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Home » NEWEST Products » New by Manufacturer » NXP Semiconductors » PCA9952 LED Driver - NXP
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NXP PCA9952 16-channel Fm+ I2C-bus 57 mA Constant Current LED Driver

NXP PCA9952 16-channel Fm+ I2C-bus 57 mA Constant Current LED Driver

NXP PCA9952 16-channel Fm+ I2C-bus 57 mA Constant Current LED Driver optimizes dimming and blinking in 57 mA Red/Green/Blue/Amber (RGBA) LEDs for amusement products. Each LEDn output provides its own 8-bit resolution (256 steps) fixed frequency individual PWM controller operating at 31.25 kHz with an adjustable duty cycle from 0% to 99.6%. This allows the LED to be set to a specific brightness value. An additional 8-bit resolution (256 steps) group PWM controller offers both a fixed frequency of 122 Hz and an adjustable frequency between 15 Hz to once every 16.8 seconds with a duty cycle that is adjustable from 0% to 99.6% that is used to either dim or blink all LEDs with the same value.

Features
  • 16 LED drivers. Each output programmable at:
    • Off
    • On
    • Programmable LED brightness
    • Programmable group dimming/blinking mixed with individual LED brightness
    • Programmable LEDn output enable delay to reduce EMI and surge currents
  • 16 constant current output channels can sink up to 57 mA, tolerate up to 40 V when OFF
  • Output current accuracy
    • 6% between output channels
    • 8% between PCA9952/55 devices
  • Open/short load/overtemperature detection mode to detect individual LED errors
  • 1 MHz Fast-mode Plus compatible I2C-bus interface with 30 mA high drive capability on SDA output for driving high capacitive buses
  • 256-step (8-bit) linear programmable brightness per LEDn output varying from fully off(default) to maximum brightness using a 31.25 kHz PWM signal
  • 256-step group brightness control allows general dimming (using a 122 Hz PWM signal) from fully off to maximum brightness (default)
  • 256-step group blinking with frequency programmable from 15 Hz to 16.8 s and duty cycle from 0% to 99.6%
  • Output state change programmable on the Acknowledge or the STOP Command to update outputs byte-by-byte or all at the same time (default to ‘Change on STOP’)

Applications
  • RGB or RGBA LED drivers
  • LED status information
  • LED displays
  • LCD backlights
  • Keypad backlights for cellular phones or handheld devices
  • Automotive lighting
 Block Diagram
NXP PCA9952 16-channel Fm+ I2C-bus 57 mA Constant Current LED Driver Block Diagram

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