Texas Instruments UC1844A Current Mode PWM Controller UC1844AJ883B

The UC1844A Current Mode PWM Controller from Texas Instruments is designed for off-line and DC-DC converter applications. It features a low start-up current of less than 0.5mA and a trimmed oscillator discharge current of 8.3mA. The device includes automatic feedforward compensation, pulse-by-pulse current limiting, and enhanced load response characteristics. It also has undervoltage lockout with hysteresis and double pulse suppression capabilities. The controller operates at frequencies up to 500kHz and is suitable for various applications, including switch mode power supplies, power modules, and industrial power supply units. The UC1844A is available in an 8-pin CDIP package and is rated for operation in a temperature range of -55 to 125 degrees Celsius.