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AN4345 Datasheet(PDF) 12 Page - STMicroelectronics

Part # AN4345
Description  This document describes a two output buck with the VIPer16LD
PDF  28 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4345 Datasheet(HTML) 12 Page - STMicroelectronics

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Board testing
AN4345
12/28
DocID025078 Rev 1
The ripple at the switching frequency, superimposed to the output voltage VOUT1, has also
been measured and it is shown in figures below at maximum load and nominal input
voltages.
Figure 11. Line regulation
(external biasing, Iout2 = 0 mA)
Figure 12. Line regulation
(external biasing, Iout2 = 50 mA)
11.2
11.4
11.6
11.8
12
12.2
12.4
12.6
12.8
13
80
105
130
155
180
205
230
255
Vin[V]
0
25%
50%
75%
100%
AM13816V1
AM13817V1
11.2
11.4
11.6
11.8
12
12.2
12.4
80
105
130
155
180
205
230
255
Vin[V]
0
25%
50%
75%
100%
Figure 13. Load regulation
(external biasing, Iout2 = 0 mA)
Figure 14. Load regulation
(external biasing, Iout2 = 50 mA)
AM13818V1
11.6
11.8
12
12.2
12.4
12.6
12.8
13
0
0.05
0.1
Iout[A]
90
115
230
265
AM13819V1
11.6
11.8
12
12.2
12.4
12.6
12.8
13
0
0.05
0.1
Iout[A]
90
115
230
265
Figure 15. Output voltage ripple at max.
load 90 VAC
Figure 16. Output voltage ripple at max.
load 265 VAC



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