Lumissil IS32FL3105A/B/C/D: Automotive 2x18 Matrix LED Driver

The IS32FL3105 is an 18×2 matrix LED driver supporting up to 12 RGB nodes, with up to 60mA per LED channel, 16-bit PWM dithering, and 6-bit DC current scaling for calibrated dimming and color control. The device communicates through LumiBus™ using either integrated CAN-PHY variants or UART variants for use with an external CAN transceiver, and supports direct address pin assignment for up to 25 devices or LAA addressing for up to 254 devices. Integrated PWM spread spectrum, controlled output transitions, and 180-degree odd/even channel phase delay help reduce switching-related EMI and input-current ripple, while FBO/DCFB control enables automatic adjustment of an external DC/DC converter’s VLED output to minimize LED driver headroom and improve system efficiency.

Key features

• VLED operates with a power supply range of 3.0V to 12V for each LED channel
• VS power supply voltage ranges from 5V to 28V
• CAN interface (IS32FL3105A/B) and UART interface (IS32FL3105C/D) with Lumissil’s proprietary LumiBus™ protocol support communication from 100kHz to 2MHz
• Direct address for IS32FL3105A/C, can support up to 25 devices
• LAA (Location Address Assignment) for random IS32FL3105B/D register access without address pins, up to 254 devices can be addressed
• Support 12 LED RGB color dots (2×18 channel). Support on die OTP for fail safe mode
• Provide constant luminance over wide temperature range by temperature compensation algorithm in PWM space for each individual channel
• Support spread spectrum on PWM clock to reduce EMI from driver
• Built-in standard CAN PHY (physical layer)
• Cross fading accelerator
• DC feedback for automatic DC/DC VLED adjustment to optimize system power supply (DCFB)
• Fault detection and protection
• Functional Safety Ready (ASIL-B)
• AEC-Q100 Qualified with Temperature Grade 1:-40°C to 125°C
• WFQFN-32 (5×5mm) package

Applications

• Ambient LED Light
• Automotive rear light
• Automotive clusters
• Automotive interiors