L9904-TR - Motor Bridge Controller for Automotive | STMicroelectronics
N.º de pieza: L9904-TR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.32 | $4,32 |
| 10 | $3.89 | $38,90 |
| 100 | $3.46 | $346,00 |
| 500 | $3.11 | $1.555,00 |
| 1.000 | $2.77 | $2.770,00 |
L9904-TR Descripción general
A motor bridge controller is a specialized power management IC that generates the gate drive signals and protection features needed to control external power MOSFETs in an H-bridge topology. It sits between a microcontroller and the power stage, translating low-voltage logic commands into high-current, high-voltage gate signals. This component category is part of the broader power management IC family, which includes gate drivers, motor drivers, and full H-bridge drivers. The L9904-TR specifically targets brushed DC motors in automotive body and chassis systems.
Key features of the L9904-TR include a programmable cross-conduction protection time, PWM operation up to 30 kHz, real-time diagnostic feedback, and a wide operating supply voltage range of 8V to 28V with an overvoltage tolerance up to 40V. The quiescent current in standby mode is less than 50 µA, making it suitable for always-on automotive modules. The charge pump enables efficient high-side N-channel MOSFET driving without external bootstrap components.
The L9904-TR uses a dedicated control architecture that includes a charge pump, a step-up converter for low-voltage operation, and an ISO 9141 serial interface for diagnostics. This allows the device to report fault conditions such as overcurrent, overtemperature, and short-circuit events to the ECU. The programmable cross-conduction protection time prevents shoot-through current in the H-bridge, enhancing system reliability.
Typical applications include automotive DC motor control for window lifts, sunroofs, seat adjusters, and cooling fans. The device is also suitable for industrial brushed DC motor control where a robust, automotive-grade controller is required. The ISO 9141 interface simplifies integration with existing vehicle diagnostic networks.
When designing with the L9904-TR, ensure adequate PCB copper area for thermal dissipation, especially when driving high-current motors. The charge pump requires a flying capacitor placed close to the CP pins, and the ISO 9141 bus line should be protected with appropriate ESD and load-dump protection components.
Alternativas directas para L9904-TR — 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 L9904-TR (mismo factor de forma y huella) — difiere en Charge Pump, Package, Supply Voltage Range.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
L9904
✅ Sustitución directa✓ En stock
$5.44 / unidad
Ver hoja de datos →L9333MD
⚡ Mismo encapsulado📋 Alternativa de referencia (no en el catálogo)
L9904-TR Valores máximos y características eléctricas
| Función | Motor Bridge Controller |
| Technology | Power MOSFET |
| Supply Voltage Range | 8 V to 28 V |
| Overvoltage Tolerance | 40 V (max) |
| Low Voltage Operation | 6 V (with step-up converter) |
| Quiescent Current (Standby) | < 50 µA |
| PWM Frequency | Up to 30 kHz |
| Cross-Conduction Protection | Programmable time |
| Diagnostic Interface | ISO 9141 |
| Charge Pump | Yes (for high-side drive) |
| Rango de temperatura de funcionamiento | -40°C to +150°C |
| Encapsulado | SO-20 |
| Estilo de montaje | SMD/SMT |
| Packaging | Tape & Reel (TR) |
| Estado RoHS | Compliant |
Configuración de pines de L9904-TR
| Pin 1 | CP1 — Charge pump flying capacitor connection |
| Pin 2 | CP2 — Charge pump flying capacitor connection |
| Pin 3 | VCC — Supply voltage |
| Pin 4 | GND — Ground |
| Pin 5 | IN1 — Logic input for H-bridge control |
| Pin 6 | IN2 — Logic input for H-bridge control |
| Pin 7 | IN3 — Logic input for H-bridge control |
| Pin 8 | IN4 — Logic input for H-bridge control |
| Pin 9 | ISO — ISO 9141 bus interface |
| Pin 10 | DIAG — Diagnostic output |
| Pin 11 | GND — Ground |
| Pin 12 | GND — Ground |
| Pin 13 | GH1 — High-side gate drive output 1 |
| Pin 14 | SH1 — High-side source sense 1 |
| Pin 15 | GL1 — Low-side gate drive output 1 |
| Pin 16 | GH2 — High-side gate drive output 2 |
| Pin 17 | SH2 — High-side source sense 2 |
| Pin 18 | GL2 — Low-side gate drive output 2 |
| Pin 19 | VCP — Charge pump output |
| Pin 20 | VCC — Supply voltage |
Aplicaciones típicas
L9904-TR es adecuado para 6 aplicacións: Automotive Window Lift, Sunroof Control, Seat Adjuster, Cooling Fan, Industrial Brushed DC Motor Control, Automotive Actuator.
Automotive Window Lift
The L9904-TR drives the H-bridge for DC window lift motors, providing precise speed and direction control. Its wide supply voltage range (8V-28V) handles load dump transients, while the ISO 9141 diagnostics report faults to the body control module. The charge pump enables efficient high-side N-MOSFET drive, and the low standby current (<50 µA) minimizes battery drain when the window is idle. PWM up to 30 kHz allows smooth, quiet operation. The -40°C to +150°C temperature range ensures reliable operation in extreme climates.
Recomendado
Sunroof Control
The L9904-TR provides robust motor control for sunroof systems, handling the high inrush currents of DC motors. The programmable cross-conduction protection prevents shoot-through, enhancing reliability. The ISO 9141 interface allows the sunroof ECU to monitor motor health and detect obstructions. The step-up converter ensures operation even when the battery voltage drops to 6V during cranking. The SO-20 package fits compact sunroof control modules, and the automotive temperature rating supports under-roof thermal stress.
Recomendado
Seat Adjuster
The L9904-TR controls the multiple DC motors in power seat adjusters, enabling precise positioning. Its real-time diagnostics detect stall conditions and prevent motor damage. The wide supply voltage range accommodates voltage fluctuations during simultaneous motor operation. The charge pump simplifies the high-side drive, reducing external components. The low quiescent current is ideal for always-on seat modules. The device's robust protection features ensure long-term reliability in daily use.
Recomendado
Cooling Fan
The L9904-TR drives the engine cooling fan motor, providing variable speed control via PWM up to 30 kHz. The high PWM frequency reduces acoustic noise and improves efficiency. The ISO 9141 diagnostics allow the engine control unit to monitor fan operation and detect faults. The wide supply voltage range handles load dump and cold-crank conditions. The device's thermal performance is suitable for under-hood environments, and the charge pump ensures reliable high-side drive.
Recomendado
Industrial Brushed DC Motor Control
The L9904-TR can be used in industrial brushed DC motor control applications such as conveyor belts, pumps, and actuators. Its wide supply voltage range (8V-28V) supports various industrial power rails. The programmable cross-conduction protection and real-time diagnostics enhance system reliability. The ISO 9141 interface can be adapted for industrial communication. The device's robust design and wide temperature range make it suitable for factory automation environments.
Recomendado
Automotive Actuator
The L9904-TR controls various automotive actuators such as throttle valves, wastegates, and HVAC flaps. Its precise PWM control and diagnostic feedback enable accurate positioning. The low standby current is critical for battery preservation. The step-up converter ensures operation during low battery conditions. The device's small SO-20 package fits space-constrained actuator modules, and the automotive temperature rating ensures reliability in engine bay environments.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para L9904-TR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | L9904 | L9333MD |
|---|---|---|---|
| Package | SO-20 | SO-20 | SO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
Diferenciadores clave
- ISO 9141 diagnostic interface (frente a L9333MD)
- Wide supply voltage range with step-up converter (frente a L9333MD)
- Low standby quiescent current (frente a L9333MD)
Notas de diseño
Place the charge pump flying capacitor (between CP1 and CP2) as close to the L9904-TR pins as possible, using a low-ESR ceramic capacitor (e.g., 10nF). Keep the high-side gate drive traces (GH1, GH2) short and wide to minimize parasitic inductance. Ensure a solid ground plane under the SO-20 package for thermal and electrical performance.
The L9904-TR's power dissipation depends on the gate charge of the external MOSFETs and the switching frequency. For high-frequency PWM (up to 30 kHz) with large MOSFETs, ensure adequate copper area on the PCB to dissipate heat. The SO-20 package has limited thermal capability; consider adding thermal vias under the package if the device is expected to dissipate more than 1W.
Do not exceed the absolute maximum supply voltage of 40V. Use a TVS diode or load-dump protection on the VCC pin for automotive applications. Ensure the ISO 9141 bus line is properly terminated and protected against ESD. The charge pump output (VCP) must not be loaded with more than the specified current; verify the flying capacitor value against the datasheet.
Información de cumplimiento
RoHS compliance is indicated by STMicroelectronics product pages. AEC-Q100 qualification is not explicitly stated in the provided data; the device is designed for automotive applications but may not be formally AEC-Q100 qualified.
