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A6727 Datasheet(PDF) 24 Page - STMicroelectronics

Part # A6727
Description  Adjustable output voltage
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A6727 Datasheet(HTML) 24 Page - STMicroelectronics

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Application information
A6727
24/29
DocID025003 Rev 1
10.3
Input capacitors
The input capacitor bank is designed mainly to stand input RMS current, which depends on
the output current (IOUT) and duty cycle (D) for the regulation as follows:
Equation 13
The equation reaches its maximum value, IOUT/2, when D = 0.5. Losses depend on the
input capacitor ESR:
Equation 14
I
rms
I
OUT
D1
D
–
()
⋅
⋅
=
PESR I
rms
2
⋅
=



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