Texas Instruments TPIC46L02DB

Overview

TPIC46L02DB 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 voltage up to 13.5 V (VBAT = 12 V), supports independent shorted-load and open-load fault detection per channel, and implements under-battery voltage lockout (4.1–5.4 V shutdown) and over-battery voltage protection (32–36 V shutdown). It is used in solenoid, relay, and lamp control systems requiring real-time fault reporting and robust transient protection.

For engineers reviewing the TPIC46L02DB datasheet, TPIC46L02DB pinout, TPIC46L02DB application, or TPIC46L02DB equivalent, this page provides verified functional identity, validated DB-package pin mapping, confirmed fault-handling behavior (PWM-mode short-circuit response), exact electrical specs including VGS clamp, and two manufacturer-validated alternative parts with documented technical differences.

Technical Context

The TPIC46L02DB integrates dual-input control logic (serial shift register + parallel IN0–IN5) enabling asynchronous real-time gating or minimized-signal serial configuration. Its fault engine performs independent on-state short-to-battery detection (1.1–1.4 V threshold) and off-state open-load sensing (60 µA current source), both with 8 µs deglitch timing and 40–150 mV hysteresis.

Unlike TPIC46L01/L03, TPIC46L02DB transitions gate outputs into low-duty-cycle PWM (10 ms refresh, 68 µs pulse width) during sustained shorted-load faults - preventing FET thermal runaway without requiring controller intervention. Battery UVLO/OVLO protection operates independently of output state and disables all channels while asserting FLT and serial fault bits 7 and 8.

Key Specifications

Pinout & Package

TPIC46L02DB uses a 28-pin SOIC (DB) package with exposed thermal pad. Pin numbering follows standard top-view layout; GND (Pin 15) serves as substrate and power return.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPIC46L01DB and TPIC46L03DB, TPIC46L02DB uniquely combines UVLO protection with automatic PWM-mode recovery - making it optimal for 12 V/24 V dual-voltage systems requiring both fault tolerance and autonomous load recovery without MCU involvement.

Availability

TPIC46L02DB is available at Aetrix Electronics and suitable for automotive body electronics, industrial solenoid control, and off-highway lighting systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPIC46L02DB 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 decades of automotive-grade product validation.

The TPIC46L02DB belongs to TI's TPIC family of intelligent power switch controllers, engineered specifically for robust low-frequency load switching in harsh environments - emphasizing fault resilience, wide battery range operation, and simplified system-level diagnostics.

FAQ

What is the key functional difference between TPIC46L02DB and TPIC46L01DB?

The TPIC46L02DB responds to shorted-load faults by entering low-duty-cycle PWM mode to sustain partial operation and prevent FET overheating, whereas TPIC46L01DB immediately disables the affected channel until reset by the host controller. This makes TPIC46L02DB ideal for solenoid or relay loads where temporary fault recovery is acceptable. Both share identical pinout, serial protocol, and protection features like 55-V clamp and OVLO.

Does TPIC46L02DB support both serial and parallel input interfaces simultaneously?

Yes, TPIC46L02DB supports concurrent serial and parallel control: a logic HIGH on IN0–IN5 or a '1' bit in the serial data stream will independently enable the corresponding GATE output. The parallel interface provides sub-microsecond response (tPHL = 3.5 µs), while serial operation minimizes signal count. Fault status remains accessible only via serial readback or FLT pin assertion.

What is the purpose of the VCOMPEN and VCOMP pins on TPIC46L02DB?

VCOMPEN selects the fault reference voltage source: tied to GND for internal 1.25 V reference, or to VCC to enable external reference applied to VCOMP (0.25–3 V). This allows precise tuning of short-to-battery and open-load detection thresholds for varying load characteristics or PCB trace impedances - critical for reliable fault discrimination in noisy automotive environments.

How does TPIC46L02DB handle battery undervoltage conditions?

TPIC46L02DB implements under-battery voltage lockout (UVLO) with shutdown threshold of 4.1–5.4 V and 100–300 mV hysteresis. When VBAT drops below this range, all six GATE outputs disable, FLT asserts low, and bit 7 of the serial fault word sets. UVLO remains active regardless of channel state and re-enables open/short fault reporting only after VBAT recovers above the hysteresis threshold.

Can TPIC46L02DB be used in cascaded serial configurations?

Yes, TPIC46L02DB supports daisy-chained serial operation: SDI receives control data, SDO outputs fault data followed by the same input data, enabling multi-device control with one microcontroller SPI port. Each device requires 8-bit frames (2 dummy + 6 channel bits); fault data from all devices appears sequentially on SDO during CS low, preserving channel-specific bit alignment.