WS2812C-2020

Intelligent control LED
integrated light source

Features and Benefits
The control integrated circuit and the LED share the only power source.
5mA operating current per channel.
Control circuit and RGB chip are integrated in a package of 2020 components, to form a complete addressable pixel.
Built-in signal reshaping circuit, after wave reshaping to the next driver, ensure wave-form distortion not accumulate.
Built-in electric reset circuit and power lost reset circuit.
Each pixel of the three primary color can achieve 256 brightness display, completed 16777216 color full color display,and scan frequency is of 2KHz.
Cascading port transmission signal by single line.
Any two point the distance not more than 3m transmission signal without any increase circuit.
When the refresh rate is 30fps, cascade number are not less than 1024 pixels.
Send data at speeds of 800Kbps.

 The color of the light is highly consistent, cost-effective..
Applications
Full-color module, Full color soft lights a lamp strip.

LED decorative lighting, Indoor/outdoor LED irregular screen, game machine and amusement equipment etc.

General description
WS2812C-2020 is an intelligent control LED light source, its exterior adopts the latest MOLDING packaging technology,
the control circuit and RGB chips are integrated in a package of 2020 component. Its internal includes intelligent digital port
data latch and signal reshaping amplification drive circuit. Also include a precision internal oscillator and a voltage
programmable constant current control part, effectively ensuring the pixel point light color height consistent.
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN port receive datafrom controller, the first pixel collect initial 24bit data then sent to the internal data latch, the other data which reshaping by theinternal signal reshaping amplification circuit sent to the next cascade pixel through the DO port. After transmission for eachpixel, the signal to reduce 24bit. pixel adopt auto reshaping transmit technology, making the pixel cascade number is not
limited the signal transmission, only depend on the speed of signal transmission.
RESET time >280μs , it won't cause wrong reset while interruption, it supports the lower frequency and inexpensive MCU.
Refresh Frequency updates to 2KHz, Low Frame Frequency and No Flicker appear in HD Video Camera, it improveexcellent display effect.
LED with low driving voltage, environmental protection and energy saving, high brightness, large scattering angle, goodconsistency, low power, long life and other advantages. The control chip integrated in LED above becoming more simple
circuit, small volume, convenient installation.

Mechanical Dimensions

Back View

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Top View

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Intelligent control LEDintegrated light source

Side View

PCB Solder Pad

PIN Configuration

PIN Function
NO.

SymbolPIN

Function description

1DO

DATA OUT

Control data signal output

2

GND

GROUND

Ground, data & power grounding

3DI

DATA IN

Control data signal input

4

VDD

POWER SUPPLYPower supply

Absolute Maximum Ratings
Parameter

SymbolRatings

Unit

Power supply voltage

VDD+3.7~+5.3

V

Logical Input Voltage

VI

VDD-0.7～VDD+0.7

V

Operation junction temperature

Topt-25～+85℃

Storage temperature range

Tstg-40~+105℃

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WS2812C-2020Intelligent control LED
integrated light source

Electrical Characteristics（TA=-20～+70℃, VDD=4.5～5.5V, VSS=0V, unless otherwise specified）
Parameter

Symbol

Min

Tpy

Max

UnitConditions

Input current

II——

——

±1µA

VI=VDD/VSS

VIH

0.7VDD————V

DIN, SET

VIL

——

——

0.3 VDDV

DIN, SET

VH

——

0.35

——

V

DIN, SET

Input voltage level
Hysteresis voltage

Switching Characteristics（TA=-20～+70℃, VDD=4.5～5.5V, VSS=0V, unless otherwise specified）
Parameter

Symbol

Min

Tpy

Max

Unit

Condition

Transmission delay timetPLZ

——

——

300ns

CL=15pF, DIN→DOUT, RL=10KΩ

Fall timetTHZ

——

——

120µs

CL=300pF, OUTR/OUTG/OUTB

Input capacity

CI

——

——

15pF

——

LED Characteristics
Parameter

SymbolLuminous intensity

WavelengthIVλdQuiescent Current

Color
Min.

Typ.

Max.

RED

33--

40

GREEN

120--

144

BLUE

28--

34

RED

620--

625

GREEN

520

--

525

BLUE

460--

465

Test Condition
Unit(Working current)

mcd

5mA

nm5mA

Data Transfer Time
T0H

0 code, high voltage time

220ns~380ns

T1H

1 code, high voltage time

580ns~1µs

T0L0 code, low voltage time

580ns~1µs

T1L

1 code, low voltage time

220ns~420ns

RES

Frame unit, low voltage time

>280µshttp://www.world-semi.com

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WS2812C-2020

Intelligent control LED
integrated light source

Sequence Chart
0 codeCascade Method

T0L

D1

T0H

DIN DO

T1L

1 code

D2

PIX1

T1H

DIN DO

D3

PIX2

DIN DO

D4

PIX3

TresetRET code

Data Transmission Method

Note: The data of D1 is send by MCU, and D2, D3, D4 through pixel internal reshaping amplification totransmit.
Composition of 24bit Data
G7

G6G5G4G3G2G1G0R7R6R5R4R3Note: Data transmit in order of GRB, high bit data at first.
Typical Application Circuit

Remarks: C1 is the filter capacitor for VDD, its value of 100nF.

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R2

R1

R0

B7

B6B5

B4B3

B2

B1B0

WS2812C-2020

Intelligent control LED
integrated light source

Tape Size (Unit: mm)

Inspector:

LED Taping Position
UNIT: mmCARRIER TAPES TEST REPORTS
SYMBOLA0

B0

K0

P0P1P2TE

F

D0

D1W

SPEC2.20

2.40

1.01

4.00

4.00

2.000.18

1.75

3.50

1.50

1.00

8.00

Reel Packing Specifications (Unit: mm).

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WS2812C-2020

Intelligent control LED
integrated light source

Moistureproof bag packing
SPQ: 4000PCS /ReelInternal label

Moisture-proof bag

DesiccantExternal label

Top SMD LED Using Instructions
1.

Summary

To make the best use of WORLDSEMI’s LED, please refer to the below precautions, they are of same usage
method as other electronic components.
2.

Cautions

2.1. Dust & Cleaning
The surface of the LED is encapsulated with modified epoxy resin because it plays a very good role in protecting
the optical performance and aging resistance. The modified epoxy resin is easy to stick with dust and must be kept
clean. When there’s a certain amount of dust on the surface of the LED, it won’t affect brightness, but dust proof
should be taken care of. Promoting the use of unsealed package in preference to others and the assembled LEDs
should be placed in a clean container.
Avoid using the organic solvents to clean the dust on the LED surface and it’s necessary to confirm whether thecleaning fluid will dissolve the LED.
Do not clean the LEDs by the ultrasonic. Some parameters affecting the LED performance must be evaluated if
have no alternative but to the ultrasonic cleaning method, such as ultrasonic power, baking time and assembly
conditions, etc.

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WS2812C-2020

Intelligent control LED
integrated light source

2.2. Moisture-proof packaging
TOP SMD LEDs are moisture sensitive components. LEDs are packaged in aluminum foil bag to prevent thefrom absorbing moisture during transport and storage. A desiccant is placed in the bags to absorb moisture. If theLED absorbs moisture, then it evaporates and expands when in reflow process, which may break the colloid fromthe bracket and damage the optical performance of LED. For this reason, moisture-proof packaging is to prevent thefrom absorbing moisture during transport and storage. The moisture resistance rating of WORLDSEMI’s LED is:
LEVEL 6.
Tabel I - IPC/JEDEC J-STD-020 Moisture/Reflow Sensitivity Classification
MSL Level
LEVEL1LEVEL2LEVEL2aLEVEL3
LEVEL4LEVEL5LEVEL5aLEVEL6

Workshop LifeTimeConditions
Unlimited≤30℃/85%RH
1 Year≤30℃/60%RH
4 Weeks≤30℃/60%RH
168 Hours≤30℃/60%RH
72 Hours≤30℃160%RH
48 Hours≤30℃/60%RH
24 Hours≤30℃/60%RH
Take-out and Use immediately≤30℃/60%RH

2.3. Management after unpacking
It’s recommend to perform SMT assembly as soon as possible after opening the moisture-proof bag, and reflow
soldering should be completed within 4 hours after SMT assembly; for the remaining LEDs, they should bere-packed in seal package and placed in moisture-proof cabinet (Please note that it’s necessary to rebake at“70℃-75℃/48 hours” before next SMT process).

3.

Dehumidification Operation (Non-leakage of air, baking temperature:70℃-75℃)

a. MD within 2 weeks, baking time: 24 hours.
b. MD exceeds 2 weeks, baking time: 48 hours.

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WS2812C-2020

Intelligent control LED
integrated light source

4.

Management of secondary SMT process

It’s necessary to do moisture-proof treatment when the secondary reflow carried out that followed the first reflow.
It can’t be more than 2 hours to be exposed at condition of “<30℃/60%RH” and dehumification operation isrequested for a longer interval reflow. For instance, place in a drying box or a container with desiccant, anddehumidify it before the secondary reflow(Low temperature baking operation: 70℃-75℃, ≥12 hours).

5.

SMT Reflow

Refer to the parameters listed below, the experimental results prove that the TOP SMD LED meets the JEDEC
J-STD-020C standards. As a general guideline, it is recommended to follow the SMT reflow temperature curverecommended by the solder paste manufacturer.
Curve Description

Lead-freeThe lowest preheat temperature (Tsmin)

Reflow
150℃

The highest preheat temperature (Tsmax)

200℃

Preheating time (Tsmin to Tsmax) (ts)60-180 S

Average rate of temperature rise (Tsmax to Tp)<3℃/S

LIQUID REGION temperature (TL)

217℃

LIQUID REGION Holding Time (tL)

60-150 S

Peak Temperature (Tp)

240℃High Temperature Region(Tp=-5℃) Holding<10 S

Time (tp)RateCooling<6℃/S

Room Temperature to Peak Holding Time

<6 minRemarks: 1. These general guidelines may not apply to all PCB designs and reflow soldering configurations.
2. All temperatures referred are measured on the surface of the package body.

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WS2812C-2020

Intelligent control LED
integrated light source

6.

Assembly Precautions
1. Clip the LED from its side.

2. Neither directly touch the gel surface with the handor sharp instrument, it may damage its internal circuit.

3. Not to be double stacked, it may damage its

4. Can not be stored in or applied in the acidic sites ofinternal circuit.

PH<7.

Modify Record
Version №

Status BarV1.0NRemarks:

Modify Content Summary
New-Official release

Initial version: V1.0；Version number plus "0.1" after each revision;
Status bar: N--New, A--Add, M--Modify, D--Delete.

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Date

ReviserApproved

20180701

Shen JinGuo

Yin HuaPing