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L6739 데이터시트(PDF) 26 Page - STMicroelectronics

부품명 L6739
상세설명  CPU and DSP power supply
PDF  30 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6739 데이터시트(HTML) 26 Page - STMicroelectronics

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Application information
L6739
26/30
DocID026384 Rev 1
10.3
Input capacitors
The input capacitor bank is designed considering mainly the input RMS current that
depends on the output deliverable current (IOUT) and the duty cycle (D) for the regulation as
follows:
Equation 18
The equation reaches its maximum value, IOUT / 2, with D = 0.5. The losses depend on the
input capacitor ESR and, in the worst case, are:
Equation 19
Irms
IOUT
D1 D
–

=
PESR
IOUT 2

2
=



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