VHB75-D12-S3R3 CUI Inc, VHB75-D12-S3R3 Datasheet - Page 4

• Manufacturer Part Number: VHB75-D12-S3R3
• Description: CONVERTER DC/DC 3.3V OUT 49.5W
• Manufacturer: CUI Inc
• Series: V-Infinity VHB75r
• Type: Isolatedr

Specifications of VHB75-D12-S3R3

• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 75W
• Mounting Type: Through Hole
• Voltage - Input: 9 ~ 18V
• Package / Case: 9-DIP Module
• 1st Output: 3.3 VDC @ 15A
• Size / Dimension: 2.40" L x 2.28" W x 0.50" H (61mm x 57.9mm x 12.7mm)
• Power (watts) - Rated: 49.5W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 78%
• Approvals: cUL, TUV, UL
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -
• Other names: 102-1255

PART NUMBER: VHB75
2. 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 (VHB75-Q48-S5) by 8% to 5.4V, R
Table 1. For example, to trim-up the output voltage of 5.0V
Table 1
Where: R
nominal output voltage. V
R
R
1
trim-up
and R
20050 SW 112
FIGURE 3: TRIM-UP VOLTAGE SETUP
trim-up
FIGURE 2. TRIMMING WITH
EXTERNAL POTENTIOMETER
R
The value of R
2
trim-up
are internal to the unit and are defined in
+Vin
-Vin
=
is the external resistor in K Ω . V
V - V
o
2.5V
3.3V
12V
15V
24V
5V
R1 - R2 x (V - V
=
o, nom = 5.4 - 5.0 = 0.4 V
th
Trim-Up
5.8 - 8.25 x 0.4
as follows:
R1 = 5.8 KΩ
R2 = 8.25 KΩ
Ave. Tualatin, Oregon 97062
o
trim-up
V - V
is the desired output voltage.
0.4
o
Trim
+Vo
-Vo
+S
19.656
25.474
42.215
-S
3.168
2.877
5.8
is defined as:
o, nom
o
Ω
= 6.25 (KΩ)
o, nom
13.304
16.923
trim-up
14.76
8.25
8.25
7.2
R trim-up
Ω
is calculated
o,nom
+Vin
-Vin
)
(KΩ)
is the
R load
phone
phone [phone] fax
Trim
+Vo
DESCRIPTION: dc-dc converter
-Vo
+S
-S
module (VHB75-Q48-S5) by 8% to 4.6V, R
Where: R
Table 2. For example, to trim-up the output voltage of 5.0V
Table 2
R
nominal output voltage. V
trim-down
R
1
andR
FIGURE 4: TRIM-DOWN VOLTAGE SETUP
trim-down
10KΩ
Trimpot
R
The value of R
trim-down
2
are internal to the unit and are defined in
+Vin
-Vin
fax [phone]
V
=
is the external resistor in K Ω . V
o, nom
2.5V
3.3V
12V
15V
24V
5V
=
Trim-Down
R load
R1 - R2 x (V
- V
R1 = 5.8 KΩ
R2 = 10.57 KΩ
as follows:
5.8 - 10.57 x 0.4
o
trim-down
o
= 5.0 - 4.6 = 0.4 V
Trim
is the desired output voltage.
V
+Vo
-Vo
0.4
o, nom
+S
-S
86.45
2.923
6.18
150
430
5.8
is defined as:
Ω
o, nom
= 3.93 (KΩ)
- V
trim-down
rev.
page
date
10.57
10.57
60.1
130
15
94
o
R trim-down
Ω
- V )
05/2009
is calculated
o,nom
4 of 6
o
(KΩ)
is the
R load