L9975-TR - Automotive Quad Half-Bridge Driver | STMicroelectronics
料号： L9975-TR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $2.95 | $29.50 |
| 100 | $2.45 | $245.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
L9975-TR 概述
A half-bridge driver is a power management IC that contains two power switches (high-side and low-side) per output, allowing bidirectional current flow through a load connected between the output and ground or supply. This topology enables forward, reverse, and braking control of DC motors, as well as driving resistive, inductive, or capacitive loads. The L9975-TR belongs to the family of motor driver ICs, which are essential in automotive body electronics, HVAC actuators, and industrial automation.
Key features include a low quiescent current of 50 µA in standby mode, making it suitable for always-on automotive modules. Each output has built-in overcurrent protection, thermal shutdown, and a diagnostic output that reports fault conditions via a serial interface. The device also features a SPI-compatible control interface for configuring outputs and reading status, enabling precise motor control and system monitoring.
The L9975-TR uses a smart power technology that integrates CMOS control logic with DMOS power stages, providing efficient switching with low RDS(on) of 0.5 Ω per switch. This architecture minimizes power dissipation and supports PWM frequencies up to 20 kHz for quiet motor operation. The device includes a charge pump for high-side gate drive, allowing operation with a single supply without external bootstrap components.
Typical applications include automotive HVAC flap control, headlamp leveling, mirror adjustment, and industrial valve actuation. The wide supply range and robust protection make it ideal for 12 V and 24 V systems. In automotive environments, the AEC-Q100 qualification ensures reliability under extreme temperature and vibration.
When designing with the L9975-TR, ensure proper PCB layout with adequate copper area for the exposed pad to dissipate heat. The SPI interface requires careful timing and pull-up resistors on the data lines. For high-current loads, consider external freewheeling diodes to protect the outputs during inductive switching.
直接替换替代料： L9975-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： L9975-TR （相同外形与封装尺寸） ——差异在于 AEC-Q100 Qualification, Operating Temperature Range, Output Current per Channel, Package, Quiescent Current (Standby).
快速对比工具——选择替代料号进行并排对比：
L9975
✅ 直接替换✓ 有现货
$2.2 / 个
查看数据手册 →TLE9201SG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC33887
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
L9975-TR 最大额定值与电气特性
| Number of Half-Bridges | 4 |
| Supply Voltage Range | 5.5 V to 36 V |
| Output Current per Channel | 1.2 A (continuous) |
| RDS(on) per Switch | 0.5 Ω (typ) |
| Quiescent Current (Standby) | 50 µA (typ) |
| PWM Frequency | Up to 20 kHz |
| Control Interface | SPI |
| Diagnostic Output | Yes (SPI) |
| 过流保护 | Yes |
| 热关断 | Yes |
| 工作温度范围 | -40°C to +150°C (junction) |
| 封装 | SO-28 (exposed pad) |
| 安装类型 | Surface Mount |
| AEC-Q100 Qualification | Grade 1 |
| RoHS 状态 | Compliant |
| Charge Pump | Integrated |
L9975-TR 引脚配置
| 引脚 1 | OUT1 — Half-bridge 1 output |
| 引脚 2 | OUT2 — Half-bridge 2 output |
| 引脚 3 | OUT3 — Half-bridge 3 output |
| 引脚 4 | OUT4 — Half-bridge 4 output |
| 引脚 5 | VS — Supply voltage |
| 引脚 6 | GND — Ground |
| 引脚 7 | SPI_CS — SPI chip select |
| 引脚 8 | SPI_CLK — SPI clock |
| 引脚 9 | SPI_SDI — SPI data input |
| 引脚 10 | SPI_SDO — SPI data output |
| 引脚 11 | DIAG — Diagnostic output |
| 引脚 12 | EN — Enable input |
典型应用
L9975-TR 适用于 6 应用s: Automotive HVAC Flap Control, Headlamp Leveling System, Mirror Adjustment, Industrial Valve Actuation, Automotive Seat Adjustment, Robotics and Automation.
Automotive HVAC Flap Control
The L9975-TR drives DC motors for HVAC flap positioning in automotive climate control systems. Its four half-bridges can control multiple flaps independently, with SPI diagnostics for fault detection. The wide supply range (5.5V-36V) accommodates both 12V and 24V vehicle systems, and the AEC-Q100 Grade 1 qualification ensures reliable operation under extreme temperatures. The low standby current (50µA) is critical for always-on modules to minimize battery drain. PWM capability up to 20kHz allows precise flap positioning and quiet operation. The integrated protection features (overcurrent, thermal shutdown) safeguard the motor and IC during stall conditions. In a typical system, the L9975-TR is connected to the body control module via SPI, and each half-bridge drives a flap motor with external freewheeling diodes for inductive load protection. The diagnostic output provides real-time status, enabling predictive maintenance and fault logging.
推荐
Headlamp Leveling System
The L9975-TR is used in automatic headlamp leveling systems to adjust the vertical angle of headlights based on vehicle load. The four half-bridges can drive stepper motors or DC motors for precise leveling. The SPI interface allows the ECU to command position changes and read feedback from sensors. The wide supply range and automotive qualification make it suitable for under-hood environments. The low RDS(on) (0.5Ω) minimizes power loss, and the integrated charge pump ensures high-side drive without external components. In a typical application, the L9975-TR receives commands from a leveling ECU, and each half-bridge drives a motor with PWM for smooth adjustment. The diagnostic output can detect motor faults, such as open or short circuits, and report them to the ECU for driver notification. The thermal shutdown protects the IC during prolonged operation in high ambient temperatures.
推荐
Mirror Adjustment
The L9975-TR drives the DC motors used for electric mirror adjustment in vehicles. Each half-bridge can control one axis of a mirror, allowing independent adjustment of horizontal and vertical tilt. The SPI interface enables precise control and status monitoring. The low quiescent current is beneficial for reducing battery drain when the vehicle is off. The device's protection features prevent damage from motor stalls or short circuits. In a typical application, the L9975-TR is controlled by a body control module, and each half-bridge drives a mirror motor with PWM for smooth movement. The diagnostic output can detect if a mirror is obstructed, allowing the system to stop and report an error. The wide supply range ensures compatibility with both 12V and 24V electrical systems.
推荐
Industrial Valve Actuation
The L9975-TR is used in industrial automation to control solenoid valves and small DC motors. Its four half-bridges can drive multiple valves, and the SPI interface allows remote control and monitoring. The wide supply range (5.5V-36V) supports various industrial power rails. The device's robust protection features (overcurrent, thermal shutdown) ensure reliable operation in harsh environments. The low RDS(on) reduces power dissipation, and the PWM capability enables proportional control of valve position. In a typical application, the L9975-TR is connected to a PLC or industrial controller via SPI, and each half-bridge drives a valve actuator with PWM for precise flow control. The diagnostic output provides real-time status, enabling predictive maintenance. The AEC-Q100 qualification, while automotive-focused, also indicates high reliability suitable for industrial use.
推荐
Automotive Seat Adjustment
The L9975-TR can be used to drive the DC motors for seat position adjustment in vehicles. Each half-bridge can control one motor, allowing independent adjustment of seat position, recline, and lumbar support. The SPI interface enables precise control and memory functions. The wide supply range and automotive qualification make it suitable for this application. The low quiescent current is beneficial for reducing battery drain when the vehicle is off. The device's protection features prevent damage from motor stalls or short circuits. In a typical application, the L9975-TR is controlled by a seat control module, and each half-bridge drives a motor with PWM for smooth movement. The diagnostic output can detect if a seat is obstructed, allowing the system to stop and report an error.
推荐
Robotics and Automation
The L9975-TR is used in robotics and automation for driving small DC motors and actuators. Its four half-bridges can control multiple motors, and the SPI interface allows integration with microcontrollers. The wide supply range supports various battery voltages. The device's protection features ensure reliable operation in dynamic environments. The low RDS(on) and PWM capability enable efficient and precise motor control. In a typical application, the L9975-TR is connected to a microcontroller via SPI, and each half-bridge drives a motor with PWM for speed and direction control. The diagnostic output provides real-time status, enabling fault detection and recovery. The compact SO-28 package is suitable for space-constrained designs.
推荐
推荐产品汇总
工程参考数据： L9975-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 | L9975 | TLE9201SG | MC33887 |
|---|---|---|---|---|
| Package | SO-28 | SO-28 | SO-28 | SO-28 |
| Brand | STMicroelectronics | STMicroelectronics | Infineon | NXP Semiconductors |
| Number of Half-Bridges | 4 | 4 | 4 | 4 |
| Supply Voltage Range | 5.5 V to 36 V | 5.5 V to 36 V | 5.5 V to 28 V | 5.0 V to 28 V |
| Output Current per Channel | 1.2 A | 1.2 A | 1.0 A | 1.0 A |
| RDS(on) per Switch | 0.5 Ω | 0.5 Ω | 0.6 Ω | 0.55 Ω |
| Control Interface | SPI | SPI | SPI | Parallel |
| AEC-Q100 Qualification | Grade 1 | Grade 1 | Grade 0 | Grade 1 |
关键差异点
- Higher output current per channel (1.2 A) compared to cross-brand alternatives （对比 TLE9201SG)
- Wider supply voltage range (5.5V-36V) vs TLE9201SG (5.5V-28V) （对比 TLE9201SG)
- SPI interface with diagnostics vs MC33887 parallel interface （对比 MC33887)
设计说明
The L9975-TR in SO-28 package with exposed pad requires proper thermal management. Ensure the exposed pad is soldered to a large copper area on the PCB to dissipate heat. For continuous operation at 1.2 A per channel, calculate power dissipation using P = I^2 * RDS(on) * number of channels. At 1.2 A and 0.5 Ω, each channel dissipates 0.72 W, so four channels could dissipate 2.88 W. Use thermal vias to connect the pad to inner layers for improved heat spreading.
Place decoupling capacitors close to the VS pin to filter supply noise. Use a 100 nF ceramic capacitor and a 10 µF electrolytic capacitor. For the SPI lines, add series resistors (e.g., 22 Ω) to reduce ringing and improve signal integrity. Keep SPI traces short and avoid routing near high-current outputs to prevent coupling.
Do not exceed the absolute maximum supply voltage of 40 V. Ensure the SPI interface is properly initialized before enabling outputs. When driving inductive loads, add freewheeling diodes across each output to prevent voltage spikes. The diagnostic output is open-drain; use a pull-up resistor to VCC. Verify the SPI protocol timing matches the datasheet to avoid communication errors.
合规信息
AEC-Q100 Grade 1 qualified per STMicroelectronics. RoHS compliant. REACH compliance assumed based on ST policy.
