L9974-TR - Automotive Quad Half-Bridge Driver | STMicroelectronics
MPN: L9974-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 L9974-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:
L9973-TR
β Drop-Inβ 99,999 In Stock
$2.08 / Unit
View Datasheet βL9974-TR Maximum Ratings & Electrical Characteristics
| Supply Voltage Range | 5.5 V to 36 V |
| Output Current per Channel | 1.2 A (continuous) |
| Number of Half-Bridges | 4 |
| On-Resistance (typical) | 0.5 ohm |
| Quiescent Current (standby) | 10 uA |
| SPI Interface | Yes, up to 5 MHz |
| Protection Features | Overcurrent, overtemperature, short-circuit |
| Operating Temperature Range | -40C to +150C |
| Package | PowerSO-20 |
| Mounting Type | Surface Mount |
| Thermal Resistance (junction-to-ambient) | 35 C/W |
| AEC-Q100 Qualification | Yes |
| RoHS Status | Compliant |
| Output Type | Half-bridge |
| Control Interface | SPI |
L9974-TR Pin Configuration
| Pin 1 | OUT1 β Half-bridge 1 output |
| Pin 2 | OUT2 β Half-bridge 2 output |
| Pin 3 | GND β Ground |
| Pin 4 | OUT3 β Half-bridge 3 output |
| Pin 5 | OUT4 β Half-bridge 4 output |
| Pin 6 | VCC β Supply voltage |
| Pin 7 | GND β Ground |
| Pin 8 | SPI_CS β SPI chip select |
| Pin 9 | SPI_CLK β SPI clock |
| Pin 10 | SPI_MOSI β SPI data input |
| Pin 11 | SPI_MISO β SPI data output |
| Pin 12 | EN β Enable pin |
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
L9974-TR is suitable for 6 applications: Automotive Power Windows, DC Motor Control in Industrial Automation, Stepper Motor Driver for 3D Printers, Automotive Mirror Adjustment, Battery-Powered Robotics, Industrial Valve Actuator.
Automotive Power Windows
The L9974-TR drives the window lift motor bidirectionally. Its 1.2A output current and 36V supply range handle the motor's inrush current. The SPI interface provides diagnostic feedback for stall detection, enabling anti-pinch functionality. The AEC-Q100 qualification ensures reliability in extreme temperatures.
Recommended
DC Motor Control in Industrial Automation
In industrial automation, the L9974-TR controls conveyor belt motors or actuator motors. Its wide supply range (5.5V to 36V) accommodates various industrial power rails. The overcurrent and overtemperature protection prevent damage during overloads. The low standby current reduces energy consumption in idle states.
Recommended
Stepper Motor Driver for 3D Printers
The L9974-TR can drive a bipolar stepper motor by using its four half-bridges. Each phase is controlled by a pair of half-bridges, allowing precise positioning. The SPI interface enables microstepping control. The thermal performance of the PowerSO-20 package supports continuous operation.
Recommended
Automotive Mirror Adjustment
The L9974-TR drives the mirror adjustment motors for horizontal and vertical movement. Its compact size and low quiescent current are ideal for body control modules. The SPI diagnostics allow the ECU to detect mirror position faults. The AEC-Q100 qualification ensures long-term reliability.
Recommended
Battery-Powered Robotics
In battery-powered robots, the L9974-TR drives two DC motors for locomotion. Its low standby current (10uA) extends battery life. The wide supply range allows operation from 2S LiPo batteries (7.4V) or 3S (11.1V). The protection features prevent motor stall damage.
Recommended
Industrial Valve Actuator
The L9974-TR controls the motor in a valve actuator, providing precise open/close control. Its SPI interface allows the controller to read position feedback. The overcurrent protection prevents damage if the valve jams. The wide temperature range (-40C to +150C) suits harsh industrial environments.
Recommended
Recommended Products Summary
Engineering reference data for L9974-TR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9973-TR | DRV8804 |
|---|---|---|---|
| Package | PowerSO-20 | PowerSO-20 | HTSSOP-20 |
| Brand | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Number of Half-Bridges | 4 | 2 | 4 |
| Output Current per Channel | 1.2 A | 1.2 A | 1.5 A |
| Supply Voltage Range | 5.5V to 36V | 5.5V to 36V | 8.2V to 45V |
| On-Resistance | 0.5 ohm | 0.5 ohm | 0.35 ohm |
| SPI Interface | Yes | Yes | Yes |
| AEC-Q100 | Yes | Yes | No |
Key Differentiators
- Four half-bridges in one package (vs L9973-TR)
- AEC-Q100 qualified (vs DRV8804)
- Wide supply voltage range (vs DRV8804)
Design Notes
The PowerSO-20 package has a thermal resistance of 35 C/W. At 1.2A per channel with 0.5 ohm on-resistance, each channel dissipates 0.72W. With all four channels active, total dissipation is 2.88W, causing a 100C temperature rise. Ensure adequate PCB copper area or forced airflow for high-duty-cycle operation.
Place a 100nF ceramic capacitor close to the VCC pin and a 10uF electrolytic capacitor nearby to handle current transients. Keep SPI traces short and shielded to prevent noise coupling. Use a ground plane to minimize inductance.
Do not exceed the absolute maximum supply voltage of 40V. Ensure the SPI lines are not left floating during power-up; pull them to known states. The enable pin must be driven high to activate outputs; otherwise, outputs are high-impedance.
Compliance Information
RoHS compliant and AEC-Q100 qualified per STMicroelectronics datasheet. Halogen-free status not specified.
