L9970-TR - Automotive Dual H-Bridge Motor Driver | STMicroelectronics
MPN: L9970-TR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $2.92 | $29.20 |
| 100 | $2.6 | $260.00 |
| 500 | $2.34 | $1,170.00 |
| 1,000 | $2.08 | $2,080.00 |
Drop-in alternatives for L9970-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:
L9970
β Drop-Inβ 99,999 In Stock
$1.6 / Unit
View Datasheet βL9970-TR
β Drop-Inβ 99,999 In Stock
$2.08 / Unit
View Datasheet βDRV8801
β Drop-Inπ Reference alternative (not in catalog)
A4950
β Drop-Inπ Reference alternative (not in catalog)
L9970-TR Maximum Ratings & Electrical Characteristics
| Supply Voltage Range | 5.5 V to 36 V |
| Output Current per Channel | 1.2 A continuous, 2 A peak |
| Number of H-Bridges | 2 |
| Output Configuration | Dual H-bridge |
| Control Interface | Parallel logic inputs |
| PWM Frequency | Up to 20 kHz |
| On-Resistance (per MOSFET) | 0.5 ohm typical |
| Quiescent Current | 5 mA typical |
| Thermal Shutdown | Yes |
| Overcurrent Protection | Yes |
| Undervoltage Lockout | Yes |
| Operating Temperature Range | -40Β°C to +150Β°C |
| Package | PowerSO-20 |
| Mounting Type | Surface Mount |
| AEC-Q100 Qualified | Yes |
| RoHS Compliant | Yes |
L9970-TR Pin Configuration
| Pin 1 | OUT1 β H-bridge 1 output |
| Pin 2 | OUT2 β H-bridge 1 output |
| Pin 3 | VS β Supply voltage |
| Pin 4 | GND β Ground |
| Pin 5 | IN1 β Control input for H-bridge 1 |
| Pin 6 | IN2 β Control input for H-bridge 1 |
| Pin 7 | EN1 β Enable for H-bridge 1 |
| Pin 8 | DIAG1 β Diagnostic output for H-bridge 1 |
| Pin 9 | OUT3 β H-bridge 2 output |
| Pin 10 | OUT4 β H-bridge 2 output |
| Pin 11 | VS β Supply voltage |
| Pin 12 | GND β Ground |
| Pin 13 | IN3 β Control input for H-bridge 2 |
| Pin 14 | IN4 β Control input for H-bridge 2 |
| Pin 15 | EN2 β Enable for H-bridge 2 |
| Pin 16 | DIAG2 β Diagnostic output for H-bridge 2 |
| Pin 17 | NC β No connect |
| Pin 18 | NC β No connect |
| Pin 19 | NC β No connect |
| Pin 20 | NC β No connect |
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
L9970-TR is suitable for 6 applications: Automotive Power Windows, Seat Adjustment Systems, HVAC Actuators, Industrial Automation, Robotics, Mechatronics.
Automotive Power Windows
The L9970-TR drives DC motors for power windows, providing bidirectional control and protection. Its 1.2 A continuous output current and 36 V supply range handle window lift motors efficiently. The AEC-Q100 qualification ensures reliability in automotive environments. In a typical power window system, the L9970-TR is controlled by a body control module (BCM) via logic inputs, with PWM for speed control. The integrated overcurrent protection prevents motor stall damage, and thermal shutdown protects the device during prolonged operation. Compared to discrete H-bridge designs, the L9970-TR reduces component count and PCB area, improving system reliability.
Recommended
Seat Adjustment Systems
The L9970-TR is used in seat adjustment systems to drive multiple DC motors for forward/backward, recline, and lumbar support. Its dual H-bridge configuration allows independent control of two motors, simplifying the design. The wide supply voltage range accommodates both 12 V and 24 V systems. In a seat adjustment module, the L9970-TR receives commands from a seat control unit, driving motors with PWM for smooth operation. The device's current sensing capability enables stall detection, preventing damage to the motor and mechanism. The PowerSO-20 package's thermal performance supports continuous operation under load.
Recommended
HVAC Actuators
The L9970-TR drives DC motors in HVAC actuators for air flow control, temperature mixing, and mode selection. Its low on-resistance (0.5 ohm) minimizes power dissipation, improving energy efficiency in the vehicle. The device's protection features ensure reliable operation in the harsh under-dash environment. In an HVAC actuator, the L9970-TR is controlled by the climate control module, with position feedback from a potentiometer. The dual H-bridge allows driving two actuators simultaneously, reducing component count. The device's thermal shutdown prevents overheating during extended operation.
Recommended
Industrial Automation
The L9970-TR is suitable for industrial automation applications such as conveyor belt control, valve actuation, and robotic arm movement. Its wide supply voltage range (5.5 V to 36 V) allows use in both 12 V and 24 V industrial systems. The device's robust protection features ensure reliable operation in industrial environments. In a conveyor system, the L9970-TR drives a DC motor with PWM speed control, with overcurrent protection preventing motor damage. The dual H-bridge configuration enables bidirectional control, allowing for forward and reverse operation. The PowerSO-20 package's thermal performance supports continuous operation in industrial settings.
Recommended
Robotics
The L9970-TR is used in robotics for driving DC motors in wheeled robots, robotic arms, and actuators. Its dual H-bridge allows independent control of two motors, enabling differential drive for mobile robots. The device's PWM capability supports speed and direction control, essential for precise robot movement. In a mobile robot, the L9970-TR is controlled by an MCU, with PWM signals for motor speed and direction. The integrated current sensing enables torque control and obstacle detection. The device's compact PowerSO-20 package saves PCB space, making it ideal for space-constrained robot designs.
Recommended
Mechatronics
The L9970-TR is applied in mechatronic systems such as automated valves, pumps, and positioning stages. Its wide supply voltage range and robust protection features make it suitable for various mechatronic applications. The device's dual H-bridge configuration allows driving two actuators independently, simplifying system design. In a mechatronic valve, the L9970-TR drives a DC motor to open and close the valve, with position feedback from a sensor. The device's overcurrent protection prevents damage during valve jams. The PowerSO-20 package's thermal performance supports continuous operation in industrial mechatronic systems.
Recommended
Recommended Products Summary
Engineering reference data for L9970-TR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9970 | DRV8801 | A4950 |
|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | Texas Instruments | Allegro MicroSystems |
| Supply Voltage Range | 5.5 V to 36 V | 5.5 V to 36 V | 8 V to 36 V | 8 V to 40 V |
| Output Current per Channel | 1.2 A continuous | 1.2 A continuous | 1.5 A continuous | 1.5 A continuous |
| Number of H-Bridges | 2 | 2 | 2 | 2 |
| On-Resistance | 0.5 ohm | 0.5 ohm | 0.4 ohm | 0.6 ohm |
| AEC-Q100 Qualified | Yes | Yes | No | Yes |
| Price (1 pcs) | $3.25 | $3.25 | $2.50 | $2.80 |
Key Differentiators
- AEC-Q100 qualified for automotive use (vs DRV8801)
- Wide supply voltage range of 5.5 V to 36 V (vs DRV8801)
- Lower on-resistance of 0.5 ohm (vs A4950)
Design Notes
The PowerSO-20 package has a thermal resistance of 35 Β°C/W. At maximum continuous current of 1.2 A per channel and a supply voltage of 12 V, power dissipation can reach 2.9 W per channel (assuming 0.5 ohm on-resistance). Ensure adequate PCB copper area and thermal vias to keep the junction temperature below 150 Β°C. For high ambient temperatures, consider adding a heatsink or reducing output current.
Place 100 nF ceramic capacitors close to each VS pin and a 10 Β΅F electrolytic capacitor at the supply input to decouple high-frequency noise and handle current transients. Use wide traces for the motor output pins to minimize voltage drops and inductance. The exposed thermal pad should be soldered to a large copper pour for effective heat dissipation.
Do not exceed the absolute maximum supply voltage of 40 V. Ensure the logic inputs are not left floating; use pull-up or pull-down resistors as needed. The diagnostic pins are open-drain and require external pull-up resistors. When driving inductive loads, place freewheeling diodes across the motor terminals to prevent voltage spikes that could damage the device.
Compliance Information
RoHS compliant and AEC-Q100 qualified per STMicroelectronics product page. REACH compliance is assumed based on ST's general compliance, but not explicitly stated in the provided data.
