Overview
The L9953LXP from STMicroelectronics is a microcontroller-driven multifunctional door actuator driver specifically designed for automotive applications. This device is capable of driving up to three DC motors and three grounded resistive loads using five half bridges and three high-side drivers. It integrates a standard serial peripheral interface (SPI) for controlling all operation modes, including forward, reverse, brake, and high impedance. The L9953LXP is AEC-Q100 qualified, ensuring its reliability and performance in harsh automotive environments.
Key Specifications
| Parameter | Description |
|---|---|
| Package | PowerSSO-36 |
| Operating Voltage Range | 4.5V to 36V |
| Half Bridges | Three half bridges for 0.75A loads (RDSon=1600mΩ) |
| High-Side Drivers | Two configurable high-side drivers for up to 1.5A load (RDSon=500mΩ) or 0.35A load (Ron=1800mΩ), and one high-side driver for 6A load (Ron=100mΩ) |
| Full Bridge | One full bridge for 6A load (Ron=150mΩ) |
| Current Consumption in Standby | Very low current consumption in standby mode (IS < 6µA typ; Tj ≤ 85 °C) |
| Protection Features | All outputs short circuit protected, over temperature protected, and overload diagnostic for all outputs |
| Diagnostic Features | Open-load diagnostic, over-current detection, and current monitor output for high-side drivers |
| SPI Interface | Integrated standard serial peripheral interface (SPI) for configuration and diagnostics |
| PWM Control | PWM control of all outputs |
| Charge Pump Output | Charge pump output for reverse polarity protection |
Key Features
- Eight channels capable of driving resistive, inductive, or capacitive loads up to 600 mA each
- Programmable soft start function to drive loads with higher inrush currents
- Short-circuit and over-temperature protection
- Under-voltage lockout and over-voltage protection
- Diagnostic functions including open-load detection, over-current detection, and over-temperature detection
- SPI (Serial Peripheral Interface) for configuration and diagnostics
- PWM control of all outputs
- Charge pump output for reverse polarity protection
- Separated half bridges for door lock motor
- Very low current consumption in standby mode (IS < 6µA typ; Tj ≤ 85 °C)
Applications
The L9953LXP is commonly used in various automotive applications, including:
- Electric power steering systems
- Electronic throttle control
- Transmission control units
- Door actuator control (door lock, mirror axis control, mirror fold)
- Mirror defroster and lighting control (up to two 10W-light bulbs and/or LEDs)
Q & A
- What is the primary function of the L9953LXP?
The L9953LXP is a microcontroller-driven multifunctional door actuator driver for automotive applications, capable of driving up to three DC motors and three grounded resistive loads.
- What is the operating voltage range of the L9953LXP?
The operating voltage range of the L9953LXP is from 4.5V to 36V.
- What protection features does the L9953LXP offer?
The L9953LXP offers short-circuit protection, over-temperature protection, and overload diagnostic for all outputs.
- How does the L9953LXP handle diagnostic functions?
The L9953LXP provides diagnostic functions including open-load detection, over-current detection, and over-temperature detection, all accessible via the SPI interface.
- What is the purpose of the charge pump output in the L9953LXP?
The charge pump output is provided for reverse polarity protection.
- Can the L9953LXP be controlled using PWM signals?
Yes, the L9953LXP supports PWM control of all outputs.
- What is the current consumption in standby mode for the L9953LXP?
The current consumption in standby mode is very low, typically less than 6µA at Tj ≤ 85 °C.
- Is the L9953LXP AEC-Q100 qualified?
Yes, the L9953LXP is AEC-Q100 qualified for use in automotive applications.
- What package type does the L9953LXP come in?
The L9953LXP comes in a PowerSSO-36 package type.
- What are some common applications of the L9953LXP in the automotive sector?
The L9953LXP is used in electric power steering systems, electronic throttle control, transmission control units, and door actuator control among others.
