Datasheet · 2019

Worldsemi WS2812B-V5 Intelligent Control LED — Datasheet

Addressable RGB LED; source for the 2.7 V minimum VIH that decides whether a 3.3 V MCU can drive it directly.

Author: Worldsemi
Year: 2019
Type: Datasheet
Credit: Worldsemi; copy hosted by eicom.ru (no Worldsemi-hosted copy located)

ws2812b
addressable led
logic level

WS2812B Ver. No.: V5 Intelligent control LED integrated light source Features and Benefits            The control circuit and the LED share the only power source. Control circuit and RGB chip are integrated in a package of 5050 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 5m 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. No need for external electric components and even the capacitor. Applications  Full-color module, LED full-color soft/hard light bar, LED guardrail tube.  LED decorative lighting, LED Screen, Indoor/outdoor LED video irregular screen, various electronic products, electrical equipment marquee. General description WS2812B is a intelligent control LED light source that the control circuit and RGB chip are integrated in a package of 5050 components.It internal include 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 data from controller, the first pixel collect initial 24bit data then sent to the internal data latch, the other data which reshaping by the internal signal reshaping amplification circuit sent to the next cascade pixel through the DO port. After transmission for each pixel, 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 improve excellent display effect. LED with low driving voltage, environmental protection and energy saving, high brightness, scattering angle is large, good consistency, low power, long life and other advantages. The control chip integrated in LED above becoming more simple circuit, small volume, convenient installation. http://www.world-semi.com 1/8 WS2812B Ver. No.: V5 Intelligent control LED integrated light source Mechanical Dimensions Remarks: Dimension of 5.0*5.4*1.57mm, default Tolerance of 0.05mm. PIN Configuration PIN Function NO. Symbol PIN Function description 1 VDD POWER SUPPLY 2 DOUT DATA OUT Control data signal output 3 VSS GROUND Ground,data & power grounding 4 DIN DATA IN Control data signal input Power supply Absolute Maximum Ratings Parameter Symbol Ratings Unit Power supply voltage VDD +3.7~+5.3 V Logical Input Voltage VI VDD-0.3V～VDD+0.7 V Electrical Characteristics（TA=25℃, VDD=5V, VSS=0V, unless otherwise specified） Parameter Symbol Min Tpy Max Unit Conditions Input current II —— —— ±1 µA VI=VDD/VSS High Voltage Input VIH 2.7V —— VDD+0.7V V DIN，SET Low Voltage Input VIL -0.3V —— 0.7V V DIN，SET http://www.world-semi.com 2/8 WS2812B Ver. No.: V5 Intelligent control LED integrated light source Switching Characteristics（TA=25℃, VDD=5V, VSS=0V, unless otherwise specified） Parameter Symbol Min Tpy Max Unit Condition Transmission delay time tPLZ —— —— 300 ns CL=15pF, DIN→DOUT,RL=10KΩ Fall time tTHZ —— —— 120 µs CL=300pF, OUTR/OUTG/OUTB Input capacity CI —— —— 15 pF —— LED Characteristics Parameter Symbol Brightness IV Wavelength λd Color Quiescent Current: 0.6mA Mini Typ Max Red 300 310 500 Green 600 780 1000 Blue 200 215 300 Red 620 621 630 Green 515 520 525 Blue 465 471 475 Unit Condition (Working current) mcd 12mA nm 12mA Data Transfer Time T0H 0 code, high voltage time 220ns~380ns T1H 1 code, high voltage time 580ns~1µs T0L 0 code, low voltage time 580ns~1µs T1L 1 code, low voltage time 580ns~1µs RES Frame unit, low voltage time >280µs Sequence Chart Cascade Method D1 DIN DO PIX1 http://www.world-semi.com 3/8 D2 DIN DO PIX2 D3 DIN DO PIX3 D4 WS2812B Ver. No.: V5 Intelligent control LED integrated light source Data Transmission Method Note: The data of D1 is send by MCU, and D2, D3, D4 through pixel internal reshaping amplification to transmit. Composition of 24bit Data G7 G6 G5 G4 G3 G2 G1 G0 R7 R6 R5 R4 R3 R2 R1 R0 Note: Data transmit in order of GRB, high bit data at first. Typical Application Circuit: No need extra filter capacitor in PCB layout http://www.world-semi.com 4/8 B7 B6 B5 B4 B3 B2 B1 B0 WS2812B Ver. No.: V5 Intelligent control LED integrated light source Packing Standard Carrier tape Packing: 1K/Reel: 167*12mm 4.5K/Reel: 327*12mm Anti-static bag Product Label The foam protective layer Guard against damp/ Keep dry 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 http://www.world-semi.com 5/8 WS2812B Ver. No.: V5 Intelligent control LED integrated light source 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 the cleaning 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. 2.2. Moisture-proof packaging TOP SMD LEDs are moisture sensitive components. LEDs are packaged in aluminum foil bag to prevent the from absorbing moisture during transport and storage. A desiccant is placed in the bags to absorb moisture. If the LED absorbs moisture, then it evaporates and expands when in reflow process, which may break the colloid from the bracket and damage the optical performance of LED. For this reason, moisture-proof packaging is to prevent the from absorbing moisture during transport and storage. The moisture resistance rating of WORLDSEMI’s LED is: LEVEL 5a. Tabel I - IPC/JEDEC J-STD-020 Moisture/Reflow Sensitivity Classification MSL Level LEVEL1 LEVEL2 LEVEL2a LEVEL3 LEVEL4 LEVEL5 LEVEL5a LEVEL6 Workshop Life Time Conditions 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 (1) Please use the LED under the condition of “T<30℃，RH<60%”. (2) Use up within 24 hours after removing the packages. (3) We would recommend to do dehumidification if they exceed the valid storage period of products or dampened due to other reasons. http://www.world-semi.com 6/8 WS2812B Ver. No.: V5 Intelligent control LED integrated light source 2.4. Dehumidification Operation (Non-leakage of air, baking temperature: 70℃-75℃) 3. Management of secondary SMT process It’s necessary to do moisture-proof treatment when the secondary reflow carried out that followed the first reflow. Exposed at condition of “＜30 °C/60% RH”, it is recommended to pass the secondary reflow within 2 hours;It can’t be more than 2 hours to be exposed at condition of “<30℃/60%RH” and dehumification operation is requested for a longer interval reflow. For instance, place in a drying box or a container with desiccant, and dehumidify it before the secondary reflow(Low temperature baking operation: 70℃-75℃, ≥12 hours). For exposure to “< 30 °C / 60% RH” more than 12 hours after one welding, can't pass the second secondary reflow. 4. 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 curve recommended by the solder paste manufacturer. Curve Description Lead-free The 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)Rate Cooling <6℃/S Room Temperature to Peak Holding Time <6 min Remarks: 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. http://www.world-semi.com 7/8 WS2812B Ver. No.: V5 5. Intelligent control LED integrated light source Assembly Precautions 1. Clip the LED from its 2. Neither directly touch the 3. Not to be double stacked, it 4. Can not be stored in or side. gel surface with the hand or sharp instrument, it may damage its internal circuit. applied in the acidic sites of may PH<7. damage its internal circuit. Modify Record Version № Status Bar Modify Content Summary Date Reviser Approved V1.0 N New WS2812B - V5 20190219 Shen JinGuo Yin HuaPing V1.0 N New 20170523 Shen JinGuo Yin HuaPing V1.1 M Maximum Ratings, Data Transfer Time 20171009 Shen JinGuo Yin HuaPing V1.2 M Maximum Ratings, Data Transfer Time 20180207 Shen JinGuo Yin HuaPing V2.0 M Electrical Parameters 20180412 Shen JinGuo Yin HuaPing V3.0 M Cautions 20180719 Shen JinGuo Yin HuaPing V4.0 M Logical input voltage; Brightness 20180822 Shen JinGuo Yin HuaPing Shen JinGuo Yin HuaPing V5.0 M Remarks: Power reverse protection circuit, Cautions; No need external capacitor 20190323 Initial version: V1.0, Status bar: N--New, A--Add, M--Modify, D--Delete. 1. Version number plus "0.1" if for add & modify parameters, eg. V1.0→ V1.1 2. Major revision or many parameters modified, version number plus “1.0”, eg. V1.0→ V2.0 3. No version number is attached to Part Number http://www.world-semi.com 8/8