PRODUCT NAME

ICF KA384X

FUNCTIONAL DESCRIPTION

Current Mode PWM Controller

APPLICATIONS

Off - Line Converter

DC - to - DC Converter

GENERAL DESCRIPTION

The KA384X series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

FEATURES

Trimmed Oscillator for Precise Frequency Control

Oscillator Frequency Guaranteed at 250 kHz

Current Mode Operation to 500 kHz Output Switching Frequency

Output Deadtime Adjustable from 50% to 70%

Automatic Feed Forward Compensation

Latching PWM for Cycle−By−Cycle Current Limiting

Internally Trimmed Reference with Undervoltage Lockout

High Current Totem Pole Output

Undervoltage Lockout with Hysteresis

Low Startup and Operating Current

BLOCK DIAGRAM

ORDERING INFORMATION