AL58263Q

Description

The AL58263Q is an automotive AEC-Q100 grade 1 16-channel constant current LED driver with 16-bit grayscale Adaptive Pulse Density Modulation (APDM) PWM, supporting error diagnostics, power saving function and current gain control. This distinctive APDM technology abates the non-ideal IOUT distortion due to non-symmetric transient responses and enhances the refresh rate by separating efficiently the frame waveform.

The device operates over a 3V to 5.0V input voltage range, 15V output channel voltage, a fast 25MHz DCK input, and delivers up to 55mA of high accuracy current to each string of LED. Each channel average output current can be programmable independently via digital interface individually. All channels output current could be set by one external sensing resistor along with 6-bit global current control register.

The AL58263Q has built-in detection and diagnosis and LED open/short including error detection. Those errors results are stored in register for MCU to read out.

The AL58263Q is available in the Wettable Flank W-QFN4040-24/SWP (Type A1) package and specified over the -40°C to +125°C ambient temperature range.

Feature(s)

• AEC-Q100 Grade 1
• Input Voltage VDD: 3V to 5.0V
• Output Current Range
  • 2 to 55mA/5.0V
  • ±0.1% (typ) Output Current Regulation
• 16 Constant-Current Sink Output Channel
  • 16-Bit Grayscale Resolution
  • 6-Bit Global Current Control
  • 15V Rated Output Channels
  • ±1.5% (typ) LED Current Accuracy Between Channels
  • ±3% (typ) LED Current Accuracy Between Chips
  • Stagger Outputs Delay for EMI Reduction
  • Cascaded Capability (max 1,440 Devices)
• Detection and Diagnosis
  • Error Detection Includes LED Open, LED Short, Output Port Leakage, Output Short-to-GND, Output Short-to-Power and REXT Short-to-GND
  • Pre-Overtemperature Warning
• 4-Wire Serial Interface +1 (LAT, DI, DO, DCK + GCK)
  • 25MHz Data Clock (DCK) Frequency for Data Transfer
  • Double Edge Gray Scale Clock up to 16MHZ (GCK)
  • External GCK Watchdog Timer
  • Zero Data and Sleep Mode for Power Saving
• Register Programmable Options
  • Regular PWM or Adaptive Pulse Density Modulation
  • Built Internal PWM or External Gray Scale Clock (GCK)
  • Short Detection Threshold Voltage Selection (2/3/4/4.5V)
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• The AL58263Q 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 clusters
• Automotive local dimming displays
• Automotive front and back faceplates
• Automotive center stack displays
• Automotive interior and RGB lightings
• Automotive HVAC control panels
• Automotive gear shifter indicators
• Automotive exterior lightings