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SC6803 Datasheet(PDF) 6 Page - SHENZHEN FUMAN ELECTRONICS CO., LTD. |
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SC6803 Datasheet(HTML) 6 Page - SHENZHEN FUMAN ELECTRONICS CO., LTD. |
6 / 14 page ![]() 深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC6803(文件编号:S&CIC0807) LED 驱动 IC 第 6 页 共 14 页 内恒流驱动模式 该模式(OMODE = 高电平或悬空)适用的情况与上个模式基本一致,只是在 FBX 端多了一个调节电流的 RX,这时流过 LED 的电流完全由 RX 决定:ILED ≈ 0.7V/RX ILED-RX 曲线图 注意导通后输出口的对地电压 VOUT 必须在 1.1-6V 之间才能保持恒流状态,即满足:VLED + 6V = ILED * RL ≥ V DD ≥ VLED + 1.1V + ILED * RL 电路参数取值还必须注意耗散功率 PD 不会超过其最大值。 PD = ILED1 *(VOUT1 – 0.7V)+ ILED2 *(VOUT2 – 0.7V)+ ILED3 *(VOUT3 – 0.7V)+PIC 1 2 3 4 5 6 A B C D 6 5 4 3 2 1 D C B A Titl e Nu mber Rev i sio n Size B Dat e: 3 0-Apr-2 0 10 Sheet o f File: D:\HMF\资料\资料电路图\SC6 08 3 .d db Drawn By: OUT1 OUT2 OUT3 VCC VOUT FB1 FB2 FB3 GND OUT1 OUT2 OUT3 VCC VOUT FB1 FB2 FB3 GND VCC DW (6V) DIN DCLK DCLK DCLKO DOUT DIN VCC RL VDD(5-12V) RX |
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