VHK50W-Q24-S28 CUI Inc, VHK50W-Q24-S28 Datasheet - Page 6

• Manufacturer Part Number: VHK50W-Q24-S28
• Description: CONVERTER DC-DC 28V 1.78A 50W
• Manufacturer: CUI Inc
• Series: V-Infinity VHK50Wr
• Type: Isolatedr

Specifications of VHK50W-Q24-S28

• Output: 28V
• Number Of Outputs: 1
• Power (watts): 50W
• Mounting Type: Chassis Mount
• Voltage - Input: 9 ~ 36V
• Package / Case: Module
• 1st Output: 28 VDC @ 1.78A
• Size / Dimension: 4.23" L x 4.01" W x 1.50" H (107.4mm x 101.9mm x 38.1mm)
• Power (watts) - Rated: 50W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 82%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Other names: 102-2020

PART NUMBER: VHK50W
9. OUTPUT TRIMMING (OPTIONAL)
The output voltages are preset to nominal values as indicated by the models table at the factory. If desired, the output voltage may
optionally be trimmed to a different value (+/- 10%) with external resistors and/or potentiometer as shown below.
To trim the output voltage with fixed resistors, the output voltage can be calculated as follows.
module (VHK50W-Q48-S5) by 8% to 5.4V, R
nominal output voltage. V
R
Table 1. For example, to trim-up the output voltage of 5.0V
Table 1
Where: R
2
, R
R
20050 SW 112
trim-up
3
, V
r
, and V
FIGURE 4: TRIM-UP VOLTAGE SETUP
trim-up
FIGURE 3. TRIMMING WITH
EXTERNAL POTENTIOMETER
The value of R
+Vin
-Vin
R
=
is the external resistor in K Ω . V
trim-up
f
are internal to the unit and are defined in
V - V
3.3V
12V
15V
24V
28V
48V
o
th
5V
R1 - R2 x (V - V
=
Ave. Tualatin, Oregon 97062
o, nom = 5.4 - 5.0 = 0.4 V
Trim-Up
as follows:
o
5.8 - 3.3 x 0.4
R1 = 5.8 KΩ
R2 = 3.3 KΩ
is the desired output voltage. R
trim-up
V - V
o
0.4
Trim
+Vo
-Vo
18.945
25.189
25.189
3.168
608.6
74.25
5.8
is defined as:
o, nom
o
Ω
= 11.2 (KΩ)
o, nom
6.977
173.7
4.636
7.191
13.3
7.2
3.3
trim-up
R trim-up
Ω
o,nom
+Vin
-Vin
)
is calculated
(KΩ)
is the
phone
phone [phone] fax
R load
1
,
Trim
+Vo
DESCRIPTION: chassis mount dc-dc converter
-Vo
+S
-S
module (VHK50W-Q48-S5) by 8% to 4.6V, R
nominal output voltage. V
Where: R
Table 1. For example, to trim-up the output voltage of 5.0V
Table 2
R
trim-down
R
2
, and V
FIGURE 5: TRIM-DOWN VOLTAGE SETUP
trim-down
10KΩ
Trimpot
The value of R
fax [phone]
R
r
+Vin
-Vin
are internal to the unit and are defined in
trim-down
=
is the external resistor in K Ω . V
V
3.3V
12V
15V
24V
28V
48V
o, nom
5V
Trim-Down
R load
R1 - R2 x (V
=
as follows:
- V
o
R1 = 5.8 KΩ
R2 = 5.32 KΩ
5.8 - 5.32 x 0.4
trim-down
is the desired output voltage. R
o
= 5.0 - 4.6 = 0.4 V
Trim
V
+Vo
-Vo
0.4
o, nom
86.45
608.6
1638
6.18
150
430
5.8
is defined as:
Ω
www.v-infinity.com
o, nom
= 9.18 (KΩ)
- V
173.7
5.32
60.1
120
page
date
306
trim-down
15
68
o
R trim-down
Ω
- V )
08/2009
o,nom
6 of 11
o
is calculated
(KΩ)
is the
R load
1
,