Datasheet Texas Instruments UCC28060DG4 — 数据表

UCC2 8060 UCC28060
www.ti.com . SLUS767E – MAY 2007 – REVISED NOVEMBER 2008 Natural Interleaving™ DUAL-PHASE TRANSITION-MODE PFC CONTROLLER
NATURAL INTERLEAVING FEATURES SYSTEM FEATURES Easy Phase Management Facilitates
Compliance to Light-Load Efficient Standards FailSafe OVP with Dual Paths Prevents Output
Over-voltage Conditions Caused by
Voltage-Sensing Failures Sensorless Current Shaping Simplifies Board
Layout and Improves Efficiency Inrush Safe Current Limiting:
– Prevents MOSFET conduction during
inrush
– Eliminates reverse recovery events in
output rectifiers 1 234 85-265VAC EMI
Filter 400 VDC
-Cost Savings
Improved Efficiency and Design Flexibility
over Traditional, Single-Phase Continuous
Conduction Mode (CCM)
Input Filter and Output Capacitor Current
Cancellation:
– Reduced current ripple for higher system
reliability and smaller bulk capacitor
– Reduced EMI filter size
Enables Use of Low-Cost Diodes without
Extensive Snubber Circuitry …