UCC28517
FEATURES
D Provides Control of PFC and PWM Power
Stages In One Device
D Leading-Edge PFC, Trailing-Edge PWM
Modulation for Reduced Ripple
D Built-In Sequencing of PFC and PWM
Turn-On
D 2-A Source and 3-A Sink Gate Drive for Both
PFC and PWM Stages
D Typical 16-ns Rise Time and 7-ns Fall Time into 1-n F Loads
PFC Features
- Average-Current-Mode Control for Continuous Conduction Mode Operation
- Highly-Linear Multiplier for Near-Unity Power Factor
- Input Voltage Feedforward Implementation
- Improved Load Transient Response
- Accurate Power Limiting
- Zero Power Detect
PWM Features
- Peak-Current-Mode Control Operation
- 1:1 or 1:2 PFC:PWM Frequency Options
- Programmable maximum duty cycle
- Programmable Soft-Start
- Two Hysteresis Options for Differing
Hold-Up Time Requirements
DESCRIPTION
The UCC28510 series of bination PFC/PWM controllers provide plete control functionality for any off-line power system requiring pliance with the IEC1000- 3- 2 harmonic reduction requirements. By...
