UC3843AD1R2 - onsemi

Manufacturer Part Number

UC3843AD1R2

Manufacturer

onsemi

Introduction

The UC3843AD1R2 is a high-performance, fixed-frequency, current-mode PWM controller designed for off-line and DC-to-DC power conversion applications.

Product Features and Performance

High-speed current-mode control

Fixed-frequency operation up to 500kHz

Undervoltage lockout with hysteresis

Oscillator frequency programmable with a single resistor

Cycle-by-cycle current limit

Slow-start/soft-start function

Shutdown/standby mode

Fault protection including output overvoltage and overcurrent

Product Advantages

Suitable for a wide range of power supply topologies

Excellent line and load regulation

Fast transient response

Low-power consumption in standby mode

Key Technical Parameters

Operating temperature range: -40°C to 150°C

Supply voltage range: 7.6V to 30V

Maximum duty cycle: 96%

Switching frequency: Up to 500kHz

Quality and Safety Features

RoHS non-compliant

8-SOIC package

Compatibility

The UC3843AD1R2 is compatible with a variety of power supply topologies, including boost, buck, flyback, and forward converters.

Application Areas

Off-line power supplies

DC-to-DC power conversion

Battery chargers

Industrial and consumer electronics

Product Lifecycle

The UC3843AD1R2 is an active product, and onsemi continues to manufacture and support it. Replacement options or upgrades may be available.

Key Reasons to Choose This Product

High-performance current-mode control for improved regulation and transient response

Wide operating voltage range and high-frequency capability

Comprehensive protection features for reliable operation

Compatibility with a variety of power supply topologies