ISL6146AFRZ-T

Overview

The ISL6146AFRZ-T is a low voltage OR-ing FET controller from the Renesas ISL6146 family, designed for N+1 redundancy and load sharing in power distribution systems. It operates with supply voltages ranging from 3V to 20V and supports input voltages from 1V to 18V when paired with external bias. The device features an internal charge pump to drive N-channel MOSFETs, enabling efficient power OR-ing without diode losses. Key electrical parameters include a shutdown delay of 65 ns and a supply current of 25 µA. It is housed in an 8-DFN (3x3 mm) package with exposed pad and rated for operation between -40°C and +125°C.

Feature Summary

• Integrates a high-speed comparator for rapid reverse current fault isolation and smooth switching transitions.
• Includes an internal charge pump to fully drive N-channel power MOSFETs for improved efficiency.
• Offers user-programmable undervoltage lockout and adjustable OUT-V trip points via external resistors.

Applications

• N+1 Industrial and Telecom Power Distribution Systems
• Uninterruptible Power Supplies (UPS)
• Low Voltage Processor and Memory Storage Systems

Procurement Notes

Verify component authenticity through authorized Renesas distributors or certified partners. Confirm the specific suffix 'FRZ-T' indicates tape-and-reel packaging within the 8-DFN form factor. Check for recent Product Change Notifications regarding label updates or end-of-life status, as the broader ISL6146 family has undergone manufacturing changes. Ensure compatibility with system voltage requirements before integration.

Selection Notes

Select this model for applications requiring precise OR-ing control with minimal standby power consumption. The 8-DFN package suits space-constrained designs. Consider the ISL6146A variant if conduction monitoring is not required, or other family members if different enable logic or bias configurations are needed. Ensure the external MOSFET selection matches the controller's gate drive capabilities and thermal requirements.

Part Context

The ISL6146 series represents a family of OR-ing MOSFET controllers aimed at replacing traditional diode OR-ing solutions to enhance efficiency. The family includes variants like ISL6146A, B, C, D, and E, which differ in bias requirements, enable logic, and feature sets such as conduction monitoring. The ISL6146AFRZ-T specifically targets low-voltage operations with integrated charge pumping.

Replacement Considerations

Direct substitutes within the same package and function include ISL6146BFRZ and ISL6146EFRZ. For MSOP-8 packages, consider ISL6146AFUZ-T. Verify that any replacement maintains the same N-channel MOSFET drive capability and voltage range specifications.