Texas Instruments TPIC46L01DB

Overview

TPIC46L01DB 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, supports independent shorted-load and off-state open-load fault detection per channel, integrates 55-V inductive clamp protection, and operates across 8–24 V battery supply range with overvoltage shutdown at 34 V.

For engineers reviewing the TPIC46L01DB datasheet, TPIC46L01DB pinout, TPIC46L01DB application, or TPIC46L01DB equivalent, this page provides verified functional identity, validated DB-package pin mapping, confirmed fault-handling behavior (channel disable on shorted-load), real-world timing specs (tPLH = 4 µs), and direct alternative part comparisons for solenoid, relay, and resistive load control designs.

Technical Context

The TPIC46L01DB implements dual-input control architecture: asynchronous parallel inputs (IN0–IN5) enable immediate channel activation, while serial interface (CS/SDI/SCLK/SDO) supports daisy-chained configurations with fault data reporting. Its internal fault logic uses a selectable reference (VCOMPEN-controlled) to compare DRAIN voltage against 1.25 V threshold for both short-to-battery (on-state) and open-load (off-state) detection.

Fault response is variant-specific: TPIC46L01DB disables the affected GATE output upon shorted-load detection and asserts FLT and serial fault bit; it also enables under-battery voltage lockout (4.8 V shutdown) and over-battery voltage lockout (34 V shutdown), with hysteresis of 200 mV and 1 V respectively. All six GATE outputs are driven from VBAT with internal VGS clamping and 55-V drain transient protection.

Key Specifications

Pinout & Package

TPIC46L01DB is housed in a 28-pin SOIC (DB) package with exposed thermal pad, optimized for surface-mount assembly and thermal dissipation in high-current switching applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPIC46L01DB, TPIC46L02DB trades deterministic fault shutdown for thermal-safe PWM recovery, while TPIC2603DB reduces integration scale but retains identical fault reporting fidelity and timing performance per channel - enabling modular design reuse across product tiers.

Availability

TPIC46L01DB is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output modules, and off-highway equipment control requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for TPIC46L01DB 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 for automotive, industrial, and communications markets.

The TPIC46L01DB belongs to TI's TPIC family of intelligent power switch controllers, engineered specifically for robust, fault-aware driving of external power FETs in harsh 12/24 V environments with integrated diagnostics.

FAQ

What is the primary function of the TPIC46L01DB in a power control system?

The TPIC46L01DB serves as a 6-channel low-side pre-FET driver that translates digital control signals (serial or parallel) into robust gate drive voltages for external N-channel MOSFETs. It actively monitors each channel for shorted-load, open-load, overvoltage, and undervoltage faults - disabling affected outputs and reporting status via FLT and serial interface. Its design ensures safe, diagnostic-capable switching of inductive loads like solenoids and relays in automotive and industrial settings.

How does the TPIC46L01DB handle a shorted-load fault condition?

When a shorted-load fault is detected on any channel, the TPIC46L01DB immediately disables the corresponding GATE output and asserts the open-drain FLT pin low. The fault is also latched into the serial fault register (bit 0–5). Unlike TPIC46L02DB, TPIC46L01DB does not enter PWM mode - the channel remains off until the fault is cleared and the control signal is reasserted. This behavior is hardwired and requires no firmware intervention.

Does the TPIC46L01DB support daisy-chaining with other identical devices?

Yes, the TPIC46L01DB supports serial interface cascading: its SDO pin outputs shifted-in control data after fault bits, allowing multiple TPIC46L01DB devices to share a single CS, SCLK, and SDI line. Each device contributes 6 control bits and 8 fault bits (OV, UV, and six channel flags) in sequence - enabling centralized control of up to N×6 loads with minimal MCU GPIO usage.

What is the role of VCOMPEN and VCOMP pins on the TPIC46L01DB?

VCOMPEN (Pin 2) selects the fault reference voltage source: grounded for internal 1.25 V reference, or pulled high to VCC to enable external reference applied to VCOMP (Pin 3). This allows customization of shorted-load and open-load detection thresholds for non-standard loads or noisy environments - for example, raising VCOMP above 1.25 V increases immunity to drain voltage ripple during FET switching.

Can the TPIC46L01DB operate with separate logic (VCC) and battery (VBAT) supplies?

Yes, the TPIC46L01DB uses dual supplies: VCC (4.5–5.5 V) powers internal logic and serial interface, while VBAT (8–24 V) supplies the GATE outputs and fault sensing circuitry. This separation isolates MCU-level logic from high-voltage load domains, improves noise immunity, and enables operation even when VBAT drops below VCC - provided VCC remains within specification.