STMicroelectronics

L9904TR - Automotive 3-Phase Brushless DC Motor Driver | STMicroelectronics

Name: L9904TR
Brand: STMicroelectronics
Price: 4.85 USD
Availability: InStock

MPN: L9904TR ✓ Active

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

5.5 V to 28 V Vdss 1 A source / 2 A sink Id LQFP-48 (EP) Package

$4.85 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$4.85	$4.85
10	$4.36	$43.60
100	$3.88	$388.00
500	$3.49	$1,745.00
1,000	$3.1	$3,100.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for L9904TR — 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:

L9904

✅ Drop-In

STMicroelectronics

📦 LQFP-48 (EP)

5.5 V to 40 V · 1 A (source/sink) · 3 (triple half-bridge) · Yes (100% duty cycle) · SPI · Overcurrent, overvoltage, thermal shutdown · -40°C to +150°C · LQFP-48 (7x7 mm)

✓ 99,999 In Stock

$5.44 / Unit

View Datasheet →

L9904TR-Q1

✅ Drop-In

📦 LQFP-48 (EP)

Automotive grade variant, same pinout

📋 Reference alternative (not in catalog)

ℹ️ 2 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.

L9904TR Maximum Ratings & Electrical Characteristics

Function	3-Phase BLDC Motor Driver
Supply Voltage Range	5.5 V to 28 V
Gate Drive Current	1 A source / 2 A sink
LDO Output Voltage	5 V or 3.3 V (selectable)
LDO Output Current	100 mA
Charge Pump	Integrated for high-side gate drive
Interface	SPI
Protection Features	Overcurrent, overvoltage, undervoltage, thermal shutdown
Operating Temperature	-40C to +150C
Package	LQFP-48 (EP)
Mounting Type	Surface Mount
AEC-Q100	Qualified
RoHS	Compliant
Number of Channels	3-phase
Output Configuration	External N-channel MOSFETs

L9904TR Pin Configuration

Pin 1	VCC — Power supply input
Pin 2	GND — Ground
Pin 3	VREG — LDO output
Pin 4	EN — Enable input
Pin 5	SPI_CLK — SPI clock
Pin 6	SPI_CS — SPI chip select
Pin 7	SPI_MOSI — SPI data input
Pin 8	SPI_MISO — SPI data output
Pin 9	GH_A — High-side gate drive phase A
Pin 10	GL_A — Low-side gate drive phase A
Pin 11	GH_B — High-side gate drive phase B
Pin 12	GL_B — Low-side gate drive phase B
Pin 13	GH_C — High-side gate drive phase C
Pin 14	GL_C — Low-side gate drive phase C
Pin 15	CP — Charge pump output
Pin 16	BST_A — Bootstrap capacitor phase A
Pin 17	BST_B — Bootstrap capacitor phase B
Pin 18	BST_C — Bootstrap capacitor phase C

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

L9904TR is suitable for 6 applications: Engine Cooling Fan, Electric Oil Pump, Water Pump, HVAC Blower, Industrial BLDC Motor Control, Electric Power Steering (EPS).

🚗

Engine Cooling Fan

The L9904TR drives the BLDC motor in engine cooling fans, providing reliable operation in high-temperature environments. Its wide input voltage range (5.5V-28V) handles load dump transients, and the integrated LDO powers the MCU. The gate drive current (1A/2A) ensures fast switching of external MOSFETs, reducing power loss. The SPI interface allows real-time diagnostics and protection threshold configuration, essential for automotive reliability.

Recommended

STM32F103 (MCU for motor control) IRF3205 (External power MOSFET)

🚗

Electric Oil Pump

In electric oil pumps, the L9904TR provides precise control of the BLDC motor, ensuring consistent oil pressure. The device's AEC-Q100 qualification and -40C to +150C operating range make it suitable for under-hood applications. The charge pump enables high-side N-channel MOSFETs, improving efficiency. The integrated protection features prevent damage from overcurrent and thermal stress, extending the pump's lifespan.

Recommended

STM32F030 (MCU for control) IPD053N06N (MOSFET for power stage)

🚗

Water Pump

The L9904TR is ideal for water pumps in automotive cooling systems. Its compact LQFP-48 package fits in space-constrained ECUs. The integrated LDO provides a clean 5V rail for the MCU, reducing external components. The SPI interface allows the MCU to monitor motor current and fault conditions, enabling predictive maintenance. The device's robust protection ensures reliable operation in harsh environments.

Recommended

STM32G0 (MCU for control) BUK9Y30-80B (MOSFET for power stage)

🚗

HVAC Blower

In HVAC blowers, the L9904TR provides smooth and efficient motor control. The device's low quiescent current and high gate drive current enable efficient PWM operation, reducing energy consumption. The SPI interface allows the HVAC controller to adjust fan speed and monitor system health. The wide input voltage range ensures operation during battery voltage fluctuations.

Recommended

STM32F4 (MCU for control) IRFB4110 (MOSFET for power stage)

🏭

Industrial BLDC Motor Control

Beyond automotive, the L9904TR can be used in industrial BLDC motor control applications such as pumps, fans, and compressors. Its robust protection features and wide operating voltage range make it suitable for 24V industrial systems. The integrated LDO simplifies power supply design, and the SPI interface enables integration with industrial control networks. The device's thermal performance allows operation in high-ambient-temperature environments.

Recommended

STM32F3 (MCU for control) IRFP4468 (MOSFET for power stage)

🚗

Electric Power Steering (EPS)

The L9904TR can be used in electric power steering systems, where precise and reliable motor control is critical. Its AEC-Q100 qualification and high-temperature operation ensure reliability in safety-critical applications. The SPI interface allows the EPS controller to monitor motor current and implement torque control algorithms. The integrated protection features prevent damage from overcurrent and overvoltage conditions.

Recommended

STM32F4 (MCU for control) IRF1405 (MOSFET for power stage)

Recommended Products Summary

STM32F103 MCU for motor control Used in: Engine Cooling Fan IRF3205 External power MOSFET Used in: Engine Cooling Fan STM32F030 MCU for control Used in: Electric Oil Pump IPD053N06N MOSFET for power stage Used in: Electric Oil Pump STM32G0 MCU for control Used in: Water Pump BUK9Y30-80B MOSFET for power stage Used in: Water Pump STM32F4 MCU for control Used in: HVAC Blower, Electric Power Steering (EPS) IRFB4110 MOSFET for power stage Used in: HVAC Blower STM32F3 MCU for control Used in: Industrial BLDC Motor Control IRFP4468 MOSFET for power stage Used in: Industrial BLDC Motor Control IRF1405 MOSFET for power stage Used in: Electric Power Steering (EPS)

What is the operating voltage range of L9904TR?

The L9904TR operates from 5.5V to 28V. According to the STMicroelectronics L9904 datasheet, this wide range accommodates automotive 12V systems with load dump transients and cold-crank conditions.

What is the price of L9904TR?

As of 2026-08-12, the L9904TR is priced at approximately $4.85 for single-unit quantities, $3.88 at 100 units, and $3.10 at 1000 units. Prices are indicative from distributor listings and may vary by region and volume.

Where can I buy L9904TR online?

The L9904TR is available from major distributors such as DigiKey, Mouser, and Arrow. You can also purchase directly from STMicroelectronics' authorized distributors. Check stock availability on their websites for current inventory.

What is the lead time for L9904TR?

Typical lead time for L9904TR is 8-12 weeks for standard orders, but it can vary based on distributor stock and order quantity. For urgent requirements, check current stock at DigiKey or Mouser, which may offer faster shipping.

Is L9904TR in stock?

Stock availability for L9904TR fluctuates. As of 2026-08-12, DigiKey and Mouser may have limited stock. Check their websites for real-time inventory and lead times.

What is the difference between L9904TR and L9904?

The L9904TR is the tape-and-reel packaging variant of the L9904. 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 L9904TR?

The best drop-in replacement for L9904TR is the L9904 (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 L9904TR?

The DRV8301 from Texas Instruments is a functional equivalent but not a drop-in replacement. It has a different package (HTSSOP-56) and pinout, so it requires PCB redesign. For a drop-in replacement, stick with the L9904 family.

Where can I download the L9904TR datasheet PDF?

The L9904TR datasheet PDF is available on the STMicroelectronics website at https://www.st.com/resource/en/datasheet/l9904.pdf. You can also find it on distributor sites like DigiKey and Mouser.

Where can I find the L9904TR pinout?

The L9904TR pinout is detailed in the datasheet on pages 3-5. It is a 48-pin LQFP package with exposed pad. The pinout diagram is available in the datasheet PDF from STMicroelectronics.

What are the key specifications of L9904TR that engineers should know?

The L9904TR operates from 5.5V to 28V, provides 1A source/2A sink gate drive, integrates a 5V/3.3V LDO with 100mA output, and features SPI interface. It is AEC-Q100 qualified and operates from -40C to +150C. These specs make it ideal for automotive BLDC motor control.

Is L9904TR suitable for automotive applications?

Yes, the L9904TR is AEC-Q100 qualified and designed for automotive environments. It operates from -40C to +150C and includes protection features like overcurrent and thermal shutdown, making it suitable for engine cooling fans, oil pumps, and water pumps.

What is the maximum gate drive current of L9904TR?

The L9904TR provides 1A source and 2A sink gate drive current. This allows fast switching of external MOSFETs, reducing switching losses in high-frequency PWM applications.

Does L9904TR have an integrated LDO?

Yes, the L9904TR integrates a 5V/3.3V LDO that can deliver up to 100mA. This LDO can power the MCU and logic circuits, simplifying the power supply design.

What is the package type of L9904TR?

The L9904TR comes in a 48-pin LQFP (EP) package with an exposed pad for thermal dissipation. The package dimensions are 7x7mm with a 0.5mm pitch.

What is the difference between L9904TR and DRV8301?

The L9904TR is from STMicroelectronics and comes in LQFP-48, while the DRV8301 from Texas Instruments is in HTSSOP-56. The L9904TR has an integrated LDO and SPI, while the DRV8301 has dual current-sense amplifiers. They are functionally similar but not pin-compatible.

When should I choose L9904TR over DRV8301?

Choose L9904TR when you need a compact LQFP-48 package, an integrated LDO for MCU power, and AEC-Q100 qualification. Choose DRV8301 if you require dual current-sense amplifiers and are willing to redesign the PCB for a larger package.

What is the best STMicroelectronics equivalent for L9904TR?

The best STMicroelectronics equivalent is the L9904 (non-tape-and-reel) which is identical except for packaging. For a different variant, the L9905 offers additional features but may have a different pinout.

Hey Google, what can replace L9904TR?

The L9904TR can be replaced by the L9904 from STMicroelectronics as a drop-in replacement. For cross-brand, the DRV8301 from Texas Instruments is a functional equivalent but requires PCB redesign due to different package and pinout.

Is L9904TR the same as L9904?

Yes, the L9904TR is the tape-and-reel packaging variant of the L9904. The 'TR' suffix indicates tape-and-reel packaging for automated assembly. The electrical specifications and package are identical.

Engineering reference data for L9904TR — comparison, design guidance, and compliance information.

Selection Guide

Choose the L9904TR when you need a compact, AEC-Q100 qualified BLDC motor driver with an integrated LDO and SPI interface for automotive applications. It is ideal for engine cooling fans, oil pumps, and water pumps. If you require a higher supply voltage range (up to 60V) and dual current-sense amplifiers, consider the DRV8301 from Texas Instruments, but be prepared to redesign the PCB due to the different package. For a drop-in replacement, use the L9904 (non-tape-and-reel) or the L9904TR-Q1 for automotive-grade variants. The L9904TR offers the best balance of size, temperature range, and integration for most automotive BLDC motor control applications.

Comparison with Alternatives

Parameter	This Product	L9904	L9904TR-Q1	DRV8301
Package	LQFP-48 (EP)	LQFP-48 (EP) - same	LQFP-48 (EP) - same	HTSSOP-56 - different
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	Texas Instruments
Supply Voltage Range	5.5V to 28V	5.5V to 28V	5.5V to 28V	6V to 60V
Gate Drive Current	1A source / 2A sink	1A source / 2A sink	1A source / 2A sink	1.7A source / 1.7A sink
Integrated LDO	Yes (5V/3.3V, 100mA)	Yes (5V/3.3V, 100mA)	Yes (5V/3.3V, 100mA)	Yes (3.3V/5V, 100mA)
Interface	SPI	SPI	SPI	SPI
AEC-Q100	Qualified	Qualified	Qualified	Qualified
Operating Temperature	-40C to +150C	-40C to +150C	-40C to +150C	-40C to +125C

Key Differentiators

Integrated LDO with 100mA output (vs DRV8301)
Wide operating temperature range up to 150C (vs DRV8301)
Compact LQFP-48 package (vs DRV8301)

Design Notes

For the L9904TR, ensure a solid ground plane and adequate copper area for the exposed pad to dissipate heat. Place the charge pump flying capacitors and bootstrap capacitors close to the IC pins to minimize parasitic inductance. Use low-ESR ceramic capacitors for VCC and LDO output decoupling.

The L9904TR's power dissipation depends on the gate charge of external MOSFETs and switching frequency. At 20kHz PWM with 100nC gate charge, the gate drive power is approximately 2W. Ensure the PCB has sufficient thermal vias under the exposed pad to keep the junction temperature below 150C.

Do not exceed the absolute maximum supply voltage of 28V. Ensure the SPI lines are properly terminated and isolated from high-current traces to avoid noise. The bootstrap capacitors must be sized correctly (typically 100nF) to maintain high-side gate drive voltage. Verify the LDO output capacitor is within the specified ESR range to prevent instability.