WS2812B Intelligent control LED integrated light source

Transcription

1 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, form a complete control of pixel point. 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 color full color display, and scan frequency not less than 400Hz/s. Cascading port transmission signal by single line. Any two point the distance more than 5m transmission signal without any increase circuit. When the refresh rate is 0fps, cascade number are not less than024 points. Send data at speeds of 800Kbps. The color of the light were highly consistent, cost-effective.. Applications Full-color module, Full color soft lights a lamp strip. LED decorative lighting, Indoor/outdoor LED video irregular screen. General description 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 2V 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 port receive data from controller, the first pixel collect initial 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. 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.

2 Mechanical Dimensions PIN configuration PIN function NO. Symbol Function description Power supply LED 2 Control data signal output Ground 4 Control data signal input Absolute Maximum Ratings Prameter Symbol Ratings Unit Power supply voltage V DD +.5~+5. V Input voltage V I -0.5~+0.5 V Operation junction temperature Topt -25~+80 Storage temperature range Tstg -40~+05 Electrical Characteristics(TA=-20~+70,=4.5~5.,=0V,unless otherwise specified)

3 Prameter Smybol conditions Min Tpy Max Unit Input current I I V I=V DD/V SS ± µa Input voltage level VIH,SET 0.7 V VIL,SET 0. V Hysteresis voltage VH,SET 0.5 V Switching characteristics(ta=-20~+70,=4.5~5.,=0v,unless otherwise specified) Prameter Symbol Condition Min Tpy Max Unit Transmission delay time tplz CL=5pF,,RL=0KΩ 00 ns Fall time tthz CL=00pF,OUTR/OU TG/OUTB 20 µs Input capcity CI 5 pf Reflow instructions Curve description Lead in solder reflow SMT LINE The lowest preheat temperature(tsmin) The highest preheat temperature(tsmax) Preheating time (Tsmin to Tsmax)(ts) S S Average rate of temperature rise(tsmax to Tp) < /S < /S liquid phase temperature (TL) 8 27 Holding time liquid region (tl) S S peak temperature(tp) Data transfer time( TH+TL=.25µs±600ns) T0H 0 code,high voltage time 0.4us ±50ns TH code,high voltage time 0.8us ±50ns T0L 0 code, low voltage time 0.85us ±50ns

4 TL code,low voltage time 0.45us ±50ns RES low voltage time Above 50µs Sequence chart: 0 code code T0H TH T0L TL RET code Treset Cascade method: D D2 D D4 DO DO DO PIX PIX2 PIX Data transmission method: reset code >=50us reset code Data refresh cycle Data refresh cycle 2 D first third first third D2 third third D third third D4

5 Note: The data of D is send by MCU,and D2, D, D4 through pixel internal reshaping amplification to transmit. Composition of data: G7 G6 G5 G4 G G2 G G0 R7 R6 R5 R4 R R2 R R0 B7 B6 B5 B4 B B2 B B0 Note: Follow the order of GRB to sent data and the high bit sent at first. Typical application circuit: U 4 C 04 2 U2 4 C U 4 C 04 2