Worldsemi WS2814A Signal line 256 Gray level 4-channel Constant current LED driver IC
WS2814Aは、4チャンネルの定電流LEDドライバICです。その内部には、インテリジェントなデジタルポートデータラッチと信号整形増幅駆動回路が含まれています。また、高精度な内部発振器と、20V電圧プログラム可能な定電流出力駆動も搭載しています。
主な特徴:
シングルNZR通信モードを採用しています。
内蔵の信号整形回路により、波形歪みが次のドライバに蓄積しないことを保証します。
自動整形伝送技術により、チップのカスケード接続数は信号伝送によって制限されず、信号伝送速度のみに依存します。
256階調の調整が可能で、スキャン周波数は2KHzです。
データは800Kbpsの速度で送信されます。
OUTR、G、B、Wポートの耐電圧は20V、DINポートの耐電圧は9Vです。
24V電源供給時でも、VDD PINに抵抗を追加するだけで済む内蔵電圧レギュレータを備えています。
リフレッシュレートが30fpsの場合、カスケード接続可能なピクセル数は少なくとも1024個です。
良好な色の一貫性と費用対効果を提供します。
アプリケーション:
LEDストリング、LEDストリップ、LEDモジュールなどのLEDフルカラー装飾照明に利用されます。
屋内/屋外LEDビデオまたは不規則なスクリーン、LEDピクセルライト、その他様々な種類のLED照明製品にも適用されます。
パッケージ:
WS2814Aには、SOP8とFSOP8の2種類のパッケージが利用可能です。
◇製品
WS2814A SOP8 4000/1R
WS2814A FSOP8 PN: WS2814F 4000/1R
リードタイム：約3週間
◇メーカーサイト
http://www.world-semi.com/
このカタログについて
| ドキュメント名 | Worldsemi ワールドセミ(中国) WS2814A データシート |
|---|---|
| ドキュメント種別 | 製品カタログ |
| ファイルサイズ | 650.8Kb |
| 登録カテゴリ | |
| 取り扱い企業 | 二松電気株式会社 (この企業の取り扱いカタログ一覧) |
この企業の関連カタログ
このカタログの内容
Page1
WS2814A
Signal line 256 Gray level 4-channel
Constant current LED driver IC
Feature
OUTR, G, B, W port withstand voltage 20V, DIN port withstand voltage 9V.
Built-in voltage-regulator, only a resistor needed to add to VDD PIN when under 24V power supply.
Built-in signal reshaping circuit, to ensure waveform distortion do not accumulate after wave reshaping to
the next driver.
Built-in electrify reset circuit and power-down reset circuit.
256 Gray-scale adjustable and scan frequency is 2KHz.
Cascading port transmission signal by single line.
Any two point the distance less than 2 meters transmission signal without any additional circuit.
Good color consistency and cost effective.
When the refresh rate is 30fps, the cascade number is at least 1024 pixels.
Send data at speed of 800Kbps.
Applications
LED full color decorative lighting, such as LED string, LED strip, LED module etc.
Indoor/outdoor LED video or irregular screen, LED pixel lights and other kinds of LED lighting products.
General description
WS2814A is a 4-channel LED control driver chip. Its internal includes intelligent digital port data latch and signal
reshaping amplification drive circuit. Also include a precision internal oscillator and a 20V voltage programmable
constant current output drive.
WS2814A adopts single NZR communication mode. After the chip power-on reset, the DIN port receive data from
controller, the first IC collect initial 32bit 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 IC through the DO port. After transmission for
each chip, the signal to reduce 32bit. IC adopt auto reshaping transmit technology, making the chip cascade number is
not limited the signal transmission, only depend on the speed of signal transmission.
The data latch of IC depend on the received 24bit data produce different duty ratio signal at OUTR, OUTG, OUTB
port. All chip synchronous send the received data to each segment when the DIN port input a reset signal. It will receive
new data again After the reset signal finished. Before a new reset signal received, the control signal of OUTR ,OUTG,
OUTB port unchanged. IC sent PWM data that received justly to OUTR, OUTG, OUTB port, after receive a low voltage
reset signal the time retain over 280μs.
There are SOP8 and FSOP8 packages available.
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Page2
WS2814A
Signal line 256 Gray level 4-channel
Constant current LED driver IC
PIN configuration
PIN function
NO. Symbol PIN Function description
1 OUTR LED Driver Output Output of RED PWM control
2 OUTG LED Driver Output Output of GREEN PWM control
3 OUTB LED Driver Output Output of BLUE PWM control
4 GND Ground Data & Power Grounding
5 DOUT Data Output Control data output
6 DIN Data Input Control data input
7 VDD Logical power supply IC power supply
8 OUTW LED Driver Output Output of WHITE PWM control
Absolute Maximum Ratings (TA=25℃, VSS=0V)
Parameter Symbol Ratings Unit
Power Supply Voltage VDD +3.7~+5.3 V
R/G/B/W Channel Output Port Withstand Voltage Vout 20 V
Logical Input Voltage VI VDD-0.7～VDD+0.7V V
Operation Temperature Topt -40～+85 ℃
Storage Temperature Range Tstg -40～+105 ℃
Electrostatic immunity ESD 4 KV
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WS2814A
Signal line 256 Gray level 4-channel
Constant current LED driver IC
Electrical Characteristics (TA=25℃, VDD=4.5～5.5V, VSS=0V)
Parameter Symbol Min Tpy Max Unit Conditions
R/G/B Low level output
IOL 15.5 16.5 17.5 mA
current
Low level output current Idout 10 —— —— mA Vo=0.4V, DOUT
Input current II —— —— ±1 µA VI=VDD/VSS
High level input VIH 0.7VDD —— —— V DIN
Low level input VIL —— —— 0.3 VDD V DIN
Hysteresis voltage VH —— 0.35 —— V DIN
Switching characteristics (TA=25℃, VDD=4.5～5.5V, VSS=0V)
Parameter Symbol Min Tpy Max Unit Condition
Transmission delay time TPLZ —— —— 300 ns CL=15pF, DIN→DOUT, RL=10KΩ
CL=300pF,
Fall time TTHZ —— —— 120 µs
OUTR/OUTG/OUTB/OUTW
Data transmission rate FMAX 600 —— —— Kbps Duty ratio 50%
Input capacity CI —— —— 15 pF ——
Data Transfer Time
T0H 0 code, high voltage time 220ns~380ns
T1H 1 code, high voltage time 580ns~1us
T0L 0 code, low voltage time 580ns~1us
T1L 1 code, low voltage time 580ns~1us
RES Frame unit, low voltage time >280µs
TDATA Data cycle ≥1.25µs
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WS2814A
Signal line 256 Gray level 4-channel
Constant current LED driver IC
Timing waveform diagram
Sequence Chart Cascade Method
D1 D2 D3 D4
DIN DO DIN DO DIN DO
IC 1 IC 2 IC 3
Data Transmission Method
Note: The data of D1 is send by MCU,and D2, D3, D4 through IC internal reshaping amplification to transmit.
Composition of 24bit Data
W W W W W W W W R R R R R R R R G G G G G G G G B B B B B B B B
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
Note: Data transmit in order of WRGB, high bit data at first.
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Page5
WS2814A
Signal line 256 Gray level 4-channel
Constant current LED driver IC
Typical Application Circuit
1. Supply voltage=5V (Each channel drives 1 LED)
2. Supply voltage=12V (Each channel drives 3 LEDs)
3. Supply voltage=24V (Each channel drives 6 LEDs)
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Page6
WS2814A
Signal line 256 Gray level 4-channel
Constant current LED driver IC
Package information
SOP8 Package
Dimensions In Millimeters Dimensions In Inches
Symbol
Min Max Min Max
A 1.350 1.750 0.053 0.069
A1 0.100 0.250 0.004 0.010
A2 1.350 1.550 0.053 0.061
b 0.330 0.510 0.013 0.020
c 0.170 0.250 0.006 0.010
D 4.700 5.100 0.185 0.200
E 3.800 4.000 0.150 0.157
E1 5.800 6.200 0.228 0.244
e 1.270 0.050
L 0.400 1.270 0.016 0.050
θ 0º 8º 0º 8º
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WS2814A
Signal line 256 Gray level 4-channel
Constant current LED driver IC
FSOP8 Package
Modify Records
Version № Status Bar Modify Content Summary Date Reviser Approved
V1.0 N New 20190410 Dong Le Shen JinGuo
V1.1 M Detailed parameters updated 20210118 Dong Le Shen JinGuo
V1.2 M Application circuits updated 20211125 Xie YanFan Yu XingHui
V1.3 M Added ESD 20220712 Hu Jin Yu XingHui
V1.4 M Added FSOP8 package 20230328 Hu Jin Yu XingHui
Remarks: 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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