ISL6843IB

Power Supply Controllers, Monitors Overview

The ISL6843IB is a low-power Pulse-Width Modulation (PWM) controller from the ISL684x family, designed for boost and flyback topologies. It features an adjustable switching frequency up to 2 MHz and supports a maximum duty cycle of 96%. The device operates within a supply voltage range of 9 V to 16 V and delivers a 1 A output current. It functions reliably across an operating temperature range of -40°C to +105°C. Packaged in an 8-SOIC surface-mount case with a width of 3.90 mm, it draws a typical supply current of 5.5 mA.

Power Supply Controllers, Monitors Feature Summary

• Pin-compatible design with industry standard 384x family controllers
• Advanced BiCMOS architecture for improved performance
• Adjustable frequency operation for flexible power supply designs

Power Supply Controllers, Monitors Applications

• Boost converter implementations
• Flyback power supply architectures
• General-purpose PWM control systems

Power Supply Controllers, Monitors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for any updates to electrical characteristics or mechanical dimensions. Ensure storage conditions comply with humidity sensitivity requirements specified in the official documentation.

Power Supply Controllers, Monitors Selection Notes

Select this component when compatibility with legacy 384x designs is required alongside enhanced performance metrics. Consider the 2 MHz switching capability for smaller passive component sizes. Evaluate the 1 A drive strength against load requirements. Verify that the 8-SOIC package fits the target PCB layout constraints.

Power Supply Controllers, Monitors Part Context

The ISL6843IB belongs to the ISL684x series of adjustable frequency PWM controllers manufactured by Intersil, now part of Renesas Electronics. This family includes variants such as ISL6840, ISL6841, ISL6842, and ISL6844, offering similar core functionalities with slight variations in specific parameters or packaging options.

Power Supply Controllers, Monitors Replacement Considerations

Direct substitutes include other members of the ISL684x family, specifically ISL6840, ISL6841, ISL6842, and ISL6844, which share pin compatibility and architectural similarities.