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NXP Semiconductors PCA9958 24-Bit 63mA Current LED Drivers with SPI

NXP Semiconductors PCA9958 24-Bit 63mA Current LED Drivers with SPI are 24-channel SPI serial bus 63mA LED drivers with a supply voltage range of 2.7V to 5.5V. These devices are optimized for dimming and blinking RGBA LEDs. Each LED features its own 8-bit resolution fixed frequency operating at 31.25kHz with an adjustable duty cycle of 0% to 100% for brightness control. The additional PWM controller has a fixed frequency of 122Hz and an adjustable frequency of 15Hz duty cycle from 0% to 99.6% for dimming and blinking control.

The output peak current is adjustable with an 8-bit linear digital-to-analog converter (DAC) from 250µA to 63.75mA. The NXP PCA9958 offers open/short detection circuitry and thermal shutdown protection. These devices have a 4-wire SPI bandwidth of 10MHz to communicate with the local micro.

Features

  • 24x programmable LED drivers
    • Off/on control
    • 8-bit programmable
      • LED brightness
      • Group and individual dimming/blinking
    • Output delay to reduce EMI and surge currents
  • Gradation control
    • Each can be assigned to one of six control groups
    • Ramp up/down (slew rate)
    • Step time (time per step from 256 steps)
    • Hold on current (time at peak)
  • Internal power-on reset
  • Output accuracy
    • ±7.5% absolute accuracy with 60mA
    • ±9% absolute accuracy with 30mA output current
    • ±5% maximum channel-to-channel variation
    • ±7% maximum device-to-device variation
  • Latch-up performance exceeds 100mA per JESD 78, Class II
  • ESD protection exceeds per JESD22
    • 2kV HBM
    • 750V CDM
  • 5.5V tolerant inputs on non-LED pins
  • 0.5mm pitch, 6mm x 6mm x 0.85mm HVQFN40 package rated up to +125°C

Applications

  • Automotive
    • Armrest lighting
    • Cabin roof lighting
    • Digital clusters
    • Door lighting
    • eCockpit
    • Infotainment
    • Steering wheel lighting
  • Industrial
    • Backlight for LCDs
    • Backlight keypads/keyboards
    • Breathlight control
    • Displays and status information
    • LED drivers RGB/RGBA

Block Diagram

Block Diagram - NXP Semiconductors PCA9958 24-Bit 63mA Current LED Drivers with SPI

Resources

Related Development Tools

NXP Semiconductors Płyta programistyczna PCA9958HN-ARD

Łatwa w użyciu platforma do testowania stałoprądowych sterowników LED PCA9958HN SPI do magistrali szeregowej.

Learn Moreo NXP Semiconductors Płyta programistyczna PCA9958HN-ARD View Productspowiązany z NXP Semiconductors Płyta programistyczna PCA9958HN-ARD
Opublikowano: 2024-10-14 | Zaktualizowano: 2024-10-17