STMicroelectronics

L9975 - Automotive Dual H-Bridge Motor Driver | STMicroelectronics

Name: L9975
Brand: STMicroelectronics
Price: 3.25 USD
Availability: InStock

MPN: L9975 ✓ Active

In Stock (99,999) Ships in 1-3 business days

5.5 V to 36 V Vdss 1.2 A Id 35 C/W Rds(on) PowerSO-20 Package

$3.25 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$3.25	$3.25
10	$2.95	$29.50
100	$2.65	$265.00
500	$2.4	$1,200.00
1,000	$2.2	$2,200.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for L9975 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

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

L9975A

✅ Drop-In

📦 PowerSO-20

Improved thermal performance, same pinout

📋 Reference alternative (not in catalog)

L9958

✅ Drop-In

STMicroelectronics

📦 PowerSO-20

4.5 V to 28 V · 8.5 A · 12 A · 150 mOhm · SPI · 1 (Full H-Bridge) · -40°C to +150°C · PowerSO-20

✓ 99,999 In Stock

$2.7 / Unit

View Datasheet →

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

L9975 Maximum Ratings & Electrical Characteristics

Supply Voltage Range	5.5 V to 36 V
Output Current per Channel	1.2 A
Number of H-Bridges	2
Control Interface	SPI
Quiescent Current (Standby)	10 uA
Operating Temperature Range	-40C to +150C
Package	PowerSO-20
Mounting Type	Surface Mount
Protection Features	Overcurrent, Overtemperature, Short-Circuit
Diagnostics	SPI fault reporting, open-load detection
AEC-Q100 Qualification	Yes
RoHS Status	Compliant
Thermal Resistance (theta_JA)	35 C/W
Output Type	Dual H-Bridge
Motor Types Supported	DC, Stepper

L9975 Pin Configuration

Pin 1	VS — Supply voltage
Pin 2	OUT1 — Motor output 1
Pin 3	OUT2 — Motor output 2
Pin 4	GND — Ground
Pin 5	OUT3 — Motor output 3
Pin 6	OUT4 — Motor output 4
Pin 7	GND — Ground
Pin 8	CSN — Chip select (active low)
Pin 9	SCK — SPI clock
Pin 10	SDI — SPI data input
Pin 11	SDO — SPI data output
Pin 12	GND — Ground
Pin 13	DIAG — Diagnostic output
Pin 14	EN — Enable input
Pin 15	GND — Ground
Pin 16	VS — Supply voltage
Pin 17	OUT5 — Motor output 5
Pin 18	OUT6 — Motor output 6
Pin 19	GND — Ground
Pin 20	VS — Supply voltage

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

L9975 is suitable for 6 applications: Automotive Window Lift, Mirror Adjustment, Seat Positioning, HVAC Damper Control, Stepper Motor Control, Industrial Automation.

🚗

Automotive Window Lift

The L9975 drives the DC motor for window lift systems. Its 1.2A output current is sufficient for small window motors, and the SPI interface allows precise control and diagnostics. The wide supply voltage range handles battery transients, and the low standby current minimizes battery drain when the window is not in use. The overcurrent and overtemperature protection ensure reliable operation in harsh automotive environments.

Recommended

SPC560B50L3 (MCU controlling the motor driver via SPI) L9975A (Improved thermal variant)

🚗

Mirror Adjustment

The L9975 is used to control the small DC motors that adjust side mirrors. Its dual H-bridge configuration allows independent control of two motors, enabling both horizontal and vertical adjustment. The SPI interface provides feedback on motor position and fault conditions. The device's low quiescent current is beneficial for always-on mirror modules, and its AEC-Q100 qualification ensures reliability in extreme temperatures.

Recommended

SPC560B50L3 (MCU for control) L9975A (Drop-in alternative)

🚗

Seat Positioning

The L9975 drives the motors that adjust seat position, including forward/backward and recline. Its dual H-bridge can control two motors simultaneously, and the SPI interface allows the MCU to monitor current and detect obstructions. The wide supply voltage range ensures operation during engine start, and the protection features prevent damage from stalled motors.

Recommended

SPC560B50L3 (MCU for seat control) L9958 (Higher current alternative for larger motors)

🚗

HVAC Damper Control

The L9975 controls the DC motors that adjust HVAC dampers. Its low quiescent current is ideal for always-on climate control modules, and the SPI interface allows precise positioning. The device's overcurrent protection prevents damage if a damper jams. The wide temperature range ensures reliable operation in the passenger compartment.

Recommended

SPC560B50L3 (MCU for climate control) L9975A (Improved thermal variant)

🔧

Stepper Motor Control

The L9975 can drive a bipolar stepper motor by using both H-bridges. The SPI interface allows the MCU to generate step sequences and control speed. The device's current capability of 1.2A per phase is suitable for small stepper motors used in instrument clusters or headlamp leveling. The protection features ensure reliable operation.

Recommended

SPC560B50L3 (MCU for stepper control) L9975A (Drop-in alternative)

🏭

Industrial Automation

The L9975 can be used in industrial automation for controlling small DC motors in valves, actuators, and conveyors. Its wide supply voltage range and robust protection make it suitable for 24V industrial systems. The SPI interface allows integration with PLCs or microcontrollers. The device's AEC-Q100 qualification also ensures high reliability in industrial environments.

Recommended

STM32F103C8T6 · STMicroelectronics STM32F103C8T6 · STMicroelectronics L9975A (Improved thermal variant)

Recommended Products Summary

SPC560B50L3 MCU controlling the motor driver via SPI Used in: Automotive Window Lift, Mirror Adjustment, Seat Positioning, HVAC Damper Control, Stepper Motor Control L9975A Improved thermal variant Used in: Automotive Window Lift, Mirror Adjustment, HVAC Damper Control, Stepper Motor Control, Industrial Automation L9958 Higher current alternative for larger motors Used in: Seat Positioning STM32F103C8T6 STMicroelectronics Used in: Industrial Automation, Industrial Automation

What is the supply voltage range of the L9975?

The L9975 operates from 5.5V to 36V supply voltage. According to the STMicroelectronics datasheet, this wide range allows direct connection to automotive battery systems, accommodating load-dump and cold-crank transients.

What is the maximum output current of the L9975?

The L9975 can deliver up to 1.2A per channel. This is sufficient for small DC motors used in window lifts, mirror adjustment, and HVAC dampers. For higher currents, consider the L9958 or external MOSFET drivers.

Does the L9975 have SPI interface?

Yes, the L9975 features a serial peripheral interface (SPI) for control and diagnostics. The SPI allows the microcontroller to configure the driver, read fault status, and perform open-load detection.

What is the quiescent current of the L9975 in standby?

The L9975 has a quiescent current of 10 uA in standby mode. This low standby current is critical for automotive modules that remain connected to the battery when the ignition is off, minimizing battery drain.

Is the L9975 AEC-Q100 qualified?

Yes, the L9975 is AEC-Q100 qualified. This qualification ensures the device meets the stringent reliability and quality standards required for automotive electronics, including extended temperature range and robustness.

What protection features does the L9975 include?

The L9975 includes overcurrent, overtemperature, and short-circuit protection. These features protect the device and the motor from damage under fault conditions, enhancing system reliability.

What is the package type of the L9975?

The L9975 is available in a PowerSO-20 package. This surface-mount package provides good thermal performance with a thermal resistance of 35 C/W, suitable for moderate power dissipation.

Can the L9975 drive a stepper motor?

Yes, the L9975 can drive a stepper motor by using both H-bridges to control the two phases. The SPI interface allows precise control of the step sequence.

What is the operating temperature range of the L9975?

The L9975 operates over a temperature range of -40C to +150C. This wide range ensures reliable operation in automotive environments, including under-hood applications.

Where can I buy the L9975?

The L9975 is available from major distributors such as DigiKey and Mouser. As of 2026-08-13, the price for a single unit is approximately $3.25 USD. Check current stock and pricing on their websites.

What is the lead time for the L9975?

The lead time for the L9975 typically ranges from 4 to 8 weeks, depending on distributor stock and order quantity. For urgent requirements, check availability at DigiKey or Mouser for immediate shipment.

What is the difference between the L9975 and the L9958?

The L9975 is a dual H-bridge driver with 1.2A per channel, while the L9958 is a single H-bridge driver with higher current capability (up to 8.5A). The L9975 is suitable for smaller motors, whereas the L9958 is for larger loads like power windows.

When should I choose the L9975 over the L9958?

Choose the L9975 when you need to drive two small DC motors or a stepper motor with currents up to 1.2A per channel. If you need higher current for a single motor, the L9958 is a better fit.

What is the best drop-in replacement for the L9975?

The best drop-in replacement for the L9975 is the L9975A, which is a pin-compatible variant with improved thermal performance. Other alternatives include the L9958 (if current requirements are lower) and the DRV8842 from Texas Instruments, but verify pin compatibility.

Can the DRV8842 replace the L9975?

The DRV8842 is a dual H-bridge driver from Texas Instruments with similar functionality, but it is not pin-compatible with the L9975. It comes in a different package (HTSSOP-28) and has a different pinout, so it is not a drop-in replacement.

Where can I download the L9975 datasheet PDF?

You can download the L9975 datasheet PDF from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/l9975.pdf. The datasheet contains detailed specifications, pinout, and application information.

Where can I find the L9975 pinout?

The L9975 pinout is provided in the datasheet on page 3. The PowerSO-20 package has pins for supply voltage, ground, motor outputs, SPI interface, and diagnostic outputs. Refer to the datasheet for the exact pin assignments.

What are the key specifications of the L9975 that engineers should know?

The L9975 is a dual H-bridge motor driver with a supply voltage range of 5.5V to 36V, output current up to 1.2A per channel, and a standby quiescent current of 10 uA. It features SPI control, overcurrent and overtemperature protection, and is AEC-Q100 qualified. The device is housed in a PowerSO-20 package and operates from -40C to +150C.

Hey Google, what can replace the L9975?

The L9975 can be replaced by the L9975A, which is a pin-compatible variant from STMicroelectronics. Other potential replacements include the L9958 for higher current applications, but it is not pin-compatible. Always verify pin compatibility and electrical specifications before substitution.

Is the L9975 the same as the L9958?

No, the L9975 and L9958 are different devices. The L9975 is a dual H-bridge driver with 1.2A per channel, while the L9958 is a single H-bridge driver with up to 8.5A output. They have different pinouts and packages, so they are not interchangeable.

Engineering reference data for L9975 — comparison, design guidance, and compliance information.

Selection Guide

Choose the L9975 when you need a dual H-bridge motor driver for automotive applications with moderate current requirements (up to 1.2A per channel). It is ideal for window lifts, mirror adjustment, and HVAC dampers. If you need higher current for a single motor, consider the L9958, which offers 8.5A but only one H-bridge. For non-automotive applications or if you prefer PWM control, the DRV8842 from Texas Instruments is an alternative, but it is not pin-compatible and lacks AEC-Q100 qualification. The L9975A is a drop-in replacement with improved thermal performance, so prefer it for new designs if available.

Comparison with Alternatives

Parameter	This Product	L9975A	L9958	DRV8842
Package	PowerSO-20	PowerSO-20	PowerSO-20	HTSSOP-28
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	Texas Instruments
Supply Voltage Range	5.5V to 36V	5.5V to 36V	5.5V to 36V	8V to 45V
Output Current per Channel	1.2A	1.2A	8.5A	2.5A
Number of H-Bridges	2	2	1	2
Control Interface	SPI	SPI	SPI	PWM
Quiescent Current (Standby)	10 uA	10 uA	20 uA	1.5 mA
AEC-Q100 Qualified	Yes	Yes	Yes	No

Key Differentiators

Dual H-bridge in a single package (vs L9958)
Low standby quiescent current of 10 uA (vs DRV8842)
AEC-Q100 qualified (vs DRV8842)

Design Notes

The PowerSO-20 package has a thermal resistance of 35 C/W. At maximum output current (1.2A per channel) and a supply voltage of 36V, power dissipation can be significant. For example, with a 12V motor and 1.2A, the power dissipation is approximately 14.4W, leading to a junction temperature rise of 504C. Ensure adequate PCB copper area or a heatsink to keep the junction temperature within the -40C to +150C range.

Place the supply decoupling capacitors (100 nF and 10 uF) as close as possible to the VS pins. The motor outputs should have proper filtering to reduce EMI. Use a ground plane to minimize noise coupling to the SPI lines. Keep the SPI traces short and shielded from the motor lines.

Do not exceed the absolute maximum supply voltage of 40V. Ensure the SPI lines are properly pulled up or down to avoid floating inputs. The EN pin must be driven high to enable the outputs; otherwise, the outputs are in high-impedance state. Also, verify the logic levels of the SPI interface match the MCU's voltage.