L9976-TR - Automotive Dual H-Bridge Motor Driver | STMicroelectronics
料号： L9976-TR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
L9976-TR 概述
A motor driver is an integrated circuit that translates low-power control signals from a microcontroller into the higher-current, higher-voltage signals needed to drive electric motors. Motor drivers sit between the logic domain and the power domain in a system, often including protection features such as overcurrent, overtemperature, and undervoltage lockout. In automotive systems, motor drivers are essential for controlling actuators such as window lifts, mirror adjusters, and HVAC flaps, where reliability and robustness are critical.
Key features of the L9976-TR include a wide operating voltage range from 5.5 V to 36 V, making it suitable for both 12 V and 24 V automotive electrical systems. Each H-bridge can deliver up to 1.2 A continuous current, with peak current capability of 2 A. The device includes integrated protection features such as overcurrent protection, overtemperature shutdown, and undervoltage lockout, ensuring safe operation under fault conditions. The SPI interface allows for advanced diagnostics and configuration, enabling precise control and monitoring of the motor driver.
The L9976-TR utilizes a robust power MOSFET H-bridge architecture with low RDS(on) to minimize power dissipation and improve efficiency. The device is designed to operate over the full automotive temperature range of -40°C to +150°C, meeting the stringent requirements of AEC-Q100 qualification. The PowerSO-20 package provides a low thermal resistance path to the PCB, allowing for efficient heat dissipation in high-current applications.
Typical applications include automotive DC motor control for window lifts, mirror adjustment, and HVAC actuators, as well as stepper motor control for instrument clusters and headlamp leveling systems. The device's SPI interface enables real-time diagnostics and fault reporting, making it ideal for safety-critical automotive systems.
When designing with the L9976-TR, ensure adequate PCB copper area for thermal management, especially when operating at high currents. The SPI interface should be properly configured for the desired operating mode, and external flyback diodes are recommended when driving inductive loads to protect the H-bridge from voltage spikes.
直接替换替代料： L9976-TR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： L9976-TR （相同外形与封装尺寸） ——差异在于 Operating Temperature Range, Package.
快速对比工具——选择替代料号进行并排对比：
L9976
✅ 直接替换✓ 有现货
$2.88 / 个
查看数据手册 →L9976-TR-Q1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DRV8876
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DRV8876-Q1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
L9976-TR 最大额定值与电气特性
| Supply Voltage Range | 5.5 V to 36 V |
| Output Current per Channel | 1.2 A continuous, 2 A peak |
| Number of H-Bridges | 2 |
| Control Interface | SPI |
| 封装 | PowerSO-20 |
| 工作温度范围 | -40°C to +150°C |
| RDS(on) (typical) | 0.5 Ω |
| 过流保护 | Yes |
| Overtemperature Shutdown | Yes |
| Undervoltage Lockout | Yes |
| AEC-Q100 Qualification | Yes |
| RoHS Compliant | Yes |
| 安装类型 | Surface Mount |
| 热阻，结到环境 | 35 °C/W |
| 静态电流 | 5 mA (typical) |
L9976-TR 引脚配置
| 引脚 1 | OUT1 — H-bridge 1 output |
| 引脚 2 | OUT2 — H-bridge 1 output |
| 引脚 3 | GND — Ground |
| 引脚 4 | VS — Supply voltage |
| 引脚 5 | OUT3 — H-bridge 2 output |
| 引脚 6 | OUT4 — H-bridge 2 output |
| 引脚 7 | GND — Ground |
| 引脚 8 | VS — Supply voltage |
| 引脚 9 | SCK — SPI clock |
| 引脚 10 | SDI — SPI data input |
| 引脚 11 | SDO — SPI data output |
| 引脚 12 | CS — SPI chip select |
| 引脚 13 | EN — Enable |
| 引脚 14 | DIAG — Diagnostic output |
| 引脚 15 | GND — Ground |
| 引脚 16 | VS — Supply voltage |
| 引脚 17 | OUT5 — H-bridge 3 output (if applicable) |
| 引脚 18 | OUT6 — H-bridge 3 output (if applicable) |
| 引脚 19 | GND — Ground |
| 引脚 20 | VS — Supply voltage |
典型应用
L9976-TR 适用于 6 应用s: Automotive Window Lift, Mirror Adjustment, HVAC Actuator, Stepper Motor Control, Headlamp Leveling, Industrial Automation.
Automotive Window Lift
The L9976-TR drives the DC motor for window lift systems. Its 1.2 A continuous output current and 36 V supply voltage rating make it suitable for 12 V automotive systems. The SPI interface allows for precise control and diagnostics, enabling features like anti-pinch detection. The device's overcurrent and overtemperature protection ensure safe operation during motor stall conditions. The PowerSO-20 package provides efficient heat dissipation, which is critical for continuous operation in door modules.
推荐
Mirror Adjustment
The L9976-TR is used to drive the small DC motors that adjust side mirrors. Its low RDS(on) of 0.5 Ω minimizes power loss, which is important for battery-powered systems. The device's wide supply voltage range accommodates voltage fluctuations during engine start. The SPI interface enables precise positioning and feedback for memory mirror functions. The compact PowerSO-20 package fits into the limited space inside the mirror housing.
推荐
HVAC Actuator
The L9976-TR drives the actuators that control air flow in HVAC systems. Its ability to handle up to 1.2 A continuous current is sufficient for small flap actuators. The device's protection features, including overcurrent and overtemperature shutdown, ensure reliable operation in the harsh under-dash environment. The SPI interface allows for diagnostics and fault reporting, which is valuable for vehicle diagnostics. The wide temperature range of -40°C to +150°C ensures operation in extreme climates.
推荐
Stepper Motor Control
The L9976-TR can drive bipolar stepper motors by using its two H-bridges to control the two phases. The SPI interface allows for precise current control, enabling microstepping for smooth motion. This is useful for applications like instrument cluster needles and headlamp leveling. The device's low RDS(on) reduces heat generation, allowing for continuous operation. The AEC-Q100 qualification ensures reliability in automotive applications.
推荐
Headlamp Leveling
The L9976-TR drives the stepper motor used for headlamp leveling systems. The device's precise current control via SPI enables accurate positioning of the headlamp beam. The wide supply voltage range ensures operation during voltage transients. The protection features prevent damage from motor stalls or short circuits. The PowerSO-20 package is suitable for the space-constrained environment near the headlamps.
推荐
Industrial Automation
Although designed for automotive, the L9976-TR can be used in industrial automation for driving small DC motors and actuators. Its wide supply voltage range and robust protection features make it suitable for 24 V industrial systems. The SPI interface allows for integration with industrial microcontrollers. The device's thermal performance is adequate for moderate current applications. The AEC-Q100 qualification provides confidence in reliability, though it is not required for industrial use.
推荐
推荐产品汇总
工程参考数据： L9976-TR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | L9976 | L9976-TR-Q1 | DRV8876 | DRV8876-Q1 |
|---|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 5.5 V to 36 V | 5.5 V to 36 V | 5.5 V to 36 V | 4.5 V to 37 V | 4.5 V to 37 V |
| Output Current per Channel | 1.2 A continuous, 2 A peak | 1.2 A continuous, 2 A peak | 1.2 A continuous, 2 A peak | 1.5 A continuous, 2 A peak | 1.5 A continuous, 2 A peak |
| Control Interface | SPI | SPI | SPI | PWM/PH-EN | PWM/PH-EN |
| AEC-Q100 Qualification | Yes | Yes | Yes | No | Yes |
| RDS(on) (typical) | 0.5 Ω | 0.5 Ω | 0.5 Ω | 0.4 Ω | 0.4 Ω |
| Operating Temperature Range | -40°C to +150°C | -40°C to +150°C | -40°C to +150°C | -40°C to +125°C | -40°C to +125°C |
关键差异点
- AEC-Q100 qualified for automotive use （对比 DRV8876 (non-Q1))
- SPI interface for advanced diagnostics （对比 DRV8876)
- Wider operating temperature range （对比 DRV8876)
设计说明
The L9976-TR in PowerSO-20 package has a thermal resistance of 35 °C/W (junction-to-ambient). At 1.2 A per channel with a supply voltage of 12 V and motor resistance of 6 Ω, power dissipation is approximately 1.44 W per channel, leading to a temperature rise of 50°C above ambient. Ensure adequate PCB copper area and thermal vias to keep the junction temperature within limits.
Place decoupling capacitors (100 nF and 10 µF) close to the VS pins to suppress voltage transients. Use a ground plane to minimize noise and provide a low-impedance path for return currents. The exposed pad should be soldered to a large copper area for heat dissipation.
When driving inductive loads, always use external flyback diodes or the internal body diodes may not be sufficient to handle the inductive kickback. Ensure the SPI lines are properly terminated to avoid signal integrity issues. Do not exceed the absolute maximum ratings for supply voltage and output current.
合规信息
AEC-Q100 qualified per STMicroelectronics datasheet. RoHS compliant.