UCC28070DWR Datasheet PDF - TI

●The UCC28070DWR is a 2-phase Interleaved CCM PFC Controller that integrates two pulse-width modulators (PWMs) operating 180° out of phase. This interleaved PWM operation generates substantial reduction in the input and output ripple currents and the conducted-EMI filtering becomes easier and less expensive. A significantly improved multiplier design provides a shared current reference to two independent current amplifiers that ensures matched average current mode control in both PWM outputs while maintaining a stable, low-distortion sinusoidal input line current. The UCC28070 contains multiple innovations including current synthesis and quantized voltage feed-forward to promote performance enhancements in PF, efficiency, THD and transient response. Features including frequency dithering, clock synchronization and slew rate enhancement further expand the potential performance enhancements.

● Interleaved average current-mode PWM control with inherent current matching

● Advanced current synthesizer current sensing for superior efficiency

● Programmable frequency (30 to 300kHz)

● Programmable maximum duty-cycle clamp

● Programmable frequency dithering rate and magnitude for enhanced EMI reduction

● External clock synchronization capability

● Enhanced load and line transient response through voltage amplifier output slew-rate correction

● Programmable peak current limiting

● Bias-supply UVLO, over-voltage protection, open-loop detection and PFC-enable monitoring

● External PFC-disable interface

● Open-circuit protection on VSENSE and VINAC pins

● Programmable soft-start

● Green product and no Sb/Br

●ESD sensitive device, take proper precaution while handling the device.