1. Product Overview :
SK9816-EC20 is an intelligent external control LED light source that integrates a single-wire
transmission three-channel (RGB) drive control circuit and a light emitting circuit. The product
contains signal decoding module, data buffer, built-in constant current circuit and RC oscillator;
internal integrated current gain control module, CMOS process, low voltage, low power consumption;
default output of three-channel constant current driver is 19mA, single-wire output is adopted, The
output actions of each chip in series are synchronized; the power-on default is no light. Unipolar NRZ
data protocol of communication, the transmission-line LED driving control dedicated chip, while the
chip built-in current gain adjustment function, setting the current 1.75mA ~ 19mA, a total of 16 current
gain levels; refresh rate of the PWM signal is high 4KHz, displays become more smoother, dark streaks
solve the shooting screen;

2. Main Application Field:
● Full color LED string light, LED full color module, LED super hard and soft lights, LED guardrail tube,
LED appearance / scene lighting
● LED point light, LED pixel screen, LED shaped screen, a variety of electronic products, electrical
equipment etc..

3. Description:
● Top SMD internal integrated high quality external control line serial cascade constant current IC; 5V
application; default on electric lights;
● Control circuit and the RGB chip in EC2020 components, to form a complete control of pixel,
color mixing uniformity and consistency;
● Single-wire synchronous control, built-in one-way transmission function, the concatenation shaped
output; prevent attenuation data;
●OUTR/G/B each 4bits current gain adjustment bit, grayscale adjustment circuit ((gamma correction)
65536 gray scale adjustable);
● Current driver as high-accuracy and high stability oscillator, current error <± 5%.
● Built-in PWM patented technology, refresh rate up to 4KHz, signal transmission rate of 800Kbps.
● When sending current gain data, all need to send 16bits current gain adjustment bit. When sending RGB
three-color current gain bits, the reserved 4bits gain data is also randomly input, but it can not be null; any
data can be sent.

4. Mechanical Dimensions:

5. PIN configuration:

6. Recommended dimensions for PCB:

SK9816-EC20 LED Datasheet