IS32LT3138 LED Driver

Product Highlights > IS32LT3138 LED Driver

            IS32LT3138 LED Driver
                    Lumissil’s 18-channel current sink LED driver is ideal for dynamic automotive exterior light animation
    

Lumissil’s IS32LT3138 18-channel current sink LED driver allows up to 64 devices to be cascaded for a total of 1152 individually controlled channels. It is targeted at the automotive lighting market, utilizing hundreds of LEDs to achieve the vivid and bright animations found in welcome and rear lamps that span the entire width of a vehicle.

The IS32LT3138 supports a high-speed 1 MHz UART interface compatible with the CANFD physical layer. It integrates cyclical redundancy checks (CRC), a powerful error-detection and correction method for reliable communication between the MCU and other IS32LT3138 devices.

Features

UART communication interface
- Compatible with CANFD physical layer, 1 MHz maximum
- With CRC to ensure robust communication
- 64 addressable devices
- Fail-safe mode with watchdog timer
18 channels capable of 100 mA each
- ±4.5% at 100 mA bit-to-bit output current mismatch
- ±5% at 100 mA device-to-device output current accuracy
64 steps (6-bit) global current setting
Individual 128 steps (7-bit) DC adjustment to each channel
Combined for higher current capability with the same current accuracy
- Minimum headroom voltage of 0.5 V (max.) at 100 mA

Wide input voltage supply from 4.5 V to 16 V
Maximum output voltage 16 V
Individual PWM dimming to each channel
- 4096 steps (12-bit) PWM duty cycle setting
  - 7+5-bit at 24 kHz
  - 12-bit at 244 Hz
  - 8-bit at 24 kHz
- Phase delay minimizes inrush current (six groups)
Slew rate control and spread spectrum optimize EMI performance
DC binning support (ADJR pin)
Fault protection with reporting
AEC-Q100 qualification in progress
Operating temperature range: -40°C to +125°C
WFQFN-32 (5 mm × 5 mm) package
Halogen-free and RoHS and TSCA compliance

Applications

Animation rear lights
Animation tail lights

Animation daytime running lights
Animation welcome lights