KA3842A Datasheet, PDF (1/5 Pages) Wing Shing Computer Components – Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)

Linear Integrated Circuit
KA3842A
KA3842AM
CURRENT−MODE PWM CONTROLLER
The KA3842A _KA3842AM are fixe frequency current-mode
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
The
K^KA^A3³8⁸4⁴2²A^A,,^KK^AA³3⁸8⁴4²A^AM^M
haveoUpVerLaOt_ceath_wnr_ie_ths_ih_no₁ld₀s_0%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 (T_A=25⁰C)
Symbol
V_CC
I_O
V_I
I_{SINK (E.A)}
P_O
Value
30
±1
−0.3 to V_CC
10
1
Unit
V
A
V
mA
W
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage: http://www.wingshing.com
Tel:[phone] Fax:[phone]
E-mail: [e-mail]
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