Texas Instruments TPIC46L02DBRG4

Overview

TPIC46L02DBRG4 from Texas Instruments is a 6-channel serial/parallel low-side pre-FET driver designed to control external N-channel power MOSFETs in automotive and industrial load-switching applications. It delivers gate drive up to 13.5 V (VBAT = 12 V), features independent shorted-load and off-state open-load fault detection per channel, includes 55-V inductive clamp protection, and implements under-battery-voltage lockout (4.1–5.4 V shutdown) and over-battery-voltage lockout (32–36 V shutdown).

For engineers reviewing the TPIC46L02DBRG4 datasheet, TPIC46L02DBRG4 pinout, TPIC46L02DBRG4 application, or TPIC46L02DBRG4 equivalent, key selection considerations include its PWM-mode fault response on shorted-load events (distinct from TPIC46L01/L03), dual serial/parallel interface flexibility, real-time FLT flag reporting, and integrated VGS and drain transient clamping for robust FET protection in 12 V/24 V battery systems.

Technical Context

The TPIC46L02DBRG4 uses a dual-path architecture: parallel inputs (IN0–IN5) enable immediate, asynchronous channel control without clocking, while the serial interface (CS/SDI/SCLK/SDO) supports daisy-chained configurations with fault data readback. Its fault logic independently monitors each DRAINx node using a selectable internal (1.25 V) or external VCOMP reference voltage for both short-to-battery (on-state) and open-load (off-state) detection.

Fault handling differs critically by variant: upon shorted-load detection, TPIC46L02DBRG4 transitions affected GATEx outputs into low-duty-cycle PWM (tw = 68 µs, tSB = 10 ms) instead of latching off-enabling automatic retry and thermal protection-while maintaining continuous FLT assertion and serial fault-bit reporting until cleared. Battery UVLO/OVLO protection operates independently of output state and disables all channels globally.

Key Specifications

Pinout & Package

TPIC46L02DBRG4 is housed in a 28-pin SOIC (DB) package with exposed thermal pad, optimized for surface-mount assembly and thermal dissipation in automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side pre-FET driver applications.

Compared with TPIC46L01DBRG4 and TPIC46L03DBRG4, TPIC46L02DBRG4 uniquely balances fault resilience and system continuity-its PWM-mode response prevents FET thermal failure during sustained shorts while retaining full diagnostic visibility via serial fault reporting and FLT assertion.

Availability

TPIC46L02DBRG4 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, and off-highway equipment control requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.

Supply support for TPIC46L02DBRG4 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 power management technologies, with deep expertise in automotive-grade IC design and manufacturing.

The TPIC46L02DBRG4 belongs to TI's TPIC family of high-reliability pre-FET drivers, engineered specifically for low-frequency inductive load control in 12 V/24 V battery systems with comprehensive fault diagnostics and protection.

FAQ

What distinguishes TPIC46L02DBRG4 from TPIC46L01DBRG4 in shorted-load handling?

The TPIC46L02DBRG4 responds to shorted-load faults by transitioning the affected GATEx output into a low-duty-cycle PWM mode (68 µs pulse width, 10 ms period), enabling automatic retry and thermal protection. In contrast, TPIC46L01DBRG4 immediately latches the output OFF until manually reset via serial or parallel command. This makes TPIC46L02DBRG4 more resilient in applications like solenoid control where temporary shorts may occur without requiring MCU intervention.

Does TPIC46L02DBRG4 support daisy-chaining with other TPIC46L devices?

Yes, TPIC46L02DBRG4 supports seamless daisy-chaining via its serial interface: SDI receives control data, SDO passes through unmodified serial input data to the next device while simultaneously outputting the 8-bit fault word (OV/UV + 6 channel flags). This allows a single MCU SPI port to configure and monitor multiple TPIC46L02DBRG4 devices with minimal signal routing.

How does TPIC46L02DBRG4 detect open-load faults?

TPIC46L02DBRG4 detects open-load faults during the OFF state of each channel using an internal 60 µA current source connected to each DRAINx pin. When the external load is disconnected, this current pulls the DRAINx voltage below the fault threshold (1.1–1.4 V, selectable via VCOMPEN), triggering a fault flag. Unused DRAINx pins must be pulled to VBAT to prevent false open-load reporting.

What is the purpose of the VCOMPEN and VCOMP pins on TPIC46L02DBRG4?

VCOMPEN selects the fault reference voltage source: tied to GND for the internal 1.25 V reference, or to VCC to enable an external reference applied to VCOMP. This allows precise tuning of shorted-load and open-load detection thresholds in noisy or temperature-variable environments, improving fault discrimination accuracy beyond the fixed internal reference.

Can TPIC46L02DBRG4 operate with both 12 V and 24 V battery supplies?

Yes, TPIC46L02DBRG4 is specified for VBAT = 8–24 V operation, making it compatible with standard automotive 12 V systems and industrial 24 V platforms. Its gate drive voltage scales with VBAT (7–13.5 V), and its 55-V drain clamp protects external FETs against transients in both domains. Battery UVLO (4.1–5.4 V) and OVLO (32–36 V) thresholds ensure safe operation across cranking and load-dump conditions.