UCC28C40DGKR

The UCCx8C4x series is a high-performance current-mode PWM controller. It is an enhanced BiCMOS version with pin-to-pin compatibility with the industry-standard UCx84xA series and UCx84x series PWM controllers. BiCMOS technology offers lower power consumption to improve efficiency and provides faster current sensing and oscillator frequency. Additionally, there are lower 7V start-up voltage versions, UCCx8C40 and UCCx8C41, for battery systems. The UCC28C4x series operates in a temperature range of –40°C to 125°C, and the UCC38C4x series operates in a temperature range of 0°C to 85°C. This series provides the necessary functions to control fixed-frequency, peak current-mode power supplies and offers the following performance advantages. The device supports high-frequency operation up to 1MHz, suitable for high-speed applications. Compared with the UCCx8C4x series, the trimmed discharge current allows for more precise programming of the maximum duty cycle and dead-time limits. Reducing the start-up and operating currents minimizes start-up losses and achieves the lowest possible operating power consumption, thereby improving efficiency. The device also features a fast 35ns current-sense-to-output delay time, providing excellent over-load protection for the power switch. It has a peak output current capability of ±1A and improved rise and fall times, enabling direct driving of large external MOSFETs. The UCCx8C4x series is available in 8-pin VSSOP (DGK) and 8-pin SOIC (D) packages.