VHK100W-Q48-S3R3 CUI Inc, VHK100W-Q48-S3R3 Datasheet - Page 6

• Manufacturer Part Number: VHK100W-Q48-S3R3
• Description: CONVERTER DC/DC 3.3V 20A 66W
• Manufacturer: CUI Inc
• Series: V-Infinity VHK100Wr
• Type: Isolatedr

Specifications of VHK100W-Q48-S3R3

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 100W
• Mounting Type: Chassis Mount
• Voltage - Input: 18 ~ 75V
• Package / Case: Module
• 1st Output: 3.3 VDC @ 20A
• Size / Dimension: 4.23" L x 4.01" W x 1.50" H (107.5mm x 101.8mm x 38mm)
• Power (watts) - Rated: 66W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 79%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Other names: 102-1813

PART NUMBER: VHK100W
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 (VHK100W-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
Where: R
2
, R
20050 SW 112
3
Table 1
, V
R
r
, and V
FIGURE 4: TRIM-UP VOLTAGE SETUP
trim-up
trim-up
FIGURE 3. TRIMMING WITH
EXTERNAL POTENTIOMETER
The value of R
R
+Vin
-Vin
trim-up
is the external resistor in K Ω . V
f
are internal to the unit and are defined in
V - V
o
th
=
=
o, nom = 5.4 - 5.0 = 0.4 V
Ave. Tualatin, Oregon 97062
Trim-Up
as follows:
o
5.8 - 3.3 x 0.4
R1 = 5.8 KΩ
R2 = 3.3 KΩ
3.3V
12V
15V
24V
28V
48V
R1 - R2 x (∆V)
is the desired output voltage. R
5V
trim-up
0.4
Trim
+Vo
-Vo
+S
-S
∆V
is defined as:
19.656
25.474
= 11.2 (KΩ)
3.168
42.33
48.78
74.25
5.8
Ω
R trim-up
trim-up
13.304
(KΩ)
14.76
16.67
5.954
13.3
7.2
8.2
o,nom
+Vin
-Vin
Ω
is calculated module (VHK100W-Q48-S5) by 8% to 4.6V, R
is the
phone
phone [phone] fax
R load
1
,
Trim
+Vo
DESCRIPTION: chassis mount dc-dc converter
-Vo
+S
-S
nominal output voltage. V
Where: R
Table 1. For example, to trim-up the output voltage of 5.0V
R
Table 2
2
R
, and V
FIGURE 5: TRIM-DOWN VOLTAGE SETUP
trim-down
trim-down
10KΩ
Trimpot
The value of R
R
fax [phone]
r
trim-down
+Vin
-Vin
are internal to the unit and are defined in
is the external resistor in K Ω . V
V
o, nom
=
Trim-Down
=
R load
- V
as follows:
R1 = 5.8 KΩ
R2 = 5.32 KΩ
o
5.8 - 5.32 x 0.4
3.3V
12V
15V
24V
28V
48V
5V
trim-down
o
is the desired output voltage. R
R1 - R2 x (∆V)
= 5.0 - 4.6 = 0.4 V
Trim
+Vo
-Vo
0.4
+S
-S
∆V
is defined as:
www.v-infinity.com
86.45
608.6
1638
6.18
150
430
5.8
= 9.18 (KΩ)
Ω
page
date
trim-down
R trim-down
10.52
173.7
60.1
120
306
15
94
(KΩ)
08/2009
o,nom
6 of 10
Ω
is calculated
is the
R load
1
,