L9904TR - Automotive 3-Phase Brushless DC Motor Driver | STMicroelectronics
MPN: L9904TR ✓ NakahandaL9904TR Ulas
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.
Mga alternatibo na pwedeng ilagay na L9904TR — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok L9904TR (parehas na form factor at footprint) — pagkakaiba sa Charge Pump, Gate Drive Current, Number of Channels, Operating Temperature, Package.
L9904
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →L9904TR-Q1
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
L9904TR Mga Pinakamataas na Rating at Electrical Characteristics
| Fungsi | 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 |
| Temperature na Operasyon | -40C to +150C |
| Packhaging | LQFP-48 (EP) |
| Uri ng Pagpapasok | Surface Mount |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
| Number of Channels | 3-phase |
| Output Kumpigurasyon | External N-channel MOSFETs |
Pin Configuration ng 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 |
Tipikal na mga Gamit
L9904TR ay nararapat para sa 6 aplikasyons: 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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for L9904TR — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang 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 |
Pangunahing mga Pagkakaiba
- Integrated LDO with 100mA output (kumpara saDRV8301)
- Wide operating temperature range up to 150C (kumpara saDRV8301)
- Compact LQFP-48 package (kumpara saDRV8301)
Talaan ng Disenyo
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.
Impormasyon ng Pagsunod sa Kautusan
AEC-Q100 qualified per STMicroelectronics product page. RoHS compliant. REACH compliance assumed based on ST's policy.
