LM5170QPHPRQ1

Overview

The LM5170QPHPRQ1 is an automotive-grade multiphase bidirectional current controller designed for high-power DC-DC conversion. It supports Buck, Boost, and Buck-Boost topologies with a maximum output current of 50 A. The device operates within a wide input voltage range of 4 V to 80 V and delivers an adjustable output voltage from 4 V to 80 V. It features a programmable switching frequency between 50 kHz and 500 kHz, with a maximum duty cycle of 99%. The component is housed in a 48-HTQFP package and is qualified to AEC-Q100 standards, ensuring reliable operation across an extended temperature range of -40°C to +150°C.

Feature Summary

• Supports multiphase bidirectional current control for flexible power flow management
• Enables synchronous rectification with phase interleaving for optimized efficiency
• Integrates comprehensive protection mechanisms including UVLO and power good signaling

Applications

• Dual-battery mild hybrid electric vehicle (mHEV) systems
• Automotive 12V/24V/48V bus power distribution networks
• Bidirectional battery charging and discharging controllers

Procurement Notes

Verify the specific suffix QPHPRQ1 against the official Texas Instruments datasheet to confirm the HTQFP-48 package and automotive qualification status. Ensure compatibility with required thermal dissipation solutions given the 150°C junction temperature rating. Confirm that the ordering information matches the exact pinout and electrical specifications defined in the manufacturer's documentation before finalizing procurement.

Selection Notes

Select this controller when designing systems requiring precise bidirectional current regulation between two voltage domains. It is suitable for applications demanding high efficiency through phase interleaving and synchronous rectification. Consider the 48-pin HTQFP package constraints for PCB layout. Verify that the external MOSFETs can handle the specified 50 A output current and that the switching frequency settings align with the magnetic component requirements.

Part Context

This component belongs to the LM5170 family of multiphase bidirectional current controllers. It shares functional similarities with other members like the LM5170QPHPTQ1 but differs in packaging and specific qualification details. The device is part of Texas Instruments' portfolio of automotive power management integrated circuits designed for robust performance in harsh environments.

Replacement Considerations

The LM5170QPHPTQ1 serves as a verified alternative within the same product family, offering identical core functionality. Both devices are automotive-qualified multiphase bidirectional controllers. Verify that the HTQFP-48 package dimensions and pin assignments remain compatible with the existing design footprint before substitution.

FAQ

What is the maximum operating junction temperature for the LM5170QPHPRQ1?

The maximum operating junction temperature is +150°C.

Does the LM5170QPHPRQ1 support synchronous rectification?

Yes, the device integrates synchronous rectification capabilities to improve efficiency.