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AN2870 Datasheet(PDF) 20 Page - STMicroelectronics

Part # AN2870
Description  L6585DE combo IC
PDF  41 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2870 Datasheet(HTML) 20 Page - STMicroelectronics

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Designing with L6585DE
AN2870
20/41
4
Designing with L6585DE
Figure 12.
Typical application
4.1
PFC stage design
Output voltage and dynamic OVP
Output voltage is set designing a voltage divider connected to INV pin:
Equation 2
The maximum output voltage is set designing a voltage divider connected to CTR pin:
Equation 3
Both RINV,Hi and RCTR,Lo should be composed by a suitable number of resistors placed in
series in order to increase the reliability of the application against over-voltages.
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
+
⋅
=
Lo
,
INV
Hi
,
INV
OUT
R
R
1
V
52
.
2
V
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
+
⋅
=
Lo
,
CTR
Hi
,
CTR
MAX
,
OUT
R
R
1
V
4
.
3
V



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