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PCA9958 Datasheet 24-channel Spi Serial Bus 63ma/5.5v Constant Current Led Driver

Manufacturer: NXP Semiconductors

Overview: PCA9958 24-channel SPI serial bus 63 mA/5.5 V constant current LED driver Rev. 1.

Datasheet Details

Part number PCA9958
Manufacturer NXP Semiconductors
File Size 847.97 KB
Description 24-channel SPI serial bus 63mA/5.5V constant current LED driver
Datasheet PCA9958-NXP.pdf

General Description

PCA9958 is a daisy-chain SPI-patible 4-wire serial bus controlled 24-channel constant current LED driver optimized for dimming and blinking 63 mA Red/Green/Blue/Amber (RGBA) LEDs.

Each LED 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 100 % 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 99.6 % that is used to either dim or blink all LEDs with the same value.

Key Features

  • 24 LED drivers. Each output programmable at:.
  • Off.
  • On.
  • 8 bits programmable LED brightness.
  • 8 bits programmable group dimming/blinking mixed with individual LED brightness.
  • Programmable LED output delay to reduce EMI and surge currents.
  • Gradation control for all channels.
  • Each channel can be assigned to one of six gradation control groups.
  • Programmable gradation time and rate for ramp-up and/or ramp-down operations.

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PCA9958 Distributor