Texas Instruments TPS92622QDRRRQ1

Overview

TPS92622QDRRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive two-channel high-side linear LED driver with external thermal sharing capability, 4.5 V to 40 V input range, ±5% current accuracy over –40°C to +125°C, and independent 150-mA per-channel regulation via external sense resistors - used in rear lamps and center high-mounted stop lamps.

For engineers reviewing the TPS92622QDRRRQ1 datasheet, TPS92622QDRRRQ1 pinout, TPS92622QDRRRQ1 application, or TPS92622QDRRRQ1 equivalent, this page delivers verified package mapping (WSON-12), thermal-sharing architecture details, fault bus configuration options (one-fails–all-fail or N-1), and real-world diagnostic thresholds for LED open/short detection.

Technical Context

The TPS92622QDRRRQ1 implements dual independent high-side current regulators using a precision 150-mV sense voltage (V_{CS_REG}) with ±3% channel-to-channel mismatch and ±4% device-to-device mismatch. Each channel supports two parallel output paths - OUTx for direct LED anode connection and RESx for external shunt resistor-based thermal power dissipation - dynamically allocating current between them based on supply headroom.

Its diagnostics include programmable LED open-circuit detection (180–420 mV rising threshold), short-to-GND detection (0.855–1.26 V thresholds), auto-recovery retry currents (0.64–1.53 mA), and thermal shutdown at 157–187°C with 15°C hysteresis. The FAULT pin operates as a bidirectional fault bus supporting configurable one-fails–all-fail or per-channel isolation logic.

Key Specifications

Pinout & Package

TPS92622QDRRRQ1 is packaged in a 12-pin WSON (DRR) with 3.0 mm × 3.0 mm body and exposed thermal pad (DAP). The package supports high-power dissipation with R_θJA = 51.2°C/W and R_θJB = 25.2°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS92622QDRRRQ1, the TPS92622QDGNRQ1 adds hardware enable control and better board-level thermal performance but occupies more PCB area, while the TPS92612QDGSRQ1 reduces integration and thermal flexibility to achieve lower unit cost and smaller solution size for single-channel use cases.

Availability

TPS92622QDRRRQ1 is available at Aetrix Electronics and suitable for automotive exterior lighting, interior ambient lighting, and safety-critical CHMSL applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS92622QDRRRQ1 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 ICs with broad manufacturing scale and AEC-Q100 validation infrastructure.

The TPS92622-Q1 belongs to TI's automotive LED driver product line, engineered specifically for thermally constrained exterior lighting modules requiring high reliability, integrated diagnostics, and AEC-Q100 Grade 1 compliance.

FAQ

What is the function of the RES1 and RES2 pins on the TPS92622QDRRRQ1?

The RES1 and RES2 pins on the TPS92622QDRRRQ1 provide dedicated current output paths that route a controllable portion of each channel's total current through external shunt resistors. This thermal sharing architecture diverts power dissipation away from the IC die, enabling sustained 150-mA operation under high-input-voltage conditions (e.g., 40 V load dump) while keeping junction temperature below 150°C. The TPS92622QDRRRQ1 dynamically allocates current between OUTx and RESx based on available headroom - maximizing RESx current when dropout is large, and favoring OUTx when headroom is minimal.

Does the TPS92622QDRRRQ1 support PWM dimming, and what are the timing constraints?

Yes, the TPS92622QDRRRQ1 supports independent PWM dimming on PWM1 and PWM2 pins with guaranteed linearity from 1% to 100% duty cycle at frequencies ≥100 Hz. Verified timing data shows PWM rising-edge delay of 2.2–3.7 µs and falling-edge delay of 3.6–4.0 µs, with output current rise/fall times under 2 µs. TI recommends 200 Hz PWM for flicker-free operation; the TPS92622QDRRRQ1 maintains ±5% current accuracy across the full PWM range and temperature span, making it suitable for precision brightness control in automotive interior and exterior lighting.

How does the FAULT pin operate in one-fails–all-fail versus N-1 configuration on the TPS92622QDRRRQ1?

The FAULT pin on the TPS92622QDRRRQ1 functions as an open-drain bidirectional node. In one-fails–all-fail mode, all FAULT pins (including those from other TPS926xx-Q1 devices) are wired together with a single pull-up resistor; any device pulling FAULT low disables all channels system-wide. In N-1 mode, each FAULT pin is pulled up individually, so only the faulty channel shuts down while others remain operational. Configuration is determined solely by external resistor placement - no register programming or pin strapping is required - enabling flexible safety architecture implementation per UNECE R149 or OEM-specific requirements.

What is the purpose of the DIAGEN pin on the TPS92622QDRRRQ1, and when should it be asserted?

The DIAGEN pin on the TPS92622QDRRRQ1 disables LED open-circuit detection during low-dropout operation to prevent false fault triggering. It must be held high (≥1.14 V) when V_IN – V_OUT falls below ~300 mV - typically during startup, dimming, or low-battery conditions - to suppress the open-detection comparator. When deasserted (low), standard open-circuit diagnostics resume. This feature ensures robust operation across the full 4.5–40 V input range without requiring firmware compensation or external blanking circuits.

Can the TPS92622QDRRRQ1 be used without external shunt resistors on RES1/RES2?

Yes, the TPS92622QDRRRQ1 can operate with RES1 and RES2 pins left unconnected or tied directly to LED anodes (same as OUT1/OUT2), functioning as a conventional dual-channel high-side driver. In this configuration, all channel current flows through OUTx, increasing die power dissipation. Maximum usable current is then limited by thermal constraints: at 40 V input and 150 mA, dropout losses exceed 5.25 W - exceeding the WSON-12 package's safe operating area without aggressive heatsinking. Using RESx with appropriate shunt resistors (e.g., 55 Ω) reduces device power dissipation by >60%, enabling reliable full-load operation in compact automotive modules.