资 源 简 介
The UCC28070 is an advanced power factor correcTIon device 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.
