• Product Introduction

UCC28510DW Advanced PFC/PWM combo controller

illustrate   The combined PFC/PWM controller UCC28510 series provides any off-line power required with IEC1000-3-2 harmonics to reduce the full control functionality of the system. By combining into a single device, significant performance and cost advantages of the PFC and PWM stages of control and drive signals are benefits. The ripple current is minimized at the boost capacitor through a mechanism that manages the two stages of modulation (for PFC-leading modulation and PWM modulation for trailing edge). Based on the average current mode control architecture, the input voltage is pre-fed by the PFC/PWM combined controller, which these devices offer performance benefits. The two new main features are programmable PWM maximum duty cycle and the option of 2 PWM frequencies for base PFC.   characteristic   PFC and PWM power stages are provided in one device Leading PFC, trailing edge PWM modulation reduces ripple Built-in PFC and PWM sequencing steering up 2, source and 3 sinks are suitable for PFC and PWM gate drives in both stages A typical rise time of 16-ns and a fall time of 7 ns is a load of 1-NF Features of PFC: Continuous on-mode operation controlled by average current mode High linear multiplier power factor of nearly 1 Input voltage feedforward implementation Improved load transient response Precise power limits Zero power detection Features of PWM: Peak current mode controls operation PFC:PWM frequency options for 1:1 or 1:2 Programmable maximum duty cycle Programmable soft start Two different hold time requirements hysteresis options