PCA9955 Datasheet PDF (16-channel constant current LED driver)

PCA9955 - 16-channel constant current LED driver

This page provides the datasheet information for the PCA9955, a member of the PCA9952 16-channel constant current LED driver family.

Description

The PCA9952 and PCA9955 are 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 PCA9.

Datasheet Details

Part number	PCA9955
Manufacturer	NXP
File Size	509.13 KB
Description	16-channel constant current LED driver
Datasheet	PCA9955 Datasheet
Additional preview pages of the PCA9955 datasheet.

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Full PDF Text Transcription

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PCA9952; PCA9955 16-channel Fm+ I2C-bus 57 mA constant current LED driver Rev. 7.1 — 29 June 2015 Product data sheet 1. General description The PCA9952 and PCA9955 are 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.

Published: Feb 18, 2016 |