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PCA9955BTW LED照明驅動器 I2c

品牌：
NXP
型號：
PCA9955BTW
類別：
貼片
結構：
固定

發布詢價信息

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相關產品

產品信息

NXP Semiconductors PCA9952 16-channel
Constant Current LED Driver

NXP Semiconductors PCA9955 LED drivers are I2C controlled 16-channel constant current drivers designed for dimming and blinking 57mA Red/Green/Blue/Amber (RGBA) LEDs in amusement products. Each channel has an 8-bit resolution (256 steps) 31.25kHz PWM controller with a duty cycle that is adjustable between 0% to 99.6%. This allows each LED to be set to a specific brightness. An additional 8-bit resolution (256 steps) group PWM controller has both a fixed frequency and an adjustable frequency. This additional controller is used to either dim or blink all the 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 57mA, tolerate up to 40V 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
1MHz Fast-mode Plus compatible I2C-bus interface with 30mA 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 31.25kHz PWM signal
256-step group brightness control allows general dimming (using a 122Hz PWM signal) from fully off to maximum brightness (default)
256-step group blinking with frequency programmable from 15Hz to 16.8s 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

公司介紹

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PCA9955BTW LED照明驅動器 I2c

產品信息

NXP Semiconductors PCA9952 16-channel Constant Current LED Driver

公司介紹

相關產品

NXP Semiconductors PCA9952 16-channel
Constant Current LED Driver