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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

STMicroelectronics L9954TR

Name: L9954TR
Brand: STMicroelectronics
SKU: L9954TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9954TR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: PowerSO-36 Exposed Bottom Pad

Datasheet:: L9954TR.pdf

Description:: IC DVR DOOR ACTUATOR POWERSO-36

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Product details

Overview

L9954TR from STMicroelectronics is an automotive-grade door actuator driver IC integrating three half-bridge outputs (±1.5 A, R_ON = 800 mΩ), one 6 A high-side driver (R_ON = 100 mΩ), and two 1.5 A high-side drivers (R_ON = 800 mΩ), all SPI-controlled for mirror axis control, defroster, and 10 W lighting loads in vehicle door modules.

For engineers reviewing the L9954TR datasheet, L9954TR pinout, L9954TR application, or L9954TR equivalent, this device supports programmable softstart, current monitoring on OUT1/OUT4–OUT6, open-load/overload diagnostics, reverse-polarity protection via charge pump, and thermal shutdown at 170 °C - critical for automotive body electronics design validation.

Technical Context

The L9954TR implements a microcontroller-driven architecture with a standard 24-bit SPI interface for full configuration of forward/reverse/brake/high-Z states and real-time diagnostic readback. All six outputs feature independent overtemperature, short-circuit, open-load, and overload protection with dedicated status bits.

It operates from dual supplies: VS (7–28 V) for power outputs and VCC (4.5–5.3 V) for logic, enabling robust operation across automotive battery transients. The integrated charge pump (VS+6 to VS+13 V) drives external N-MOSFETs for reverse polarity protection, while PWM1 and CM/PWM2 support hybrid analog/digital control of OUT1–OUT4 and OUT6.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Configuration	Three half-bridges (OUT1–OUT3); one 6 A high-side (OUT6); two 1.5 A high-sides (OUT4–OUT5)
Max Output Current	±5 A for OUT1–OUT3; −10.5 A for OUT6; −3 A for OUT4–OUT5 - defines motor drive and resistive load capability
R_ON (Typ, 25°C)	800 mΩ (half-bridge & OUT4/OUT5); 100 mΩ (OUT6) - determines conduction loss and thermal derating
Standby Current	< 6 µA (T_j ≤ 85 °C) - enables ultra-low-power sleep mode in always-on vehicle systems
Diagnostic Coverage	Open-load detection (15–60 mA threshold), current monitor (1/10,000 ratio), thermal warning (130 °C), shutdown (170 °C)
SPI Interface	24-bit serial control with CSN/CLK/DI/DO; supports fault reporting, register read/write, and configuration persistence
Supply Range	VS: 7–28 V; VCC: 4.5–5.3 V - accommodates cold-crank (6.5 V) and load-dump (28 V) conditions per ISO 16750

Pinout & Package

Package: PowerSO-36 (exposed thermal pad, RoHS-compliant, ECOPACK®).

Pin	Circuit Role	Design Meaning
1, 18, 19, 36	GND	Power and logic ground reference; all four pins must be externally connected for full-current capability and thermal performance
2, 35	OUT6	6 A high-side output for mirror defroster or lighting; lacks internal GND-reverse diode - requires external flyback path
3–5	OUT1–OUT3	Half-bridge outputs with integrated high/low DMOS switches; each includes bulk-drain diodes for freewheeling
6, 7, 14, 25, 28, 32	VS	Main power supply input (7–28 V); six pins must be externally connected to minimize IR drop and improve transient response
8	DI	SPI data input (CMOS level); receives 24-bit command word LSB-first for mode and diagnostic register access
9	CM/PWM2	Bidirectional pin: current monitor output (1/10,000 scaling) for OUT1/OUT4–OUT6 OR PWM2 input for OUT5 control
10	CSN	Active-low SPI chip select; enables serial communication and places DO in high-impedance when deasserted
11	DO	SPI data output (tri-state); delivers 24-bit status register including fault flags and diagnostic results
12	VCC	Logic supply (4.5–5.3 V); requires local ceramic decoupling to GND for noise immunity and POR stability
13	CLK	SPI clock input (CMOS level); controls internal shift register timing; max frequency not specified but compatible with typical MCU SPI peripherals
26	CP	Charge pump output (VS+6 to VS+13 V); drives gate of external N-channel MOSFET for reverse polarity protection
27	PWM1	External PWM input controlling OUT1–OUT4 and OUT6; overrides SPI commands for real-time duty-cycle modulation
31, 33, 34	OUT4, OUT5	1.5 A high-side outputs for auxiliary lighting; no internal GND-reverse diode - external clamping required

Key Features

Feature	Design Value
Programmable Softstart	Configurable ramp time for OUT1–OUT6 to limit inrush current during motor startup or cold filament turn-on
Current Monitoring	Analog current mirror output (1/10,000 ratio) on OUT1, OUT4, OUT5, and OUT6 enables real-time load health assessment without shunt resistors
Dual Supply Architecture	Independent VS (power) and VCC (logic) rails allow operation under battery transients while maintaining digital integrity
Comprehensive Diagnostics	Per-output open-load detection (15–60 mA), overload flag, thermal warning (130 °C), and hard shutdown (170 °C) with hysteresis
Reverse Polarity Protection Support	Integrated charge pump (VS+6 to VS+13 V) provides gate drive for external N-MOSFET, eliminating need for costly P-MOS solutions

Applications

Mirror Axis Control

Mirror Defroster Drive

Use Scenario: Bidirectional DC motor control for vertical/horizontal mirror positioning in automotive door modules.

IC Role / Device Role / Timing Role: Half-bridge driver (OUT1–OUT3) delivering ±1.5 A with cross-current protection and PWM-controlled direction reversal.

Use Value: Enables precise, jitter-free mirror movement with built-in short-circuit and thermal protection - eliminating need for discrete protection circuitry.

Use Scenario: High-current resistive heating element activation for rearview mirror defogging in low-temperature environments.

IC Role / Device Role / Timing Role: 6 A high-side driver (OUT6) with programmable softstart to manage 10–15 A inrush during cold startup.

Use Value: Delivers full heater power within 200 ms while limiting peak current to prevent fuse tripping or voltage sag on shared VS rail.

Door Lighting Control

Lock/Folder Actuation

Use Scenario: Switching of 10 W incandescent or LED bulbs for interior door courtesy lighting.

IC Role / Device Role / Timing Role: Dual 1.5 A high-side drivers (OUT4–OUT5) with open-load diagnostics to detect bulb burnout or wiring faults.

Use Value: Provides fail-safe illumination control with automatic fault reporting via SPI - reducing system-level diagnostic overhead.

Use Scenario: Driving small solenoids or latching actuators for door lock/unlock and folder release mechanisms.

IC Role / Device Role / Timing Role: Half-bridge (OUT1–OUT3) or high-side (OUT4–OUT6) configured for unidirectional pulse drive with current-limited hold phase.

Use Value: Ensures reliable mechanical actuation under battery voltage variation (7–16 V) while detecting coil open-circuit or jam conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
L9954XPTR	Same silicon die, packaged in PowerSSO-36 instead of PowerSO-36; identical electrical specs and pinout mapping	Higher thermal resistance (R_thJA = 35 K/W vs. 28 K/W) and different mounting footprint - requires PCB redesign	Select for designs prioritizing surface-mount assembly compatibility over thermal performance in space-constrained modules
TLE9201SG	Single half-bridge (3.5 A), no high-side drivers or current monitor; SPI interface limited to basic control/status	Cannot replace L9954TR's multi-output architecture - requires three TLE9201SGs plus external logic for equivalent functionality	Choose only for simplified, cost-sensitive single-motor applications where diagnostic depth and integration are secondary

Compared with L9954XPTR, the L9954TR offers lower thermal resistance and proven mechanical reliability in PowerSO-36; versus TLE9201SG, it delivers 3× higher functional integration, eliminating interposer boards and reducing BOM count by >60% in full door module designs.

Availability

L9954TR is available at Aetrix Electronics and suitable for automotive door module production, mirror actuation systems, and body control unit (BCU) subassemblies requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for L9954TR 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 AEC-Q100 qualification expertise.

The L9954TR belongs to ST's automotive body electronics portfolio, designed specifically for intelligent door actuation with integrated diagnostics, safety compliance (ISO 26262 ASIL-B ready), and robustness against harsh vehicle environments.

FAQ

What is the maximum allowable junction temperature before thermal shutdown activates?

Thermal shutdown triggers at 170 °C when junction temperature rises, with hysteresis of 5 K - meaning the device resumes operation only after cooling to ≤150 °C. This threshold is guaranteed across the full operating range (−40 to 150 °C ambient) and validated per JEDEC JESD22-A104. The thermal warning flag asserts earlier at 130 °C to enable system-level thermal management.

How does the current monitor function work, and which outputs does it support?

The current monitor (CM/PWM2 pin) provides an analog voltage proportional to load current at a 1:10,000 scaling factor for OUT1, OUT4, OUT5, and OUT6. It sources up to 600 µA into a 10 kΩ load, yielding 0–3.8 V output for 0–6 A sensed current. Accuracy is ±(4% + 1% FS) at room temperature, with guaranteed linearity across the full operating junction range.

Can the L9954TR drive inductive loads without external freewheeling components?

Yes - the half-bridge outputs (OUT1–OUT3) include internal parasitic bulk-drain diodes that provide freewheeling paths for inductive energy dissipation. However, the high-side drivers (OUT4–OUT6) lack internal GND-reverse diodes and require external flyback diodes or TVS devices connected between output and VS to clamp inductive kickback and prevent damage.

Is the L9954TR pin-compatible with earlier revisions or alternate package variants?

The L9954TR (PowerSO-36) shares identical pinout, electrical behavior, and register map with the L9954 (same package, tube format) and L9954XPTR (PowerSSO-36). Mechanical compatibility is limited to PowerSO-36 footprints; PowerSSO-36 requires PCB layout revision due to different pad geometry and thermal pad configuration.

L9954TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: PowerSO-36 Exposed Bottom Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Applications:: -

Current - Supply:: 7mA

Voltage - Supply:: 7V ~ 28V

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSO-36

L9954TR FAQ

1.How can I place an order for L9954TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L9954TR 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 L9954TR reliable?

The price and inventory of L9954TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9954TR is usually 5 days.

3.What payment methods are accepted for L9954TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9954TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9954TR?

L9954TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9954TR 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 L9954TR?

For technical support, including L9954TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9954TR requirements.

6.How does Aetrix verify that L9954TR is sourced from the original manufacturer or authorized distributors?

All L9954TR 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 L9954TR meets industry standards.

7.What is the process for return or replacement of L9954TR?

All L9954TR units undergo pre-shipment inspection (PSI). If there is an issue with L9954TR, 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 L9954TR part is unused and in its original packaging.

Return procedure for L9954TR:

1.Submit a request within 90 days.

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

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