L9935-TR - Dual H-Bridge Motor Driver | STMicroelectronics
MPN: L9935-TR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for L9935-TR 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:
L9935
β Drop-Inβ 99,999 In Stock
$1.85 / Unit
View Datasheet βL9935D
β Drop-Inπ Reference alternative (not in catalog)
L9935E
β Drop-Inπ Reference alternative (not in catalog)
DRV8801
β Drop-Inπ Reference alternative (not in catalog)
L9935-TR Maximum Ratings & Electrical Characteristics
| Supply Voltage Range | 5 V to 40 V |
| Output Current per Channel | 1.2 A |
| Number of Channels | 2 (dual H-bridge) |
| Output Voltage | Up to 40 V |
| Quiescent Current (Standby) | 10 uA (typ) |
| Operating Junction Temperature | -40C to +150C |
| Package | PowerSO-20 |
| Mounting Type | Surface Mount |
| Thermal Resistance (junction-to-ambient) | 35 C/W |
| Control Interface | Parallel (IN1, IN2, EN1, EN2) |
| Protection Features | Thermal shutdown, overcurrent protection |
| Standby Mode | Yes |
| RoHS Status | Compliant |
| MSL Level | 3 |
| Output Type | Dual H-bridge |
L9935-TR Pin Configuration
| Pin 1 | VS β Supply voltage |
| Pin 2 | OUT1 β Motor output 1 |
| Pin 3 | OUT2 β Motor output 2 |
| Pin 4 | GND β Ground |
| Pin 5 | IN1 β Control input 1 |
| Pin 6 | IN2 β Control input 2 |
| Pin 7 | EN1 β Enable input 1 |
| Pin 8 | EN2 β Enable input 2 |
| Pin 9 | OUT3 β Motor output 3 |
| Pin 10 | OUT4 β Motor output 4 |
| Pin 11 | GND β Ground |
| Pin 12 | VS β Supply voltage |
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-TR is suitable for 6 applications: Automotive Seat Adjustment, Industrial Automation, Medical Equipment, Robotics, Home Appliances, Power Tools.
Automotive Seat Adjustment
The L9935-TR drives DC motors for seat position adjustment. Its 1.2A per channel output and 5-40V supply range match automotive power rails. The thermal shutdown protection ensures safe operation under continuous load. In a typical seat adjustment system, the L9935-TR is controlled by a body control module (BCM) via parallel inputs, driving the motor forward or reverse. The wide temperature range (-40C to +150C) allows operation in harsh automotive environments. Compared to discrete H-bridge designs, the integrated driver reduces component count and PCB area, improving reliability.
Recommended
Industrial Automation
In industrial automation, the L9935-TR drives small DC motors in conveyor systems, actuators, and robotic arms. Its 5-40V supply range accommodates 24V industrial buses. The overcurrent protection prevents damage from stalled motors. The device's parallel interface simplifies integration with PLCs or microcontrollers. For a 24V system, the L9935-TR can deliver up to 1.2A, sufficient for many small actuators. The PowerSO-20 package with exposed pad aids heat dissipation in enclosed control cabinets. Compared to relay-based control, the L9935-TR offers faster switching and longer lifespan.
Recommended
Medical Equipment
The L9935-TR is used in medical devices such as infusion pumps and diagnostic equipment to drive small motors. Its low standby current (10 uA) is critical for battery-powered portable devices. The thermal shutdown ensures safe operation in compact enclosures. In an infusion pump, the L9935-TR drives a stepper motor for precise fluid delivery. The dual H-bridge allows full-step control, ensuring accurate dosing. The device's wide temperature range and reliability make it suitable for medical environments. Compared to linear drivers, the H-bridge topology provides efficient bidirectional control.
Recommended
Robotics
In robotics, the L9935-TR drives DC motors for wheel movement and actuator control. Its 1.2A per channel output is suitable for small to medium robots. The parallel interface allows direct connection to microcontrollers. For a two-wheel robot, the L9935-TR can drive both motors independently, enabling differential steering. The thermal shutdown protects the driver during high-load conditions. The device's compact PowerSO-20 package saves space on robot PCBs. Compared to discrete H-bridges, the integrated driver simplifies design and reduces component count.
Recommended
Home Appliances
The L9935-TR is used in home appliances like washing machines and dishwashers to drive pumps and valves. Its 5-40V supply range covers various appliance power rails. The overcurrent protection prevents damage from jammed mechanisms. In a washing machine, the L9935-TR drives the drain pump motor. The device's low standby current reduces power consumption when the appliance is idle. The wide temperature range ensures reliable operation in humid environments. Compared to relay-based control, the L9935-TR offers smoother motor control and longer lifespan.
Recommended
Power Tools
In power tools, the L9935-TR drives brushed DC motors for drilling and cutting. Its 1.2A output is suitable for compact tools. The thermal shutdown protects the driver during prolonged use. The device's wide supply range allows operation from various battery voltages. In a cordless drill, the L9935-TR controls motor speed and direction. The parallel interface enables simple control from a trigger switch. The PowerSO-20 package with exposed pad aids heat dissipation in handheld tools. Compared to discrete H-bridges, the integrated driver reduces size and weight.
Recommended
Recommended Products Summary
Engineering reference data for L9935-TR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9935 | L9935D | L9935E | DRV8801 |
|---|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Supply Voltage Range | 5V to 40V | 5V to 40V | 5V to 40V | 5V to 40V | 8V to 36V |
| Output Current per Channel | 1.2A | 1.2A | 1.5A | 2A | 1.5A |
| Standby Current | 10 uA | 10 uA | 10 uA | 10 uA | 1 uA |
| Thermal Shutdown | Yes | Yes | Yes | Yes | Yes |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | No |
| Control Interface | Parallel | Parallel | Parallel | Parallel | Parallel |
Key Differentiators
- AEC-Q100 qualified for automotive use (vs DRV8801)
- Wide supply voltage range (5V to 40V) (vs DRV8801)
- Low standby current (10 uA) (vs L9935D)
Design Notes
The L9935-TR in PowerSO-20 package has a thermal resistance of 35 C/W (junction-to-ambient). At 1.2A per channel and 12V supply, power dissipation can reach 2.9W (assuming 2V drop across output transistors). This would cause a 101.5C temperature rise above ambient. Ensure adequate PCB copper area (at least 1 square inch) or use a heatsink for continuous operation at high currents.
Place 100nF ceramic capacitors close to the VS pins for high-frequency decoupling. Use a 10uF electrolytic capacitor on the supply rail to handle motor current transients. Connect the exposed pad to the ground plane for improved thermal performance. Keep motor output traces short and wide to minimize inductance and resistance.
Always connect flyback diodes across motor terminals to protect the driver from inductive voltage spikes. Do not exceed the absolute maximum supply voltage of 40V. Ensure the enable pins are properly driven to avoid unintended motor activation. In standby mode, the quiescent current is 10 uA, but ensure the supply is stable to avoid false triggering.
Compliance Information
RoHS compliant per STMicroelectronics product page. AEC-Q100 qualified for automotive applications.
