UCC28521 Description
The UCC28521 and UCC28528 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 bining the control and drive signals for the PFC and the PWM stages into a single device, significant performance and cost benefits are gained. Based on the UCC28511, the new devices employ an average current mode control...
UCC28521 Key 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
- Peak-Current-Mode Control Operation
- 1:1 PFC:PWM Frequency Option
- Programmable maximum Duty Cycle Limit
- Programmable Soft-Start