Texas Instruments UCC28084 Current Mode Push-Pull PWM With Programmable Slope Compensation UCC28084PW

The UCC28084PW is a BiCMOS pulse width modulation (PWM) controller designed for current-mode switching power supplies. It features programmable slope compensation, which enhances stability and performance in various applications. The device operates with a low start-up current of 120 ¬µA and a typical run current of 1.5 mA, making it suitable for energy-efficient designs. This controller supports a push-pull topology with a high-current totem-pole dual output stage, capable of driving 1 A sink and 0.5 A source currents. The oscillator frequency can be programmed from 50 kHz to 1 MHz using a single external component, allowing flexibility in design. The UCC28084PW includes cycle-by-cycle current limiting and an internal soft-start feature with a typical interval of 3.5 ms, which helps prevent inrush current during startup. The device is suitable for applications such as high-efficiency switch-mode power supplies, telecom DC-DC converters, and point-of-load power modules. It is available in an 8-pin TSSOP package and operates over a temperature range of -40¬8C to 85¬8C. The UCC28084PW also includes undervoltage lockout with hysteresis, ensuring reliable operation under varying input conditions.