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The specification of APA102 LED CHIP
Source:Shenzhen Led Color Optoelectronic Co.,Ltd   Time:2014-07-03

APA102 LED CHIP 

General Description 

       APA102 is a type ic for the three-color RGB Diming control strip and string ,This ic using the CMOS process 

to provide three-color RGB LED output driver to adjust the output with 256 gray scale and 32 brightness adjustment 

,APA with 2 signal output way , one is clock ,another is data, the clock and data is synchronizated ,so that the 

crystal cascade piece of output movement is sychronizated .


Feature 

    CMOS process,low voltage ,low consumption 

     Synchronization of two-lane

     Choose positive output or negative RGB three-color LED output  

     8 bit(256 level) color set ,5bit(32 level) brightness adjustment 

     Build-20ma constant current output 

     With self-detection signal build in support for continuous oscillation PWM

     output ,can be maintained static screen

Application 

     LED lamp

      LED Strip ,led pixel module 

      LED billboard  LED screen 

PRODUCT  SPECIFICATIONS

Color

wavelength

Refresh rate

Voltage

Power 

Consumption 

Weight

  (g)

Angle

Dimensions

(mm)

L*W*H

Operating

Temperature

Full color 1677216

R:500-650mcd

G:370-530mcd

B:120-165mcd

400 cycle

DC5V

0.2W

(MAX:1W)

1

160

5x5x1.4

-40-70


PIN Description

 

NO.

PIN NAME

 I/O

FUNCTION

1

   VDD

P

Power is terminal 

  2

   VREG

O

4.5V regulator output

  3

   CKO

O

Series with the output clock signal 

  4

   SDO

O

Series with the output data

  5

   VEN

I

Self-test function selection

  6

   CSEL

I

Invert the clock signal cascade

  7

   POLAR

I

Positive and negative output options

  8

   OSCI

I

Oscillator input

  9

   SDI

I

Series with the input data

 10

   CKI

I

Series with the input clock signal 

 11

  REXT

I

Constant current source to adjust side 

 12

   VSS

P

Power supply negative terminal 

 13

    G

O

Green LED output

 14

    R

O

Red LED output

 15

    B

O

Blue LED output 

(Block diagram)



(Absolute Maximum Rating)

Supply volage --------------   -0.3-6.0V

Input voltage---------------- VSS-0.3 to VDD +0.3V

Operating temperature----------------  -40 to +70

Storage temperature-------------------  -50 to +125

Note: Stress above those listed may cause permanent damage to the devices

 

(Electrical Characteristic)

Symbol

Parameter

Condition

Min.

Typ.

MAX

Units

VDD

Supply Voltage

 

 

5.0

5.5

  V

VIH

Input High Voltage

 

0.7VDD

 

VDD+0.3

  V

VH

Input Low Voltage

 

VSS-0.3

 

0.3VDD

  V 

LOL

Sink Current Voltage(RGB)

VDD=5V,VOL>1V

  22.5

24.5

26.5

 mA

RIN

Pull High

VDD=5V

 

570

 

 kΩ

VREG

Regulator Voltage(VREG)

VDD=5V

  4.4

4.5

4.7

 V

FOSC

Oscillator Frequency 

 

  800

 

1200

 KHz

 

(Function Description)

(1) cascading data structure

   Tabdem N-LED

     



Global bit:5 bit (32 level) brightness setting,while controlling R,G,B three-color constant current output value,if set the global bit for the 10000( 16/31 ) is 

the output current is half again the original PWM settings

  DATA

MSB←→LSB

Driving Current

00000

0/31

00001

1/31

00010

2/31

·····

 

11110

30/31

11111

31/31(max)

 

PWM input and output signals Relations


Data 

MSB--

Duty Cycle

00000000

0/256(min)

00000001

1/256

00000010

2/256

········

 

11111101

253/256

11111110

254/256

11111111

255/256(max)

 (2). The number of pixel per second sent to the CKI frequency (FCKI) minus the Start 

Frame bit divided by the number 40 the number of LED Frame bit 32, if the CKI frequency(FCKI

) to 512KHZ. The pixel number (512000-40)/32=15998, if the 50 second update Views can be connected

 in series LED number 15998/50=319. To increase the number of cascaded IC CKI frequency
(3).POLAR to empty ,R,G,B for the negative output;POLAR access VSS ,R,G,B is positive output 
(4).VEN: self-detection 
  DATA field to the middle of 3 bit is B,G,R in the MSB of the opposite phase,otherwise regarded

 as invalid data. VEN close to the empty when the self-detection; when VEN VSS then activated self-detection 
(5).CSEL to empty when the CKO and CKI,RP:CSEL connected with VSS when the CKO compared with CKI.


Application Circuit

Youtube:http://www.youtube.com/watch?v=1JLJnDNyZZ4

You can download the Pdf of APA102 parameter here :

http://www.szledcolor.com/upload/20141124204526_1.pdf