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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)

DESCRIPTION

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 generator,

reduced overall supply current, and the addition of thermal

shutdown protection.

Along with these improvements, the UC1526A Series retains the

protective features of under-voltage lockout, soft-start, digital current

limiting, double pulse suppression logic, and adjustable

deadtime. For ease of interfacing, all digital control ports are TTL

compatible with active low logic.

Five volt (5V) operation is possible for “l(fā)ogic level” applications by

connecting VIN, VC and VREF to a precision 5V input supply. Consult

factory for additional information.