UCC28220-Q1
www.ti.com SLUS789 – MARCH 2008 INTERLEAVED DUAL PWM CONTROLLER
WITH PROGRAMMABLE MAXIMUM DUTY CYCLE
FEATURES APPLICATIONS Qualified for Automotive Applications 2-MHz High-Frequency Oscillator With 1-MHz
Operation Per Channel Matched Internal Slope Compensation Circuits Programmable Maximum Duty Cycle Clamp
60% to 90% Per Channel Peak Current Mode Control With
Cycle-by-Cycle Current Limit Current Sense Discharge Transistor for
Improved Noise Immunity Accurate Line Undervoltage and Overvoltage
Sense With Programmable Hysteresis Opto-Coupler Interface Operates From 12-V Supply Programmable Soft-Start 1 2 High Output Current (50 A to 100 A)
Converters
Maximum Power Density Designs
High-Efficiency 48-V Input with Low-Output
Ripple Converters
High-Power Offline, Telecom, and Datacom
Power Supplies DESCRIPTION
The UCC28220 is a BiCMOS interleaved
dual-channel PWM controller. Peak current mode
control is used to ensure current sharing between the
two channels. A precise maximum duty cycle clamp
can be set to any value between 60% and 90% duty
cycle per channel. UCC28220 has an UVLO turn-on
threshold of 10 V for use in 12-V supplies. It has 8-V
turn-off threshold. …
