Texas Instruments TPS92623QPWPRQ1

Overview

TPS92623QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive three-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, supports independent PWM dimming (≥100 Hz), and features low dropout voltage (≤600 mV at 150 mA) for rear lamp and CHMSL applications.

For engineers reviewing the TPS92623QPWPRQ1 datasheet, TPS92623QPWPRQ1 pinout, TPS92623QPWPRQ1 application, or TPS92623QPWPRQ1 equivalent, this page provides verified technical context, thermal-sharing design implications, fault-bus configuration options (one-fails–all-fail vs. N-1), and real-world current distribution behavior across OUTx/RESx paths under varying supply and LED forward voltage conditions.

Technical Context

The TPS92623QPWPRQ1 implements a dual-path high-side current regulation architecture per channel: one path through OUTx (direct LED anode connection), another through RESx (external shunt resistor for thermal power offloading). Current is regulated by maintaining 150 mV across each external R(SNSx) sense resistor, with dynamic redistribution between OUTx and RESx based on available headroom - maximizing RESx current when V(SUPPLY) − V(LED) is large, shifting to OUTx dominance near dropout.

Its diagnostics include auto-recovering LED open-circuit detection (180–420 mV threshold), short-to-GND detection (0.855–1.26 V), configurable FAULT bus operation (one-fails–all-fail or N-1), and thermal shutdown at 157–187°C with 15°C hysteresis. The device operates from 4.5 V to 40 V and consumes only 0.21–0.45 mA in fault mode with FAULT pulled low.

Key Specifications

Pinout & Package

TPS92623QPWPRQ1 is housed in a 16-pin HTSSOP (PWP) package with 4.40 mm × 5.00 mm body size and exposed thermal pad for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS92623QPWPRQ1, the TPS92622QPWPRQ1 reduces channel count while preserving thermal sharing and diagnostics - ideal for cost-sensitive dual-zone designs; the TPS92630QPWPRQ1 replaces linear regulation with switch-mode operation, trading silicon area and EMI complexity for significantly lower power dissipation at high currents.

Availability

TPS92623QPWPRQ1 is available at Aetrix Electronics and suitable for automotive exterior lighting, interior ambient lighting, and EV charging indicator systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for TPS92623QPWPRQ1 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 leadership in automotive-grade power management and LED driver ICs.

The TPS926xx-Q1 product line is designed specifically for automotive exterior and interior LED lighting systems, emphasizing thermal resilience, functional safety diagnostics, and robust operation across wide battery voltage ranges.

FAQ

What is the maximum current per channel for the TPS92623QPWPRQ1?

The TPS92623QPWPRQ1 delivers up to 150 mA per channel with ±5% accuracy over the full operating temperature range of –40°C to +125°C. This current is regulated by maintaining a 150 mV drop across each external R(SNSx) sense resistor. The device dynamically splits this current between the OUTx and RESx outputs based on available headroom, ensuring stable LED drive even as supply voltage or LED forward voltage varies.

How does thermal sharing work on the TPS92623QPWPRQ1?

Thermal sharing on the TPS92623QPWPRQ1 is implemented via dual-output paths per channel: OUTx (direct LED anode connection) and RESx (current path through external shunt resistor). The device regulates total current (e.g., 150 mA) across both paths, directing up to 95% through RESx when headroom is large - thereby offloading power dissipation from the die. This reduces junction temperature rise and enables higher sustained output in thermally constrained layouts.

Can the TPS92623QPWPRQ1 support one-fails–all-fail fault bus configuration?

Yes, the TPS92623QPWPRQ1 supports configurable fault bus operation via its open-drain FAULT pin. When multiple TPS92623QPWPRQ1 devices (or compatible drivers like TPS9261x-Q1 or TPS92830-Q1) have their FAULT pins tied together with a pull-up resistor, the bus asserts low if any device detects a fault - enabling one-fails–all-fail behavior. Alternatively, the FAULT pin can be used individually for N-1 operation where only the faulty channel shuts down.

What is the dropout voltage specification for the TPS92623QPWPRQ1?

The TPS92623QPWPRQ1 has a maximum dropout voltage of 600 mV at 150 mA output current and 400 mV at 100 mA, measured from INx to OUTx with RESx open. This low dropout enables reliable operation even during automotive cold-crank events (down to ~6 V) when driving typical red/amber LED strings with forward voltages of 2–3 V per LED. Dropout increases slightly when current is routed through RESx due to added shunt resistance.

Does the TPS92623QPWPRQ1 include diagnostics for LED open and short circuits?

Yes, the TPS92623QPWPRQ1 integrates auto-recovering diagnostics for both LED open-circuit (180–420 mV detection threshold) and LED short-to-GND (0.855–1.26 V threshold) faults. Each channel monitors both OUTx and RESx voltages independently. Upon fault detection, the device disables the affected channel, initiates a retry sequence with 0.64–1.53 mA current, and resumes normal operation once the fault clears - all without host MCU intervention.