AL58818Q

Multi-Channel Linear RGB Drivers Webinar

Description

The AL58818Q is comprised of 18 programmable LED current channels each with internal 12-bit PWM and 6-bit global current dimming for color and brightness control through I2C or SPI digital interface. AL58818Q is ideal for up to 6 RGB LED lighting modules with 3 programmable banks (A, B, C) for software control of each color or 18 Single Color LEDs with independent dimming for each channel. An external resistor can set up the global output current of all 18 channels. Each channel current can digitally be configured up to the thermal limitation of the package.

Features of the AL58818Q are controlled via I2C/SPI digital interface. Using a dedicated pin INT_SEL to select either I2C or SPI serial interface protocols. The AL58818Q has an internal 30kHz, 12-bit PWM generator for each channel, as well as channel/module independent color mixing and brightness control registers to enable PWM phase shift staggered delay out to achieve vivid LED effects without audible noise and meet EMC CISPR 25 Class 5 requirements. Users can benefit from the device’s ultra-low shutdown IQ Power Saving Mode and easy software programming.

The device operates over -40°C to +125°C ambient temperature range. The AL58818Q is available in W-QFN5050-40/SWP (Type A1) MSL level 1 package.

Feature(s)

• AEC-Q100 (Grade 1) Qualification
• Input Voltage 2.7V to 5.5V
• 18 Precision LED Current Sinks
  • OUT Pins Voltage max 5.5V
  • 70mA per Channel Current
  • 12-Bit PWM Register with 30kHz Internal PWM Generator
  • PWM Phase Shifting
  • 6-Bit Global Current Dimming
  • Independent Color-Mixing Registers
  • Independent Brightness Control Registers
  • Logarithmic or Linear-Scale Brightness Control
  • Three Programmable Banks (A, B, C)
  • Low-Dropout VSAT 200mV Typical at 70mA
• Hardware-Selectable I2C or SPI Digital Interface
  • Support 400kHz I2C Interface and 4MHz SPI
• Diagnosis and Protections
  • Open-Drain Fault Indication Pin and Registers
  • Individual Fault Mask Registers for Each Channel
  • Overtemperature Protection (OTP) with Pre-OTP Warning
  • LED Open/Short, Undervoltage
• Ultra-Low Quiescent Shutdown 1μA:
  • Power-Saving Mode: 15μA (max)
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• The AL58818Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF16949 certified facilities. https://www.diodes.com/quality/product-definitions/

Application(s)

• Automotive interior and exterior lighting
• Infotainment displays
• Automotive status indicator lights
• Touch panels and LCD displays