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L7985 датащи(PDF) 36 Page - STMicroelectronics

номер детали L7985
подробное описание детали  Voltage feed-forward
PDF  42 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7985 датащи(HTML) 36 Page - STMicroelectronics

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L7985
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DocID022446 Rev 7
VCC and GND (38 V). Therefore, if the output is -5 V, the input voltage can range from 4.5 V
to 33 V.
As in the positive buck-boost, the maximum output current according to application
conditions is shown in Figure 37. The dashed line considers a more accurate estimation of
the duty cycles given by Equation 44, where power losses across diodes and the internal
power MOSFET are taken into account.
Equation 44
Figure 37. Maximum output current according to switch max. peak current (2.0 A):
VO = - 5 V
D
VOUT VD
–
V
– IN VSW VOUT VD
–
+
–
-----------------------------------------------------------------
=



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