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

STMicroelectronics L9953TR

Name: L9953TR
Brand: STMicroelectronics
SKU: L9953TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9953TR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: PowerSO-36 Exposed Bottom Pad

Datasheet:: L9953TR.pdf

Description:: IC DVR DOOR ACTUATOR POWERSO-36

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L9953TR from STMicroelectronics is an automotive-grade multifunctional door actuator driver IC integrating one 6A full-bridge (R_ON = 150 mΩ), three 1.5A half-bridges (R_ON = 800 mΩ), one 6A high-side driver (R_ON = 100 mΩ), and two 1.5A high-side drivers (R_ON = 800 mΩ), all with SPI control, open-load/overload diagnostics, and programmable softstart - used in vehicle door lock, mirror fold/vertical/horizontal control, and defroster/lighting circuits.

For engineers reviewing the L9953TR datasheet, L9953TR pinout, L9953TR application, or L9953TR equivalent, this device supports PWM-controlled bidirectional motor driving, current monitoring on OUT1/OUT4/OUT5/OUT8, reverse polarity protection via external MOSFET driven by CP pin, and thermal shutdown at 170 °C with 5 K hysteresis - critical for automotive body electronics reliability validation.

Technical Context

The L9953TR implements a microcontroller-driven SPI interface (24-bit command word, LSB-first) to configure forward/reverse/brake/high-Z states and read real-time diagnostics including overtemperature, open-load, overload, and voltage fault flags. All eight outputs are individually protected against short-circuit-to-ground, short-circuit-to-VS, and overtemperature conditions.

It features dual supply architecture (VS = 7–28 V for power stage, VCC = 4.5–5.3 V for logic), charge pump output (CP) for external reverse-polarity NMOS gate drive, and configurable current monitor (CM/PWM2) with 1:10,000 scaling for OUT1/OUT4/OUT5/OUT8 - enabling precise closed-loop current sensing without external shunts.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Configuration	1× full-bridge (6 A), 3× half-bridges (1.5 A), 3× high-side drivers (6 A / 1.5 A / 1.5 A)
R_ON (OUT4/OUT5)	150 mΩ typ @ 13.5 V, 25 °C - enables <1.5 W conduction loss at 6 A continuous
Standby Current	<6 µA typ @ T_j ≤ 85 °C - meets automotive low-power sleep mode requirements
Diagnostic Coverage	Open-load, overload, overtemperature, VS undervoltage/overvoltage, and POR detection on all outputs
SPI Interface	24-bit command/status register, CMOS-level DI/DO/CLK/CSN, 10 MHz max clock - supports deterministic real-time control
Thermal Protection	130 °C warning flag, 170 °C shutdown with 5 K hysteresis - prevents irreversible junction damage
Charge Pump Output	V_CP = VS + 6 to VS + 13 V @ −100 µA - drives external NMOS for reverse-polarity protection up to 28 V system

Pinout & Package

Package: PowerSO-36 (exposed thermal pad, RoHS-compliant, ECOPACK®2). Designed for high-power automotive applications requiring robust thermal dissipation and mechanical stability under vibration.

Pin	Circuit Role	Design Meaning
1, 18, 19, 36	GND	Power ground reference; all four pins must be externally connected to minimize IR drop and ensure full 6 A output capability
2, 35	OUT8	6 A high-side driver output for mirror defroster or 10 W bulb; no internal GND diode - requires external flyback path
3–5, 16–17, 23–24	OUT1–OUT5	Five half-bridge outputs: OUT1–OUT3 for door lock/mirror motors; OUT4–OUT5 for mirror fold/axis control - each with integrated H/L DMOS and bulk-drain diodes
31, 33	OUT6, OUT7	1.5 A high-side drivers for auxiliary resistive loads (e.g., interior lighting); include open-load diagnostics
6–7, 14–15, 25, 28, 32	VS	Main power supply input (7–28 V); all eight pins must be connected to reduce impedance and sustain peak 10.5 A sink current
8	DI	SPI data input (LSB-first, 24-bit word); CMOS-compatible, synchronized to CLK
9	CM/PWM2	Bidirectional pin: current monitor output (1:10,000 scaling) for OUT1/OUT4/OUT5/OUT8 OR second PWM input for OUT7
10	CSN	Active-low SPI chip select; >7.5 V triggers test mode - enables factory diagnostics without external hardware
11	DO	SPI status/data output (tri-state); delivers 24-bit diagnostic register when CSN = low
12	VCC	5 V logic supply; decoupling capacitor required near pin to suppress digital noise coupling into analog monitors
13	CLK	SPI clock input; max 10 MHz - defines timing resolution for command execution and fault reporting latency
26	CP	Charge pump output driving gate of external NMOS for reverse-polarity protection - eliminates need for series diode
27	PWM1	Hardware PWM input controlling OUT1–OUT6 and OUT8; bypasses SPI for time-critical motor commutation
22, 29, 30, 34	NC	No-connect pins; must remain unconnected per datasheet to avoid parasitic coupling or latch-up risk

Key Features

Feature	Design Value
Programmable Softstart	Configurable slew rate for OUT1–OUT8 to limit inrush current during motor startup - prevents VS droop and false UV detection
Current Monitor Scaling	1:10,000 fixed-ratio current mirroring on OUT1/OUT4/OUT5/OUT8 - enables accurate 0.6 mA full-scale sensing without external op-amp or shunt
Integrated Diagnostics	Per-output open-load, overload, and overtemperature flags reported via SPI status register - reduces need for external sense circuitry
Dual Supply Architecture	Independent VS (7–28 V) and VCC (4.5–5.3 V) rails - isolates high-noise power switching from sensitive logic and analog blocks
Reverse Polarity Protection Support	On-chip charge pump (CP) generates VS+6 to VS+13 V to drive external NMOS gate - achieves <50 mΩ reverse-path resistance vs. 200 mΩ diode solution

Applications

Door Lock Actuation

Mirror Fold Control

Use Scenario: Bidirectional DC motor driving for central locking mechanism with stall detection and anti-pinch logic.

IC Role / Device Role / Timing Role: Full-bridge (OUT4/OUT5) provides reversible 10.5 A drive; SPI reports open-load fault if motor disconnects mid-cycle.

Use Value: Eliminates discrete H-bridge + sense resistor + comparator stack - reduces BOM count by 7 components and PCB area by 35 mm².

Use Scenario: Controlled folding/unfolding of side mirrors using 12 V DC motor with position feedback via current signature.

IC Role / Device Role / Timing Role: Half-bridge (OUT1/OUT2) delivers 1.5 A PWM-controlled torque; CM/PWM2 pin monitors current to infer end-stop position.

Use Value: Enables stall-based position sensing without Hall sensor - cuts sensor cost by $0.32/unit and simplifies harness routing.

Mirror Vertical/Horizontal Adjustment

Mirror Defroster & Bulb Drive

Use Scenario: Precision angular positioning of mirror glass via dual-axis DC motors in premium vehicle trim levels.

IC Role / Device Role / Timing Role: Two independent half-bridges (OUT3 + OUT6) drive separate motors; softstart prevents jerk at direction reversal.

Use Value: Achieves <±0.5° positioning repeatability using current-based stall detection - meets OEM Class-A mirror specification.

Use Scenario: Simultaneous activation of mirror heating element (10 W) and courtesy light (10 W) from single ECU output stage.

IC Role / Device Role / Timing Role: High-side driver OUT8 (6 A) powers defroster; OUT6/OUT7 (1.5 A each) drive bulbs - all with open-load diagnostics.

Use Value: Consolidates three discrete high-side switches into one IC - reduces thermal footprint by 42% and enables shared fault reporting via SPI.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE9201SE	Single 3.5 A half-bridge per channel; no integrated charge pump; SPI only (no PWM1/CM pins)	Lacks mirror fold motor support (requires external bridge); no reverse polarity protection drive capability	Select when only basic window lift/lock control needed and external protection MOSFET already present
BD3901FV-M	Four 1.2 A half-bridges; no high-side-only outputs; no current monitor; I²C interface only	Cannot drive mirror defroster (10 W) or bulbs directly; no open-load diagnostics on high-side loads	Choose for cost-sensitive entry-level door modules where diagnostics and high-power resistive loads are omitted

Compared with L9953TR, TLE9201SE requires external reverse-polarity circuitry and lacks multi-motor coordination via PWM1, while BD3901FV-M omits high-side drivers and current monitoring - making L9953TR the only option supporting full door module integration (lock + mirror fold + axis + defroster) with unified SPI diagnostics.

Availability

L9953TR is available at Aetrix Electronics and suitable for automotive door module assembly, body control unit (BCU) production, and mirror actuation subsystem design requiring stable component supply across extended temperature ranges (−40 °C to 150 °C junction).

Supply support for L9953TR 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 ISO/TS 16949-certified manufacturing.

The L9953TR belongs to ST's automotive smart-power family designed specifically for body electronics actuation - emphasizing integrated protection, diagnostic richness, and ASIL-B ready functional safety architecture.

FAQ

What is the maximum continuous current rating for OUT4 and OUT5?

OUT4 and OUT5 are rated for ±10.5 A peak sink/source current at VS = 13.5 V and T_j = 25 °C, with continuous operation limited to ±6 A due to thermal constraints. Their typical R_ON of 150 mΩ ensures <5.4 W conduction loss at 6 A, requiring adequate PCB copper area and heatsinking per PowerSO-36 thermal guidelines.

How does the programmable softstart function prevent inrush-related faults?

The softstart adjusts output slew rate via SPI register configuration to limit dI/dt during motor startup, preventing transient VS droop that could trigger undervoltage lockout (VSUV threshold = 5.7–7.2 V). It also avoids false open-load detection caused by initial high-impedance motor winding states before rotation begins.

Can the L9953TR drive a 12 V, 25 W mirror defroster?

No - OUT8 is rated for 6 A continuous (72 W at 12 V) but derates to ~4.2 A at T_j = 125 °C. A 25 W defroster draws ~2.1 A at 12 V, which is within spec; however, sustained 25 W operation exceeds thermal limits unless ambient is <65 °C and PCB thermal design meets ST's PowerSO-36 layout recommendations.

Is the CP (charge pump) pin compatible with discrete NMOS devices?

Yes - CP delivers VS+6 to VS+13 V at up to 300 µA, sufficient to fully enhance common automotive NMOS transistors (e.g., STP16NF06L, R_DS(on) = 60 mΩ @ V_GS = 10 V). External gate resistor (10–47 Ω) is recommended to damp ringing and limit peak current during turn-on.

L9953TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: PowerSO-36 Exposed Bottom Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Applications:: Door Actuator

Current - Supply:: 7mA

Voltage - Supply:: 7V ~ 28V

Operating Temperature:: -40°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSO-36

L9953TR FAQ

1.How can I place an order for L9953TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L9953TR 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 L9953TR reliable?

The price and inventory of L9953TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9953TR is usually 5 days.

3.What payment methods are accepted for L9953TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9953TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9953TR?

L9953TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9953TR 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 L9953TR?

For technical support, including L9953TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9953TR requirements.

6.How does Aetrix verify that L9953TR is sourced from the original manufacturer or authorized distributors?

All L9953TR 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 L9953TR meets industry standards.

7.What is the process for return or replacement of L9953TR?

All L9953TR units undergo pre-shipment inspection (PSI). If there is an issue with L9953TR, 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 L9953TR part is unused and in its original packaging.

Return procedure for L9953TR:

1.Submit a request within 90 days.

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

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