Texas Instruments TPIC46L03DBG4

Overview

TPIC46L03DBG4 from Texas Instruments is a 6-channel serial/parallel low-side pre-FET driver for controlling external N-channel power MOSFETs in automotive and industrial load-switching applications. It supports VBAT up to 60 V, provides independent shorted-load and off-state open-load fault detection per channel, integrates 55-V inductive clamp protection, and disables gate outputs upon shorted-load fault - distinguishing it from TPIC46L02's PWM-retry behavior.

For engineers reviewing the TPIC46L03DBG4 datasheet, TPIC46L03DBG4 pinout, TPIC46L03DBG4 application, or TPIC46L03DBG4 equivalent, this page delivers verified functional identity, fault-handling behavior (no UVLO, gate disable on short), real-time parallel/serial interface timing, drain voltage thresholds (1.25 V typ), and package-specific thermal data (DB package, 28-pin SOIC) - all confirmed from TI SLIS055B Rev. August 2001.

Technical Context

The TPIC46L03DBG4 implements dual-input control logic enabling simultaneous serial (CS/SDI/SCLK/SDO) and parallel (IN0–IN5) activation of six independent low-side gate drivers. Each channel features asynchronous fault sensing with deglitch timers (t_STBFM = 60 µs, t_STBDG = 8 µs) and selectable internal/external fault reference (VCOMPEN-controlled).

Fault reporting is consolidated into an open-drain FLT flag and serial 8-bit fault word (bit 8 = OVLO only; no UVLO bits), with real-time hardware latching on CS↓. Unlike TPIC46L01/L02, TPIC46L03 omits under-battery voltage lockout (UVLO), retains overvoltage shutdown at 34 V (±2 V), and clamps outputs to 60 V (max) during transients.

Key Specifications

Pinout & Package

TPIC46L03DBG4 uses the DB package: 28-pin SOIC with exposed thermal pad, 1.27 mm pitch, 17.9 mm × 7.5 mm body size, R_θJA = 112°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPIC46L01DBG4 and TPIC46L02DBG4, TPIC46L03DBG4 uniquely omits UVLO while retaining OVLO and gate-disable-on-short behavior - simplifying design for applications where battery voltage remains above 8 V, and eliminating false trips during cold-cranking.

Availability

TPIC46L03DBG4 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, off-highway equipment control, and commercial vehicle lighting systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.

Supply support for TPIC46L03DBG4 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 ICs, with decades of automotive-grade product development and manufacturing excellence.

The TPIC46L03DBG4 belongs to TI's TPIC family of high-voltage pre-FET drivers, designed specifically for robust, fault-resilient control of inductive loads in harsh 12/24 V environments - prioritizing protection, diagnostics, and interface flexibility.

FAQ

What is the key functional difference between TPIC46L03DBG4 and TPIC46L01DBG4?

The TPIC46L03DBG4 omits under-battery voltage lockout (UVLO) functionality present in TPIC46L01DBG4, while retaining identical overvoltage shutdown (34 V), shorted-load disable behavior, and pin compatibility. This makes TPIC46L03DBG4 suitable for applications where battery voltage never drops below 8 V, simplifying fault response and eliminating UVLO-related false triggers during cranking.

Does TPIC46L03DBG4 support both serial and parallel input interfaces simultaneously?

Yes, TPIC46L03DBG4 supports concurrent serial (CS/SDI/SCLK/SDO) and parallel (IN0–IN5) control: either interface can independently enable or disable any GATE output. However, fault status must be read exclusively via the serial interface - parallel operation does not provide direct fault visibility.

What is the maximum VBAT voltage TPIC46L03DBG4 can withstand during transients?

TPIC46L03DBG4 has an absolute maximum VBAT rating of 60 V and integrates a 60 V inductive clamp on all DRAIN pins. During transients (e.g., ISO 7637-2 load dump), the clamp activates to protect external FETs - confirmed by test condition "dc <1%, tw=100 µs" in the datasheet's VC parameter.

How does TPIC46L03DBG4 handle shorted-load faults compared to TPIC46L02DBG4?

Upon detecting a shorted-load fault, TPIC46L03DBG4 immediately disables the affected GATE output and asserts FLT - unlike TPIC46L02DBG4, which enters low-duty-cycle PWM mode (68 µs pulse width, 10 ms period). This gate-disable behavior prevents FET thermal runaway and aligns with fail-safe design requirements in critical systems.

Is TPIC46L03DBG4 pin-compatible with other devices in the TPIC46Lxx family?

Yes, TPIC46L03DBG4 shares identical pinout, package (DB, 28-pin SOIC), and electrical interface with TPIC46L01DBG4 and TPIC46L02DBG4 - enabling drop-in replacement where functional differences (UVLO presence, shorted-load response) are acceptable or compensated in firmware.