Data Sheet

GAPTEC-Electronic GmbH & Co. KG
[e-mail] – www.gaptec-electronic.com
Page 4 of 5
1S7E_1.5UP – Rev. 2017-2.2
Specifications subject to change without notice.
1W - Dual/Single Output DC-DC Converter - Fixed Input - Isolated & Unregulated
1S7E_1.5UP Series
Typical application
EMC typical recommended circuit (Class B)
If it is required to further reduce input and output ripple, a filter capacitor
can be connected to the input and output terminals, see Fig. 1.
Moreover, choosing a suitable filter capacitor is very important, start-up
problems may be caused by too large capacitance. To ensure the modules
are running well, see the recommended capacitive load values as shown
in Table 1.
Output load requirements
In order to ensure the converter can work reliably with high efficiency, the
minimum load should not less than 10% rated load when it is used. If the
needed power is indeed small, please parallel a resistor on t the output
side (The sum of the efficient power and resistor consumption power is not
less than 10%).
Vin
(VDC)
Cin
(µF)
Single
output
(VDC)
Cout
(µF)
Dual
output
(VDC)
Cout
(µF)
3.3/5 4.7 3.3/5 10 ±3.3/±5 4.7
9/12 2.2 9/12 2.2 ±9/ ±12 1
15 2.2 15/24 1 ±15/±24 0.47
24 1 - - - -
It is not recommended to connect any external capacitor when
output power is less than 0.5W.
Figure 1