ISL6146BFRZ-T7A

Overview

The ISL6146BFRZ-T7A is a low voltage OR-ing FET controller designed for N+1 redundancy and load sharing applications. It operates with supply voltages ranging from 3V to 20V and supports input voltages from 1V to 18V. The device utilizes an internal charge pump to drive N-channel MOSFETs, providing fast turn-off capabilities with a reverse current fault isolation time of less than 65 ns. It features user-programmable reverse voltage thresholds adjustable between 40mV and 800mV via an external resistor. The component is housed in an 8-lead DFN package measuring 3x3 mm.

Feature Summary

• Internal charge pump enables efficient driving of N-channel MOSFETs without external bootstrap components.
• Fast reverse current fault isolation ensures rapid protection against short circuits and back-feeding.
• User-programmable reverse voltage threshold allows customization of conduction monitoring sensitivity.
• Supports smooth switching transitions to minimize output voltage ripple during load sharing.

Applications

• N+1 redundant power distribution systems
• Telecommunications and datacom power supplies
• Uninterruptible power supply (UPS) modules

Procurement Notes

Verify the specific suffix T7A indicates tape and reel packaging configuration when sourcing. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Check end-of-life notifications as this family may have discontinuation notices. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this part for applications requiring precise load balancing among parallel power sources. The 3V to 20V supply range suits various logic levels and bus architectures. Consider the 8-DFN package for space-constrained designs. Evaluate the programmable threshold range against system-specific fault detection needs.

Part Context

This component belongs to the ISL6146 series of OR-ing controllers, which includes variants like ISL6146A, ISL6146C, and ISL6146D. These devices share core functionalities but differ in features such as enable pin polarity, overvoltage protection inputs, and conduction reporting capabilities. The ISL6146B variant specifically offers separate BIAS and VIN connections with active high enable functionality.

Replacement Considerations

Direct substitutes within the same family include ISL6146AFUZ-T, ISL6146BFRZ-TK, and ISL6146DFRZ. Verify package compatibility and feature set alignment before substitution. Cross-reference datasheets for differences in enable logic or monitoring outputs.