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FR9808 Datasheet(PDF) 7 Page - Fitipower Integrated Technology Inc.

Part No. FR9808
Description  21V, 4A, 500KHz Synchronous PWM-Buck DC/DC Converter
Download  13 Pages
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Maker  FITIPOWER [Fitipower Integrated Technology Inc.]
Homepage  http://www.fitipower.com/en_US/index.asp
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 7 page
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7
FR9808-1.3-OCT-2012
FR9808
85T
fitipower integrated technology lnc.
Typical Performance Curves (Continued)
VIN=12V, VOUT=1.2V, C1=22μF, C2=47μF, L1=1.8μH, TA=+25°C, unless otherwise noted.
IOUT=0A
2
μs/div.
IOUT=4A
2
μs/div.
Figure 10. DC Ripple Waveform
Figure 11. DC Ripple Waveform
IOUT=0A
4
00μs/div.
IOUT=4A
400μs/div.
Figure 12. Startup Through Enable Waveform
Figure 13. Startup Through Enable Waveform
IOUT=0A
2ms/div.
IOUT=4A
40μs/div.
Figure 14. Shutdown Through Enable Waveform
Figure 15. Shutdown Through Enable Waveform
VIN
20mV/div.
VOUT
20mV/div.
IL
2A/div.
VSW
5V/div.
VIN
200mV/div.
VOUT
20mV/div.
IL
2A/div.
VSW
5V/div.
VEN
5V/div.
VOUT
500mV/div.
VSW
5V/div.
VEN
5V/div.
VOUT 500mV/div.
VSW
5V/div.
VEN
5V/div.
VOUT 500mV/div.
IL
2A/div.
VSW
5V/div.
VEN
5V/div.
VOUT 500mV/div.
IL
2A/div.
VSW
5V/div.




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