The ISL6840, ISL6841, ISL6842, ISL6843, ISL6844,

ISL6845 family of adjustable frequency, low power, pulse

width modulating (PWM) current mode controllers is

designed for a wide range of power conversion applications

including boost, flyback, and isolated output configurations.

Peak current mode control effectively handles power

transients and provides inherent overcurrent protection.

This advanced BiCMOS design is pin compatible with the

industry standard 384x family of controllers and offers

significantly improved performance. Features include low

operating current, 60μA start-up current, adjustable

operating frequency to 2MHz, and high peak current drive

capability with 20ns rise and fall times.

特性 Features

? 1A MOSFET Gate Driver

? 60μA Start-up Current, 100μA Maximum

? 25ns Propagation Delay Current Sense to Output

? Fast Transient Response with Peak Current Mode Control

? Adjustable Switching Frequency to 2MHz

? 20ns Rise and Fall Times with 1nF Output Load

? Trimmed Timing Capacitor Discharge Current for Accurate

Deadtime/Maximum Duty Cycle Control

? High Bandwidth Error Amplifier

? Tight Tolerance Voltage Reference Over Line, Load, and

Temperature

? Tight Tolerance Current Limit Threshold

? Pb-Free Available (RoHS Compliant)

Applications

? Telecom and Datacom Power

? Wireless Base Station Power

? File Server Power

? Industrial Power Systems

? PC Power Supplies

? Isolated Buck and Flyback Regulators

? Boost Regulators