Provides Control of PFC and PWM Power Stages In One Device
Leading-Edge PFC, Trailing-Edge PWM Modulation for Reduced Ripple
Built-In Sequencing of PFC and PWM Turn-On
2-A Source and 3-A Sink Gate Drive for Both PFC and PWM Stages
Typical 16-ns Rise Time and 7-ns Fall Time into 1-nF 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 combination PFC/PWM controllers provide complete control functionality for any off-line power system requiring compliance with the IEC100032 harmonic reduction requirements. By combining the control and drive signals for the PFC and the PWM stages into a single device, significant performance and cost benefits are gained. By managing the modulation mechanisms of the two stages (leading-edge modulation for PFC and trailing-edge modulation for PWM), the ripple current in the boost capacitor is minimized.
Based on the average current mode control architecture with input voltage feedforward of prior PFC/PWM combination controllers, these devices offer performance advantages. Two new key PWM features are programmable maximum duty cycle and the 2x PWM frequency options to the base PFC frequency.
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
Inventory
Reported Distributor Inventory as of 9:50 AM GMT, 22 Nov 2009
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.
If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.