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參數(shù)資料
| 型號： | SC1417BIMSTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | MicroPower, 620kHz PWM, Step-up DC/DC Converter |
| 中文描述： | 微功耗，620kHz PWM，降壓型DC / DC轉換器 |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 195K |
| 代理商： | SC1417BIMSTRT |
9
2006 Semtech Corp.
www.semtech.com
SC1417B
POWER MANAGEMENT
Typical Application Circuits
(1)
Figure 1 - Constant Brightness LED driver with 12V compliance from 2-cells (constant current output)
Inductor:
Falco P/N SDIP0302-156 (305) 622-9076
or
Coilcraft P/N DT1608C-153 (847) 639-6400
25 mA out (12V compliant)
LBO OUT
GND
LED,3.5V
R2
1M
R6
130k
GND
R5
33k
R4
L1
15uH
C3
2.2nF
C1
22uF,6.3V
C2
4.7uF,16V
VIN
R3
1M
C6
10nF
LED,3.5V
VOUT
D1
SMB5819
U1
SC1417B
8
1
2
3
4
5
6
7
LBO
COMP
FB
EN
GND
LX
IN
LBI
LED,3.5V
Figure 2 - Minimum Capacitance Boost Converter
VIN = 2V to 5V
C2
1uF,16V
R6
130k
LBO OUT
GND
C3
2.2nF
D1
SMB5819
R3
1M
R1
1.00M
GND
L1
15uH
C6
10nF
VOUT = 12V, 75mA
R2
1M
U1
SC1417B
8
1
2
3
4
5
6
7
LBO
COMP
FB
EN
GND
LX
IN
LBI
ENABLE
R4
115k
C1
10uF,6.3V
R5
33k
Note:
(1) Value of C1 depends on proximity of input source voltage and source impedance (use C1 > 47μF if the input
supply is greater than two inches from the SC1417B).
4
R
V
22
.
I
OUT
=
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