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UC3845 Datasheet PDF

Part Series:UC3845 Series
Category:Voltage Regulators
Description:UC3845BD1R2G, PWM Current Mode Controller, 1A, 250kHz, 36V, 8Pin SOIC
Document:UC3845N Datasheet PDF (56 Pages)

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UC3845BD1R2G - ON Semiconductor Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Frequency
250 kHz
Number of Pins
8 Pin
Supply Voltage (DC)
12.0V (min)
Case/Package
SOIC-8
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UC3845BD1R2G - ON Semiconductor Function Overview

The UC3845BD1R2G is a high-performance fixed frequency current-mode Pulse Width Modulation (PWM) Controller specifically designed for off-line and DC to DC converter applications offering the designer a cost-effective solution with minimal external components. It features an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, a latch for single pulse metering and a flip-flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50 to 70%.
Trimmed oscillator for precise frequency control
Automatic feed forward compensation
Internally trimmed reference with undervoltage lockout
High current totem pole output
Undervoltage lockout with hysteresis
Low startup and operating current
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