L9969 - Automotive H-Bridge Driver | STMicroelectronics | Motor Control
MPN: L9969 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for L9969 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:
L9969S
β Drop-Inπ Reference alternative (not in catalog)
L9969U
β Drop-Inπ Reference alternative (not in catalog)
L9969T
β Drop-Inπ Reference alternative (not in catalog)
L9969T-TR
β Drop-Inπ Reference alternative (not in catalog)
L9969 Maximum Ratings & Electrical Characteristics
| Number of H-Bridges | 1 (L9969S/U) or 2 (L9969T) |
| Package | PowerSSO-24 (single) / PowerSSO-36 (dual) |
| Supply Voltage Range | [DATA_NEEDED: Supply voltage range] |
| Output Current (per bridge) | [DATA_NEEDED: Output current rating] |
| Output Current Direction Control | Yes |
| Load Types | Resistive and inductive |
| Operating Temperature Range | -40Β°C to +125Β°C |
| AEC-Q100 Qualification | Yes |
| Protection Features | Overcurrent, overtemperature, undervoltage |
| Diagnostic Features | Open-load detection, short-circuit protection |
| Input Interface | Independent input driving commands |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Automotive Grade | Yes |
| Parallel Operation | Supported (dual H-bridge can work in parallel) |
L9969 Pin Configuration
| Pin 1 | OUT1 β H-bridge output 1 |
| Pin 2 | OUT2 β H-bridge output 2 |
| Pin 3 | VS β Power supply voltage |
| Pin 4 | GND β Ground |
| Pin 5 | IN1 β Input control for half-bridge 1 |
| Pin 6 | IN2 β Input control for half-bridge 2 |
| Pin 7 | EN β Enable pin |
| Pin 8 | DIAG β Diagnostic output |
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
L9969 is suitable for 6 applications: Throttle Control Actuator, HVAC Flap Control, Mirror Adjustment, Seat Positioning, Industrial Actuator Control, 48V Mild-Hybrid Systems.
Throttle Control Actuator
The L9969 provides precise bidirectional control of DC motors used in electronic throttle control systems. Its robust protection features and automotive qualification ensure reliable operation in engine management applications. The H-bridge configuration allows accurate positioning of the throttle plate, with the device's diagnostic features enabling early detection of faults. The wide operating temperature range of -40Β°C to +125Β°C ensures performance in extreme engine bay conditions. The device's output current direction control allows smooth transitions between opening and closing the throttle, while the supervising functions monitor for overcurrent and overtemperature conditions. In a typical throttle control system, the L9969 is placed between the ECU and the throttle motor, with the input commands from the ECU determining the motor direction and speed. The device's protection features prevent damage to the motor and driver in case of a stalled rotor or short circuit. The L9969's automotive-grade design ensures long-term reliability in this safety-critical application.
Recommended
HVAC Flap Control
The L9969 is ideal for controlling the DC motors that adjust HVAC flaps in automotive climate control systems. Its dual H-bridge configuration (L9969T) allows independent control of two flaps, such as the temperature and airflow direction flaps. The device's low quiescent current and robust protection features make it suitable for always-on applications in the vehicle cabin. The H-bridge topology enables bidirectional motor control, allowing precise positioning of the flaps for optimal cabin comfort. The device's diagnostic features, including open-load detection, help identify faulty flap motors or wiring issues. In a typical HVAC system, the L9969 receives commands from the climate control unit and drives the flap motors accordingly. The device's automotive qualification ensures reliable operation over the vehicle's lifetime, even with frequent actuation cycles. The PowerSSO-36 package allows for a compact PCB layout, saving space in the HVAC control module.
Recommended
Mirror Adjustment
The L9969 provides reliable control of the DC motors used in power mirror adjustment systems. Its single H-bridge configuration (L9969S/U) is sufficient for driving one mirror motor, while the dual H-bridge (L9969T) can control both the horizontal and vertical adjustment motors. The device's low on-resistance and high current capability ensure efficient motor operation. The H-bridge topology allows bidirectional control, enabling the mirror to be adjusted in both directions. The device's protection features, including overcurrent and short-circuit protection, safeguard the motor and driver in case of a stalled mirror mechanism. In a typical mirror adjustment system, the L9969 receives commands from the mirror control switch and drives the motors accordingly. The device's automotive qualification ensures reliable operation in all weather conditions, from extreme cold to hot summer temperatures. The compact PowerSSO package allows for integration into the mirror control module.
Recommended
Seat Positioning
The L9969 is well-suited for controlling the multiple DC motors used in power seat adjustment systems. Its dual H-bridge configuration (L9969T) allows control of two motors, such as the seat forward/backward and recline motors. The device's high current capability and robust protection features ensure reliable operation under heavy loads. The H-bridge topology enables bidirectional motor control, allowing precise seat positioning. The device's diagnostic features, including open-load detection, help identify faulty seat motors or wiring issues. In a typical seat adjustment system, the L9969 receives commands from the seat control switch and drives the motors accordingly. The device's automotive qualification ensures reliable operation over the vehicle's lifetime, even with frequent adjustments. The PowerSSO-36 package allows for a compact PCB layout in the seat control module.
Recommended
Industrial Actuator Control
The L9969 can be used in industrial actuator control applications, such as valve positioning and conveyor belt control. Its robust design and wide operating temperature range make it suitable for harsh industrial environments. The device's dual H-bridge configuration allows control of two actuators or one actuator with higher current capability. The H-bridge topology enables bidirectional control, allowing precise positioning of valves or other mechanical components. The device's protection features, including overcurrent and overtemperature protection, ensure reliable operation in demanding industrial applications. In a typical industrial actuator system, the L9969 receives commands from a PLC or microcontroller and drives the actuator motor accordingly. The device's automotive-grade design ensures long-term reliability, even in continuous operation. The PowerSSO package allows for easy integration into industrial control boards.
Recommended
48V Mild-Hybrid Systems
The L9969 is suitable for controlling actuators in 48V mild-hybrid systems, such as electric superchargers and active suspension components. Its high current capability and robust protection features make it ideal for these high-power applications. The device's dual H-bridge configuration allows control of two actuators or one actuator with higher current capability. The H-bridge topology enables bidirectional control, allowing precise control of the actuator's position or speed. The device's diagnostic features, including short-circuit protection, ensure safe operation in safety-critical hybrid systems. In a typical 48V mild-hybrid system, the L9969 receives commands from the hybrid control unit and drives the actuator motor accordingly. The device's automotive qualification ensures reliable operation in the demanding environment of a hybrid vehicle. The PowerSSO-36 package allows for a compact PCB layout in the hybrid control module.
Recommended
Recommended Products Summary
Engineering reference data for L9969 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9969S | L9969U | L9969T |
|---|---|---|---|---|
| Package | PowerSSO-24 / PowerSSO-36 | PowerSSO-24 | PowerSSO-24 | PowerSSO-36 |
| Number of H-Bridges | 1 or 2 | 1 | 1 | 2 |
| Operating Temperature | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C | -40Β°C to +125Β°C |
| AEC-Q100 | Yes | Yes | Yes | Yes |
| Protection Features | Overcurrent, overtemperature, undervoltage | Overcurrent, overtemperature, undervoltage | Overcurrent, overtemperature, undervoltage | Overcurrent, overtemperature, undervoltage |
| Diagnostic Features | Open-load detection, short-circuit protection | Open-load detection, short-circuit protection | Open-load detection, short-circuit protection | Open-load detection, short-circuit protection |
| Parallel Operation | Supported (dual H-bridge) | Not applicable | Not applicable | Supported |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
Key Differentiators
- Dual H-bridge capability in PowerSSO-36 (vs L9969S (single H-bridge))
- Automotive AEC-Q100 qualification (vs Non-automotive H-bridge drivers)
- Comprehensive protection and diagnostic features (vs Basic H-bridge drivers)
Design Notes
Ensure adequate bulk capacitance on the VS pin to handle motor inrush currents. A 100uF electrolytic capacitor in parallel with a 0.1uF ceramic capacitor is recommended. The power supply must be able to handle the peak motor current without significant voltage droop.
The PowerSSO package has a thermal pad that must be soldered to a copper pour for effective heat dissipation. Use multiple vias to connect the thermal pad to the ground plane. For high-current applications, consider adding a heatsink or increasing the copper area.
Keep the motor output traces short and wide to minimize parasitic inductance and resistance. Place the L9969 close to the motor connector. Use star grounding to avoid ground loops between the power stage and control logic.
Compliance Information
RoHS compliant per STMicroelectronics product page. AEC-Q100 qualified for automotive applications.
