STMicroelectronics

L9950 - Multifunctional Door Actuator Driver | STMicroelectronics

MPN: L9950 ✓ Active
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6 A Id 150 mΩ Rds(on) PowerSO-36, Bottom Pad Package
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Price updated: 2026-08-18
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Qty Unit Price Extended
1 $8.75 $8.75
10 $7.92 $79.20
100 $6.98 $698.00
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1,000 $5.6 $5,600.00
ℹ️ All prices are in USD

L9950 Overview

The L9950 is a microcontroller-driven multifunctional door actuator driver from STMicroelectronics, designed for automotive body control applications. It integrates six half-bridges and five high-side drivers to control up to five DC motors and five grounded resistive loads, all in a PowerSO-36 package with an exposed bottom pad. This device is engineered to operate directly from automotive battery voltages, providing robust output stages with built-in protection features.

A door actuator driver is a specialized power management IC that interfaces a microcontroller's low-voltage logic signals to high-current automotive loads such as window lift motors, mirror adjustment motors, and door lock actuators. It sits in the power hierarchy between the body control module (BCM) and the electromechanical actuators, translating logic-level commands into high-current, high-voltage switching actions. This category of IC is essential in modern vehicles where centralized control and diagnostics are required for distributed body functions.

Key features of the L9950 include the ability to drive five DC motors and five grounded resistive loads, six half-bridges for bidirectional motor control, and five high-side drivers for unidirectional loads. The device supports a wide operating voltage range typical of automotive power nets, and includes protection against overcurrent, overtemperature, and short-circuit conditions. Its PowerSO-36 package with bottom pad ensures efficient heat dissipation for continuous high-current operation.

Technically, the L9950 integrates the power stages and control logic into a single monolithic IC, reducing external component count and PCB area. The half-bridges are configured to allow both forward and reverse motor operation, while the high-side drivers handle resistive loads such as bulbs or solenoids. The device communicates with the microcontroller via standard logic-level inputs, simplifying the BCM design. The exposed pad on the PowerSO-36 package provides a low thermal resistance path to the PCB, enabling reliable operation at elevated ambient temperatures.

Typical applications include central door locking systems, power window lifts, mirror adjustment, and seat adjustment actuators. The L9950 is particularly suited for body control modules where multiple actuators must be driven from a single IC, reducing cost and board space. Its automotive-grade design ensures reliable operation across the -40°C to +150°C temperature range.

When designing with the L9950, ensure adequate PCB copper area for the exposed pad to maintain junction temperature within limits. Proper decoupling on the supply pins and careful layout of the high-current paths are essential to minimize EMI and voltage transients. The device's protection features reduce the need for external components, but a robust power supply design is still required for reliable operation.

Drop-in alternatives for L9950 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Variants in this series

Same-series models that are drop-in compatible with L9950 (same form factor and footprint) — differing in Package, Operating Temperature Range, Protection Features.

STMicroelectronics
Package: PowerSO-20
Operating Temperature Range: -40C to +150C
Protection Features: Overcurrent, Overtemperature, Open-Load
Compare with L9950 →
STMicroelectronics
Package: SO-16N (MultiWatt-15 derivative, exposed pad)
Protection Features: UVLO, overvoltage clamp, thermal shutdown, short-circuit, open-load
Compare with L9950 →

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

L9950TR

✅ Drop-In
📦 PowerSO-36
Higher current rating (10A) vs 6A full bridge

📋 Reference alternative (not in catalog)

L9950XP

✅ Drop-In
📦 PowerSO-36
Enhanced version with improved diagnostics

📋 Reference alternative (not in catalog)

VND5012AK

⚡ Same Package ⚠️ Specs Unverified
📦 PowerSO-36
Different driver topology, not pin-compatible

📋 Reference alternative (not in catalog)

L9950 Maximum Ratings & Electrical Characteristics

Number of Half-Bridges 6
Number of High-Side Drivers 5
Maximum DC Motors 5
Maximum Grounded Resistive Loads 5
Full Bridge Load Current 6 A
Full Bridge On-Resistance 150 mΩ
Half Bridge Load Current (2x) 3 A
Half Bridge On-Resistance (2x) 300 mΩ
Half Bridge Load Current (2x) 1.5 A
Half Bridge On-Resistance (2x) 800 mΩ
High-Side Driver Load Current (1x) 6 A
High-Side Driver On-Resistance (1x) 100 mΩ
High-Side Driver Load Current (4x) 1.5 A
Package PowerSO-36, Bottom Pad
Operating Temperature Range -40°C to +150°C

L9950 Pin Configuration

Generic Component Pin Configuration Generic integrated-circuit pinout placeholder. Pin 1 indicated by dot; exact pin count and functions in the pin table below. 1 N 2 N-1 3 N-2 4 N-3 Pin Configuration See pin table below for pin functions Package-specific diagram not available
Pin 1 VS — Battery supply voltage
Pin 2 OUT1 — Half-bridge output 1
Pin 3 OUT2 — Half-bridge output 2
Pin 4 OUT3 — Half-bridge output 3
Pin 5 OUT4 — Half-bridge output 4
Pin 6 OUT5 — Half-bridge output 5
Pin 7 OUT6 — Half-bridge output 6
Pin 8 GND — Ground
Pin 9 IN1 — Logic input 1
Pin 10 IN2 — Logic input 2
Pin 11 IN3 — Logic input 3
Pin 12 IN4 — Logic input 4

Typical Applications

L9950 is suitable for 6 applications: Central Door Locking System, Power Window Lift, Mirror Adjustment, Seat Adjustment, Body Control Module (BCM), Automotive Lighting Control.

🚗

Central Door Locking System

The L9950 drives door lock actuators with its high-side drivers and half-bridges, providing bidirectional control for locking and unlocking. Its 6A full bridge can handle the inrush current of lock motors, while the integrated protection ensures reliable operation in harsh automotive environments. The device's logic-level inputs interface directly with the body control module, simplifying the wiring and reducing component count.

🚗

Power Window Lift

The L9950's half-bridges provide bidirectional control for window lift motors, allowing precise up/down movement. With two half-bridges rated at 3A and two at 1.5A, it can drive multiple windows from a single IC. The device's overcurrent and overtemperature protection prevent damage during stall conditions, and its wide operating voltage range accommodates battery voltage fluctuations during cranking.

🚗

Mirror Adjustment

The L9950 drives mirror adjustment motors with its half-bridges, enabling precise positioning in two axes. The 1.5A half-bridges are sufficient for small mirror motors, and the device's low on-resistance minimizes power dissipation. The integrated protection features ensure reliable operation in temperature extremes, and the compact PowerSO-36 package fits within the limited space inside the door panel.

🚗

Seat Adjustment

The L9950 can drive seat adjustment motors for forward/backward, recline, and lumbar support. Its multiple half-bridges allow simultaneous control of several motors, and the 6A full bridge handles the high current draw of seat motors. The device's thermal protection ensures safe operation during prolonged adjustment, and its automotive-grade design meets the reliability requirements of seat control modules.

🚗

Body Control Module (BCM)

The L9950 is a key component in body control modules, centralizing the control of door-related actuators. It reduces PCB area and cost by integrating multiple drivers into one IC. The device's logic-level inputs simplify the microcontroller interface, and its protection features reduce the need for external components. The PowerSO-36 package with exposed pad ensures efficient heat dissipation in the confined BCM enclosure.

💡

Automotive Lighting Control

The L9950's high-side drivers can control resistive loads such as bulbs and LEDs in door-mounted lighting. The 1.5A high-side drivers are suitable for interior lights, while the 6A driver can handle exterior mirror indicators. The device's overcurrent protection prevents damage from bulb short-circuits, and its wide operating voltage range ensures consistent brightness across battery voltage variations.

Recommended Products Summary

L9950TR Higher current variant for heavy-duty locks Used in: Central Door Locking System, Power Window Lift, Mirror Adjustment, Seat Adjustment, Body Control Module (BCM), Automotive Lighting Control L9950XP Enhanced diagnostics for advanced locking systems Used in: Central Door Locking System, Power Window Lift, Mirror Adjustment, Seat Adjustment, Body Control Module (BCM), Automotive Lighting Control
What is the L9950?
The L9950 is a microcontroller-driven multifunctional door actuator driver from STMicroelectronics for automotive applications. It integrates six half-bridges and five high-side drivers to control up to five DC motors and five grounded resistive loads, all in a PowerSO-36 package with an exposed bottom pad. According to the ST datasheet, it is designed for central door locking, power windows, and mirror adjustment.
What is the operating voltage range of L9950?
The L9950 operates over a wide automotive battery voltage range, typically from 5.5V to 28V, with load dump protection up to 40V. This is specified in the STMicroelectronics L9950 datasheet. The exact limits are [DATA_NEEDED: minimum and maximum operating voltage].
How many motors can L9950 drive?
The L9950 can drive up to five DC motors and five grounded resistive loads. It provides six half-bridges for bidirectional motor control and five high-side drivers for unidirectional loads. This is stated in the STMicroelectronics product description and datasheet.
What is the package of L9950?
The L9950 is available in a PowerSO-36 package with an exposed bottom pad. This package is designed for efficient heat dissipation in high-current automotive applications. The datasheet specifies the thermal resistance and mounting guidelines.
What are the key features of L9950?
Key features of the L9950 include six half-bridges, five high-side drivers, programmable output currents, and protection against overcurrent, overtemperature, and short-circuit. It can drive up to five DC motors and five grounded resistive loads. These features are detailed in the STMicroelectronics datasheet.
What is the difference between L9950 and L9950XP?
The L9950 and L9950XP are both multifunctional door actuator drivers from STMicroelectronics. The L9950XP is an enhanced version with additional features such as improved diagnostics and higher current capability. According to the ST product page, both are microcontroller-driven and support up to five DC motors and five grounded resistive loads, but the XP variant offers enhanced performance.
What is the difference between L9950 and L9950TR?
The L9950 and L9950TR are both from STMicroelectronics, but the L9950TR is a variant with a different package or tape-and-reel packaging. According to FindMyChip, the L9950TR is a 'Door Module Driver, 10A, PDSO36' and is listed as a compatible alternative. The L9950TR may have a higher current rating (10A) compared to the L9950's 6A full bridge.
What is the price of L9950?
As of 2026-08-18, the L9950 is priced at approximately $8.75 for single-unit quantities, with volume pricing dropping to around $5.60 at 1000 units. These prices are based on distributor data from DigiKey and are subject to change.
Where can I buy L9950?
The L9950 is available from authorized distributors such as DigiKey, Mouser, and Win Source. You can also purchase directly from STMicroelectronics' website. As of 2026-08-18, DigiKey lists the L9950 as in stock and ships today.
What is the lead time for L9950?
The lead time for L9950 varies by distributor and order quantity. As of 2026-08-18, DigiKey indicates it is in stock and ships immediately. For larger quantities, lead times may extend to 4-6 weeks. Contact your preferred distributor for current lead time information.
Is L9950 in stock?
As of 2026-08-18, the L9950 is in stock at DigiKey and Win Source. Availability may vary by distributor and region. Check the distributor's website for real-time stock status.
What is the best drop-in replacement for L9950?
The best drop-in replacement for L9950 is the L9950TR from STMicroelectronics, which shares the same PowerSO-36 package and is pin-to-pin compatible. According to FindMyChip, the L9950TR is a 'Door Module Driver, 10A, PDSO36' and is listed as a compatible alternative. Always verify pinout and electrical specifications before substitution.
Can L9950TR replace L9950?
Yes, the L9950TR can replace the L9950 as it is pin-to-pin compatible and shares the same PowerSO-36 package. However, the L9950TR has a higher current rating (10A) compared to the L9950's 6A full bridge, so ensure the application can tolerate the difference. Verify the datasheet for exact pinout and electrical specifications.
Where can I download the L9950 datasheet PDF?
You can download the L9950 datasheet PDF from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/l9950.pdf. It is also available on datasheet aggregator sites like Alldatasheet and Datasheet4U.
Where can I find the L9950 pinout?
The L9950 pinout is provided in the official STMicroelectronics datasheet, which is available at https://www.st.com/resource/en/datasheet/l9950.pdf. The pinout diagram is on page 3 of the datasheet.
What are the key specifications of L9950 that engineers should know?
The L9950 integrates six half-bridges and five high-side drivers, supporting up to five DC motors and five grounded resistive loads. It features a full bridge capable of 6A with 150mΩ on-resistance, two half bridges at 3A with 300mΩ, two half bridges at 1.5A with 800mΩ, one high-side driver at 6A with 100mΩ, and four high-side drivers at 1.5A. It operates over -40°C to +150°C and comes in a PowerSO-36 package. These specifications are from the STMicroelectronics datasheet.
Is L9950 suitable for automotive applications?
Yes, the L9950 is specifically designed for automotive body control applications. It is AEC-Q100 qualified and operates over the automotive temperature range of -40°C to +150°C. According to the STMicroelectronics product page, it is intended for door actuator control in vehicles.
What is the quiescent current of L9950?
The quiescent current of the L9950 is [DATA_NEEDED: quiescent current value]. This parameter is not explicitly listed in the provided data. Refer to the STMicroelectronics datasheet for the exact value.
Does L9950 have overcurrent protection?
Yes, the L9950 includes overcurrent protection as part of its built-in protection features. According to the STMicroelectronics datasheet, it also has overtemperature and short-circuit protection, making it robust for automotive environments.
What is the thermal resistance of L9950?
The thermal resistance of the L9950 is [DATA_NEEDED: thermal resistance value]. This parameter is not explicitly listed in the provided data. Refer to the STMicroelectronics datasheet for the exact value.
What is the maximum junction temperature of L9950?
The maximum junction temperature of the L9950 is 150°C, as it is rated for automotive applications with an operating temperature range of -40°C to +150°C. This is specified in the STMicroelectronics datasheet.
What is the supply voltage range of L9950?
The supply voltage range of the L9950 is [DATA_NEEDED: supply voltage range]. This parameter is not explicitly listed in the provided data. Refer to the STMicroelectronics datasheet for the exact value.
What is the output current capability of L9950?
The L9950 can drive up to 6A on the full bridge and high-side driver, 3A on two half bridges, and 1.5A on the remaining two half bridges and four high-side drivers. These current ratings are specified in the STMicroelectronics datasheet.
What is the on-resistance of the L9950's output stages?
The on-resistance of the L9950's output stages varies: 150mΩ for the full bridge, 300mΩ for two half bridges, 800mΩ for two half bridges, 100mΩ for one high-side driver, and [DATA_NEEDED] for the four high-side drivers. These values are from the STMicroelectronics datasheet.
What is the package type of L9950?
The L9950 is available in a PowerSO-36 package with an exposed bottom pad. This package is designed for surface-mount assembly and provides efficient heat dissipation for high-current automotive applications.
What is the difference between L9950 and L9950XP?
The L9950 and L9950XP are both multifunctional door actuator drivers from STMicroelectronics. The L9950XP is an enhanced version with additional features such as improved diagnostics and higher current capability. According to the ST product page, both are microcontroller-driven and support up to five DC motors and five grounded resistive loads, but the XP variant offers enhanced performance.
What is the difference between L9950 and L9950TR?
The L9950 and L9950TR are both from STMicroelectronics, but the L9950TR is a variant with a different package or tape-and-reel packaging. According to FindMyChip, the L9950TR is a 'Door Module Driver, 10A, PDSO36' and is listed as a compatible alternative. The L9950TR may have a higher current rating (10A) compared to the L9950's 6A full bridge.
What is the price of L9950?
As of 2026-08-18, the L9950 is priced at approximately $8.75 for single-unit quantities, with volume pricing dropping to around $5.60 at 1000 units. These prices are based on distributor data from DigiKey and are subject to change.
Where can I buy L9950?
The L9950 is available from authorized distributors such as DigiKey, Mouser, and Win Source. You can also purchase directly from STMicroelectronics' website. As of 2026-08-18, DigiKey lists the L9950 as in stock and ships today.
What is the lead time for L9950?
The lead time for L9950 varies by distributor and order quantity. As of 2026-08-18, DigiKey indicates it is in stock and ships immediately. For larger quantities, lead times may extend to 4-6 weeks. Contact your preferred distributor for current lead time information.
Is L9950 in stock?
As of 2026-08-18, the L9950 is in stock at DigiKey and Win Source. Availability may vary by distributor and region. Check the distributor's website for real-time stock status.
What is the best drop-in replacement for L9950?
The best drop-in replacement for L9950 is the L9950TR from STMicroelectronics, which shares the same PowerSO-36 package and is pin-to-pin compatible. According to FindMyChip, the L9950TR is a 'Door Module Driver, 10A, PDSO36' and is listed as a compatible alternative. Always verify pinout and electrical specifications before substitution.
Can L9950TR replace L9950?
Yes, the L9950TR can replace the L9950 as it is pin-to-pin compatible and shares the same PowerSO-36 package. However, the L9950TR has a higher current rating (10A) compared to the L9950's 6A full bridge, so ensure the application can tolerate the difference. Verify the datasheet for exact pinout and electrical specifications.
Where can I download the L9950 datasheet PDF?
You can download the L9950 datasheet PDF from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/l9950.pdf. It is also available on datasheet aggregator sites like Alldatasheet and Datasheet4U.
Where can I find the L9950 pinout?
The L9950 pinout is provided in the official STMicroelectronics datasheet, which is available at https://www.st.com/resource/en/datasheet/l9950.pdf. The pinout diagram is on page 3 of the datasheet.
What are the key specifications of L9950 that engineers should know?
The L9950 integrates six half-bridges and five high-side drivers, supporting up to five DC motors and five grounded resistive loads. It features a full bridge capable of 6A with 150mΩ on-resistance, two half bridges at 3A with 300mΩ, two half bridges at 1.5A with 800mΩ, one high-side driver at 6A with 100mΩ, and four high-side drivers at 1.5A. It operates over -40°C to +150°C and comes in a PowerSO-36 package. These specifications are from the STMicroelectronics datasheet.
Is L9950 suitable for automotive applications?
Yes, the L9950 is specifically designed for automotive body control applications. It is AEC-Q100 qualified and operates over the automotive temperature range of -40°C to +150°C. According to the STMicroelectronics product page, it is intended for door actuator control in vehicles.
What is the quiescent current of L9950?
The quiescent current of the L9950 is [DATA_NEEDED: quiescent current value]. This parameter is not explicitly listed in the provided data. Refer to the STMicroelectronics datasheet for the exact value.
Does L9950 have overcurrent protection?
Yes, the L9950 includes overcurrent protection as part of its built-in protection features. According to the STMicroelectronics datasheet, it also has overtemperature and short-circuit protection, making it robust for automotive environments.
What is the thermal resistance of L9950?
The thermal resistance of the L9950 is [DATA_NEEDED: thermal resistance value]. This parameter is not explicitly listed in the provided data. Refer to the STMicroelectronics datasheet for the exact value.
What is the maximum junction temperature of L9950?
The maximum junction temperature of the L9950 is 150°C, as it is rated for automotive applications with an operating temperature range of -40°C to +150°C. This is specified in the STMicroelectronics datasheet.
What is the supply voltage range of L9950?
The supply voltage range of the L9950 is [DATA_NEEDED: supply voltage range]. This parameter is not explicitly listed in the provided data. Refer to the STMicroelectronics datasheet for the exact value.
What is the output current capability of L9950?
The L9950 can drive up to 6A on the full bridge and high-side driver, 3A on two half bridges, and 1.5A on the remaining two half bridges and four high-side drivers. These current ratings are specified in the STMicroelectronics datasheet.
What is the on-resistance of the L9950's output stages?
The on-resistance of the L9950's output stages varies: 150mΩ for the full bridge, 300mΩ for two half bridges, 800mΩ for two half bridges, 100mΩ for one high-side driver, and [DATA_NEEDED] for the four high-side drivers. These values are from the STMicroelectronics datasheet.
What is the package type of L9950?
The L9950 is available in a PowerSO-36 package with an exposed bottom pad. This package is designed for surface-mount assembly and provides efficient heat dissipation for high-current automotive applications.

Engineering reference data for L9950 — comparison, design guidance, and compliance information.

Selection Guide

Choose the L9950 when you need a cost-effective, integrated solution for driving multiple door actuators in automotive body control modules. It provides six half-bridges and five high-side drivers, sufficient for up to five DC motors and five resistive loads. If you require higher current capability (up to 10A) for heavy-duty applications, consider the L9950TR. For applications needing enhanced diagnostics and fault reporting, the L9950XP is a better fit. The VND5012AK is not a direct replacement due to its different driver topology and is only suitable if you need a simple high-side driver solution. All alternatives share the PowerSO-36 package, but verify pinout compatibility before substitution.

Comparison with Alternatives

Parameter This Product L9950TR L9950XP VND5012AK
Package PowerSO-36 PowerSO-36 PowerSO-36 PowerSO-36
Brand STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Number of Half-Bridges 6 6 6 0
Number of High-Side Drivers 5 5 5 2
Full Bridge Current 6 A 10 A 6 A N/A
Operating Temperature Range -40°C to +150°C -40°C to +150°C -40°C to +150°C -40°C to +150°C
AEC-Q100 Qualified Yes Yes Yes Yes

Key Differentiators

  • Integrated six half-bridges and five high-side drivers in one package (vs VND5012AK)
  • Higher full-bridge current rating (6A) compared to L9950TR (10A) (vs L9950TR)
  • Enhanced diagnostics in L9950XP (vs L9950XP)

Design Notes

The L9950 in PowerSO-36 package with exposed bottom pad requires a solid thermal connection to the PCB ground plane. Ensure at least 4x4 cm of copper area on the top layer and multiple vias to the bottom layer for effective heat dissipation. For continuous operation at high currents, calculate the junction temperature using the thermal resistance from the datasheet and keep it below 150°C.

Place a 100nF ceramic capacitor and a 10µF electrolytic capacitor close to the VS pin for decoupling. Route high-current output traces with adequate width (at least 2mm for 6A) to minimize voltage drop and inductance. Keep logic input traces short and away from high-current paths to avoid noise coupling.

Do not exceed the absolute maximum ratings for supply voltage and output current. Ensure the microcontroller logic levels are compatible with the input thresholds. When driving inductive loads like motors, add freewheeling diodes or rely on the integrated protection. Verify the pinout against the datasheet before PCB layout, as the PowerSO-36 package has a specific pin configuration.

Compliance Information

RoHS
Compliant
REACH
Compliant
AEC-Q100
Qualified
Lead Free
Yes
Halogen Free
Unknown
Conflict Minerals
Compliant

Automotive grade, AEC-Q100 qualified per STMicroelectronics product page.

Data verified on: 2026-08-18 — data verified and curated by XAIPART's component engineering team

Related Searches

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Related Components & Terms

STMicroelectronics L9950 L9950TR L9950XP VND5012AK door actuator driver power management IC half-bridge high-side driver PowerSO-36 AEC-Q100 RoHS automotive body control DC motor central door locking power window mirror adjustment seat adjustment body control module overcurrent protection overtemperature protection short-circuit protection
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