Overview
The L9953 and L9953XP are microcontroller-driven multifunctional door actuator drivers designed for automotive applications. These drivers are capable of controlling up to three DC motors and three grounded resistive loads using five half bridges and three highside drivers. The integrated standard serial peripheral interface (SPI) manages all operation modes, including forward, reverse, brake, and high impedance. All diagnostic information is accessible via the SPI interface.
Key Specifications
| Parameter | Description |
|---|---|
| Package | PowerSSO-36 |
| Full Bridge Load | 6A (Ron = 150mΩ) |
| Half Bridges Load | Three half bridges for 1.5A load (Ron = 800mΩ) |
| Highside Drivers | One highside driver for 6A load (Ron = 100mΩ), Two highside drivers for 1.5A load (Ron = 800mΩ) |
| Standby Current | Very low current consumption in stand-by mode (IS < 6µA typ; Tj ≤ 85 °C) |
| Protection Features | All outputs short circuit protected, Over temperature protected, Open load diagnostic for all outputs, Overload diagnostic for all outputs |
| Control Interface | Standard serial peripheral interface (SPI) |
| Operating Temperature | -40°C to 150°C |
Key Features
- Programmable softstart function to drive loads with higher inrush currents
- PWM control of all outputs
- Charge pump output for reverse polarity protection
- Current monitor output for highside OUT1, OUT4, OUT5, and OUT8
- Separated half bridges for door lock motor
- All outputs over temperature protected and short circuit protected
- Open load diagnostic and overload diagnostic for all outputs
- Very low current consumption in stand-by mode
Applications
The L9953 and L9953XP are designed for various automotive applications, including:
- Door actuator driver with bridges for door lock, mirror axis control, and mirror fold
- Highside driver for mirror defroster and two 10W-light bulbs
Q & A
- What is the primary function of the L9953XP?
The L9953XP is a microcontroller-driven multifunctional door actuator driver for automotive applications, capable of controlling up to three DC motors and three grounded resistive loads.
- What types of loads can the L9953XP drive?
The L9953XP can drive up to three DC motors and three grounded resistive loads using five half bridges and three highside drivers.
- What is the maximum current rating for the full bridge of the L9953XP?
The full bridge of the L9953XP has a maximum current rating of 6A with an on-resistance (Ron) of 150mΩ.
- What protection features are included in the L9953XP?
The L9953XP includes protection features such as short circuit protection, over temperature protection, open load diagnostic, and overload diagnostic for all outputs.
- How does the L9953XP manage its operation modes?
The L9953XP manages its operation modes (forward, reverse, brake, and high impedance) through the integrated standard serial peripheral interface (SPI).
- What is the standby current consumption of the L9953XP?
The L9953XP has a very low current consumption in stand-by mode, typically less than 6µA at Tj ≤ 85 °C.
- What is the purpose of the charge pump output in the L9953XP?
The charge pump output is used for reverse polarity protection.
- Can the L9953XP handle loads with high inrush currents?
- What is the operating temperature range of the L9953XP?
The operating temperature range of the L9953XP is -40°C to 150°C.
- How does the L9953XP monitor current?
The L9953XP provides a current monitor output for highside drivers OUT1, OUT4, OUT5, and OUT8, which sources a current image at a fixed ratio of the instantaneous current.
