STMicroelectronics L9800 8-Channel LS Driver
STMicroelectronics L9800 8-Channel LS Driver is designed for automotive applications (LEDs and relays) and is compatible with resistive, inductive, and capacitive loads. The device offers advanced diagnostic and protection functionalities such as open load, overcurrent and overtemperature detections, and short to GND. SPI or dedicated parallel inputs can drive the eight output channels. Limp-home functionality is present. Daisy chain available (no constraint on SPI number of bits of devices in the chain). The device can guarantee a cranking scenario down to VBATT = 3V and ensures a very low-quiescent current under RESET.
The STMicroelectronics L9800 is an 8-channel low-side power switch in a TFQFN24 4mm x 4mm x 0.9mm package. It is designed to control relays and LEDs in automotive and industrial applications. A serial peripheral interface (SPI) controls and diagnoses the loads and the device. Two input pins (IN0 and IN1) are available for direct control and PWM, and the input pins are connected to two outputs by default (OUT2 and OUT3). The same input pins can control additional or different outputs if programmed by SPI.
Features
- AEC-Q100 qualified
- Full ISO26262 compliant, ASIL-B systems ready
- General
- Eight LS drivers
- 16-bit SPI interface for output control and diagnosis data communication
- Daisy chain compatible and available even with 8-bit SPI
- Two parallel input pins with input mapping functionality
- Cranking capability down to VBATT = 3V
- Digital supply voltage range compatible with 3.3V and 5V MCU
- Bulb inrush mode (BIM) to drive 2W lamps and electronic loads
- Two independent internal PWM generators for MCU offloads and to drive LEDs
- Very low quiescent current (with the usage of the IDLE pin)
- Limp-home mode (with the usage of IDLE and IN pins)
- Safety features
- Temperature sensor and monitoring
- Serial communications using address feedback, one parity bit, frame counter, and short frame detection
- Fail-safe activation via input pins
- Safe operation at low battery voltage (cranking)
- Protective functions
- Overcurrent latch off
- Lower supply voltage range for extended operation
- Electrostatic discharge (ESD) protection
- Reverse battery protection on VBATT without external components
- Short circuit battery protection
- Thermal shutdown latch off
- Diagnostic features
- Latched diagnostic information via SPI register
- Overcurrent and overtemperature detection at on-state
- Off-state diagnosis, able to detect and distinguish open load and short to GND conditions
Applications
- Low-side switches for 12V in automotive or industrial applications such as lighting, heating, motor driving, energy, and power distribution
- Specially designed for driving relays, LEDs, and motors
Block Diagram
Development Tool
STMicroelectronics STEVAL-L9800 Evaluation Board
Designed to evaluate the robust L9800 octal low-side driver IC.
Complete Your Design
STMicroelectronics Standard Products
A broad range of drop-in replacements for general-purpose analog ICs, discretes, and serial EEPROMs.
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Publicado: 2024-07-02
| Actualizado: 2025-07-15