The UCC28070APW is a two-phase interleaved current-mode Power Factor Correction (PFC) Controller with extended frequency range capable of operating at low switching frequencies desired for IGBT power-switch based PFC converters in high-power applications. Thus extending the range of operation compared to the UCC28070 device whose minimum operating frequency was limited to 30kHz. The 180° out-of-phase interleaved operation generates substantial reduction in input and output ripple currents and conducted EMI filtering becomes easier and less expensive. It also features 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
Highly-linear multiplier output with internal
Quantized voltage feed-forward correction for near-unity PF
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, overvoltage protection, open-loop detection and PFC-enable monitoring
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