UCC3808D-1

The UCC3808D-1 from Texas Instruments is a BiCMOS push-pull pulse-width modulator designed for high-speed, low-power applications. It integrates the necessary control and drive circuitry for offline or DC-to-DC fixed-frequency current-mode switching power supplies, minimizing external component count.

This controller features a push-pull topology with a maximum duty cycle of 50%. It operates within a voltage range of 8.3V to 14V and can achieve frequencies up to 1MHz. Key internal features include an error amplifier with a 2MHz gain bandwidth product, on-chip VDD clamping, and internal soft-start functionality. The output drive stages are capable of 500mA peak source current and 1A peak sink current.

The UCC3808D-1 is available in an 8-SOIC package, designed for surface mount applications. Its operating temperature range is -55°C to 150°C (TJ). The device offers features like frequency control and isolated output, making it suitable for various power conversion designs.

This component is part of the UCCx808-x family, known for its high-speed and low-power characteristics. The dual output drive stages operate in a push-pull configuration, switching at half the oscillator frequency. The dead time between outputs is typically 60ns to 200ns, ensuring each output stage duty cycle remains below 50%.