DC/DC Conve rte r
A_S-1W(E)R2 & B_LS-1W(E)R2 Se rie s
Effic ie nc y Vs Input Volta g e (Full loa d )
Effic ie nc y Vs Output Loa d (Vin=5V)
100
100
90
80
70
60
50
40
30
20
10
0
95
90
85
80
75
70
65
60
55
50
A0505S-1WR2
A0505S-1WR2
10 20 30 40 50 60 70 80 90 100
Outp ut Curre nt Pe rce nta ge (%)
Inp ut Vo lta g e (V)
Effic ie nc y Vs Output Loa d(Vin=12V)
Effic ie nc y Vs Inp ut Vo lta ge (Full Lo a d )
100
100
95
90
85
90
80
70
60
50
40
30
20
10
0
A2415S-1WR2
A2415S-1WR2
80
75
70
65
60
55
50
10 20 30 40 50 60 70 80 90 100
Outp ut Curre nt Pe rc e nta g e (%)
Input Vo lta g e (V)
De sig n Re fe re nc e
1. Typ ic a l a p p lic a tion
If it is re q uire d to furthe r re d uc e inp ut a nd outp ut rip p le , a filte r c a p a c itor c a n b e c onne c te d to the inp ut a nd output te rmina ls, se e Fig .3.
More ove r, c hoosing suita b le filte r c a p a c itor is ve ry imp orta nt, sta rt-up p roble ms ma y b e c a use d b y too la rg e c a p a c ita nc e . To e nsure d
the mod ule s running we ll, the re c omme nd e d c a p a c itive loa d va lue s a s shown in Ta b le 1.
Re c omm e nd e d c a p a c itive loa d va lue ta b le (Ta b le 1)
Dual Output
Vin
Cin
Sing le Vout Cout Dua l Vout
Cout
+Vo
0V
Vin
(VDC)
(µF)
(VDC)
(µF)
(VDC)
(µF)
Cout
Cout
Cin
DC
DC
3.3/5
4.7
3.3/5
10
±3.3/ ±5
4.7
GND
-Vo
9/12
15
2.2
2.2
1
9/12
15/24
--
2.2
1
±9/±12
±15/±24
--
1
0.47
--
Single Output
Vin
+Vo
0V
24
--
Cout
Cin
DC DC
GND
It is not re c omme nd e d to c onne c t a ny e xte rna l c a p a c itor whe n
outp ut p owe r is le ss tha n 0.5W.
Fig .3
2. EMC typ ic a l re c omme nd e d c irc uit (CLASS B)
Inp ut volta g e (V)
C1
3.3/5/9/12/15/24
4.7µF /50V
LDM
Vin
Vin
+Vo
EMI
C2
Re fe r to the Cout in Fig .3
6.8µH
DCDC
LOAD
C1
C2
LDM
GND
GND
-Vo
(0V)
Fig . 4
2014.03.03-A/3
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