Overview
The L9950TR, produced by STMicroelectronics, is a microcontroller-driven multifunctional door actuator driver designed specifically for automotive applications. This device is capable of driving up to five DC motors and five grounded resistive loads using six half bridges and five highside drivers. It integrates a standard serial peripheral interface (SPI) for controlling all operation modes, including forward, reverse, brake, and high impedance. The L9950TR is part of the L9950 and L9950XP family, offering advanced features for automotive door actuation and other related functions.
Key Specifications
| Parameter | Description |
|---|---|
| Package | PowerSO 36 |
| Grade | Automotive |
| RoHS Compliance Grade | Ecopack2 |
| Operating Temperature (°C) | -40 to 150 |
| Full Bridge Load | 6A (Ron=150 mΩ) |
| Half Bridges Load | 3A (Ron=300 mΩ) and 1.5A (Ron=800 mΩ) |
| Highside Drivers Load | 6A (Ron=100 mΩ) and 1.5A (Ron=800 mΩ) |
| Standby Current | IS < 6 μA typ; ICC <25 μA typ; Tj ≤ 85 °C |
| Protection Features | Short circuit, over temperature, open load, and overload protection |
Key Features
- Programmable softstart function to drive loads with higher inrush currents
- Very low current consumption in standby mode
- Current monitor output for 300 mΩ, 150 mΩ, and 100 mΩ highside drivers
- PWM control of all outputs
- Charge pump output for reverse polarity protection
- Separated half bridges for door lock motor
- Open load and overload diagnostic for all outputs
Applications
The L9950TR is designed for various automotive applications, including:
- Door actuator driver with bridges for door lock and safe lock
- Mirror axis control
- Mirror fold
- Highside driver for mirror defroster
- Driving up to four 10W-light bulbs
Q & A
- What is the primary function of the L9950TR?
The L9950TR is a microcontroller-driven multifunctional door actuator driver for automotive applications. - How many DC motors and resistive loads can the L9950TR drive?
It can drive up to five DC motors and five grounded resistive loads. - What is the package type of the L9950TR?
The package type is PowerSO 36. - What are the key protection features of the L9950TR?
The device features short circuit, over temperature, open load, and overload protection. - How does the L9950TR manage high inrush currents?
It has a programmable softstart function to drive loads with higher inrush currents. - What is the operating temperature range of the L9950TR?
The operating temperature range is -40 to 150 °C. - How is the L9950TR controlled?
It is controlled via a standard serial peripheral interface (SPI). - What are some of the applications of the L9950TR?
Applications include door actuator driver, mirror axis control, mirror fold, and driving light bulbs. - Does the L9950TR have current monitoring capabilities?
Yes, it has current monitor output for 300 mΩ, 150 mΩ, and 100 mΩ highside drivers. - Is the L9950TR RoHS compliant?
Yes, it is RoHS compliant with an Ecopack2 grade.
