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AN2816 датащи(PDF) 32 Page - STMicroelectronics

номер детали AN2816
подробное описание детали  High-efficiency step-down controller
PDF  36 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2816 датащи(HTML) 32 Page - STMicroelectronics

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PM6675S demonstration tests
AN2816
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10.9
VOUT current limit
The valley current limit avoids any high-side turn-on if the inductor current is higher than the
programmed value. This current limit can be designed with the following equation:
Equation 2
The current sensing is performed by comparing the voltage drop in the low-side MOSFET,
during the TOFF period, with the voltage drop given by an injected current and the current
limit resistor.
Figure 32.
VOUT current limit protection during a load transient (0 A to 9 A at
2.5 A/
µs, valley current limit programmed at about 9 A (RILIM = 1 kΩ)
pulse-skip mode
I
CL
100
µAR
ILIM
⋅
R
LS DS on
()
,
-------------------------------------
=
AM01031v1



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