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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(zhuǎn)換器 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大小： | 195K |
| 代理商： | SC1417BIMSTRT |
8
2006 Semtech Corp.
www.semtech.com
SC1417B
POWER MANAGEMENT
Typical Characteristices (Cont.)
2-Cell to 5V Converter
Efficiency
40
50
60
70
80
90
1
10
100
1000
Load current (mA)
E
Vin 3.0V
Vin 2.2V
Vin 1.65V
Scope plot of Boost Converter waveforms in Constant Brightness LED driver
Vin = 3V, Vout = 11.9V, Iout = 40mA, L = 15uH
Cin = 10uF, 6.3V tant. Cout = 1uF, ceramic, (see above schematic for other components used)
Ch1: Switching Node, Ch2: Vout ripple, Ch4: Current in inductor, (100mA/div)
Inductor current ripple = 170mA pk-pk
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