Texas Instruments TPS92624QPWPRQ1

Overview

TPS92624QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive four-channel high-side linear LED driver with external thermal sharing capability. It delivers up to 150 mA per channel with ±5% current accuracy over –40°C to +125°C ambient, supports 4.5 V to 40 V input, and integrates independent PWM dimming control and diagnostics for rear lamps, CHMSL, and interior lighting.

For engineers reviewing the TPS92624QPWPRQ1 datasheet, TPS92624QPWPRQ1 pinout, TPS92624QPWPRQ1 application, or TPS92624QPWPRQ1 equivalent, key selection factors include thermal sharing via RESx/OUTx dual-output architecture, fault bus configurability (one-fails-all-fail or N-1), diagnostic enable threshold adjustment, and 20-pin HTSSOP package with PowerPAD™ thermal pad.

Technical Context

The TPS92624QPWPRQ1 implements a high-side linear current regulation architecture where each channel independently regulates output current by maintaining 150 mV across its external sense resistor (R_SNSx). It uses dual output paths-OUTx and RESx-to dynamically allocate current between internal and external power dissipation based on supply-to-LED forward voltage headroom.

Its diagnostics include LED open-circuit detection (180–420 mV threshold), short-to-GND detection (0.855–1.26 V), auto-recovery fault handling, and thermal shutdown at 157–187°C junction temperature with 15°C hysteresis. The FAULT pin supports configurable fault bus operation across multiple TPS926xx-Q1 devices.

Key Specifications

Pinout & Package

The TPS92624QPWPRQ1 is housed in a 20-pin HTSSOP (PWP) package measuring 4.40 mm × 6.50 mm with exposed thermal pad (PowerPAD™) for enhanced thermal performance in automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side LED driver applications.

Compared with TPS92623QPWPRQ1 and TPS92630QPWPRQ1, the TPS92624QPWPRQ1 uniquely balances four-channel capability, wide 4.5–40 V operation, and external thermal sharing-making it optimal for mid-to-high-power automotive exterior lighting where thermal headroom and channel count are both critical.

Availability

TPS92624QPWPRQ1 is available at Aetrix Electronics and suitable for automotive rear lamps, CHMSL, door handle illumination, and overhead console lighting requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS92624QPWPRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with deep expertise in automotive-grade power management and signal chain solutions.

The TPS92624QPWPRQ1 belongs to TI's automotive LED driver product line, designed specifically for thermally demanding exterior and interior lighting applications requiring AEC-Q100 compliance, diagnostic coverage, and scalable channel integration.

FAQ

What is the maximum continuous output current per channel for the TPS92624QPWPRQ1?

The TPS92624QPWPRQ1 supports up to 150 mA total current per channel, distributed dynamically between the OUTx and RESx output terminals based on supply headroom and external resistor values. This rating is valid across the full operating ambient temperature range of –40°C to +125°C and maintains ±5% accuracy without derating.

How does thermal sharing work on the TPS92624QPWPRQ1?

Thermal sharing on the TPS92624QPWPRQ1 is implemented through dual current paths per channel: OUTx drives LEDs directly, while RESx routes current through an external shunt resistor to dissipate power externally. The device automatically adjusts the current split to maximize RESx usage when headroom is high, reducing die temperature rise and enabling higher sustained output in thermally constrained designs.

Can the TPS92624QPWPRQ1 operate with a 24 V truck battery system?

Yes, the TPS92624QPWPRQ1 supports input voltages from 4.5 V to 40 V, making it fully compatible with 24 V commercial vehicle battery systems. Its absolute maximum supply rating is 45 V, providing margin against load-dump transients common in heavy-duty automotive environments without requiring external protection circuitry.

What diagnostic functions does the TPS92624QPWPRQ1 provide?

The TPS92624QPWPRQ1 provides LED open-circuit detection (180–420 mV threshold), LED short-to-GND detection (0.855–1.26 V threshold), thermal shutdown (157–187°C), and fault bus signaling. All diagnostics feature auto-recovery with 125 µs deglitch timing, and the DIAGEN pin allows disabling open-circuit detection during low-dropout operation to prevent false triggers.

Is the TPS92624QPWPRQ1 pin-compatible with other devices in the TPS926xx-Q1 family?

No, the TPS92624QPWPRQ1 is not pin-compatible with other TPS926xx-Q1 devices such as TPS92623QPWPRQ1 or TPS92630QPWPRQ1. While they share functional similarities and fault bus interoperability, differences in channel count, pin assignment (e.g., missing IN4/PWM4 on TPS92623), and internal architecture require unique PCB layouts for each part number.