Lumissil IS32LT3183A LIN RGB LED Driver
Lumissil IS32LT3183A LIN RGB LED Driver is a single-chip RGB driver with a LIN interface suitable for automotive ambient color applications. This LIN RGB+W LED controller consists of a LIN transceiver, a LIN protocol engine, four configurable high voltage GPIO outputs, and a programmable MCU. The LIN master can send RGB color, intensity, and control instructions over the LIN Bus and receives back status and error information at 19.2kbps data rates. The IS32LT3183A driver offers strong Electro Static Discharge (ESD) performance and can withstand high voltages on the LIN bus. This LIN Bus signal is designed to minimize Electro Magnetic Emissions (EME). The IS32LT3183A driver also supports LIN Slave Node Position Detection (SNPD) using Bus Shunt Method (BSM), which integrates key-functional features for developing compact multicolor LED LIN nodes. The IS32LT3183A driver is used in LIN RGB LED ambient lighting, dome LED lighting, dashboard lighting, and LIN to SPI or LIN to I2C bridge.
The integrated low-drop voltage regulator supports internal circuit operation and can sink a constant current of 60mA to each of the RGBW LEDs. The IS32LT3183A driver supports a sleep mode to power down with wake-up capability via the LIN bus to minimize current consumption. The integrated MCU is an 8051-based CPU core with 32kB embedded flash, wherein each byte is protected by an Error Correction Code (ECC). This brings the highest reliability level of code storage for the challenging environment of automobile applications.
Features
- 5.5V~18V continuous wide supply voltage with maximum input voltage up to 40V
- 60µA (maximum) sleep mode supply current with wake-up via LIN bus capability
- 4 independent LED current sinks:
- Up to 60mA software programmable LED current
- Reconfigurable as GPIO, SPI master interface, or I2C master interface
- Integrated MCU for LIN protocol handling and LIN message decoding:
- 1-T enhance 8051 core
- 16MHz (±5%) internal OSC
- 32kB Flash and 2kB SRAM
- Each nibble of code is protected by ECC for double-bit detection and single-bit correction
- LIN Interface
- SPI/I2C master interface
- GPIO and external interrupt/wake-up
- 12-bit SAR ADC with conversion time up to 10µs
- On-chip temperature sensor
- Math co-processor for 16-bit MUL and 32-bit DIV operations
- LIN interface:
- Up to 19.2kbps baud rate
- Integrated LIN transceiver
- Internal LIN slave termination resistor
- Compliant with LIN 2.2A
- Support SNPD (BSM) auto addressing
- Protections and ESD:
- 40V load dump protected
- ±8kV for GPIO
- Temperature compensation to protect LED
- LED drivers:
- LED color calibration via matrix calculation
- Flash storage for calibration values
- Intensity control (linear or logarithmic)
- Dimming and color transition function with programmable transition time
- Up to 16-bit LED color range
- PWM with spread spectrum to optimize EMI
- LED temperature compensation
- Diagnostics:
- Open/Short LED detection
- High-temperature warning and shutdown
- LIN retry mode on error detection
- SOP-8-EP package
- AEC-Q100 qualified
- RoHS and Halogen-free compliance
- TSCA compliance
Applications
- LIN RGB LED ambient lighting
- Dome LED lighting
- Dashboard lighting
- LIN to SPI or LIN to I2C bridge
- General purpose MCU for LIN node slave operation
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