Texas Instruments TPIC44L02DB

Overview

TPIC44L02DB from Texas Instruments is a 4-channel serial/parallel-input low-side pre-FET driver for automotive and industrial solenoid/relay control. It provides independent shorted-load/short-to-battery and OFF-state open-load fault detection per channel, 55-V inductive clamp, V_GS protection, and under/over-battery voltage lockout (4.8 V UVLO, 34 V OVLO). It operates with V_BAT up to 60 V and drives external N-channel power FETs in low-frequency switching applications.

For engineers reviewing the TPIC44L02DB datasheet, TPIC44L02DB pinout, TPIC44L02DB application, or TPIC44L02DB equivalent, key selection considerations include its PWM-mode fault response (vs. latch-off in TPIC44L01/L03), cascaded serial interface support, V_COMPEN-selectable fault reference, and integrated battery voltage monitoring with hysteresis.

Technical Context

The TPIC44L02DB implements dual-input control logic enabling simultaneous serial (SDI/SCLK/CS/SDO) and parallel (IN0–IN3) activation of four independent gate drivers. Each channel features asynchronous fault sensing with deglitch timers (t_STBFM = 60 µs, t_STBDG = 8 µs) and real-time drain monitoring via internal 1.25-V reference or external V_COMP.

Under shorted-load fault, TPIC44L02DB transitions affected GATE outputs to low-duty-cycle PWM (not shutdown), preserving thermal safety while maintaining diagnostic visibility. Battery protection includes 34 V overvoltage shutdown with 1 V hysteresis and 4.8 V undervoltage lockout (100–300 mV hysteresis), both disabling all outputs and asserting FLT.

Key Specifications

Pinout & Package

TPIC44L02DB is housed in a 24-pin SOIC (DB) package with exposed thermal pad, rated for –40°C to +125°C case temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPIC44L01DB, TPIC44L02DB offers superior thermal management under sustained short-circuit conditions via PWM recovery, while TPIC6B595N lacks critical protection and sensing features needed for automotive-grade solenoid control - making TPIC44L02DB the optimal choice for robust, self-monitoring low-side drive.

Availability

TPIC44L02DB is available at Aetrix Electronics and suitable for automotive body control, industrial relay panels, and off-highway equipment requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.

Supply support for TPIC44L02DB 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 TPIC44L02DB belongs to TI's TPIC family of intelligent power switches and predrivers, designed specifically for fault-resilient control of inductive loads in harsh 12/24-V environments.

FAQ

What distinguishes TPIC44L02DB from TPIC44L01DB in fault handling?

The TPIC44L02DB responds to shorted-load faults by transitioning the affected GATE output into a low-duty-cycle PWM mode to limit power dissipation and prevent FET overheating, whereas TPIC44L01DB disables the output entirely and holds it off until manually reset. This makes TPIC44L02DB more thermally resilient in intermittent fault scenarios. Both devices share identical pinout, serial interface, and protection features like OVLO/UVLO and 55-V clamp.

How does TPIC44L02DB support daisy-chained configurations?

TPIC44L02DB supports cascading via its SDO pin, which passes serial input data to the next device in the chain while simultaneously outputting fault data. When multiple TPIC44L02DB units are connected, a single MCU SPI interface can configure all devices and read back consolidated fault status - reducing interconnect complexity and GPIO usage. The device requires exactly four data bits per stage in the serial stream.

Can TPIC44L02DB operate with a 5-V logic supply and 24-V battery supply simultaneously?

Yes. TPIC44L02DB separates logic and power domains: VCC (4.5–5.5 V) powers internal logic and interfaces, while VBAT (8–24 V nominal, up to 60 V absolute max) supplies the gate drivers and fault-sensing circuitry. This dual-supply architecture allows direct interfacing with 5-V microcontrollers while controlling 24-V solenoids or relays - with no level-shifting required for INx, CS, or SDO signals.

What is the role of VCOMPEN and VCOMP pins on TPIC44L02DB?

VCOMPEN selects the fault reference source: grounded → internal 1.25-V reference; tied to VCC → external reference applied to VCOMP pin. This allows customization of shorted-load and open-load detection thresholds for non-standard loads (e.g., high-resistance solenoids or aged coils). The internal reference is factory-trimmed and stable over temperature, while VCOMP accepts 0.25–3 V inputs for fine-tuned sensitivity.

Does TPIC44L02DB require external components for basic operation?

TPIC44L02DB operates autonomously with minimal externals: an external pullup resistor on FLT (for interrupt signaling), pullups on unused DRAINx pins (to VBAT, to prevent false open-load flags), and standard decoupling capacitors on VCC and VBAT. No external TVS diodes are needed due to its integrated 55-V inductive clamp, and no gate resistors are required for typical automotive FETs - significantly reducing BOM count and PCB area.