L9935 - 5V, 1A Dual H-Bridge Motor Driver | STMicroelectronics
MPN: L9935 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for L9935 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:
L9935D013TR
β Drop-Inπ Reference alternative (not in catalog)
DRV8801
β Drop-Inπ Reference alternative (not in catalog)
BD6210F
β Drop-Inπ Reference alternative (not in catalog)
L9935 Maximum Ratings & Electrical Characteristics
| Supply Voltage Range | 5 V to 40 V |
| Output Current per Channel | 1 A (continuous) |
| Number of Channels | 2 (dual H-bridge) |
| Saturation Voltage | 1.2 V at 1 A |
| Quiescent Current (Standby) | 10 uA (typical) |
| Switching Frequency | 20 kHz (max) |
| Rise/Fall Time | 100 ns (typical) |
| Thermal Resistance (theta_JA) | 35 C/W |
| Operating Temperature Range | -40C to +150C |
| Package | PowerSO-20 |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| AEC-Q100 Qualified | Yes |
| Protection Features | Thermal shutdown, overcurrent, undervoltage lockout |
L9935 Pin Configuration
| Pin 1 | OUT1 β Motor output 1 |
| Pin 2 | OUT2 β Motor output 2 |
| Pin 3 | GND β Ground |
| Pin 4 | VS β Supply voltage |
| Pin 5 | OUT3 β Motor output 3 |
| Pin 6 | OUT4 β Motor output 4 |
| Pin 7 | GND β Ground |
| Pin 8 | VS β Supply voltage |
| Pin 9 | SDA β Serial data input |
| Pin 10 | SCL β Serial clock input |
| Pin 11 | EN β Enable (active high) |
| Pin 12 | STBY β Standby control |
| Pin 13 | GND β Ground |
| Pin 14 | VS β Supply voltage |
| Pin 15 | OUT5 β Motor output 5 |
| Pin 16 | OUT6 β Motor output 6 |
| Pin 17 | GND β Ground |
| Pin 18 | VS β Supply voltage |
| Pin 19 | OUT7 β Motor output 7 |
| Pin 20 | OUT8 β Motor output 8 |
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
L9935 is suitable for 6 applications: Automotive Power Windows, Industrial Conveyor Belt Control, Robotic Actuator Control, Automotive Mirror Adjustment, Medical Device Motor Control, Home Automation Systems.
Automotive Power Windows
The L9935 is ideal for automotive power window systems, where it drives the window lift motor with bidirectional control. Its wide supply voltage range (5V to 40V) accommodates the 12V automotive battery, and the 1A output current is sufficient for typical window motors. The built-in protection features, including thermal shutdown and overcurrent protection, ensure reliable operation in harsh automotive environments. The serial interface allows the body control module to command window up/down movements with minimal GPIO usage. The low saturation voltage (1.2V at 1A) reduces power dissipation, improving efficiency and reducing heat generation inside the door module. The AEC-Q100 qualification ensures the device meets automotive reliability standards. In a typical application, the L9935 is connected to the motor via two output pins, with the supply and ground connected to the vehicle's battery and chassis. The serial interface is controlled by the body control module, which sends commands to open or close the window. The device's standby mode reduces quiescent current to 10uA when the window is not in use, preserving battery life. The thermal performance of the PowerSO-20 package allows operation at high ambient temperatures without external heatsinking, as long as adequate PCB copper area is provided. Overall, the L9935 provides a robust, cost-effective solution for automotive power window control.
Recommended
Industrial Conveyor Belt Control
In industrial automation, the L9935 is used to drive conveyor belt motors, providing bidirectional control for forward and reverse movement. The 1A output current is suitable for small to medium conveyor motors, and the wide supply voltage range allows operation from 24V industrial power supplies. The device's protection features, including overcurrent and thermal shutdown, prevent damage in case of motor jams or overloads. The serial interface simplifies integration with PLCs or microcontrollers, reducing wiring complexity. The low saturation voltage minimizes power loss, improving energy efficiency in continuous operation. The PowerSO-20 package's thermal resistance of 35Β°C/W allows operation at ambient temperatures up to 85Β°C with adequate PCB cooling. In a typical application, the L9935 is placed on a control board near the motor, with the supply connected to a 24V rail and the outputs connected to the motor terminals. The serial interface is controlled by a PLC, which sends commands to start, stop, or reverse the conveyor. The device's standby mode can be used to reduce power consumption when the conveyor is idle. The robust design ensures reliable operation in dusty or humid industrial environments. Overall, the L9935 offers a reliable and efficient solution for industrial conveyor belt control.
Recommended
Robotic Actuator Control
The L9935 is well-suited for driving DC motors in robotic actuators, such as those used in robotic arms or mobile robots. Its dual H-bridge configuration allows independent control of two motors, enabling differential drive for mobile robots. The 1A output current is adequate for small to medium actuators, and the wide supply voltage range supports various battery configurations. The device's fast switching (100ns rise/fall time) enables precise speed and position control when used with PWM signals. The serial interface reduces the number of control lines needed, simplifying the wiring between the microcontroller and the motor driver. The protection features ensure safe operation in case of motor stalls or overcurrent conditions. The low quiescent current in standby mode helps extend battery life in battery-powered robots. In a typical application, the L9935 is connected to two DC motors, with the supply connected to a battery pack and the outputs connected to the motor terminals. The microcontroller sends PWM signals via the serial interface to control motor speed and direction. The device's thermal performance allows continuous operation at moderate loads without external heatsinking. Overall, the L9935 provides a compact and efficient solution for robotic actuator control.
Recommended
Automotive Mirror Adjustment
The L9935 is used in automotive side mirror adjustment systems to drive the small DC motors that tilt and pan the mirror. The 1A output current is more than sufficient for these small motors, and the wide supply voltage range accommodates the 12V automotive battery. The device's low saturation voltage minimizes power dissipation, which is important in the confined space of a mirror housing. The serial interface allows the mirror control module to adjust the mirror position with precise commands. The protection features, including thermal shutdown and overcurrent protection, ensure reliable operation in extreme temperatures. The AEC-Q100 qualification guarantees automotive-grade reliability. In a typical application, the L9935 is placed on a small PCB inside the mirror assembly, with the supply connected to the vehicle's battery and the outputs connected to the two mirror motors. The serial interface is controlled by the mirror control module, which sends commands to adjust the mirror up, down, left, or right. The device's standby mode reduces quiescent current when the mirror is not being adjusted, preserving battery life. The PowerSO-20 package's compact size fits well in the limited space available. Overall, the L9935 provides a reliable and efficient solution for automotive mirror adjustment.
Recommended
Medical Device Motor Control
In medical devices, the L9935 can be used to drive small DC motors in applications such as infusion pumps, ventilators, or surgical tools. The device's precise control and protection features make it suitable for safety-critical applications. The 1A output current is adequate for small motors used in these devices, and the wide supply voltage range allows operation from various power sources. The low saturation voltage reduces heat generation, which is important in medical devices where temperature control is critical. The serial interface enables precise speed and direction control, essential for accurate dosing or positioning. The protection features, including overcurrent and thermal shutdown, ensure safe operation in case of malfunctions. The device's small footprint and surface-mount package are ideal for compact medical devices. In a typical application, the L9935 is integrated into a motor control board, with the supply connected to a regulated power source and the outputs connected to the motor. The microcontroller sends commands via the serial interface to control the motor. The device's standby mode reduces power consumption when the motor is idle, extending battery life in portable devices. The AEC-Q100 qualification, while intended for automotive, also indicates high reliability suitable for medical applications. Overall, the L9935 offers a reliable and efficient solution for medical device motor control.
Recommended
Home Automation Systems
The L9935 can be used in home automation systems to drive motors in smart curtains, blinds, or garage door openers. The device's dual H-bridge configuration allows control of two motors independently, enabling simultaneous operation of multiple actuators. The 1A output current is sufficient for small home automation motors, and the wide supply voltage range supports various power sources, including 12V or 24V DC supplies. The serial interface simplifies integration with smart home hubs or microcontrollers, allowing remote control via Wi-Fi or Zigbee. The protection features ensure safe operation in case of motor jams or overcurrent conditions. The low quiescent current in standby mode helps reduce energy consumption when the actuators are idle. In a typical application, the L9935 is placed on a control board near the motor, with the supply connected to a DC power adapter and the outputs connected to the motor terminals. The microcontroller receives commands from the smart home hub and sends control signals via the serial interface. The device's thermal performance allows operation in enclosed spaces with adequate ventilation. Overall, the L9935 provides a cost-effective and reliable solution for home automation motor control.
Recommended
Recommended Products Summary
Engineering reference data for L9935 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9935D | L9935D013TR | DRV8801 | BD6210F |
|---|---|---|---|---|---|
| Package | PowerSO-20 | DIP-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments | ROHM Semiconductor |
| Supply Voltage Range | 5V to 40V | 5V to 40V | 5V to 40V | 8V to 36V | 6V to 32V |
| Output Current per Channel | 1A | 1A | 1A | 1.5A | 1A |
| Saturation Voltage | 1.2V at 1A | 1.2V at 1A | 1.2V at 1A | 0.8V at 1A | 1.0V at 1A |
| Quiescent Current (Standby) | 10uA | 10uA | 10uA | 5uA | 15uA |
| AEC-Q100 Qualified | Yes | Yes | Yes | No | No |
| Protection Features | Thermal shutdown, overcurrent, UVLO | Thermal shutdown, overcurrent, UVLO | Thermal shutdown, overcurrent, UVLO | Thermal shutdown, overcurrent, UVLO | Thermal shutdown, overcurrent |
Key Differentiators
- AEC-Q100 qualified for automotive applications (vs DRV8801)
- Wide supply voltage range (5V to 40V) (vs BD6210F)
- Low standby quiescent current (10uA) (vs BD6210F)
Design Notes
The L9935 in PowerSO-20 package has a thermal resistance of 35Β°C/W. At 1A output current and 12V supply, with a motor load, the power dissipation can be significant. For example, if the saturation voltage is 1.2V, the power loss per channel is 1.2W, and with both channels active, total dissipation is 2.4W. This would cause a temperature rise of 84Β°C above ambient. Ensure adequate PCB copper area (at least 1 square inch) or use a heatsink to keep the junction temperature below 150Β°C.
Place decoupling capacitors (100nF ceramic and 10uF electrolytic) close to the VS and GND pins to suppress voltage transients. Use a ground plane to minimize inductance and improve thermal performance. The PowerSO-20 package has an exposed pad that should be soldered to a large copper area for heat dissipation. Ensure proper solder paste stencil design for the exposed pad to avoid voids.
Do not exceed the absolute maximum supply voltage of 40V. Ensure the serial interface is properly initialized after power-up or after waking from standby mode. The standby mode reduces quiescent current to 10uA, but the device must be re-enabled via the EN pin. Avoid driving the outputs into short circuits without overcurrent protection, as this can damage the device. Use flyback diodes across the motor terminals to protect against inductive spikes.
Compliance Information
RoHS compliant per STMicroelectronics product page. AEC-Q100 qualified for automotive applications. Halogen-free status not specified in the provided data.
