Texas Instruments TPS92629QDGNRQ1

Overview

TPS92629QDGNRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive single-channel high-side linear LED driver with thermal sharing control, delivering up to 250 mA output current, ±5% PWM dimming accuracy over –40°C to +125°C, and 4.5 V to 40 V input voltage range - used in exterior blind spot indicators and interior overhead consoles.

For engineers reviewing the TPS92629QDGNRQ1 datasheet, TPS92629QDGNRQ1 pinout, TPS92629QDGNRQ1 application, or TPS92629QDGNRQ1 equivalent, key selection factors include its dual-path thermal sharing (OUT/RES), multi-fault reporting via FAULT pin voltage levels, analog dimming slew rate optimization for EMC in long-wire driving, and integrated diagnostics for LED open/short-to-GND/short-to-battery with auto-recovery.

Technical Context

The TPS92629QDGNRQ1 implements a high-side linear current regulator architecture with dual-output current paths (OUT and RES) dynamically apportioning load based on supply-to-LED forward voltage headroom. It uses external R_SNS for current setting and regulates V_{CS_REG} at 463.5 mV (typ) to achieve precise current control.

Its diagnostic subsystem employs voltage-threshold detection (e.g., 180–420 mV for LED open, 1.425–1.575 V for short-to-GND) with deglitch timing (125 µs), fault recovery (50 µs), and multi-level FAULT pin reporting (0.61 V for STG, 1.11 V for STB, 1.83 V for OPEN, 2.80 V for TSD). Thermal shutdown triggers at 172°C (typ) with 15°C hysteresis.

Key Specifications

Pinout & Package

HVSSOP-8 (DGN) package, 3 mm × 3 mm body size, PowerPAD™ 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 TPS92629QDGNRQ1, the TPS92630QDGNTQ1 offers channel scalability without sacrificing per-channel precision or diagnostics, while the MAX20051BATP/V+T trades thermal sharing and fault resolution for lower standby power and cost - making it viable only in thermally benign, non-ASIL contexts.

Availability

TPS92629QDGNRQ1 is available at Aetrix Electronics and suitable for automotive exterior lighting, interior ambient modules, and EV charging interface illumination requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for TPS92629QDGNRQ1 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 leader specializing in analog, embedded processing, and automotive-grade power management solutions, with over 40 years of automotive qualification expertise.

The TPS926xx-Q1 product line delivers high-precision, thermally robust LED drivers for functional safety–critical automotive lighting, designed specifically to meet ASIL-B system requirements and eliminate external thermal management components.

FAQ

What is the maximum continuous output current capability of the TPS92629QDGNRQ1?

The TPS92629QDGNRQ1 supports up to 250 mA total channel current, dynamically distributed between the OUT and RES pins based on thermal headroom. At 150 mA, dropout voltage remains ≤350 mV; at 250 mA, it stays ≤500 mV - enabling reliable operation with low-forward-voltage LED strings across automotive voltage ranges.

How does the TPS92629QDGNRQ1 implement thermal sharing, and what external components are required?

The TPS92629QDGNRQ1 uses dual current outputs (OUT and RES) to route part of the LED current through an external shunt resistor connected to the RES pin. This offloads power dissipation from the IC die. Required components include one high-side sense resistor (R_SNS) on the IN pin and one thermal-shunt resistor (R_SHUNT) on the RES pin - values selected per target current and thermal budget.

What fault conditions does the TPS92629QDGNRQ1 detect, and how are they reported?

The TPS92629QDGNRQ1 detects LED open-circuit, short-to-GND, short-to-battery, and thermal shutdown. Each fault type produces a distinct voltage level on the FAULT pin: ~0.61 V (STG), ~1.11 V (STB), ~1.83 V (OPEN), and ~2.80 V (TSD). These levels allow microcontroller GPIOs to decode fault type without additional analog circuitry.

Can the TPS92629QDGNRQ1 support both PWM and analog dimming simultaneously?

Yes - the TPS92629QDGNRQ1 supports concurrent control: EN/PWM pin enables/disables the channel and provides coarse brightness adjustment via duty cycle, while the ADIM pin accepts a separate 20 kHz PWM signal to fine-tune current with 1 ms slew rate for flicker-free analog dimming. Both signals must be high to activate diagnostics.

Is the TPS92629QDGNRQ1 pin-compatible with other devices in the TPS926xx-Q1 family?

No - the TPS92629QDGNRQ1 uses an 8-pin HVSSOP (DGN) package with a specific pinout (e.g., RES on Pin 5, FAULT on Pin 4). The TPS92630QDGNTQ1 shares the same package footprint but differs in internal channel count and pin function mapping; direct replacement requires schematic and layout revision.