The ISL6740, ISL6741 family of adjustable frequency, low

power, pulse width modulating (PWM) voltage mode (ISL6740)

and current mode (ISL6741) controllers is designed for a wide

range of power conversion applications using half-bridge, full

bridge, and push-pull configurations. These controllers provide

an extremely flexible oscillator that allows precise control of

frequency, duty cycle, and deadtime.

This advanced BiCMOS design features low operating current,

adjustable switching frequency up to 1MHz, adjustable softstart, internal and external over-temperature protection, fault

annunciation, and a bidirectional SYNC signal that allows the

oscillator to be locked to paralleled units or to an external

clock for noise sensitive applications.

Features

• Precision Duty Cycle and Deadtime Control

• 95µA Start-up Current

• Adjustable Delayed Overcurrent Shutdown and Re-start

(ISL6740)

• Adjustable Short Circuit Shutdown and Re-start

• Adjustable Oscillator Frequency Up to 2MHz

• Bidirectional Synchronization

• Inhibit Signal

• Internal Over-Temperature Protection

• System Over-Temperature Protection Using a Thermistor or

Sensor

• Adjustable Soft-start

• Adjustable Input Undervoltage Lockout

• Fault Signal

• Tight Tolerance Voltage Reference Over Line, Load, and

Temperature

• Pb-Free Available (RoHS Compliant)

Applications

• Telecom and Datacom Power

• Wireless Base Station Power

• File Server Power

• Industrial Power Systems

• DC Transformers and Buss Regulators