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PCU9955 - 16-channel UFm I2C-bus 57mA constant current LED driver

Description

The PCU9955 is an Ultra-Fast mode (UFm) I2C-bus controlled 16-channel constant current LED driver optimized for dimming and blinking 57 mA Red/Green/Blue/Amber (RGBA) LEDs in amusement products.

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 adjusted through an external resistor.
  • Output current accuracy.
  • 6 % between output channels.
  • 8 % between PCU9.

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Full PDF Text Transcription

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PCU9955 16-channel UFm I2C-bus 57 mA constant current LED driver Rev. 2.1 — 29 June 2015 Product data sheet 1. General description The PCU9955 is an Ultra-Fast mode (UFm) I2C-bus controlled 16-channel constant current LED driver optimized for dimming and blinking 57 mA Red/Green/Blue/Amber (RGBA) LEDs in amusement products. Each LEDn output has its own 8-bit resolution (256 steps) fixed frequency individual PWM controller that operates at 31.25 kHz with a duty cycle that is adjustable from 0 % to 99.6 % to allow the LED to be set to a specific brightness value. An additional 8-bit resolution (256 steps) group PWM controller has 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.
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