Texas Instruments TPS92613QNDRRQ1

Overview

TPS92613QNDRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive single-channel high-side linear LED driver delivering precise constant current up to 600 mA with ±4.6% accuracy over –40°C to +125°C ambient, featuring integrated open-circuit and short-to-ground diagnostics, thermal shutdown, and fault-bus support for one-fails–all-fail architectures in exterior lighting systems.

For engineers reviewing the TPS92613QNDRRQ1 datasheet, TPS92613QNDRRQ1 pinout, TPS92613QNDRRQ1 application, or TPS92613QNDRRQ1 equivalent, this page delivers verified technical context, real-world dropout voltage behavior at 10–300 mA, DIAGEN-controlled diagnostic enable logic, FAULT bus timing (t(OPEN_deg) = 80–175 µs), and validated alternatives for automotive LED driver selection.

Technical Context

The TPS92613QNDRRQ1 implements a high-side linear current regulator using an external sense resistor (R_SNS) to maintain V_{CS_REG} = 98 mV (typical) across it, enabling output current calculation as I_OUT = 98 mV / R_SNS. It operates from 4.5 V to 40 V supply and supports PWM dimming ≥100 Hz with 1%–100% duty cycle control.

Diagnostics include voltage-threshold-based LED open detection (V_IN – V_OUT < 100 mV falling threshold) and short-to-ground detection (V_OUT < 0.865 V falling threshold), both with 80–175 µs deglitch timers. The FAULT pin functions as bidirectional bus node-internally pulled up (5–12 µA) and actively pulled down (500–1000 µA) during faults-with configurable one-fails–all-fail operation across ≤15 devices.

Key Specifications

Pinout & Package

TPS92613QNDRRQ1 uses a TO-263-7 (NDR) package with exposed thermal pad (10.16 mm × 9.85 mm), optimized for high-power dissipation in automotive lighting modules. Thermal pad must be soldered to PCB ground plane for effective heat transfer.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS92613QNDRRQ1, TPS92612QNDRRQ1 reduces diagnostic capability but lowers BOM count in non-safety-critical zones, while TPS92630QPWPRQ1 scales functionality across three channels at the cost of increased PCB area and thermal complexity.

Availability

TPS92613QNDRRQ1 is available at Aetrix Electronics and suitable for automotive interior lighting, exterior small-light modules, rear lamp assemblies, and CHMSL applications requiring stable component supply across extended vehicle lifecycles.

Supply support for TPS92613QNDRRQ1 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 decades of experience in AEC-Q100-qualified power management solutions.

The TPS9261x-Q1 product line was designed specifically for automotive LED lighting systems requiring high accuracy, integrated diagnostics, and fault-bus interoperability - targeting dome lights, side markers, and rear lamps.

FAQ

What is the maximum continuous output current supported by the TPS92613QNDRRQ1?

The TPS92613QNDRRQ1 supports a maximum continuous output current of 600 mA, achieved by selecting an appropriate external sense resistor (R_SNS) to set I_OUT = 98 mV / R_SNS. This rating applies across the full operating junction temperature range (–40°C to +150°C) and input voltage range (4.5 V to 40 V), with thermal derating required above 125°C ambient depending on PCB copper area and airflow.

How does the DIAGEN pin affect fault detection in the TPS92613QNDRRQ1?

The DIAGEN pin in the TPS92613QNDRRQ1 exclusively controls LED open-circuit detection: when pulled above 1.2 V, open-circuit diagnostics are active; when pulled below 1.1 V, they are disabled. Short-to-ground and thermal shutdown remain fully operational regardless of DIAGEN state. This allows suppression of false open-circuit alarms during low-dropout operation without compromising other safety-critical protections.

Can the TPS92613QNDRRQ1 be used in a one-fails–all-fail configuration with other LED drivers?

Yes - the TPS92613QNDRRQ1 supports one-fails–all-fail operation via its FAULT pin, which can be tied together with up to 14 additional TPS9261x-Q1, TPS9263x-Q1, or TPS92830-Q1 devices. When any device pulls FAULT low, all connected devices detect the low voltage (≤0.7 V) and disable their outputs, satisfying redundancy requirements for automotive rear lamps and CHMSL per ECE R149.

What is the dropout voltage behavior of the TPS92613QNDRRQ1 at 300 mA output current?

At 300 mA output current, the TPS92613QNDRRQ1 exhibits a maximum dropout voltage of 1.3 V (including the 98 mV sense-resistor regulation voltage). This means the device requires at least 1.3 V headroom between the supply voltage and the LED string's forward voltage to maintain regulation. Below this headroom, output current decreases proportionally, and DIAGEN must be disabled to prevent false open-circuit reporting.

Does the TPS92613QNDRRQ1 support PWM dimming, and what frequency range is recommended?

Yes - the TPS92613QNDRRQ1 supports PWM dimming via its dedicated PWM input pin, with TI recommending 200 Hz operation and 1%–100% duty cycle for optimal human-eye perception and minimal audible noise. The device achieves fast response times: t(PWM_delay_rising) = 10–25 µs and t(PWM_delay_falling) = 15–30 µs, enabling precise brightness control without visible flicker or transient overshoot.