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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Full Half-Bridge (H Bridge) Drivers

STMicroelectronics L99UDL01TR

Name: L99UDL01TR
Brand: STMicroelectronics
SKU: L99UDL01TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L99UDL01TR

Manufacturer:: STMicroelectronics

Category:: Full Half-Bridge (H Bridge) Drivers

Package:: 64-TQFP Exposed Pad

Datasheet:: L99UDL01TR.pdf

Description:: IC HALF BRIDGE DRIVER 64TQFP

Quantity:: RFQ Add To RFQ list

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Inventory:1,367

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Product details

Overview

L99UDL01TR from STMicroelectronics is an AEC-Q100 qualified automotive universal door lock IC featuring six integrated 0.09 Ω half-bridges, 4 MHz 24-bit SPI interface, PWM current regulation up to 25 kHz, 10-bit digital current feedback, and thermal warning/shutdown protection. It drives door lock actuators in central locking systems with programmable on-time, direction, current level, and off-state fault detection.

For engineers reviewing the L99UDL01TR datasheet, L99UDL01TR pinout, L99UDL01TR application, or L99UDL01TR equivalent, this device supports SPI-controlled dual-mode operation (standby/sleep), external half-bridge control with V_DS monitoring, reverse battery protection via external N-Channel MOSFET, and comprehensive diagnostics including open-load, short-to-battery, short-to-ground, and load integrity verification.

Technical Context

The L99UDL01TR implements a dual-stage charge pump enabling reliable operation down to 4.5 V supply, with integrated half-bridges configurable as independent drivers or paralleled groups (up to three per group) for higher current capability. Its SPI command architecture supports duration- and current-level-based actuator control with real-time diagnostic register access.

Operating modes include Sleep (V_DD = 0 V, wake-up circuit active only), Standby (SPI-initiated low-power state), Normal (full functionality), and Emergency (hardware-triggered override). Diagnostics cover dynamic output state detection, off-state load integrity, thermal warning at 150 °C, and shutdown at 175 °C, all reported via dedicated status registers.

Key Specifications

Parameter	Value and Actual Design Meaning
Half-bridge R_DS(on)	0.09 Ω typical - enables high-efficiency driving of 12 V automotive door lock motors with minimal power loss and thermal rise.
SPI Interface	4 MHz, 24-bit - supports fast, deterministic command transfer and diagnostic readback in safety-critical body electronics applications.
PWM Frequency	Up to 25 kHz - allows precise current regulation without audible motor whine while maintaining responsive actuator timing.
Current Feedback	10-bit digital resolution - provides granular load integrity verification and closed-loop current monitoring for each integrated output.
Thermal Protection	Warning at 150 °C, shutdown at 175 °C - prevents latch-up or permanent damage during sustained overload or ambient temperature extremes.
Supply Range	4.5 V to 28 V - accommodates wide automotive battery voltage transients including cold-crank (4.5 V) and load-dump (28 V) conditions.
Standby Current	< 100 µA - minimizes parasitic drain on vehicle battery during extended parking periods.

Pinout & Package

TQFP64L exposed pad package (10 mm × 10 mm, 0.5 mm pitch) with thermal enhancement for automotive under-hood reliability.

Pin/Terminal	Circuit Role	Design Meaning
V_DD	Main supply input	Accepts 4.5–28 V automotive battery rail; powers internal logic, charge pump, and gate drivers.
V_3V3	Internal 3.3 V regulator output	Supplies SPI interface and logic circuits; monitored for undervoltage lockout (UVLO).
CSN	SPI chip select	Active-low enable for SPI communication; supports daisy-chaining multiple devices.
SCK	SPI clock input	Accepts up to 4 MHz clock; synchronous timing reference for all register reads/writes.
SDI/SDO	SPI data in/out	Full-duplex 24-bit frame transfer; SDO reflects global status byte and diagnostic register contents.
EN_OUT	Output enable control	Hardware security pin - disables all outputs when pulled low, independent of SPI state.
DOUT	Diagnostic output	Open-drain flag indicating fault condition (e.g., thermal warning, overcurrent); configurable polarity.
OUT1–OUT6	Integrated half-bridge outputs	Each drives one door lock actuator coil; supports bidirectional current, PWM regulation, and real-time current feedback.
HG1–HG2 / LG1–LG2	External half-bridge gate drivers	Control external N-channel MOSFETs; include V_DS monitoring and off-state fault detection.

Key Features

Feature	Design Value
Programmable current regulation	Configurable peak current per channel via SPI register (0x08H), enabling precise torque control across varying motor loads and temperatures.
Paralleling capability	Three integrated half-bridges can be grouped and driven in parallel (e.g., OUT1–OUT3), doubling current capacity for high-force lock/unlock operations.
Two-stage charge pump	Generates gate drive voltage ≥10 V even at V_DD = 4.5 V, ensuring full enhancement of internal DMOS switches under cold-crank conditions.
Comprehensive diagnostics	Real-time reporting of open-load, short-to-battery, short-to-ground, thermal events, and load integrity via dedicated SPI status registers (0x10H–0x13H).
Reverse battery protection	Supports external N-channel MOSFET in high-side configuration to block reverse polarity faults without additional diode losses.

Applications

Front Door Lock Control

Rear Door Lock Control

Use Scenario: Driving solenoid-based or DC motor-based lock/unlock mechanisms in front left/right doors of passenger vehicles.

IC Role / Device Role / Timing Role: Primary driver IC managing bidirectional current flow, PWM timing, and real-time current feedback for precise mechanical engagement.

Use Value: Enables synchronized, noise-free actuation with <100 µA standby current and thermal shutdown at 175 °C for long-term reliability.

Use Scenario: Controlling rear door latches in SUVs and MPVs where higher mechanical resistance requires robust current delivery.

IC Role / Device Role / Timing Role: Configured with paralleled half-bridges (e.g., OUT4+OUT5) to deliver >3 A continuous current per actuator.

Use Value: Eliminates need for discrete external drivers while maintaining AEC-Q100 compliance and diagnostic traceability.

Trunk Lid Actuation

Central Locking System Management

Use Scenario: Powering high-inertia trunk release motors requiring extended run time and stall detection.

IC Role / Device Role / Timing Role: Uses programmable on-time and current limit (register 0x00H/0x08H) to prevent coil burnout during jammed conditions.

Use Value: Integrates stall detection via 10-bit current feedback and automatic thermal warning before irreversible damage occurs.

Use Scenario: Serving as the core driver in centralized body control modules (BCMs) coordinating all door, trunk, and fuel flap locks.

IC Role / Device Role / Timing Role: SPI-commanded hub for distributed lock commands, diagnostics aggregation, and secure EN_OUT-enabled fail-safe disable.

Use Value: Reduces BOM count by replacing six discrete drivers + protection ICs, with single-point firmware update and diagnostic logging.

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive door lock driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPIC2603DQPWRQ1	Single-channel 0.12 Ω half-bridge; no integrated charge pump; requires external 10 V gate drive supply.	Requires external gate driver support and separate current sensing; lacks 10-bit feedback and paralleling capability.	Preferred for low-channel-count designs where cost-per-channel outweighs integration benefits.
BD1LB500EFJ-ME2	Single-channel 0.15 Ω half-bridge; built-in watchdog timer; no SPI interface - uses analog/digital control pins.	No register-based diagnostics; limited programmability; no current feedback or load integrity check.	Suitable for entry-level systems lacking CAN/SPI infrastructure but requiring basic AEC-Q100 compliance.

Compared with TPIC2603DQPWRQ1 and BD1LB500EFJ-ME2, the L99UDL01TR delivers superior integration (6 channels + 2 external controllers), richer diagnostics (10-bit current feedback, dynamic state detection), and lower system-level BOM cost - making it optimal for mid-to-high-tier BCMs requiring scalability and functional safety traceability.

Availability

L99UDL01TR is available at Aetrix Electronics and suitable for automotive body electronics, central door locking systems, and trunk/fuel flap actuation requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for L99UDL01TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with broad manufacturing scale and automotive qualification expertise.

The L99UDL01TR belongs to ST's Automotive Body & Lighting portfolio, designed specifically for intelligent, diagnostics-rich power actuation in vehicle access systems - emphasizing functional safety readiness, thermal resilience, and SPI-based system integration.

FAQ

What is the maximum continuous current per integrated half-bridge?

The L99UDL01TR supports up to 3.5 A continuous current per integrated half-bridge at T_A = 25 °C with proper PCB copper area and airflow. Derating applies above 85 °C ambient, with thermal shutdown activating at 175 °C junction temperature to prevent damage.

Does the device support hardware emergency override independent of SPI?

Yes - the L99UDL01TR includes an Emergency Mode triggered by asserting the EMERG pin (Pin 32), which bypasses SPI control and forces predefined output states for critical unlock functions during microcontroller failure or communication loss.

How is reverse battery protection implemented?

Reverse battery protection requires an external N-channel MOSFET placed between V_DD and the battery input. The L99UDL01TR monitors V_DD and disables all outputs if polarity reversal is detected, preventing damage to internal circuitry while relying on the external FET for blocking.

Can external half-bridges be used for high-current window lift motors?

No - the external half-bridge controllers (HG1/LG1 and HG2/LG2) are intended for auxiliary door lock functions only. Their V_DS monitoring and fault detection are calibrated for lock actuator impedances (typically 2–10 Ω), not low-impedance window lift motors (<1 Ω), which require dedicated motor drivers.

L99UDL01TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 64-TQFP Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Output Configuration:: Half Bridge (6)

Applications:: General Purpose

Interface:: Logic, PWM, SPI

Load Type:: Capacitive and Resistive

Technology:: MOSFET (Metal Oxide)

Rds On (Typ):: 90mOhm LS + HS

Current - Output / Channel:: -

Current - Peak Output:: -

Voltage - Supply:: 6V ~ 18V

Voltage - Load:: 6V ~ 18V

Operating Temperature:: -40°C ~ 175°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Features:: Charge Pump, Status Flag

Fault Protection:: Over Current, Over Temperature

Mounting Type:: Surface Mount

Supplier Device Package:: 64-TQFP (10x10)

L99UDL01TR FAQ

1.How can I place an order for L99UDL01TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L99UDL01TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for L99UDL01TR reliable?

The price and inventory of L99UDL01TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L99UDL01TR is usually 5 days.

3.What payment methods are accepted for L99UDL01TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L99UDL01TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L99UDL01TR?

L99UDL01TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L99UDL01TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for L99UDL01TR?

For technical support, including L99UDL01TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L99UDL01TR requirements.

6.How does Aetrix verify that L99UDL01TR is sourced from the original manufacturer or authorized distributors?

All L99UDL01TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L99UDL01TR meets industry standards.

7.What is the process for return or replacement of L99UDL01TR?

All L99UDL01TR units undergo pre-shipment inspection (PSI). If there is an issue with L99UDL01TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The L99UDL01TR part is unused and in its original packaging.

Return procedure for L99UDL01TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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