current limiting.
The
FEATURES
The KA3842A ,KA384AM
KA3842A or KA3842AM
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage:
BLOCK DIAGRAM
Absolute Maximum Ratings
Supply Voltage
Output Current
Analog Inputs
Error Amp Output Sink Current
Power Dissipation (T
Low Start-Up Current
Maximum Duty Cycle
U/V Lockout With Hysteresis
Operating Freguency Up To 500khz
KA3842A,KA3842AM
http://www.wingshing.com
Characteristic
KA3842AM
A
=25
The KA3842A
0
have UVLO thresholds of 16 V(on) and 10 V (off).
C)
are fixe frequency current-mode
operate
can
within 100%
KA3842AM
Linear Integrated Circuit
I
Symbol
SINK (E.A)
V
P
I
V
CC
O
O
I
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: wsccltd@hkstar.com
duty cycle
have Start-Up Current 0,45 mA
0.3 to V
Value
The KA3842A has been proven
30
10
1
1
KA3842AMM
KA3842AMN
KA3842AN
KA3842AM
ordering
information
Device
CC
Unit
mA
W
V
A
V
Package
KA3842AM
SO-8
DIP-8
DIP-8
SO-8
PIN CONNECTION
Operating temperature
0 to +70
KA3842A
KA3842AM
"
"
"
SO-8
DIP-8
0
C
1

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KA3842 Summary of contents

Page 1

... Error Amp Output Sink Current 0 Power Dissipation (T = Wing Shing Computer Components Co., (H.K.)Ltd. Homepage: http://www.wingshing.com Linear Integrated Circuit can duty cycle within 100% The KA3842A has been proven have Start-Up Current 0,45 mA KA3842AM ordering information Device KA3842AM KA3842AMM KA3842AN KA3842AMN Symbol Value V ...

Page 2

... SINK SINK I = 200 mA SINK 1nF (Note 1nF (Note 0. KA3842A/KA3842AM +70 C, unless A Min Typ Max 4.9 5.0 5.1 6.0 20 6.0 25 -100 -180 0.05 1.0 1.6 -0.1 -2 2.42 2.5 2. -0.5 -1 ...

Page 3

... Pad Location Pad Chip size: 2.38 x 1.63 mm Pad Coordinates 110 5 1050 110 6 1310 110 2000 150 KA3842A/KA3842AM Coordinates 1680 1450 1310 1410 815 1410 460 1390 ...

Page 4

... D and F do not include mold flash or protrusions. Mold flash or potrusions shall not exceed 0.15mm (.006inch). inch OUTLINE AND TYP. MAX. MECHANICAL DATA 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.197 0.244 0.050 0.150 0.157 0.050 0.024 4 KA3842A/KA3842AM KA3842AM KA3842AMM SO8 ...

Page 5

... M KA3842AN KA3842AMN Attention: M=10 NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN 2. PACKAGE CONTOUR OPTIONAL (ROUND OR 3. DIMENSIONING AND TOLERANCING PER ANSI KA3842A/KA3842AM FORMED PARALLEL. SQUARE CORNERS). Y14.5M, 1982. MILLIMETERS INCHES DIM MIN MAX MIN MAX A 9.40 10.16 0.370 0.400 B 6.10 6.60 ...

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