104990128

WS2812B Intelligent control LED integrated light source Features and Benefits l Intelligent reverse connect protection, the power supply reverse connection does not damage the IC. l The control circuit and the LED share the only power source. l Control circuit and RGB chip are integrated in a package of 5050 components, form a complete control of pixel point. l Built-in signal reshaping 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 Any two point the distance more than 5m transmission signal without any increase circuit. l When the refresh rate is 30fps, cascade number are not less than1024 points. l Send data at speeds of 800Kbps. l The color of the light were highly consistent, cost-effective.. Applications l Full-color module, Full color soft lights a lamp strip. l LED decorative lighting, Indoor/outdoor LED video irregular screen. 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 ampli fication drive circuit. Also include a precision internal oscillator and a 12V voltage programmable constant curr e-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 WS2812B Intelligent control LED integrated light source Mechanical Dimensions PIN configuration PIN function NO. Symbol Function description 1 VDD 2 DOUT 3 VSS Ground 4 DIN Control data signal input Power supply LED Control data signal output Absolute Maximum Ratings Prameter Symbol Ratings Unit 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） http://www.world-semi.com WS2812B Intelligent control LED integrated light source 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 WS2812B Intelligent control LED integrated light source LED characteristic parameter Emitting color Model Wavelength(nm) Luminous intensity(mcd) Voltage(V) Red 13CBAUP 620-630 550-700 1.8-2.2 Green 13CGAUP 515-530 1100-1400 3.0-3.2 Blue 10R1MUX 465-475 200-400 3.0-3.4 Data transfer time( TH+TL=1.25µs±150ns) T0H 0 code ,high voltage time 0.35us ±150ns T1H 1 code ,high voltage time 0.9us ±150ns T0L 0 code , low voltage time 0.9us ±150ns T1L 1 code ,low voltage time 0.35us ±150ns RES low voltage time Above 50µs Sequence chart: T0 L 0 cod e T0H T1L 1 code T1 H Treset RET co de Cascade method: D1 D2 DIN DO D IN DO PIX1 PIX2 D3 http://www.world-semi.com D4 DIN DO PIX3 WS2812B 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. http://www.world-semi.com B7 B6 B5 B4 B3 B2 B1 B0 WS2812B Intelligent control LED integrated light source Typical application circuit: U1 5V 1 C1 104 2 VDD DIN DOUT VSS 4 DIN 3 WS2812B U2 5V 1 C2 104 2 VDD DIN DOUT VSS 4 3 WS2812B U1 5V 1 C1 104 DOUT2 VDD DIN DOUT VSS WS2812B http://www.world-semi.com 4 3