Automotive-Grade Touch Ambient-Light Driver IC: IM90xxK

The IM90xxK is a high-performance automotive-grade touch ambient-light driver IC based on the Cortex-M0+ core, optimized for the stringent demands of automotive interior lighting and touch-switch applications. For interior lighting, the IM90xxK integrates four high-precision constant-current drivers, supports an RGBW color-mixing algorithm, and features built-in LIN auto-addressing to simplify multi-node design. It also integrates multi-channel touch-input detection, greatly shortening development time for ambient-light and reading-light applications, while its compact integrated package significantly reduces product size. Meanwhile, the proprietary capacitive-sensing module enables wide use in in-vehicle panels, door handles, kick sensors, and other touch applications.

Main Features

• AEC-Q100 Grade 1, operating temperature -40℃ to 125℃
• 32-bit Arm® Cortex®-M0+ core, 48 MHz
• 1 CAN FD, 2 UART/LIN, 2 SPI, 1 I2C, and more
• 128 KB on-chip flash (100k cycles, ECC); 16 KB SRAM with parity
• 9-channel 12-bit 1 Msps ADC, 4-channel 16-bit constant-current PWM driver
• 9-channel dedicated capacitive-touch (PTC) module with hardware touch support
• Compact QFN32 package

Highlights

• Up to 9 capacitive-touch channels with waterproofing and temperature-drift suppression

• RGBW color-mixing algorithm support
• LED temperature compensation support

• NIST SP800-90 true random-number generation meeting latest info-security requirements

• High-speed CAN FD communication

Applications

Specifications

• Compliant with AEC-Q100 Grade 1

• Power: 6 V ~ 40 V
• Ambient temperature: -40 ℃ ~ +125 ℃

• QFN32

• 32-bit Arm® Cortex®-M0+ core
• Configurable Nested Vectored Interrupt Controller (NVIC)
• CPU frequency 48 MHz
• SysTick

• Integrated PMC supports STOP and RUN modes
• GPIO edge-wakeup support
• STOP-mode current ≤ 40 µA at 25 ℃

• External high-speed clock (HSE): 8 MHz ~ 32 MHz
• Internal high-speed clock (HSI): 48 MHz
• Internal low-speed clock (LSI): 32 kHz

• PFlash up to 128 KB with ECC
• Software-emulated EEPROM for data storage
• RAM up to 16 KB with Hardware Parity

• Cyclic Redundancy Check module (CRC)
• Serial Wire Debug interface (SWD)
• 4-channel DMA
• HAU (Hardware Acceleration Unit) accelerates complex operations (division / square root / RMS / trigonometric functions, etc.)

• Up to 1 CAN FD module
• Up to 2 UART modules with DMA; all support software LIN
• Up to 1 I2C module with DMA
• Up to 2 SPI modules with DMA

• Unique chip identifier (UUID), TRNG/PRNG support
• Clock monitor
• Low-voltage reset (LVR)
• Independent-clock watchdog (WDG)

• Up to 17 GPIO pins with edge-interrupt support
• Non-Maskable Interrupt (NMI) support

• 1× 12-bit 1 Msps SAR ADC and DAC
• 1× peripheral touch controller (PTC)
• 1× LIN physical-layer interface with adaptive addressing
• 1× high-voltage LDO
• Built-in temperature sensor

• 1× 6-channel SPWM module
• 1× 4-channel IPWM module
• 2× 32-bit timers
• 1× 32-bit RTC

Product Models