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VHK75W-Q48-S5 Datasheet(PDF) 8 Page - CUI INC

Part # VHK75W-Q48-S5
Description  DC-DC CONVERTER
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Manufacturer  CUI [CUI INC]
Direct Link  http://www.cui.com
Logo CUI - CUI INC

VHK75W-Q48-S5 Datasheet(HTML) 8 Page - CUI INC

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CUI Inc
│ SERIES: VHK75W │ DESCRIPTION: DC-DC CONVERTER
date 12/16/2013
│ page 8 of 9
APPLICATION NOTES
1. Output Voltage Trimming
Leave open if not used.
Table 5
Vout
(Vdc)
R1
(KΩ)
R2
(KΩ)
R3
(KΩ)
Vr
(V)
Vf
(V)
3.3
3
12
18
1.24
0.46
5
2.32
8.2
0
2.5
0
12
9.1
51
18
2.5
0.46
15
12
82
18
2.5
0.46
24
20
100
20
2.5
0.46
48
36
270
14
3.085 1.15
+Vin
R trim-up
R-Load
Trim
+Vo
+Sense
+Sense
-Sense
-Sense
-Vin
-Vo
Trim up
+Vin
-Vin
-Vo
+Vo
R trim-down
R-Load
Trim
Trim down
R1(Vr - Vf (
))
Rtrim - up = (
) -
(K)
Rtrim - down =
- R2 (K)
Vo - Vo, nom
R2
R2 + R3
R2 + R3
R2R3
R1(Vo - Vr)
Vo, nom - Vo
Note: R
trim-up is the external resistor in KΩ
R
trim-down is the external resistor in KΩ
V
O, nom is the nominal output voltage
V
O is the desired output voltage
R1, R2, R3, and Vr are internal (see Table 5).
Figure 7
Formula for Trim Resistor
Application Circuit for Trim pin
Note:
1. All specifications are measured at Ta=25°C, nominal input voltage and full output load unless otherwise specified.
For more information, please visit the product page.


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