1FEATURES

2· 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

APPLICATIONS

· 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.

Additional features include a programmable internal

slope compensation with a special circuit that ensures

exactly the same slope is added to each channel.

The UCC28220 is available in a 16-pin low-profile

TSSOP package.