UC3844 SMD SOP-8 - Current Mode PWM Controller IC [Original]

The UC3844 is a high-performance, fixed-frequency PWM controller IC designed for current-mode control applications. It offers enhanced stability, efficiency, and precision in power supply circuits. With a fixed operating frequency of 52kHz, built-in under-voltage lockout (UVLO), and leading-edge blanking, the UC3844 is widely used in switch-mode power supplies (SMPS), DC-DC converters, and industrial power management applications.

Key Features & Benefits

• Current-mode PWM control for improved stability and response

• Fixed operating frequency of 52kHz for consistent performance

• Low start-up and operating current for energy-efficient designs

• Under-voltage lockout (UVLO) with hysteresis for system protection

• Internal leading-edge blanking for noise reduction

• Optimized for offline and DC-DC converter applications

• Compact SMD SOP-8 package for space-efficient PCB designs

Specifications

• IC Type: Current Mode PWM Controller

• Operating Frequency: 52kHz (Fixed)

• Operating Voltage: 7.6V - 30V

• Start-up Current: <1mA

• Operating Current: 17mA (Typical)

• Output Voltage: 5V

• Package Type: SMD SOP-8

• Operating Temperature Range: -40°C to +85°C

Applications

• Switch Mode Power Supplies (SMPS)

• DC-DC Converters

• Industrial Power Management

• Battery Chargers and Power Adapters

• Motor Drive Controllers