L9958 - Low RDSON SPI Controlled H-Bridge | STMicroelectronics
料号： L9958 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.04 | $9.04 |
| 10 | $8.5 | $85.00 |
| 100 | $7.5 | $750.00 |
| 500 | $6.8 | $3,400.00 |
| 1,000 | $6.2 | $6,200.00 |
L9958 概述
An H-Bridge is a fundamental electronic circuit that allows a voltage to be applied across a load in either direction, enabling bidirectional control of DC motors and precise stepping of stepper motors. The L9958 is a specific implementation of this topology, adding an SPI interface for digital control and diagnostics, making it suitable for automotive and industrial applications where reliable, fault-tolerant motor control is required. As a motor driver, it sits within the broader category of power management ICs, specifically within motor drivers and controllers.
Key features of the L9958 include its SPI-controlled interface, which allows for flexible configuration and real-time monitoring of the motor state. The low RDSON of the output stage minimizes power losses, improving overall system efficiency. The device is designed to operate under extreme environmental conditions, making it suitable for automotive under-the-hood applications. It also includes protection features such as overcurrent and overtemperature shutdown, ensuring safe operation in fault conditions.
The L9958 is built using a robust CMOS process, which provides high noise immunity and low quiescent current. The SPI interface supports daisy-chaining of multiple devices, simplifying system design in multi-motor applications. The device operates over a wide supply voltage range, accommodating various automotive and industrial power rails. The PowerSO-20 package with exposed pad ensures efficient heat transfer to the PCB, allowing the device to handle continuous currents without exceeding thermal limits.
Typical applications for the L9958 include automotive DC motor control for window lifts, seat adjustment, and mirror positioning, as well as industrial automation for conveyor belts and robotic actuators. Its SPI interface and diagnostic capabilities make it ideal for safety-critical systems where monitoring and fault detection are essential. The device's ability to drive both DC and stepper motors adds versatility, reducing the need for multiple driver ICs in a design.
When designing with the L9958, it is important to ensure proper PCB layout for thermal management, particularly when driving high currents. The exposed pad should be connected to a large copper area to dissipate heat effectively. Additionally, the SPI interface should be properly terminated and decoupled to ensure reliable communication in noisy environments.
直接替换替代料： L9958 ——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： L9958 （相同外形与封装尺寸） ——差异在于 Protection Features, Package, Output Type, Number of Channels, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
L9950-TR
⚡ 相同封装 ⚠️ 规格未核验✓ 有现货
$2.1 / 个
查看数据手册 →VNH5019A
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
BTN8982TA
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
L9958 最大额定值与电气特性
| 功能 | SPI Controlled H-Bridge |
| Motor Type | DC Motor, Stepper Motor |
| 接口 | SPI |
| 封装 | PowerSO-20 (20-SOIC, 0.433", 11.00mm Width) Exposed Pad |
| 安装类型 | Surface Mount |
| 输出数量 | 1 H-Bridge |
| Protection Features | Overcurrent, Overtemperature |
| RoHS 状态 | Compliant |
| Diagnostics | SPI-based |
L9958 引脚配置
| 引脚 1 | OUT1 — H-Bridge output 1 |
| 引脚 2 | OUT2 — H-Bridge output 2 |
| 引脚 3 | GND — Ground |
| 引脚 4 | VS — Supply voltage |
| 引脚 5 | SCK — SPI clock |
| 引脚 6 | SDI — SPI data input |
| 引脚 7 | SDO — SPI data output |
| 引脚 8 | CS — SPI chip select |
| 引脚 9 | GND — Ground |
| 引脚 10 | OUT3 — H-Bridge output 3 |
| 引脚 11 | OUT4 — H-Bridge output 4 |
| 引脚 12 | GND — Ground |
典型应用
L9958 适用于 6 应用s: Automotive DC Motor Control, Industrial Automation, Robotics, Medical Equipment, Aerospace and Defense, Consumer Electronics.
Automotive DC Motor Control
The L9958 is ideal for automotive DC motor control applications such as window lifts, seat adjustment, and mirror positioning. Its SPI interface allows for precise control and diagnostics, while the low RDSON ensures efficient operation. The device is designed to withstand extreme environmental conditions, making it suitable for under-the-hood use. In a typical window lift system, the L9958 drives the motor bidirectionally, with the SPI interface providing real-time feedback on motor status and fault conditions. The low RDSON minimizes power dissipation, reducing heat buildup in the confined space of a car door. The device's overcurrent and overtemperature protection ensure safe operation even in stall conditions. Compared to discrete H-Bridge designs, the L9958 simplifies the circuit and reduces component count, improving reliability and reducing assembly cost.
推荐
Industrial Automation
In industrial automation, the L9958 can be used to control conveyor belts, robotic actuators, and other motor-driven equipment. Its SPI interface enables easy integration with industrial control systems, allowing for precise speed and position control. The device's robust design ensures reliable operation in harsh industrial environments. For a conveyor belt application, the L9958 drives the motor with controlled acceleration and deceleration, reducing mechanical stress. The SPI interface allows the PLC or microcontroller to monitor motor current and detect jams or overloads. The low RDSON reduces energy consumption, which is critical in continuous-duty applications. The device's thermal performance, aided by the exposed pad, allows it to handle sustained currents without derating. Compared to relay-based motor control, the L9958 offers faster switching and better efficiency, while providing diagnostic capabilities that improve system uptime.
推荐
Robotics
The L9958 is well-suited for robotics applications, where precise motor control and compact design are essential. Its SPI interface allows for daisy-chaining multiple drivers, enabling control of multiple motors with a single microcontroller. The low RDSON and thermal performance make it suitable for driving small to medium-sized DC motors in robotic arms and mobile robots. In a robotic arm, the L9958 controls each joint motor with high precision, using the SPI interface to set current limits and read back position feedback. The device's protection features prevent damage from mechanical stalls or overcurrent conditions. The compact PowerSO-20 package saves board space, allowing for more compact robot designs. Compared to using discrete H-Bridges, the L9958 reduces component count and simplifies the PCB layout, improving reliability and reducing assembly time.
推荐
Medical Equipment
The L9958 can be used in medical equipment such as infusion pumps, ventilators, and diagnostic devices that require precise motor control. Its SPI interface provides the necessary control and monitoring capabilities, while the low RDSON ensures efficient operation. The device's reliability and protection features are critical in medical applications where failure is not an option. In an infusion pump, the L9958 drives a stepper motor to control the flow rate with high accuracy. The SPI interface allows the microcontroller to monitor motor current and detect occlusions or empty reservoirs. The device's low power dissipation is important in battery-powered portable devices. The robust design ensures long-term reliability, which is essential for medical devices that must operate continuously. Compared to less sophisticated motor drivers, the L9958 offers better control and diagnostics, improving patient safety.
推荐
Aerospace and Defense
The L9958 is designed to operate under extreme environmental conditions, making it suitable for aerospace and defense applications. It can be used in actuators for flight control surfaces, landing gear, and other critical systems. The SPI interface allows for redundant control and monitoring, enhancing system reliability. In a flight control actuator, the L9958 drives a DC motor with high precision, using the SPI interface to provide real-time feedback on position and current. The device's wide operating temperature range and robust construction ensure reliable operation in harsh conditions. The low RDSON minimizes power loss, which is critical in power-constrained aerospace systems. The device's protection features prevent damage from overcurrent or overtemperature, which is essential in safety-critical applications. Compared to less robust motor drivers, the L9958 offers superior performance and reliability, meeting the stringent requirements of aerospace and defense.
推荐
Consumer Electronics
The L9958 can be used in consumer electronics such as printers, cameras, and home appliances that require motor control. Its SPI interface allows for easy integration with consumer-grade microcontrollers, while the low RDSON ensures efficient operation. The device's compact package and low cost make it suitable for high-volume consumer products. In a printer, the L9958 drives the paper feed motor and the print head carriage motor with precise control. The SPI interface allows the printer's main controller to coordinate motor movements and monitor for paper jams. The device's low power dissipation is important in energy-efficient consumer products. The compact PowerSO-20 package saves board space, allowing for smaller product designs. Compared to using discrete H-Bridges, the L9958 reduces component count and simplifies the design, reducing manufacturing cost and improving reliability.
推荐
推荐产品汇总
工程参考数据： L9958 ——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 | L9950 | VNH5019A | BTN8982TA |
|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Infineon |
| Interface | SPI | SPI | PWM | PWM |
| Motor Type | DC, Stepper | DC | DC | DC |
| RDSON | Low | Low | 55 mOhm | 9.5 mOhm |
| Protection | Overcurrent, Overtemperature | Overcurrent, Overtemperature | Overcurrent, Overtemperature | Overcurrent, Overtemperature |
关键差异点
- SPI interface for control and diagnostics （对比 VNH5019A)
- Designed for safety-critical applications （对比 BTN8982TA)
- Supports both DC and stepper motors （对比 L9950)
设计说明
The L9958 in PowerSO-20 package with exposed pad requires proper thermal management. Connect the exposed pad to a large copper area on the PCB to dissipate heat effectively. For high-current applications, consider using thermal vias to transfer heat to other layers. Ensure the PCB has adequate copper thickness and area to keep the junction temperature within safe limits.
Place decoupling capacitors close to the VS and GND pins to minimize voltage spikes. Use a 100nF ceramic capacitor and a 10uF electrolytic capacitor in parallel. For the SPI interface, keep traces short and use proper termination to avoid signal integrity issues. Route the SPI lines away from high-current motor traces to reduce noise coupling.
Ensure the supply voltage does not exceed the absolute maximum rating. The SPI interface should be properly initialized before enabling the motor outputs. Avoid driving the motor without a proper freewheeling diode or snubber circuit to prevent voltage spikes from damaging the device. Always monitor the fault status via SPI to detect overcurrent or overtemperature conditions.
合规信息
RoHS compliant per distributor listings. AEC-Q100 qualification not specified in available data.
