UC3844BD1013TR PWM Controller – Current-Mode Fixed-Frequency SMPS Controller, High Stability, SOIC8

The UC3844BD1013TR is a current-mode PWM controller optimized for high-performance switching power supplies. Designed by STMicroelectronics, it provides precise duty-cycle control, fast transient response, and excellent line and load regulation.

Its low startup current and accurate internal oscillator make it ideal for offline AC-DC converters, DC-DC modules, and industrial power supplies. The device integrates essential control and protection functions to simplify power supply design while ensuring stable operation.

Key Specifications

• Control Mode: Current Mode PWM

• Duty Cycle: Up to 50%

• Supply Voltage: 12V – 30V (typical operation)

• Package: SOIC8

Applications

• AC-DC power supplies

• DC-DC converters

• Industrial SMPS

• Adapters and chargers

Features

• Precise current-mode control

• Low startup current

• Fast dynamic response

• Built-in protection circuitry