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VIPER20A-E Scheda tecnica(PDF) 18 Page - STMicroelectronics

Il numero della parte VIPER20A-E
Spiegazioni elettronici  SMPS primary I.C.
PDF  34 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VIPER20A-E Scheda tecnica(HTML) 18 Page - STMicroelectronics

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Operation description
VIPer20A-E
18/34
Figure 14. Oscillator
Rt
Ct
OSC
VDD
CLK
FC00050
Ct
Fsw
40kHz
15nF
22nF
Forbidden area
Forbidden area
Ct(nF) =
Fsw(kHz)
880
1
2
3
5
10
20
30
50
30
50
100
200
300
500
1,000
Rt (k
Ω)
Oscillator frequency vs Rt and Ct
Ct = 1.5 nF
Ct = 2.7 nF
Ct = 4.7 nF
Ct = 10 nF
FC00030
FC00030
For Rt > 1.2kΩ and Ct ≤40KHz



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