L9779WDM-TR - Automotive Quad Low-Side Driver | STMicroelectronics
N.º de pieza: L9779WDM-TR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.56 | $25,60 |
| 100 | $2.28 | $228,00 |
| 500 | $2.05 | $1.025,00 |
| 1.000 | $1.85 | $1.850,00 |
L9779WDM-TR Descripción general
A low-side driver is a type of power switch that connects the load to ground when activated, commonly used in automotive body control modules, relay drivers, and solenoid actuators. It is a fundamental building block in power management and load control systems, sitting between the microcontroller and the load, translating low-voltage logic signals into high-current switching actions. The L9779WDM-TR integrates protection features such as overcurrent, overtemperature, and short-circuit protection, ensuring robust operation in demanding conditions.
Key features include a wide operating voltage range, low quiescent current, and built-in diagnostics via a serial peripheral interface (SPI) for fault reporting. The device supports PWM control up to 20 kHz, making it suitable for dimming and motor speed control. Its thermal shutdown and current limiting capabilities protect the IC and the load from damage, while the SPI interface allows for real-time monitoring and configuration.
The L9779WDM-TR utilizes a robust BCD (Bipolar-CMOS-DMOS) process technology, enabling high-voltage operation with low on-resistance. The output stages are designed to handle inductive loads with built-in freewheeling diodes, reducing the need for external clamping components. The device also features a standby mode with very low current consumption, ideal for battery-powered automotive systems.
Typical applications include automotive body control modules, relay and solenoid drivers, LED lighting control, and industrial PLC output stages. Its ability to drive multiple loads with individual control makes it a versatile choice for distributed control systems. The SPI interface simplifies integration with microcontrollers, reducing PCB complexity and component count.
When designing with the L9779WDM-TR, ensure proper thermal management by providing adequate copper area on the PCB for heat dissipation. The device's thermal shutdown protection prevents damage, but sustained operation at high currents may require heatsinking. Additionally, place a decoupling capacitor close to the VCC pin to minimize voltage transients.
Alternativas directas para L9779WDM-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 L9779WDM-TR (mismo factor de forma y huella) — difiere en Package, Communication Interface, Operating Temperature Range, Mounting Type, Operating Temperature.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
L9779WD
✅ Sustitución directa✓ En stock
$5.85 / unidad
Ver hoja de datos →L9779WD-TR
✅ Sustitución directa✓ En stock
$9.4 / unidad
Ver hoja de datos →TLE6228GP
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MC33289
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
L9779WDM-TR Valores máximos y características eléctricas
| Number of Channels | 4 |
| Tipo de salida | Low-Side Open-Drain |
| Supply Voltage Range | 4.5 V to 40 V |
| Maximum Output Current per Channel | 1 A |
| On-Resistance (Typical) | 0.5 ohm |
| Corriente en reposo | 10 uA (standby) |
| PWM Frequency | Up to 20 kHz |
| Interfaz | SPI |
| Protection Features | Overcurrent, Overtemperature, Short-Circuit |
| Rango de temperatura de funcionamiento | -40C to +150C |
| Encapsulado | SOIC-20 (SO-20) |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 3 (168 hours) |
| Estado RoHS | Compliant |
| AEC-Q100 | Qualified |
Configuración de pines de L9779WDM-TR
| Pin 1 | OUT1 — Low-side output channel 1 |
| Pin 2 | OUT2 — Low-side output channel 2 |
| Pin 3 | OUT3 — Low-side output channel 3 |
| Pin 4 | OUT4 — Low-side output channel 4 |
| Pin 5 | GND — Ground |
| Pin 6 | VCC — Supply voltage |
| Pin 7 | SCK — SPI clock input |
| Pin 8 | SDI — SPI data input |
| Pin 9 | SDO — SPI data output |
| Pin 10 | CS — SPI chip select |
| Pin 11 | RST — Reset input |
| Pin 12 | IN1 — Control input for channel 1 |
| Pin 13 | IN2 — Control input for channel 2 |
| Pin 14 | IN3 — Control input for channel 3 |
| Pin 15 | IN4 — Control input for channel 4 |
| Pin 16 | NC — No connect |
| Pin 17 | NC — No connect |
| Pin 18 | NC — No connect |
| Pin 19 | NC — No connect |
| Pin 20 | NC — No connect |
Aplicaciones típicas
L9779WDM-TR es adecuado para 6 aplicacións: Automotive Body Control Module, Relay and Solenoid Driver, LED Lighting Control, Industrial PLC Output Stage, Automotive Transmission Control, Smart Power Distribution.
Automotive Body Control Module
The L9779WDM-TR is ideal for automotive body control modules (BCMs) where multiple loads such as relays, solenoids, and LEDs must be controlled independently. Its quad-channel architecture reduces component count and PCB area, while the SPI interface enables efficient communication with the central microcontroller. The wide supply voltage range (4.5V to 40V) accommodates both 12V and 24V vehicle systems, and the AEC-Q100 qualification ensures reliability in harsh automotive environments. The built-in protection features (overcurrent, overtemperature, short-circuit) safeguard the BCM and connected loads, reducing the risk of field failures. The low standby current (10 uA) is crucial for minimizing battery drain when the vehicle is off, extending battery life. The device's ability to handle inductive loads with internal freewheeling diodes simplifies the design of relay and solenoid drivers, eliminating the need for external clamping components. Overall, the L9779WDM-TR provides a robust, space-efficient solution for BCM load control, enhancing system reliability and reducing design complexity.
Recomendado
Relay and Solenoid Driver
The L9779WDM-TR excels as a relay and solenoid driver in industrial and automotive systems. Each of its four channels can sink up to 1A, sufficient for most small relays and solenoids. The built-in freewheeling diodes handle inductive kickback, protecting the IC and reducing external component count. The PWM capability up to 20 kHz allows for proportional control of solenoids, enabling precise actuation in applications like transmission control or hydraulic valves. The SPI interface provides diagnostic feedback, allowing the system to detect open-load or short-circuit conditions in real time. The wide operating temperature range (-40C to +150C) ensures reliable operation in extreme environments, such as engine compartments or industrial machinery. The low on-resistance (0.5 ohm) minimizes power dissipation, improving energy efficiency and reducing heat generation. This makes the L9779WDM-TR a versatile and reliable choice for driving inductive loads in demanding applications.
Recomendado
LED Lighting Control
The L9779WDM-TR is well-suited for LED lighting control in automotive and industrial applications. Its four channels can independently drive LED strings, with PWM control up to 20 kHz enabling smooth dimming without visible flicker. The wide supply voltage range supports various LED configurations, and the low on-resistance ensures minimal voltage drop, maximizing LED efficiency. The SPI interface allows for individual channel control and diagnostics, enabling features like fault detection and current monitoring. The device's thermal protection prevents overheating when driving high-power LEDs, ensuring long-term reliability. In automotive applications, the AEC-Q100 qualification guarantees performance under extreme temperature and vibration conditions. The compact SOIC-20 package saves PCB space, making it ideal for space-constrained lighting modules. Overall, the L9779WDM-TR provides a flexible and robust solution for LED lighting control, from interior ambient lighting to exterior signal lamps.
Recomendado
Industrial PLC Output Stage
The L9779WDM-TR is an excellent choice for industrial programmable logic controller (PLC) output stages, where multiple loads such as relays, solenoids, and indicator lamps must be switched reliably. Its quad-channel design allows for compact output modules, reducing PCB size and cost. The wide supply voltage range (4.5V to 40V) accommodates various industrial power rails, and the SPI interface enables easy integration with PLC processors for configuration and diagnostics. The built-in protection features (overcurrent, overtemperature, short-circuit) ensure safe operation in industrial environments where faults are common. The device's ability to handle inductive loads with internal freewheeling diodes simplifies the design of output stages for motors and valves. The operating temperature range of -40C to +150C ensures reliable operation in factory floors with high ambient temperatures. The low quiescent current in standby mode reduces power consumption when outputs are idle, contributing to energy-efficient PLC systems.
Recomendado
Automotive Transmission Control
The L9779WDM-TR is suitable for automotive transmission control units (TCUs) where precise solenoid actuation is critical. Its four channels can drive multiple solenoids for gear shifting and pressure control, with PWM capability enabling proportional control for smooth shifting. The SPI interface provides real-time diagnostics, allowing the TCU to monitor solenoid health and detect faults. The wide supply voltage range (4.5V to 40V) supports both 12V and 24V systems, and the AEC-Q100 qualification ensures reliability in the harsh under-hood environment. The built-in freewheeling diodes handle the inductive kickback from solenoids, reducing external component count and simplifying PCB layout. The low on-resistance minimizes power dissipation, improving thermal performance in the confined space of a transmission housing. The device's robust protection features prevent damage from short circuits and overcurrent conditions, enhancing the overall reliability of the transmission control system.
Recomendado
Smart Power Distribution
The L9779WDM-TR can be used in smart power distribution systems to replace traditional fuses and relays with semiconductor switches. Its quad-channel design allows for centralized control of multiple loads, with SPI communication enabling remote monitoring and control. The built-in protection features (overcurrent, overtemperature, short-circuit) provide intelligent fault handling, reducing the need for external protection components. The wide supply voltage range and low on-resistance make it suitable for high-current applications, while the PWM capability enables soft-start and dimming functions. In automotive applications, the AEC-Q100 qualification ensures reliable operation in harsh conditions, and the low standby current helps preserve battery life. The compact SOIC-20 package enables high-density power distribution modules, saving space in modern vehicles. This approach enhances system reliability, reduces wiring complexity, and enables advanced features like load diagnostics and predictive maintenance.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para L9779WDM-TR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | L9779WD | TLE6228GP | MC33289 |
|---|---|---|---|---|
| Package | SOIC-20 | SOIC-20 | SOIC-20 | SOIC-20 |
| Brand | STMicroelectronics | STMicroelectronics | Infineon | NXP Semiconductors |
| Number of Channels | 4 | 4 | 4 | 4 |
| Supply Voltage Range | 4.5V to 40V | 4.5V to 40V | 4.5V to 40V | 4.5V to 40V |
| Maximum Output Current per Channel | 1A | 1A | 1A | 1A |
| Interface | SPI | SPI | SPI | SPI |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified |
Diferenciadores clave
- AEC-Q100 qualified for automotive use (frente a TLE6228GP)
- Low on-resistance of 0.5 ohm (frente a MC33289)
- Integrated freewheeling diodes (frente a TLE6228GP)
Notas de diseño
The L9779WDM-TR can dissipate significant power when driving multiple channels at high current. For example, with all four channels at 1A and a supply voltage of 12V, the total power dissipation can reach 2W (assuming 0.5 ohm on-resistance). The SOIC-20 package has a thermal resistance of approximately 80 C/W (theta_JA), resulting in a junction temperature rise of 160C above ambient. Ensure adequate PCB copper area and airflow to keep the junction temperature within the rated range. For continuous operation at high currents, consider adding thermal vias and a larger copper pour on the PCB.
Place a 100nF ceramic decoupling capacitor as close as possible to the VCC pin (pin 6) and a 10uF electrolytic capacitor nearby to handle transient currents. For each output, add a flyback diode if the load is inductive, although the device has internal freewheeling diodes, external diodes may be needed for high-energy loads. Ensure the ground plane is solid and connected to the GND pin (pin 5) with minimal impedance to reduce noise and voltage drops.
Do not exceed the absolute maximum supply voltage of 40V. Ensure the SPI lines are properly terminated and have pull-up resistors if needed. When using PWM, avoid frequencies above 20 kHz to prevent excessive switching losses. Also, be aware that the device's thermal shutdown may activate if the junction temperature exceeds the limit; provide adequate cooling or reduce the output current to prevent unexpected shutdowns.
Información de cumplimiento
RoHS compliant and AEC-Q100 qualified per STMicroelectronics product page. Halogen-free status not explicitly stated in the provided data.
