VYB20W-Q24-S24 CUI Inc, VYB20W-Q24-S24 Datasheet - Page 5

• Manufacturer Part Number: VYB20W-Q24-S24
• Description: CONVERTER DC/DC 20W 24V 834MA
• Manufacturer: CUI Inc
• Series: V-Infinity VYB20Wr
• Type: -r

Specifications of VYB20W-Q24-S24

• Voltage - Input (min): 9V
• Voltage - Input (max): 36V
• Number Of Outputs: 1
• Power (watts) - Manufacture Series: 20W
• Power (watts) - Max: 20W
• 1st Output: 24 VDC @ 834mA
• 2nd Output: -
• 3rd Output: -
• Voltage - Isolation: 1.5kV (1500V)
• Mounting Type: Through Hole
• Package / Case: 6-DIP Module
• Size / Dimension: 2.00" L x 1.00" W x 0.44" H (50.8mm x 25.4mm x 11.2mm)
• Operating Temperature: -45°C ~ 85°C
• Efficiency: 88%
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

CUI Inc │ SERIES: VYB20W │ DESCRIPTION: DC-DC CONVERTER
1.
2.
3. Trim Application and Trim Resistance (Single Output Models)
APPLICATION NOTES
Application circuit for TRIM (Part in broken line is the interior of models)
Requirement on Output Load
In order to ensure the product operates effi ciently and reliably, make sure the specifi ed range of input voltage is not exceeded and the
minimum output load is not less than 10% load. If the actual load is less than the specifi ed minimum load, the output ripple may
increase sharply while its effi ciency and reliability will reduce greatly. If the actual output power is very small, please add an
appropriate resistor as extra loading.
Recommended Circuit
The VYB20W series has been tested according to the following recommended testing circuit. This series should be tested under load.
(see Figure 1)
If you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR. If
the capacitance is too big, a startup problem might arise. The maximum allowable capacitance to ensure safe and reliable operation is
listed in Table 1.
Figure 1
+Vo
0V
Trimup
V
R
R
ref
1
2
R
3
G ND
Single Output
Vin
R
T
C i n
Trim
DC
+Vo
Table 1
0V
Trimdown
V
DC
R
R
ref
1
2
R
C o u t
3
Single Vout
(Vdc)
R
3.3
12
15
24
5
T
+Vo
0V
Trim
cui.com
Formula for trim resistance
Cout
(μF)
470
470
220
220
100
Note: Value for R1, R2, R3, and Vref refer to the following table.
Vo’: Trim up/down voltage.
R
a: User-defined parameter, no actual meaning.
T
: Trim resistance
Resistance
(μF)
100
100
100
100
100
down:
Cin
R1 (KΩ)
R2 (KΩ)
R3 (KΩ)
Vref (V)
Dual Output
GND
Vin
up:
Vo
Dual Vout
R =
R =
C in
(Vdc)
T
±12
±15
±24
±5
--
3.3 (Vdc)
R -a
R -a
aR
aR
4.801
2.863
1.24
15
2
1
1
2
DC
±220
±100
±100
Cout
(μF)
--
-R
-R
3
3
5 (Vdc)
DC
2.883
2.864
2.5
10
(μF)
100
100
100
100
100
Cin
C out
C out
a=
a=
12 (Vdc)
date 06/27/2011 │ page 5 of 6
10.971
2.864
17.8
Vo’-Vref
Vo’-Vref
2.5
Vref
Vref
+Vo
-Vo
0V
15 (Vdc)
14.497
2.864
17.8
R
R
2.5
1
2
24 (Vdc)
24.872
2.864
2.5
20