1429: 产品描述BREAKOUT PWM LED DVR SPI 24CH; 产品类别开发板/开发套件/开发工具; 文件大小264KB，共2页; 制造商Adafruit

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1429概述

BREAKOUT PWM LED DVR SPI 24CH

1429规格参数

参数名称	属性值
输出和类型	24，非隔离
特性	SPI 数字接口
电压 - 输入	5 V ~ 24 V
所含物品	板
使用的 IC/零件	TLC5947

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BOARDS / BREAKOUT BOARDS

Adafruit 24-Channel 12-bit PWM LED Driver

- SPI Interface - TLC5947

PRODUCT ID: 1429

DESCRIPTION

For all of you out there who want to control 24 channels of PWM, we salute you! We

also would like you to check out this breakout board for the TLC5947 PWM driver

chip. This chip can control 24 separate channels of 12-bit PWM output. Designed

(and ideal) for LED control, this board is not good for driving servos. If you need to

drive servos, we have a controller for that over here.

Only three "SPI" pins are required to send data (our Arduino library shows how to to

use any digital microcontroller pins). Best of all, the design is completely chainable.

As long as there's enough power for all the boards you can chain as many as you'd

like, like a little trail of blue PCBs stretching out into the sunset. Each of the 24

output's is constant-current and open drain. You can drive multiple LEDs in series,

with a V+ anode supply of up to 30V. If you want to drive something that requires

a digital input, you must use a pullup resistor from the drive pin to your logic level

to create the full waveform.

One resistor is used to set the current for each of the outputs, the constant current

means that the LED brightness doesn't vary if the power supply dips. We use a 3.3K

resistor for about 15mA but you can solder a thru-hole resistor over it if you'd like

to change that value. Check the TLC5947 datasheet for details on resistor-to-

current values.

We include a few extras to make this board easy to use: a durable 5V low-dropout

regulator (with reverse polarity protection in case y'know, you plug it in

backwards), a green power-good LED, four mounting holes and a current-set

resistor. A bit of 0.1" header is also included so you can solder it on and plug into a

breadboard.

To use: Power V+ with 5-30VDC, and connect ground to the common ground.

Then send 3-5V logic SPI data on DIN (data in), CLK (clock) and LAT (latch). If you'd

like to quickly turn off all the outputs, raise the OE pin - it's pulled low to enable

the PWM outputs.Our Arduino library will get you started with blinking LEDs, install

it and run the example code with the noted pin configuration.

http://www.adafruit.com/products/1429

7/16/2015

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