L9960 - Dual H-Bridge Motor Driver | STMicroelectronics | Automotive
MPN： L9960 ✓ 啟用中L9960 概覽
A motor driver is an integrated circuit that translates low-power control signals from a microcontroller into high-current, high-voltage signals to drive motors. It typically includes H-bridge topologies for bidirectional control, protection features such as overcurrent and thermal shutdown, and diagnostic interfaces. Motor drivers are a subset of power management ICs, which manage and distribute power within electronic systems.
Key features of the L9960 include a low RDS(on) of 0.15 ohm per switch, which minimizes power dissipation and improves efficiency. It integrates a 10-bit current sense ADC for precise motor current monitoring, and a SPI interface for configuration and diagnostics. The device also features PWM current regulation, overcurrent protection, and thermal shutdown, ensuring robust operation in harsh environments.
The L9960 uses a smart power technology that combines high-voltage power MOSFETs with CMOS control logic on a single die. This integration reduces external component count and enhances reliability. The SPI interface allows real-time monitoring of bridge currents and fault conditions, enabling advanced motor control algorithms and predictive maintenance.
Typical applications include automotive body control modules, electric power steering, HVAC actuators, and industrial automation. In automotive body control, the L9960 drives window lifters, seat adjusters, and mirror motors with precise current control. In industrial settings, it controls conveyor belts and robotic arms with high reliability.
When designing with the L9960, ensure adequate PCB copper area for heat dissipation, especially at high currents. The exposed pad must be soldered to a thermal via array to maintain junction temperature within limits. Proper decoupling capacitors on the supply and logic pins are essential to minimize voltage transients.
直接替換替代品，適用於 L9960 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： L9960 （相同外形與佔位） — 差異在於 Package, AEC-Q100 Qualification, Protection Features.
L9960 最大額定值與電氣特性
| Supply Voltage Range | 4.5 V to 28 V |
| Output Current per Bridge | 8 A |
| Number of Bridges | 2 |
| RDS(on) per Switch | 0.15 ohm |
| Current Sense ADC Resolution | 10-bit |
| 介面 | SPI |
| PWM Current Regulation | Yes |
| 過電流保護 | Yes |
| 過熱關機 | Yes |
| 封裝 | TQFP-48 (EP) |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40C to +150C |
| Automotive Grade | AEC-Q100 |
| RoHS 狀態 | Compliant |
| MSL 等級 | 3 |
L9960 腳位配置
| 腳位 1 | VS — Motor supply voltage |
| 腳位 2 | OUT1 — H-bridge output 1 |
| 腳位 3 | OUT2 — H-bridge output 2 |
| 腳位 4 | GND — Ground |
| 腳位 5 | VDD — Logic supply voltage |
| 腳位 6 | SCK — SPI clock |
| 腳位 7 | SDI — SPI data input |
| 腳位 8 | SDO — SPI data output |
| 腳位 9 | CS — SPI chip select |
| 腳位 10 | EN — Enable pin |
| 腳位 11 | DIAG — Diagnostic output |
| 腳位 12 | ISENSE — Current sense output |
典型應用
L9960 適用於 6 應用s: Automotive Body Control Module, Electric Power Steering, HVAC Actuator Control, Industrial Automation, Throttle Control Actuator, Exhaust Gas Recirculation Valve.
Automotive Body Control Module
The L9960 drives window lifters, seat adjusters, and mirror motors with precise current control. Its 8 A per bridge capability and SPI interface enable efficient and reliable operation in body control modules. The device's AEC-Q100 qualification ensures it meets automotive reliability standards. In a typical body control module, the L9960 is placed between the microcontroller and the motor, with the SPI interface providing real-time current monitoring and fault diagnostics. The low RDS(on) of 0.15 ohm minimizes power loss, and the thermal shutdown protection prevents damage during overload conditions. Compared to discrete H-bridge designs, the L9960 reduces component count and PCB area, improving overall system reliability.
推薦
Electric Power Steering
The L9960 provides precise current control for the steering assist motor, ensuring smooth and responsive steering. Its high current capability and low RDS(on) are essential for the high-power demands of power steering systems. The SPI interface allows the ECU to monitor motor current and adjust assist levels in real-time. In an electric power steering system, the L9960 is connected between the ECU and the brushless DC motor, with the H-bridge configuration enabling bidirectional control. The device's overcurrent protection and thermal shutdown ensure safe operation under all conditions. Compared to linear drivers, the L9960's PWM current regulation improves efficiency and reduces heat generation, making it ideal for continuous operation.
推薦
HVAC Actuator Control
The L9960 drives HVAC actuators for air distribution and temperature control. Its 8 A per bridge capability and SPI interface enable precise positioning of flaps and valves. The device's wide supply voltage range (4.5 V to 28 V) makes it compatible with both 12 V and 24 V HVAC systems. In an HVAC system, the L9960 is used to control the brushless DC motors that adjust air flow and temperature. The SPI interface provides real-time current monitoring, allowing the HVAC controller to detect blockages or faults. The device's low RDS(on) minimizes power dissipation, and its thermal shutdown protection ensures reliable operation in the harsh under-dash environment.
推薦
Industrial Automation
The L9960 controls conveyor belts and robotic arms with high reliability. Its 8 A per bridge capability and SPI interface enable precise motor control in industrial environments. The device's wide supply voltage range and robust protection features make it suitable for 24 V industrial systems. In an industrial automation system, the L9960 is used to drive DC motors for conveyor belts, robotic arms, and other machinery. The SPI interface allows the PLC to monitor motor current and detect faults, enabling predictive maintenance. The device's low RDS(on) reduces power loss, and its thermal shutdown protection ensures safe operation in high-temperature environments.
推薦
Throttle Control Actuator
The L9960 is specifically designed for throttle control actuators, providing precise and reliable control of the throttle valve. Its high current capability and SPI interface enable accurate positioning, essential for engine performance and emissions control. The device's AEC-Q100 qualification ensures it meets automotive reliability standards. In a throttle control system, the L9960 is connected between the ECU and the DC motor that actuates the throttle valve. The SPI interface provides real-time current monitoring, allowing the ECU to detect faults and adjust control algorithms. The device's low RDS(on) minimizes power loss, and its overcurrent protection prevents damage during stall conditions.
推薦
Exhaust Gas Recirculation Valve
The L9960 drives the exhaust gas recirculation (EGR) valve, enabling precise control of exhaust gas flow for emissions reduction. Its high current capability and SPI interface ensure accurate valve positioning, critical for engine performance and compliance with emissions standards. The device's AEC-Q100 qualification ensures it meets automotive reliability requirements. In an EGR system, the L9960 is connected between the ECU and the DC motor that actuates the EGR valve. The SPI interface provides real-time current monitoring, allowing the ECU to detect valve faults and adjust control strategies. The device's low RDS(on) minimizes power dissipation, and its thermal shutdown protection ensures reliable operation in the high-temperature engine compartment.
推薦
推薦產品摘要
工程參考資料，適用於 L9960 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | L9960T | L9960TR | DRV8876 |
|---|---|---|---|---|
| Package | TQFP-48 (EP) | TQFP-48 (EP) - same | PowerSSO-36 - different | HTSSOP-16 - different |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Number of Bridges | 2 | 2 | 1 | 1 |
| Output Current per Bridge | 8 A | 8 A | 8 A | 3.5 A |
| Supply Voltage Range | 4.5 V to 28 V | 4.5 V to 28 V | 4.5 V to 28 V | 4.5 V to 37 V |
| RDS(on) | 0.15 ohm | 0.15 ohm | 0.15 ohm | 0.5 ohm |
| Interface | SPI | SPI | SPI | PWM |
| Current Sense ADC | 10-bit | 10-bit | 10-bit | None |
| Automotive Grade | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
主要差異化特點
- Dual H-bridge capability (對比L9960T)
- Low RDS(on) of 0.15 ohm (對比DRV8876)
- Integrated 10-bit current sense ADC (對比DRV8876)
設計說明
At 8 A per bridge and 0.15 ohm RDS(on), power dissipation per bridge is approximately 9.6 W. The TQFP-48 (EP) package has a thermal resistance of about 20 C/W, resulting in a junction temperature rise of 192C. A heatsink or substantial copper pour is required for reliable operation above 2 A continuous current.
Place decoupling capacitors (100 nF and 10 uF) close to the VS and VDD pins. Use a solid ground plane and connect the exposed pad to a thermal via array for heat dissipation. Keep SPI traces short and shielded to minimize noise.
Do not exceed the maximum supply voltage of 28 V. Ensure the SPI interface is properly configured before enabling the outputs. The current sense ADC requires a stable reference voltage for accurate readings. Avoid switching the H-bridge outputs without proper dead-time control to prevent shoot-through.
合規資訊
AEC-Q100 qualified for automotive applications. RoHS compliant per STMicroelectronics product page.
