Overview
The L9950 and L9950XP, produced by STMicroelectronics, are microcontroller-driven multifunctional door actuator drivers designed specifically for automotive applications. These drivers are capable of controlling up to five DC motors and five grounded resistive loads, utilizing six half bridges and five highside drivers. The integrated standard serial peripheral interface (SPI) enables control over all operation modes, including forward, reverse, brake, and high impedance. Diagnostic information is also accessible via the SPI interface.
Key Specifications
| Parameter | Description |
|---|---|
| Package | PowerSO-36, PowerSSO-36 |
| Full Bridge Load | 6A (Ron = 150 mΩ) |
| Half Bridges Load | Two for 3A (Ron = 300 mΩ), Two for 1.5A (Ron = 800 mΩ) |
| Highside Drivers Load | One for 6A (Ron = 100 mΩ), Four for 1.5A (Ron = 800 mΩ) |
| Standby Mode Current Consumption | IS < 6 μA typ; ICC < 25 μA typ; Tj ≤ 85 °C |
| Protection Features | All outputs short circuit protected, over temperature protected, open load diagnostic, overload diagnostic |
| Operating Temperature | (min) -40 °C, (max) 150 °C |
| RoHS Compliance | Ecopack2 |
Key Features
- One full bridge for 6A load (Ron = 150 mΩ)
- Two half bridges for 3A load (Ron = 300 mΩ) and two for 1.5A load (Ron = 800 mΩ)
- One highside driver for 6A load (Ron = 100 mΩ) and four for 1.5A load (Ron = 800 mΩ)
- Programmable softstart function to drive loads with higher inrush currents
- Very low current consumption in standby mode
- All outputs short circuit protected, over temperature protected, open load diagnostic, and overload diagnostic
- 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
Applications
The L9950 and L9950XP are designed for various automotive applications, including:
- Door actuator driver with bridges for door lock and safe lock
- Mirror axis control, mirror fold, and mirror defroster
- Highside driver for mirror defroster and four 10W light bulbs
Q & A
- What is the primary function of the L9950 and L9950XP?
The L9950 and L9950XP are microcontroller-driven multifunctional door actuator drivers for automotive applications.
- How many DC motors and resistive loads can the L9950 control?
Up to five DC motors and five grounded resistive loads.
- What types of protection features are included in the L9950?
All outputs are short circuit protected, over temperature protected, with open load diagnostic and overload diagnostic.
- What is the current consumption in standby mode?
IS < 6 μA typ; ICC < 25 μA typ; Tj ≤ 85 °C.
- Does the L9950 support PWM control?
- What is the purpose of the charge pump output?
The charge pump output is for reverse polarity protection.
- How is the L9950 controlled?
The L9950 is controlled via the integrated standard serial peripheral interface (SPI).
- What are some common applications of the L9950?
Door actuator driver, mirror axis control, mirror fold, mirror defroster, and highside driver for light bulbs.
- What are the package options for the L9950?
PowerSO-36 and PowerSSO-36.
- Is the L9950 RoHS compliant?
