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UC3842B Datasheet(PDF) 1 Page - Unisonic Technologies

Part No. UC3842B
Description  HIGH PERFORMANCE CURRENT MODE CONTROLLERS
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Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3842B Datasheet(HTML) 1 Page - Unisonic Technologies

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UTCUC3842B/3843B LINEARINTEGRATEDCIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R103-012,A
HIGH PERFORMANCE CURRENT
MODE CONTROLLERS
DESCRIPTION
The UTC UC3842B/3843B are specifically designed for
Off-Line and dc-to-dc converter applications offering the
designer a cost-effective solution with minimal external
components.
The UC3842B has UVLO thresholds 16V (on) and 10V(off),
ideally suited for off-line converters. The UC3843B is tailored
for lower voltage applications having UVLO thresholds of
8.5V(on) and 7.6V(off).
FEATURES
*Trimmed Oscillator for Precise Frequency Control
*Oscillator Frequency Guaranteed at 250kHz
*Current Mode Operation to 500kHz
*Automatic Feed Forward Compensation
*Latching PWM for Cycle-By-Cycle Current Limiting
*Internally Trimmed Reference with Undervoltage Lockout
*High Current Totem Pole Output
*Undervoltage Lockout with Hysteresis
*Low Startup and Operating Current
DIP-8
SOP-8
BLOCK DIAGRAM


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