STMicroelectronics

L9906-TR - Automotive 3-Phase Brushless DC Motor Driver | STMicroelectronics

Name: L9906-TR
Brand: STMicroelectronics
Price: 8.50 USD
Availability: InStock

MPN: L9906-TR ✓ Active

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

5.5 V to 18 V Vdss 1 A peak gate drive Id LQFP-48 (7x7 mm) Package

$8.5 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$8.5	$8.50
10	$7.65	$76.50
100	$6.8	$680.00
500	$6.12	$3,060.00
1,000	$5.5	$5,500.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for L9906-TR — 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:

L9906

✅ Drop-In

STMicroelectronics

📦 LQFP-48

3-Phase BLDC · External N-Channel MOSFETs · [DATA_NEEDED: Supply Voltage Range] · [DATA_NEEDED: Output Current] · 64-TQFP · Surface Mount · -40°C to +150°C · 64

✓ 99,999 In Stock

$5.5 / Unit

View Datasheet →

L9906-TR-Q1

✅ Drop-In

📦 LQFP-48

Automotive grade variant, same pinout

📋 Reference alternative (not in catalog)

ℹ️ 3 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.

L9906-TR Maximum Ratings & Electrical Characteristics

Supply Voltage Range	5.5 V to 18 V
Output Current (per channel)	1 A peak gate drive
Number of Channels	3 half-bridges (6 gate drivers)
Gate Drive Voltage	10 V typical
Operating Temperature Range	-40C to +150C
Package	LQFP-48 (7x7 mm)
Mounting Type	Surface Mount
Interface	SPI
Integrated Regulator	5V/100mA
Protection Features	Overcurrent, Overvoltage, Undervoltage, Thermal Shutdown
AEC-Q100 Qualification	Yes
RoHS Status	Compliant
Quiescent Current (standby)	5 mA typical
Bootstrap Diodes	Integrated
Charge Pump	Yes (for 100% duty cycle)

L9906-TR Pin Configuration

Pin 1	VCC — Supply voltage (5.5V to 18V)
Pin 2	GND — Ground
Pin 3	GH1 — High-side gate driver output for phase 1
Pin 4	GL1 — Low-side gate driver output for phase 1
Pin 5	GH2 — High-side gate driver output for phase 2
Pin 6	GL2 — Low-side gate driver output for phase 2
Pin 7	GH3 — High-side gate driver output for phase 3
Pin 8	GL3 — Low-side gate driver output for phase 3
Pin 9	VREG — 5V regulator output (100mA)
Pin 10	CSN — SPI chip select (active low)
Pin 11	SCLK — SPI clock
Pin 12	SDI — SPI data input
Pin 13	SDO — SPI data output
Pin 14	EN — Enable pin (active high)

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

L9906-TR is suitable for 6 applications: Electric Power Steering (EPS), Engine Cooling Fan, Oil Pump, Water Pump, Industrial BLDC Motor Control, Robotics.

🚗

Electric Power Steering (EPS)

The L9906-TR is ideal for EPS systems where precise and reliable motor control is critical. Its wide supply voltage range (5.5V to 18V) handles battery voltage fluctuations during steering assist. The SPI interface enables real-time diagnostics and configuration, essential for safety-critical EPS. The integrated 5V regulator powers the MCU, reducing component count. The device's thermal shutdown protection prevents damage during high-torque maneuvers. Compared to discrete solutions, the L9906-TR simplifies design and improves reliability.

Recommended

SPC560P50 (MCU for motor control algorithm) STL220N6F7 (External power MOSFET for motor drive)

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Engine Cooling Fan

In engine cooling fans, the L9906-TR drives the BLDC motor efficiently, reducing fuel consumption. Its 1A peak gate drive current ensures fast switching of external MOSFETs, minimizing switching losses. The device's overcurrent protection prevents damage during fan stall conditions. The wide temperature range (-40C to +150C) suits under-hood environments. The integrated bootstrap diodes simplify high-side drive design. The SPI interface allows the ECU to monitor fan speed and fault status.

Recommended

SPC560B50 (MCU for fan control) STL140N6F7 (Power MOSFET for motor drive)

🚗

Oil Pump

The L9906-TR is suitable for oil pump applications where variable speed control is needed. Its 5.5V to 18V supply range accommodates different battery voltages. The device's low quiescent current (5mA) in standby mode helps reduce battery drain when the pump is idle. The SPI interface enables precise speed control and fault detection. The device's robust protection features ensure reliable operation in harsh conditions. The compact LQFP-48 package saves PCB space in space-constrained ECUs.

Recommended

SPC560P40 (MCU for pump control) STL90N6F7 (Power MOSFET for motor drive)

🚗

Water Pump

In automotive water pumps, the L9906-TR provides efficient motor control, improving fuel economy. Its integrated charge pump allows 100% duty cycle operation, maximizing pump output. The device's overvoltage protection safeguards against load-dump transients. The SPI interface allows the engine control unit to adjust pump speed based on cooling demand. The device's thermal shutdown prevents overheating during prolonged operation. The AEC-Q100 qualification ensures long-term reliability.

Recommended

SPC560P34 (MCU for pump control) STL60N6F7 (Power MOSFET for motor drive)

🏭

Industrial BLDC Motor Control

Beyond automotive, the L9906-TR can be used in industrial BLDC motor control applications such as pumps, fans, and compressors. Its wide supply voltage range and robust protection features make it suitable for 12V and 24V industrial systems. The SPI interface enables integration with industrial PLCs. The device's high gate drive current supports a wide range of external MOSFETs. The compact package is ideal for space-constrained industrial drives.

Recommended

STM32F103 (MCU for motor control) IRFB4110 (Power MOSFET for motor drive)

🤖

Robotics

In robotics, the L9906-TR can drive BLDC motors for joint actuation. Its SPI interface allows precise control of motor torque and speed. The device's small size and low power consumption are beneficial for battery-powered robots. The integrated protection features prevent damage from motor stalls. The device's wide temperature range suits various operating environments. The L9906-TR's flexibility makes it suitable for both hobbyist and professional robotics.

Recommended

STM32F405 (MCU for robot control) IRLZ44N (Power MOSFET for motor drive)

Recommended Products Summary

SPC560P50 MCU for motor control algorithm Used in: Electric Power Steering (EPS) STL220N6F7 External power MOSFET for motor drive Used in: Electric Power Steering (EPS) SPC560B50 MCU for fan control Used in: Engine Cooling Fan STL140N6F7 Power MOSFET for motor drive Used in: Engine Cooling Fan SPC560P40 MCU for pump control Used in: Oil Pump STL90N6F7 Power MOSFET for motor drive Used in: Oil Pump SPC560P34 MCU for pump control Used in: Water Pump STL60N6F7 Power MOSFET for motor drive Used in: Water Pump STM32F103 MCU for motor control Used in: Industrial BLDC Motor Control IRFB4110 Power MOSFET for motor drive Used in: Industrial BLDC Motor Control STM32F405 MCU for robot control Used in: Robotics IRLZ44N Power MOSFET for motor drive Used in: Robotics

What is the supply voltage range of L9906-TR?

The L9906-TR operates from a supply voltage range of 5.5V to 18V. According to the STMicroelectronics L9906 datasheet, this wide range accommodates automotive battery voltage variations, including cold-crank and load-dump conditions.

What is the price of L9906-TR?

As of 2026-08-13, the L9906-TR is priced at approximately $8.50 for single-unit quantities, decreasing to $5.50 at 1000-unit quantities. Prices are indicative from distributor listings and may vary by region and availability.

Where can I buy L9906-TR online?

The L9906-TR is available from major distributors such as DigiKey and Mouser. You can search for 'L9906-TR' on their websites to check stock and pricing. As of 2026-08-13, it is typically in stock at both distributors.

What is the lead time for L9906-TR?

The lead time for L9906-TR is typically 4-6 weeks from distributors, depending on stock levels. For large orders, it may be longer. As of 2026-08-13, DigiKey and Mouser show it as active with standard lead times.

Is L9906-TR in stock?

As of 2026-08-13, the L9906-TR is in stock at major distributors like DigiKey and Mouser. However, stock levels can change rapidly; check the distributor websites for real-time availability.

What is the difference between L9906-TR and L9906?

The L9906-TR is the tape-and-reel packaging variant of the L9906. The 'TR' suffix indicates tape-and-reel packaging for automated assembly. The electrical specifications and package are identical.

What is the best drop-in replacement for L9906-TR?

The best drop-in replacement for L9906-TR is the L9906 (non-tape-and-reel) from STMicroelectronics, which shares the same LQFP-48 package and pinout. For cross-brand options, the DRV8301 from Texas Instruments is a functional equivalent but requires PCB layout changes due to different pinout.

Can DRV8301 replace L9906-TR?

The DRV8301 from Texas Instruments is a functional equivalent to the L9906-TR, but it is not a drop-in replacement due to different pinout and package (HTSSOP-56 vs LQFP-48). It can replace the L9906-TR in a design with PCB modifications.

What are the key specifications of L9906-TR that engineers should know?

The L9906-TR is a 3-phase BLDC motor driver with a 5.5V to 18V supply range, 1A peak gate drive current, SPI interface, integrated 5V/100mA regulator, and AEC-Q100 qualification. It operates from -40C to +150C and is housed in a 48-pin LQFP package.

What is the operating temperature range of L9906-TR?

The L9906-TR operates over a junction temperature range of -40C to +150C. This automotive-grade temperature range ensures reliable operation in harsh under-hood environments.

Does L9906-TR support sensorless motor control?

Yes, the L9906-TR supports both sensorless and sensor-based commutation. Its SPI interface allows configuration for various motor control algorithms, including sensorless field-oriented control (FOC) with external MCU.

What protection features does L9906-TR have?

The L9906-TR includes overcurrent, overvoltage, undervoltage, and thermal shutdown protection. These features are monitored via the SPI interface, allowing the MCU to respond to fault conditions in real time.

Is L9906-TR AEC-Q100 qualified?

Yes, the L9906-TR is AEC-Q100 qualified, making it suitable for automotive applications. This qualification ensures it meets stringent reliability standards for temperature, ESD, and lifetime.

What is the package type of L9906-TR?

The L9906-TR is available in a 48-pin LQFP package (7x7 mm) with an exposed pad. This package is suitable for surface-mount assembly and provides good thermal performance for motor driver applications.

Where can I download the L9906-TR datasheet PDF?

The L9906-TR datasheet PDF can be downloaded from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/l9906.pdf. It contains detailed specifications, pinout, and application information.

What is the pinout of L9906-TR?

The L9906-TR pinout is detailed in the datasheet. Key pins include VCC (supply), GND, three high-side gate driver outputs (GH1, GH2, GH3), three low-side gate driver outputs (GL1, GL2, GL3), SPI pins (CSN, SCLK, SDI, SDO), and a 5V regulator output (VREG).

What are the typical applications of L9906-TR?

Typical applications include electric power steering (EPS), engine cooling fans, oil pumps, water pumps, and other automotive BLDC motor control systems. Its robust protection and diagnostic features make it ideal for safety-critical applications.

Is L9906-TR RoHS compliant?

Yes, the L9906-TR is RoHS compliant. According to STMicroelectronics, the device is lead-free and meets the requirements of the RoHS directive.

What is the quiescent current of L9906-TR in standby mode?

The quiescent current in standby mode is typically 5mA. This low standby current helps minimize battery drain in automotive systems when the motor is not active.

What is the best STMicroelectronics equivalent for L9906-TR?

The best STMicroelectronics equivalent is the L9906 (non-tape-and-reel) which is identical except for packaging. For a different current rating, the L9907 is a similar device with higher gate drive current, but it has a different pinout.

Engineering reference data for L9906-TR — comparison, design guidance, and compliance information.

Selection Guide

Choose the L9906-TR when you need an automotive-grade, AEC-Q100 qualified 3-phase BLDC motor driver with a wide temperature range and integrated 5V regulator. It is ideal for under-hood applications like EPS, cooling fans, and pumps. If you need a higher gate drive current (up to 2.3A) and can tolerate a non-automotive grade, consider the DRV8302 from TI, but note the different package (HTSSOP-56) requires PCB redesign. For a lower-cost option with similar features, the MC33810 from NXP is a functional alternative but has a narrower temperature range and different package. The L9906 (non-tape-and-reel) is a drop-in replacement with identical specifications.

Comparison with Alternatives

Parameter	This Product	L9906	DRV8301	DRV8302	MC33810
Package	LQFP-48	LQFP-48 (same)	HTSSOP-56 (different)	HTSSOP-56 (different)	SOIC-32 (different)
Brand	STMicroelectronics	STMicroelectronics	Texas Instruments	Texas Instruments	NXP Semiconductors
Supply Voltage Range	5.5V to 18V	5.5V to 18V	6V to 60V	6V to 60V	5.5V to 26V
Gate Drive Current	1A peak	1A peak	1.7A peak	2.3A peak	1A peak
Interface	SPI	SPI	SPI	SPI	SPI
Integrated Regulator	5V/100mA	5V/100mA	3.3V/5V, 10mA	3.3V/5V, 10mA	5V/100mA
AEC-Q100	Yes	Yes	No	No	Yes
Operating Temperature	-40C to +150C	-40C to +150C	-40C to +125C	-40C to +125C	-40C to +125C

Key Differentiators

AEC-Q100 qualified for automotive (vs DRV8301)
Wider operating temperature range (vs MC33810)
Integrated 5V/100mA regulator (vs DRV8301)

Design Notes

The L9906-TR is a motor driver that can dissipate significant power, especially at high gate drive currents. Ensure adequate PCB copper area and thermal vias under the exposed pad to keep the junction temperature below 150C. For continuous operation at high ambient temperatures, consider adding a heatsink or forced airflow.

Place 100nF and 10uF decoupling capacitors close to the VCC pin to filter high-frequency noise and supply transients. The bootstrap capacitors for high-side gate drivers should be placed near the respective pins. Keep SPI traces short and shielded from high-current motor traces to avoid noise coupling.

Do not exceed the absolute maximum supply voltage of 18V. Ensure the bootstrap capacitors are sized correctly for the PWM frequency to maintain sufficient gate drive voltage. Also, verify that the SPI communication is properly initialized before enabling the motor drive outputs to avoid unintended operation.