UC3843BVDR2G - onsemi

Manufacturer Part Number

UC3843BVDR2G

Manufacturer

onsemi

Introduction

The UC3843BVDR2G is a high-performance fixed-frequency current-mode controller designed for DC to DC switching power supply applications.

Product Features and Performance

Current-mode operation for improved transient response, line regulation, and load regulation

High-performance control circuitry for power efficiency

Frequency operation up to 500kHz allowing smaller transformer size

96% maximum duty cycle for a wide range of duty cycle operations

Positive output configuration with the capability for isolation designs

Boost and flyback topology suitable for step-up and step-down applications

Single output with one output phase

Operating voltage range from 7.6V to 30V suitable for a variety of supply voltages

Supports high-temperature operation from -40°C to +105°C

Product Advantages

Optimized for high-frequency operation reducing the size of passive components

High duty cycle capability providing flexibility in design

Integrated features reduce external component count and system complexity

Robust thermal performance for reliability in various environments

Key Technical Parameters

Supply Voltage (Vcc/Vdd): 7.6V ~ 30V

Switching Frequency: Up to 500kHz

Duty Cycle (Max): 96%

Output Type: Transistor Driver

Function: Step-Up, Step-Up/Step-Down

Number of Outputs: 1

Output Phases: 1

Operating Temperature Range: -40°C ~ 105°C (TA)

Quality and Safety Features

Built-in thermal shutdown for protection from overheating

Under-voltage lockout for safe operation during power-up, power-down, and brown-out conditions

Compatibility

Compatible with a broad range of inductors and capacitors for design flexibility

Surface Mount 14-SOIC package suitable for compact PCB layout

Compatible with standard reflow and soldering processes

Application Areas

Switching power supplies

DC-DC converters for industrial and telecommunications

Power supplies for battery-operated devices

Isolated and non-isolated power systems

Product Lifecycle

Active product indicating continuous manufacturing and support

No indication of nearing discontinuation at the knowledge cutoff

Potential availability of replacements or upgrades within onsemi's product range

Several Key Reasons to Choose This Product

Highly flexible for various topologies including boost and flyback circuits

Can be used in both isolated and non-isolated power supply designs

Suitable for high-frequency applications facilitating miniaturization of components

High max duty cycle enabling efficient power conversion

Wide operating temperature range enhancing system reliability

Industry-standard packaging and pinouts for ease of integration

Current-mode control provides excellent system response to load variations

Manufactured by onsemi, a reputable supplier in the semiconductor industry