Summary of STMICROELECTRONICS L9026 MULTI-CHANNEL RELAY DRIVER
STMicroelectronics L9026 is an AEC-Q100 qualified multi-channel relay driver for automotive LED, lamp, and relay loads. It integrates two high-side and six configurable high/low-side drivers, supports SPI and parallel control, offers advanced diagnostics (short to GND, open load, overcurrent, over-temperature), limp-home mode, cranking operation down to 3.0V, reverse-battery protection, LED and Bulb Inrush modes, and two internal PWM generators. Available in HTSSOP24 and VFQFPN32 packages, it is ISO26262 ASIL-B ready and RoHS compliant.
Parts used in the L9026 Multi-Channel Relay Driver project:
- STMicroelectronics L9026 multi-channel relay driver IC
- HTSSOP24 package (option)
- VFQFPN32 package (option)
- Microcontroller compatible with 3.3V or 5.0V digital supply
- SPI interface wiring for 16-bit SPI or daisy-chained SPI
- Parallel input connections (two dedicated inputs)
- VBATT supply with reverse-battery protection considerations
- External relays, LEDs, or lamps as target loads
- PCB implementing NRES and DIS pin connections for reset and disable functions
STMicroelectronics L9026 Multi-Channel Relay Driver is optimized for automotive LED and relay applications and is compatible with resistive, inductive and capacitive loads. The L9026 integrates two High-Side drivers and six configurable High-Side/Low-Side drivers and can be driven by SPI or by two dedicated parallel inputs. The device offers advanced diagnostic and protection functionalities such as short to GND, open load, overcurrent, and over-temperature detections. Limp Home functionality is also featured, which allows using two selected drivers in particular faulty conditions, such as SPI fault, micro fault, or supply UV. Daisy chaining is possible even with 8-bit SPI devices.
The AEC-Q100 qualified STMicroelectronics L9026 Relay Driver is available in HTSSOP24 and VFQFPN32 package options. On the VFQFPN package 2 additional pins are available for safety reasons. The NRES pin is used to reset internal registers to their default values and the DIS pin is used to disable all channels.
Features
- AEC-Q100 qualified
- 6x configurable High-Side/Low-Side drivers
- 2x High-Side drivers
- 2x parallel input pins with Input Mapping functionality
- Cranking capability down to VBATT = 3.0V
- Digital supply voltage compatible with 3.3V and 5.0V microcontrollers
- Reverse battery protection on VBATT and on drain pins without external components
- LED mode
- Bulb Inrush Mode (BIM) to drive lamps and electronic loads
- 2x internal PWM generators for microcontroller offload
- Very low quiescent current with usage of IDLE pin
- Limp Home mode with usage of IDLE and IN pins
- Safety features
- Temperature Sensor and Monitoring
- Serial communications using address feedback, 1 parity bit, frame counter, and short frame detection
- 16-bit Serial Peripheral Interface (SPI) for control and diagnosis
- Daisy Chain capable SPI, also compatible with 8-bit SPI devices
- HTSSOP24 and VFQFPN32 package options
- Fully ISO26262 compliant, ASIL-B systems ready
- Green Product (RoHS compliant)
Read more: STMICROELECTRONICS L9026 MULTI-CHANNEL RELAY DRIVER
- What control interfaces does the L9026 support?
The L9026 supports a 16-bit SPI interface (daisy chain capable) and two dedicated parallel input pins. - Can the L9026 drive both high-side and low-side loads?
Yes; it integrates two High-Side drivers and six configurable High-Side/Low-Side drivers. - Does the L9026 provide diagnostic features?
Yes; it offers diagnostics including short to GND, open load, overcurrent, and over-temperature detections. - Is the L9026 suitable for automotive cranking conditions?
Yes; it has cranking capability down to VBATT = 3.0V. - What safety and functional modes does the L9026 offer?
It features limp home mode, LED mode, Bulb Inrush Mode, temperature monitoring, and safety functions with NRES and DIS pins. - Which package options are available for the L9026?
The device is available in HTSSOP24 and VFQFPN32 package options. - Is the L9026 compliant with functional safety standards?
Yes; it is fully ISO26262 compliant and ASIL-B systems ready. - Can the L9026 be used with 3.3V microcontrollers?
Yes; its digital supply voltage is compatible with 3.3V and 5.0V microcontrollers. - Does the VFQFPN package provide additional safety pins?
Yes; the VFQFPN package exposes two additional pins used for safety: NRES and DIS.
