DESCRIPTION

The TK75005 is an 8-pin PWM controller suitable for both voltage-mode and current-mode control. It also has advanced features not available in controllers with a higher pin count. One such feature is a sawtooth current flowing out of the feedback pin (FB), which provides a slope compensation ramp (in current mode applications) in proportion to the resistance terminating that FB pin.

FEATURES

■ Can Be Used For Power Factor Correction/Line Harmonics Reduction to Meet IEC1000-3-2 Requirements

■ Maximum Duty Ratio 89 (typ.)

■ Low Standby Current for Current-Fed Start-Up

■ Current-Mode or Voltage-Mode Control

■ Internal User-Adjustable Slope Compensation

■ Pulse-by-Pulse Current Limiting

APPLICATIONS

■ Power Factor Correction Converters

■ Off-Line Power Supplies

■ Industrial Power Supplies

■ Off-Line Battery Charger