L9976-TR - Automotive Dual H-Bridge Motor Driver | STMicroelectronics
MPN: L9976-TR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
Drop-in alternatives for L9976-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:
L9976
β Drop-Inβ 99,999 In Stock
$2.88 / Unit
View Datasheet βL9976-TR-Q1
β Drop-Inπ Reference alternative (not in catalog)
DRV8876
β Drop-Inπ Reference alternative (not in catalog)
DRV8876-Q1
β Drop-Inπ Reference alternative (not in catalog)
L9976-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 |
| Control Interface | SPI |
| Package | PowerSO-20 |
| Operating Temperature Range | -40Β°C to +150Β°C |
| RDS(on) (typical) | 0.5 Ξ© |
| Overcurrent Protection | Yes |
| Overtemperature Shutdown | Yes |
| Undervoltage Lockout | Yes |
| AEC-Q100 Qualification | Yes |
| RoHS Compliant | Yes |
| Mounting Type | Surface Mount |
| Thermal Resistance (junction-to-ambient) | 35 Β°C/W |
| Quiescent Current | 5 mA (typical) |
L9976-TR Pin Configuration
| Pin 1 | OUT1 β H-bridge 1 output |
| Pin 2 | OUT2 β H-bridge 1 output |
| Pin 3 | GND β Ground |
| Pin 4 | VS β Supply voltage |
| Pin 5 | OUT3 β H-bridge 2 output |
| Pin 6 | OUT4 β H-bridge 2 output |
| Pin 7 | GND β Ground |
| Pin 8 | VS β Supply voltage |
| Pin 9 | SCK β SPI clock |
| Pin 10 | SDI β SPI data input |
| Pin 11 | SDO β SPI data output |
| Pin 12 | CS β SPI chip select |
| Pin 13 | EN β Enable |
| Pin 14 | DIAG β Diagnostic output |
| Pin 15 | GND β Ground |
| Pin 16 | VS β Supply voltage |
| Pin 17 | OUT5 β H-bridge 3 output (if applicable) |
| Pin 18 | OUT6 β H-bridge 3 output (if applicable) |
| Pin 19 | GND β Ground |
| Pin 20 | 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
L9976-TR is suitable for 6 applications: Automotive Window Lift, Mirror Adjustment, HVAC Actuator, Stepper Motor Control, Headlamp Leveling, Industrial Automation.
Automotive Window Lift
The L9976-TR drives the DC motor for window lift systems. Its 1.2 A continuous output current and 36 V supply voltage rating make it suitable for 12 V automotive systems. The SPI interface allows for precise control and diagnostics, enabling features like anti-pinch detection. The device's overcurrent and overtemperature protection ensure safe operation during motor stall conditions. The PowerSO-20 package provides efficient heat dissipation, which is critical for continuous operation in door modules.
Recommended
Mirror Adjustment
The L9976-TR is used to drive the small DC motors that adjust side mirrors. Its low RDS(on) of 0.5 Ξ© minimizes power loss, which is important for battery-powered systems. The device's wide supply voltage range accommodates voltage fluctuations during engine start. The SPI interface enables precise positioning and feedback for memory mirror functions. The compact PowerSO-20 package fits into the limited space inside the mirror housing.
Recommended
HVAC Actuator
The L9976-TR drives the actuators that control air flow in HVAC systems. Its ability to handle up to 1.2 A continuous current is sufficient for small flap actuators. The device's protection features, including overcurrent and overtemperature shutdown, ensure reliable operation in the harsh under-dash environment. The SPI interface allows for diagnostics and fault reporting, which is valuable for vehicle diagnostics. The wide temperature range of -40Β°C to +150Β°C ensures operation in extreme climates.
Recommended
Stepper Motor Control
The L9976-TR can drive bipolar stepper motors by using its two H-bridges to control the two phases. The SPI interface allows for precise current control, enabling microstepping for smooth motion. This is useful for applications like instrument cluster needles and headlamp leveling. The device's low RDS(on) reduces heat generation, allowing for continuous operation. The AEC-Q100 qualification ensures reliability in automotive applications.
Recommended
Headlamp Leveling
The L9976-TR drives the stepper motor used for headlamp leveling systems. The device's precise current control via SPI enables accurate positioning of the headlamp beam. The wide supply voltage range ensures operation during voltage transients. The protection features prevent damage from motor stalls or short circuits. The PowerSO-20 package is suitable for the space-constrained environment near the headlamps.
Recommended
Industrial Automation
Although designed for automotive, the L9976-TR can be used in industrial automation for driving small DC motors and actuators. Its wide supply voltage range and robust protection features make it suitable for 24 V industrial systems. The SPI interface allows for integration with industrial microcontrollers. The device's thermal performance is adequate for moderate current applications. The AEC-Q100 qualification provides confidence in reliability, though it is not required for industrial use.
Recommended
Recommended Products Summary
Engineering reference data for L9976-TR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9976 | L9976-TR-Q1 | DRV8876 | DRV8876-Q1 |
|---|---|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 | PowerSO-20 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 5.5 V to 36 V | 5.5 V to 36 V | 5.5 V to 36 V | 4.5 V to 37 V | 4.5 V to 37 V |
| Output Current per Channel | 1.2 A continuous, 2 A peak | 1.2 A continuous, 2 A peak | 1.2 A continuous, 2 A peak | 1.5 A continuous, 2 A peak | 1.5 A continuous, 2 A peak |
| Control Interface | SPI | SPI | SPI | PWM/PH-EN | PWM/PH-EN |
| AEC-Q100 Qualification | Yes | Yes | Yes | No | Yes |
| RDS(on) (typical) | 0.5 Ξ© | 0.5 Ξ© | 0.5 Ξ© | 0.4 Ξ© | 0.4 Ξ© |
| Operating Temperature Range | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +150Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C |
Key Differentiators
- AEC-Q100 qualified for automotive use (vs DRV8876 (non-Q1))
- SPI interface for advanced diagnostics (vs DRV8876)
- Wider operating temperature range (vs DRV8876)
Design Notes
The L9976-TR in PowerSO-20 package has a thermal resistance of 35 Β°C/W (junction-to-ambient). At 1.2 A per channel with a supply voltage of 12 V and motor resistance of 6 Ξ©, power dissipation is approximately 1.44 W per channel, leading to a temperature rise of 50Β°C above ambient. Ensure adequate PCB copper area and thermal vias to keep the junction temperature within limits.
Place decoupling capacitors (100 nF and 10 Β΅F) close to the VS pins to suppress voltage transients. Use a ground plane to minimize noise and provide a low-impedance path for return currents. The exposed pad should be soldered to a large copper area for heat dissipation.
When driving inductive loads, always use external flyback diodes or the internal body diodes may not be sufficient to handle the inductive kickback. Ensure the SPI lines are properly terminated to avoid signal integrity issues. Do not exceed the absolute maximum ratings for supply voltage and output current.
Compliance Information
AEC-Q100 qualified per STMicroelectronics datasheet. RoHS compliant.
