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參數(shù)資料
| 型號(hào)： | SC614EVB |
| 廠商： | Semtech Corporation |
| 英文描述： | Low Noise Backlight and Flash Driver With Serial Interface |
| 中文描述： | 低噪聲背光和閃光串行接口驅(qū)動(dòng)程序 |
| 文件頁(yè)數(shù)： | 17/25頁(yè) |
| 文件大?。?/td> | 395K |
| 代理商： | SC614EVB |
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2006 Semtech Corp.
POWER MANAGEMENT
Application Examples (Cont.)
SC614
United States Patent No. 6,504,422
www.semtech.com
17
Main Backlight Plus Sub-Backlight
D1
LED
C2
1u
434mA Max (500ms)
D2
LED
D3
LED
D4
LED
D5
LED
32mA Max
32mA Max
32mA Max
32mA Max
C1
2u2
C3 1u
C4 1u
VIN
11
VIN
17
EN
2
SDA
7
SCL
8
ASEL
5
SDIM
3
MDIM
4
FL
6
VOUT
9
VOUT
16
M1
1
M2
24
M3
23
M4
22
S1/FL3
20
S2/FL2
19
S3/FL1
18
GND
12
GND
21
T
C
1
C
1
C
1
C
1
U1
SC614
EN
SCL
SDA
FL
SDIM
MDIM
VBAT
R1
Pull-up
R2
Pull-up
VLOGIC
Note: R1 and R2
pull-up resistors are a
requirement of the I2C
specification
SUB BACKLIGHT
MAIN BACKLIGHT
102mA Max
102mA Max
102mA Max
D6
LED
D7
LED
328mA Max Continuous
Features:
Up to 4 LED main backlight with up to 32mA per LED
PWM dimming of main backlight using MDIM pin
Up to 3 LED sub-backlight with up to 32mA per LED
PWM dimming of sub-backlight using SDIM pin
Register Settings (20mA backlight currents used as an example):
0x00: set to 0x7F to enable all 7 current sinks for use (or as needed if less)
0x01 through 0x07: set to 0x32 for 20mA per current sink
0x08: set to 0x00 for Flash Mode disabled (FL pin inactive) and 250kHz charge pump frequency
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