L9904TR - Automotive 3-Phase Brushless DC Motor Driver | STMicroelectronics
N.º de pieza: L9904TR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 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 |
L9904TR Descripción general
A brushless DC (BLDC) motor driver is a power management IC that controls the commutation of a BLDC motor by driving the gates of external power MOSFETs in a three-phase bridge configuration. It sits between the motor control MCU and the power stage, translating low-voltage logic signals into high-current gate drive signals. In the system hierarchy, the L9904TR is a motor driver IC within the broader category of power management ICs, specifically under motor drivers and gate drivers. It is a key component in automotive electronic control units (ECUs) that require precise, efficient, and reliable motor control.
Key features of the L9904TR include a wide operating voltage range from 5.5V to 28V, a charge pump that provides gate drive voltage for high-side N-channel MOSFETs, and a built-in 5V/3.3V LDO for powering the MCU and logic circuits. The device offers SPI (Serial Peripheral Interface) for configuration and diagnostics, and includes protection features such as overcurrent, overvoltage, undervoltage, and thermal shutdown. The LDO output can deliver up to 100mA, and the gate drive current is 1A source/2A sink, enabling fast switching of external MOSFETs.
The L9904TR uses a smart power technology that integrates analog, digital, and power functions on a single die. The charge pump architecture allows the use of N-channel MOSFETs for both high-side and low-side switches, reducing cost and improving efficiency compared to P-channel high-side solutions. The SPI interface enables real-time monitoring of fault conditions and flexible configuration of protection thresholds, making it a versatile solution for various motor control applications.
Typical applications include engine cooling fans, electric oil pumps, water pumps, HVAC blowers, and other automotive BLDC motor actuators. The device's wide input voltage range and robust protection make it suitable for harsh automotive environments, where voltage transients and thermal stress are common. The integrated LDO simplifies the power supply design by providing a regulated rail for the MCU, reducing external component count.
When designing with the L9904TR, it is essential to ensure proper PCB layout for the power stage, including adequate copper area for heat dissipation and low-inductance paths for the gate drive signals. The charge pump requires external flying capacitors, and the bootstrap capacitors for high-side gate drive must be placed close to the IC. The SPI interface should be isolated from high-current traces to avoid noise coupling. Proper decoupling of the VCC and LDO output pins is critical for stable operation.
Alternativas directas para L9904TR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con L9904TR (mismo factor de forma y huella) — difiere en Charge Pump, Gate Drive Current, Number of Channels, Operating Temperature, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
L9904
✅ Sustitución directa✓ En stock
$5.44 / unidad
Ver hoja de datos →L9904TR-Q1
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
L9904TR Valores máximos y características eléctricas
| Función | 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 |
| Interfaz | SPI |
| Protection Features | Overcurrent, overvoltage, undervoltage, thermal shutdown |
| Temperatura de funcionamiento | -40C to +150C |
| Encapsulado | LQFP-48 (EP) |
| Tipo de montaje | Surface Mount |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
| Number of Channels | 3-phase |
| Configuración de salida | External N-channel MOSFETs |
Configuración de pines de L9904TR
| 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 |
Aplicaciones típicas
L9904TR es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para L9904TR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Integrated LDO with 100mA output (frente a DRV8301)
- Wide operating temperature range up to 150C (frente a DRV8301)
- Compact LQFP-48 package (frente a DRV8301)
Notas de diseño
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.
Información de cumplimiento
AEC-Q100 qualified per STMicroelectronics product page. RoHS compliant. REACH compliance assumed based on ST's policy.
