VB0503S-1W Shenzhen Sunyuan Technology Co., Ltd., VB0503S-1W Datasheet - Page 2

• Manufacturer Part Number: VB0503S-1W
• Description: Dc-dc Converter
• Manufacturer: Shenzhen Sunyuan Technology Co., Ltd.

Connecting DC-DC Converters in Series
Connecting DC-DC Converters in Parallel
Galvanic isolation of the output allows multiple converters to be connected in series simply by connecting the positive output of one
converter to the negative of another (see figure 1). In this way, non-standard voltage rails can be generated, however, the current
output of the highest output voltage converter should not be exceeded. When converters are connected in series, additional filtering is
strongly recommended as the converters switching circuits are not synchronized. As well as a summation of the ripple voltages, the
output could also produce relatively large beat frequencies. A capacitor across the output will help, as will a series inductor.
If the available power output from a single converter is inadequate for the application, then multiple converters can be paralleled to
produce a higher output power. However, it is not recommended to parallel converters to generate a higher power output, please
select our higher power output modules or contact us for a customized solution.
It should be noted that it is always preferable to parallel multiple converters of the same type. For instance, if a 2.5W converter is
required, then either 2pcs
is that the output voltages are not sufficiently well matched to guarantee that an AxxxxS-2W would supply twice as much as an
AxxxxS-1W
Even with paralleled converters of the same type, loading will be uneven, however, there is only likely to be around a 10% difference
in output load when the output voltages are well matched.
When connecting converter outputs, it should be remembered that the switching will not be synchronous, hence some form of
coupling should be employed. One possible solution is to use a diode feed, this is suitable mainly for 12V and 15V output types only
where the diode voltage drop (typically 0.6V) will not significantly affect the circuit functionality (see figure 2). With 5V and 9V
supplies the diode drop is generally too large to consider as a suitable means of connecting paralleled converters. This method also
PRODUCT LIST
Part Number
15:29
VB0503S-1W
VB0505S-1W
VB0512S-1W
VB1205S-1W
VB1212S-1W
VB1209S-1W
VB2405S-1W
VB2409S-1W
VB2412S-1W
VB0512D-1W
VB1205D-1W
VB2405D-1W
VB2409D-1W
Potting material
Packing material
Dimension (mm / inch)
Weight (g)
MTBF (Hrs)
Copyright @ Shenzhen Sunyuan Technology Co., Ltd.
and the situation would occur where there was only 1W being drawn from the
10.8-13.2
10.8-13.2
10.8-13.2
10.8-13.2
21.6-26.4
21.6-26.4
21.6-26.4
21.6-26.4
21.6-26.4
4.5-7.25
4.5-5.5
4.5-5.5
4.5-5.5
Range
AxxxxS-2W
Input Voltage (VDC)
should be used or 3 AxxxxS-1W, not an
Nominal
12
12
24
24
24
24
12
24
24
5
5
5
5
SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
Max.
7.25
7.25
7.25
16.0
16.0
16.0
30.0
30.0
30.0
7.25
16.0
30.0
16.0
Edition-SZSY-07-01
Max Current (mA)
SIP: 19.6*6.0*10(0.77*0.24*0.40)
200
200
111
200
111
200
200
111
84
84
84
84
DIP: 20.4*10*8.2(0.8*0.4*0.32)
200
Epoxy Resin UL94-V0
Output
AxxxxS-2W
VBXXXXS/D-1W DC-DC CONVERTER
>1,000,000
Voltage (VDC)
Tube
10
Printed in P.R.C January 2007
3.3
12
12
15
12
12
5
5
5
9
5
5
9
AxxxxS-2W
and an AxxxxS-1W. The reason for this
Efficiency
(%, Typ.)
and 1.5W from AxxxxS-1W.
68
67
72
64
68
68
68
66
77
72
69
68
68
Package
Page 2 of 4
DIP
DIP
DIP
DIP
SIP
SIP
SIP
SIP
SIP
SIP
SIP
SIP
SIP