85515022A

调整脉冲宽度调制器 Regulating Pulse Width Modulator

DESCRIPON

The UC1526A Series are improved-performance pulse-width modulator circuits intended for direct replacement of equivalent non- “A” versions in all applications. Higher frequency operation has been enhanced by several significant improvements including: a more accurate oscillator with less minimum dead time, reduced circuit delays particularly in current limiting, and an improved output stage with negligible cross-conduction current. Additional improvements include the incorporation of a precision, band-gap reference gener ator, reduced overall supply current, and the addition of thermal shutdown protection.

FEATURES

• Reduced Supply Current

• Oscillator Frequency to 600kHz

• Precision Band-Gap Reference

• 7 to 35V Operation

• Dual 200mA Source/Sink Outputs

• Minimum Output Cross-Conduction

• Double-Pulse Suppression Logic

• Under-Voltage Lockout

• Programmable Soft-Start

• Thermal Shutdown

• TTL/CMOS Compatible Logic Ports

• 5 Volt Operation VIN= VC= VREF= 5.0V