Automotive two-phase interleaved continuous conduction(CCM) mode PFC controller

The UCC28070-Q1 is an advanced power factor

correction (PFC) controller that integrates two pulse-width modulators (PWMs)

operating interleaved by 180° in CCM boost-mode. Derived from the UCC28070, this

device can switch at frequencies from 30kHz up to 300kHz.

The 180° out-of-phase interleaved operation

results in substantial reduction of high-frequency input and output ripple currents

and conducted-EMI filtering becomes easier and less expensive.

The UCC28070-Q1 features multiple innovations

including current synthesis and quantized voltage feedforward to promote performance

enhancements in PF, efficiency, THD, and transient response. In addition, frequency

dithering, clock synchronization, and slew-rate enhancement further expand the

potential for performance improvements. Also, protection features include output

overvoltage detection, programmable peak-current limit, undervoltage lockout, and

open-loop protection.