WS2812S

WS2812S Intelligent control LED integrated light source Features and Benefits Applications l Control circuit and RGB chip are integrated in a l Full-color module, Full color soft lights a lamp strip. package of 5050 components, form a complete l LED decorative lighting, Indoor/outdoor LED video control of pixel point. l Built-in signal reshaping irregular screen. circuit, after wave reshaping to the next driver, ensure wave-form distortion not accumulate. l Built-in electric reset circuit and power lost reset circuit. l Each pixel of the three primary color can achieve 256 brightness display, completed 16777216 color full color display, and scan frequency not less than 400Hz/s. l Cascading port transmission signal by single line. l When the refresh rate is 30fps, low speed model cascade number are not less than 512 points, high speed mode not less than1024 points. l Send data at speeds of 800Kbps. l The color of the light were highly consistent, cost-effective.. General description WS2812S 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 ampli fication drive circuit. Also include a precision internal oscillator and a programmable constant curre-nt 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 resha -ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend on the speed of signal transmission. LED with low driving voltage, environmental protection and energy saving, high brightness, scattering angl e 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 WS2812S Intelligent control LED integrated light source Mechanical Dimensions PIN configuration PIN function NO. Symbol 1 DOUT Control data signal output 2 DIN Control data signal input 3 VCC Power supply control circuit 4 NC 5 VDD Power supply LED 6 VSS Ground http://www.world-semi.com Function description WS2812S Intelligent control LED integrated light source Absolute Maximum Ratings Prameter Symbol Ratings Unit Power supply voltage VCC +3.5~+5.3 V Power supply voltage VDD +3.5~+5.3 V Input voltage VI -0.5～VDD+0.5 V Topt -25～+80 ℃ Tstg -55~+150 ℃ Operation junction temperature Storage temperature range Electrical Characteristics（TA=-20～+70℃，VDD=4.5～5.5V,VSS=0V,unless otherwise specified） Prameter Smybol conditions Min Tpy Max Unit Input current II VI=VDD /VSS —— —— ±1 µA VIH DIN ，SET 0.7VDD —— —— V VIL DIN ，SET —— —— 0.3 VDD V VH DIN ，SET —— 0.35 —— V Input voltage level Hysteresis voltage Switching characteristics（TA=-20～+70℃，VDD=4.5～5.5V,VSS=0V,unless otherwise specified） Prameter Symbol Condition Min Tpy Max Unit Operation frequency Fosc2 —— —— 800 —— KHz —— —— 300 ns —— —— 120 µs Duty ratio50% 400 —— —— Kbps —— —— —— 15 pF Transmission delay time Fall time Data transmission rate Input capcity tPLZ tTHZ FMAX CI http://www.world-semi.com CL=15pF,DIN→ DOUT,RL=10KΩ CL=300pF,OUTR/OU TG/OUTB WS2812S Intelligent control LED integrated light source LED characteristic parameter Emitting color Wavelength(nm) Luminous intensity(mcd) Current(mA) Voltage(V) Red 620-630 550-700 20 1.8-2.2 Green 515-530 1100-1400 20 3.0-3.2 Blue 465-475 200-400 20 3.2-3.4 Data transfer time( TH+TL=1.25µs±300ns) T0H 0 code ,high voltage time 0.4us ±150ns T1H 1 code ,high voltage time 0.85us ±150ns T0L 0 code , low voltage time 0.85us ±150ns T1L 1 code ,low voltage time 0.4us ±150ns RES low voltage time Above 50µs Sequence chart: 0 cod e 1 code RET co de T0 L T0H Cascade method: D1 D2 DIN D O DIN DO PIX1 PIX2 D3 D4 D IN DO T1L T1 H Treset http://www.world-semi.com PIX3 WS2812S Intelligent control LED integrated light source Data transmission method： reset code >=50us Data refresh cycle 1 first 2 4 b it D1 Data refresh cycle 2 seco n d 2 4 b it th ird 2 4 b it seco n d 2 4 b it D2 reset code first 2 4 b it th ird 2 4 b it seco n d 2 4 b it th ird 2 4 b it seco n d 2 4 b it th ird 2 4 b it th ird 2 4 b it D3 th ird 2 4 b it D4 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: Follow the order of GRB to sent data and the high bit sent at first. Typical application circuit: http://www.world-semi.com B7 B6 B5 B4 B3 B2 B1 B0 WS2812S Intelligent control LED integrated light source Reflow requirements： Profile Feature Lead-Based Solder Lead-Free Solder Average Ramp-Up Rate (Ts max to Tp ) 3℃/second max. 3℃/second max. Preheat: Temperature Min (Ts min) 100℃ 150℃ Preheat: Temperature Min (Ts max ) 150℃ 200℃ Preheat: Time ( ts min to ts max ) 60-120 seconds 60-180 seconds Time Maintained Above: Temperature (TL) 183 ℃ 217 ℃ Time Maintained Above: Time (t L) 60-150 seconds 60-150 seconds Peak/Classification Temperature (T P ) 215 ℃ 250 ℃ Time Within 5℃ of Actual Peak Temperature 10-30 seconds 5-10 seconds Ramp-Down Rate 6℃/second max. 6℃/second max. Time 25 ℃ to Peak Temperature 6 minutes max. 8 minutes max. ( tp) Reflow considerations： 1、Keep the product before using it in the oven and bake 65~70 degrees 24 house； 2、After coming out from the oven within 2 hours immediately complety； 3、Use of the product is not finished in time back in the oven； 4、When the shift, the patch and then completed the furnace had finished work, there is no patch back into the oven in time http://www.world-semi.com