SAMHOP SM6802, SM6803, SM6804 User Manual

SAMHOP Microelectronics Corp.
The information in this document is subject to change without notice. SAMHOP Microelectronics Corp. All Rights Reserved.
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台北縣新店市民權路1007 7F,No.100,Min-Chyuan Road, Hsintien, Taipei Hsien, Taiwan, R.O.C. TEL: 886-2-2218-3978/2820 FAX: 886-2-2218-3320 Email : info@samhop.com.tw
Ver1.0
三合微科股份有限公司
SAMHOP Microelectronics Corp.
LED DRIVER
SM6802/3/4是2到4bits的白光/藍光 Linear constant current LED Driver,在亮度的變化有16
steps可被同時或個別微調控制.它適合應用在手機,PDA,Smart phone的背光源,下圖所示為 SM6802/3/4 評估板應用電路圖.
表一.評估電路板零件清單
C1
C2~C3
D1 U1 U2 U3 U4 Y1
RESET
LED1~4
S1 1 搖頭開關,電源開關 S2 1 DIP SWITCH
J1 J2 J3
圖一.評估板應用電路
1 2 1 1 1
1 1 2R1~R2 100K Ώ,0805 1 4
1 1 1
10uF/16V,鉭質電容,1210
0.1uF,陶瓷電容,0805 蕭特基二極體,0805
HT48E06 , 8bits MCU SM6802
SM68031 SM6804
4MHz 振盪晶體
按鍵開關
SMD或DIP 封裝的LED
SM6802 跳線至 VDD SM6803 跳線至 VDD SM6804 跳線至 VDD
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