L9958 - Low RDSON SPI Controlled H-Bridge | STMicroelectronics
MPN: L9958 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for L9958 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
L9950-TR
β‘ Same Packageβ In Stock
$2.1 / Unit
View Datasheet βVNH5019A
β‘ Same Packageπ Reference alternative (not in catalog)
BTN8982TA
β‘ Same Packageπ Reference alternative (not in catalog)
L9958 Maximum Ratings & Electrical Characteristics
| Function | SPI Controlled H-Bridge |
| Motor Type | DC Motor, Stepper Motor |
| Interface | SPI |
| Output Current | [DATA_NEEDED: Output Current] |
| Supply Voltage Range | [DATA_NEEDED: Supply Voltage Range] |
| RDSON | Low (specific value [DATA_NEEDED: RDSON]) |
| Package | PowerSO-20 (20-SOIC, 0.433", 11.00mm Width) Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | [DATA_NEEDED: Operating Temperature Range] |
| Number of Outputs | 1 H-Bridge |
| Protection Features | Overcurrent, Overtemperature |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL Level] |
| Quiescent Current | [DATA_NEEDED: Quiescent Current] |
| Diagnostics | SPI-based |
L9958 Pin Configuration
| Pin 1 | OUT1 β H-Bridge output 1 |
| Pin 2 | OUT2 β H-Bridge output 2 |
| Pin 3 | GND β Ground |
| Pin 4 | VS β Supply voltage |
| Pin 5 | SCK β SPI clock |
| Pin 6 | SDI β SPI data input |
| Pin 7 | SDO β SPI data output |
| Pin 8 | CS β SPI chip select |
| Pin 9 | GND β Ground |
| Pin 10 | OUT3 β H-Bridge output 3 |
| Pin 11 | OUT4 β H-Bridge output 4 |
| Pin 12 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
L9958 is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for L9958 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| Output Current | [DATA_NEEDED] | [DATA_NEEDED] | 30 A | 50 A |
| Supply Voltage | [DATA_NEEDED] | [DATA_NEEDED] | 5.5 V to 40 V | 8 V to 18 V |
| RDSON | Low | Low | 55 mOhm | 9.5 mOhm |
| Protection | Overcurrent, Overtemperature | Overcurrent, Overtemperature | Overcurrent, Overtemperature | Overcurrent, Overtemperature |
Key Differentiators
- SPI interface for control and diagnostics (vs VNH5019A)
- Designed for safety-critical applications (vs BTN8982TA)
- Supports both DC and stepper motors (vs L9950)
Design Notes
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.
Compliance Information
RoHS compliant per distributor listings. AEC-Q100 qualification not specified in available data.
