ISL8842AAUZ

AC DC Converters, Offline Switchers Overview

The ISL8842AAUZ is a single-ended current mode PWM controller from the Renesas ISL884xA series, designed as a drop-in replacement for legacy 28C4x and 18C4x controllers. It operates with a 30V supply range and features a 1A peak gate driver output. The device supports adjustable switching frequencies up to 2MHz and includes a low 90µA start-up current. Key electrical characteristics include a maximum duty cycle of 96%, a 14.4V UVLO threshold, and operation within a temperature range of -40°C to +105°C. It is housed in an 8-lead MSOP package.

AC DC Converters, Offline Switchers Feature Summary

• Implements peak current mode control with fast transient response and tight tolerance voltage reference.
• Features high peak current drive capability with 20ns rise and fall times for efficient MOSFET switching.
• Includes trimmed timing capacitor discharge current for accurate deadtime and maximum duty cycle control.

AC DC Converters, Offline Switchers Applications

• Telecom and datacom power supplies
• Wireless base station power systems
• File server power units
• Industrial power systems

AC DC Converters, Offline Switchers Procurement Notes

Verify component authenticity through authorized channels due to discontinuation status. Confirm package integrity upon receipt. Validate datasheet revisions against design requirements. Ensure storage conditions comply with moisture sensitivity levels. Cross-reference pinouts with legacy equivalents before integration.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for designs requiring direct compatibility with older 28C4x or 18C4x architectures without PCB layout changes. Consider the 2MHz frequency limit and 1A drive strength for specific transformer and MOSFET combinations. Evaluate thermal performance within the specified operating range for the target application environment.

AC DC Converters, Offline Switchers Part Context

Part of the ISL884xA family, which provides high-performance alternatives to industry-standard PWM controllers. This series targets applications needing fast signal propagation and precise current mode control. The family supports various topologies including boost, flyback, and isolated configurations.

AC DC Converters, Offline Switchers Replacement Considerations

Direct drop-in replacements exist within the ISL884xA series, such as the ISL8840A and ISL8841. Verify pinout compatibility and electrical specifications against the original design constraints before substitution.

AC DC Converters, Offline Switchers FAQ

What is the maximum switching frequency supported by the ISL8842AAUZ?

The device supports an adjustable switching frequency up to 2MHz.

Does the ISL8842AAUZ have an internal switch?

No, it is a controller that requires an external MOSFET driven by its 1A gate driver output.