L9975-TR - Automotive Quad Half-Bridge Driver | STMicroelectronics
MPN: L9975-TR 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 L9975-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:
L9975
β Drop-Inβ 99,999 In Stock
$2.2 / Unit
View Datasheet βTLE9201SG
β Drop-Inπ Reference alternative (not in catalog)
MC33887
β Drop-Inπ Reference alternative (not in catalog)
L9975-TR Maximum Ratings & Electrical Characteristics
| Number of Half-Bridges | 4 |
| Supply Voltage Range | 5.5 V to 36 V |
| Output Current per Channel | 1.2 A (continuous) |
| RDS(on) per Switch | 0.5 Ξ© (typ) |
| Quiescent Current (Standby) | 50 Β΅A (typ) |
| PWM Frequency | Up to 20 kHz |
| Control Interface | SPI |
| Diagnostic Output | Yes (SPI) |
| Overcurrent Protection | Yes |
| Thermal Shutdown | Yes |
| Operating Temperature Range | -40Β°C to +150Β°C (junction) |
| Package | SO-28 (exposed pad) |
| Mounting Type | Surface Mount |
| AEC-Q100 Qualification | Grade 1 |
| RoHS Status | Compliant |
| Charge Pump | Integrated |
L9975-TR Pin Configuration
| Pin 1 | OUT1 β Half-bridge 1 output |
| Pin 2 | OUT2 β Half-bridge 2 output |
| Pin 3 | OUT3 β Half-bridge 3 output |
| Pin 4 | OUT4 β Half-bridge 4 output |
| Pin 5 | VS β Supply voltage |
| Pin 6 | GND β Ground |
| Pin 7 | SPI_CS β SPI chip select |
| Pin 8 | SPI_CLK β SPI clock |
| Pin 9 | SPI_SDI β SPI data input |
| Pin 10 | SPI_SDO β SPI data output |
| Pin 11 | DIAG β Diagnostic output |
| Pin 12 | EN β Enable input |
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
L9975-TR is suitable for 6 applications: Automotive HVAC Flap Control, Headlamp Leveling System, Mirror Adjustment, Industrial Valve Actuation, Automotive Seat Adjustment, Robotics and Automation.
Automotive HVAC Flap Control
The L9975-TR drives DC motors for HVAC flap positioning in automotive climate control systems. Its four half-bridges can control multiple flaps independently, with SPI diagnostics for fault detection. The wide supply range (5.5V-36V) accommodates both 12V and 24V vehicle systems, and the AEC-Q100 Grade 1 qualification ensures reliable operation under extreme temperatures. The low standby current (50Β΅A) is critical for always-on modules to minimize battery drain. PWM capability up to 20kHz allows precise flap positioning and quiet operation. The integrated protection features (overcurrent, thermal shutdown) safeguard the motor and IC during stall conditions. In a typical system, the L9975-TR is connected to the body control module via SPI, and each half-bridge drives a flap motor with external freewheeling diodes for inductive load protection. The diagnostic output provides real-time status, enabling predictive maintenance and fault logging.
Recommended
Headlamp Leveling System
The L9975-TR is used in automatic headlamp leveling systems to adjust the vertical angle of headlights based on vehicle load. The four half-bridges can drive stepper motors or DC motors for precise leveling. The SPI interface allows the ECU to command position changes and read feedback from sensors. The wide supply range and automotive qualification make it suitable for under-hood environments. The low RDS(on) (0.5Ξ©) minimizes power loss, and the integrated charge pump ensures high-side drive without external components. In a typical application, the L9975-TR receives commands from a leveling ECU, and each half-bridge drives a motor with PWM for smooth adjustment. The diagnostic output can detect motor faults, such as open or short circuits, and report them to the ECU for driver notification. The thermal shutdown protects the IC during prolonged operation in high ambient temperatures.
Recommended
Mirror Adjustment
The L9975-TR drives the DC motors used for electric mirror adjustment in vehicles. Each half-bridge can control one axis of a mirror, allowing independent adjustment of horizontal and vertical tilt. The SPI interface enables precise control and status monitoring. The low quiescent current is beneficial for reducing battery drain when the vehicle is off. The device's protection features prevent damage from motor stalls or short circuits. In a typical application, the L9975-TR is controlled by a body control module, and each half-bridge drives a mirror motor with PWM for smooth movement. The diagnostic output can detect if a mirror is obstructed, allowing the system to stop and report an error. The wide supply range ensures compatibility with both 12V and 24V electrical systems.
Recommended
Industrial Valve Actuation
The L9975-TR is used in industrial automation to control solenoid valves and small DC motors. Its four half-bridges can drive multiple valves, and the SPI interface allows remote control and monitoring. The wide supply range (5.5V-36V) supports various industrial power rails. The device's robust protection features (overcurrent, thermal shutdown) ensure reliable operation in harsh environments. The low RDS(on) reduces power dissipation, and the PWM capability enables proportional control of valve position. In a typical application, the L9975-TR is connected to a PLC or industrial controller via SPI, and each half-bridge drives a valve actuator with PWM for precise flow control. The diagnostic output provides real-time status, enabling predictive maintenance. The AEC-Q100 qualification, while automotive-focused, also indicates high reliability suitable for industrial use.
Recommended
Automotive Seat Adjustment
The L9975-TR can be used to drive the DC motors for seat position adjustment in vehicles. Each half-bridge can control one motor, allowing independent adjustment of seat position, recline, and lumbar support. The SPI interface enables precise control and memory functions. The wide supply range and automotive qualification make it suitable for this application. The low quiescent current is beneficial for reducing battery drain when the vehicle is off. The device's protection features prevent damage from motor stalls or short circuits. In a typical application, the L9975-TR is controlled by a seat control module, and each half-bridge drives a motor with PWM for smooth movement. The diagnostic output can detect if a seat is obstructed, allowing the system to stop and report an error.
Recommended
Robotics and Automation
The L9975-TR is used in robotics and automation for driving small DC motors and actuators. Its four half-bridges can control multiple motors, and the SPI interface allows integration with microcontrollers. The wide supply range supports various battery voltages. The device's protection features ensure reliable operation in dynamic environments. The low RDS(on) and PWM capability enable efficient and precise motor control. In a typical application, the L9975-TR is connected to a microcontroller via SPI, and each half-bridge drives a motor with PWM for speed and direction control. The diagnostic output provides real-time status, enabling fault detection and recovery. The compact SO-28 package is suitable for space-constrained designs.
Recommended
Recommended Products Summary
Engineering reference data for L9975-TR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9975 | TLE9201SG | MC33887 |
|---|---|---|---|---|
| Package | SO-28 | SO-28 | SO-28 | SO-28 |
| Brand | STMicroelectronics | STMicroelectronics | Infineon | NXP Semiconductors |
| Number of Half-Bridges | 4 | 4 | 4 | 4 |
| Supply Voltage Range | 5.5 V to 36 V | 5.5 V to 36 V | 5.5 V to 28 V | 5.0 V to 28 V |
| Output Current per Channel | 1.2 A | 1.2 A | 1.0 A | 1.0 A |
| RDS(on) per Switch | 0.5 Ξ© | 0.5 Ξ© | 0.6 Ξ© | 0.55 Ξ© |
| Control Interface | SPI | SPI | SPI | Parallel |
| AEC-Q100 Qualification | Grade 1 | Grade 1 | Grade 0 | Grade 1 |
Key Differentiators
- Higher output current per channel (1.2 A) compared to cross-brand alternatives (vs TLE9201SG)
- Wider supply voltage range (5.5V-36V) vs TLE9201SG (5.5V-28V) (vs TLE9201SG)
- SPI interface with diagnostics vs MC33887 parallel interface (vs MC33887)
Design Notes
The L9975-TR in SO-28 package with exposed pad requires proper thermal management. Ensure the exposed pad is soldered to a large copper area on the PCB to dissipate heat. For continuous operation at 1.2 A per channel, calculate power dissipation using P = I^2 * RDS(on) * number of channels. At 1.2 A and 0.5 Ξ©, each channel dissipates 0.72 W, so four channels could dissipate 2.88 W. Use thermal vias to connect the pad to inner layers for improved heat spreading.
Place decoupling capacitors close to the VS pin to filter supply noise. Use a 100 nF ceramic capacitor and a 10 Β΅F electrolytic capacitor. For the SPI lines, add series resistors (e.g., 22 Ξ©) to reduce ringing and improve signal integrity. Keep SPI traces short and avoid routing near high-current outputs to prevent coupling.
Do not exceed the absolute maximum supply voltage of 40 V. Ensure the SPI interface is properly initialized before enabling outputs. When driving inductive loads, add freewheeling diodes across each output to prevent voltage spikes. The diagnostic output is open-drain; use a pull-up resistor to VCC. Verify the SPI protocol timing matches the datasheet to avoid communication errors.
Compliance Information
AEC-Q100 Grade 1 qualified per STMicroelectronics. RoHS compliant. REACH compliance assumed based on ST policy.
