Applications

Datasheet

ISL78841ASRH
Radiation Hardened, High Performance Industry Standard Single-Ended Current Mode PWM Controller

Typical Diagram

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Key Features

    • Electrically Screened to DLA SMD # 5962-07249
    • QML Qualified Per MIL-PRF-38535 Requirements
    • 1A MOSFET Gate Driver
    • 90µA Typical Start-up Current, 125µA Max
    • 35ns Propagation Delay Current Sense to Output
    • Fast Transient Response with Peak Current Mode Control
    • 9V to 13.2V Operation
    • Adjustable Switching Frequency to 1MHz
    • 50ns Rise and Fall Times with 1nF Output Load
    • Trimmed Timing Capacitor Discharge Current for Accurate Deadtime/Maximum Duty Cycle Control
    • 1.5MHz Bandwidth Error Amplifier
    • Tight Tolerance Voltage Reference Over Line, Load and Temperature
    • ±3% Current Limit Threshold
    • Pb-Free Available (RoHS Compliant)

Description

The ISL7884xASRH is a high performance, radiation hardened drop-in replacement for the popular 28C4x and 18C4x PWM controllers suitable for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Its fast signal propagation and output switching characteristics make this an ideal product for existing and new designs.

Features include up to 13.2V operation, low operating current, 90µA typical start-up current, adjustable operating frequency to 1MHz, and high peak current drive capability with 50ns rise and fall times.

Specifications for Rad Hard QML devices are controlled by the Defense Logistics Agency Land and Maritime (DLA). The SMD numbers listed in the ordering information must be used when ordering.

Detailed Electrical Specifications for the ISL788xASRH are contained in
SMD 5962-07249. A "hot-link" is provided on our website for downloading.

Applications

    • Current Mode Switching Power Supplies
    • Isolated Buck and Flyback Regulators
    • Boost Regulators
    • Direction and Speed Control in Motors
    • Control of High Current FET Drivers

Design Tip

Are the Schottky clamp diodes required on the outputs when not driving MOSFETs?

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