10 WATT
DC-DC
CONVERTER
OBS-SC/WC series
General Description
Features
1.PCB Mountable
2. Small , Light Weight
3. High Efficiency
4. Cost effective
5. Output Voltage adjustable
6. Over Voltage Protection
In response to market demand for “DISTRIBUTED
POWER,” ETA has developed a new DC/DC converter
suitable for PCB mounting. OB-Series AC/DC Switching
Power Supplies are designed and built to be installed
right onto the user’s printed circuit board like a piece of
“patch-work”. They are small, light in weight and cost
effective.
ETA-USA
Sub.ETA ELECTRIC IND., CO. LTD.
16170 Vineyard Blvd. #180
Morgan Hill, CA 95037
Phone: (408) 778-2793 Fax: (408) 779-2753
www.eta-usa.com
S p e c ific a tio n s
O B S * * S C /W C 1 2
1 0 W A T T S /S IN G L E /2 O U T P U T
In p u t V o lta g e
D C [V ]
In p u t R a n g e
D C [V ]
In r u s h C u r r e n t
[A ]
In p u t R a n g e
a t n o lo a d [m A ]( ty p ic a l)
a t fu ll lo a d [m A ]( ty p ic a l)
L in e B a c k N o is e [m V p - p ] ( ty p ic a l)
E ffic ie n c y [% ] ( ty p ic a l) *1
O u tp u t V o lta g e [V ]
O u tp u t C u r r e n t [A ]
V o lt a g e To le ra n c e + / -[ m V ] (m a x im u m ) * 2
M ode l
O BS05SC 12
OBS12SC 12
12
12
OBS15SC 12 OBS24SC 12 OBS22WC 12
12
12
OBS23WC 12
12
12
42
1046
500
86
24
0 .4 5
480
44
1097
500
82
+1 2
-12
0 .0 4 5 - 0 .4 5
240
240
47
1041
500
84
+1 5
-15
0 .0 3 5 - 0 .3 5
300
300
120
100
120
60
200
±1500
±750
±60
75
300
±1500
±750
±75
8-18
N o t s p e c ifie d
32
1042
500
80
5
2
100
37
1097
500
82
12
0 .9
240
39
1040
500
84
15
0 .7 0
300
100
Rip p le a n d No is e [ m V p -p ] (m a x im u m ) * 3
R e g u la tio n
a . S t a t ic L in e R e g u la t io n [ m V ] (m a x im u m )
b.D y nam ic Line R egulation + /- [m V ]( m ax im um ) *4
c .S tatic Load R egulation [m V ]( m ax im um ) *5
[m V ]( m ax im um )
*6
[m V ]( m ax im um )
*7
d .T e m p e r a tu r e C o e ffic ie n t *8
e .D r ift[m V ]( m a x im u m ) *9
f.D y nam ic Load R egulation [m V ]( m ax im um ) *10
g .R e c o v e r y T im e *4 ,*1 0
R is e u p tim e
H o ld u p tim e
O v e r c u r r e n t P r o te c tio n
O v e r v o lta g e P r o te c tio n
R e m o te S e n c e
T r im m in g o f o u tp u t v o lta g e [m V ] *1 1
[m V ] *1 2
In p u t F u s e
O p e r a tin g T e m p e r a tu r e
( d e r a tin g )
O p e r a tin g H u m id ity
S to r a g e T e m p e r a tu r e
S to r a g e H u m id ity
W ith s ta n d in g V o lta g e
Is o la tio n R e s is ta n c e
Ca p a c it a n c e (in p u t -o u t p u t ) [ p F] (t y p ic a l)
V ib r a tio n
25
100
25
60
100
60
75
100
75
0 .0 3 % / o C m a x im u m )
90
135
75
90
300
400
300
400
1 0 m S ( ty p ic a l)
1 0 m S ( ty p ic a l) a t r a te d in p u t/o u tp u t
N o t s p e c ifie d
F o ld b a c k /C u r r e n t L im itin g w ith a u to m a tic r e c o v e r y a t d is c o n tin u o u s s h o r t c ir c u it c o n d itio n s
N o t a v a ila b le
N o t a v a ila b le
+2 5 0
+2 5 0
+3 5 0
+6 5 0
-250
-900
-1600
-4000
In s ta lle d
- 2 0 to 7 1 o C
3 .5 % / o C ( 5 0o C to 7 1o C ) ( o u t o f w a r r a n ty >= 7 1 o C )
2 0 - 9 0 % /R H ( n o n - c o n d e n s in g )
- 2 0 to +8 5 o C
2 0 to 9 0 % /R H ( n o n - c o n d e n s in g )
P r im a r y - S e c o n d a r y
A C 5 0 0 V fo r 1 m in u te
P r im a r y - S e c o n d a r y 5 0 M Ω ( m in im u m ) b y D C 5 0 0 V in s u la tio n te s te r
4400
40
200
75
400
5- 10H z :10m m double am plitude,10- 55H z :19.6m /s2 ,20m inutes ' per iod for 60m inutes eac h along X ,Y ,Z ax es ( non- oper ating)
Shoc k
2 9 4 m /s2
C o n v e c tio n
C o o lin g
o p e n b o a r d ty p e :1 4 g
W e ig h t ( ty p ic a l)
*1 a t 2 5 o C a n d r a te d in p u t/o u tp u t
*2 O B S **W C 1 2 s a tis fie s th e a b o v e - m e n tio n e d s p e c ific a tio n s a t th e s a m e lo a d c o n d itio n s o n b o th o u tp u ts
*3 m e a s u r e d b y a p r o b e a t th e o u tp u t c o n n e c to r a t a 0 to 1 0 0 M H z b a n d w id th
*4 w h e n in p u t v o lta g e c h a n g e d fr o m 8 V to 1 8 V r a p id ly a t r a te d in p u t
*5 w h e n o u tp u t c u r r e n t c h a n g e d fr o m 0 m A to r a te d c u r r e n t k e e p in g th e c u r r e n t o f o th e r o u tp u t b e lo w m in im u m r a te d c u r r e n t a t r a te d in p u t
*6 w h e n o u tp u t c u r r e n t c h a n g e d fr o m m in im u m r a te d c u r r e n t to r a te d c u r r e n t k e e p in g th e c u r r e n t o f o th e r o u tp u t a b o v e m in im u m r a te d c u
*7 o u tp u t c u r r e n t o f b o th o u tp u ts c h a n g e d fr o m 0 m A to r a te d c u r r e n t id e n tic a lly a t r a te d in p u t
*8 a t - 2 0 to +7 1 o C
*9 fo r 7 h o u r p e r io d a fte r 1 h o u r w a r m - u p a t 2 5 o C a n d r a te d in p u t/o u tp u t
*1 0 w h e n o u tp u t c u r r e n t c h a n g e d fr o m 2 5 % o f r a te d c u r r e n t to 7 5 % r a p id ly a t r a te d in p u t
*1 1 to r e d u c e o u tp u t v o lta g e ,p u t a r e s is to r b e tw e e n p in " 0 " a n d tr im m in g p in
*1 2 to in c r e a s e o u tp u t v o lta g e ,p u t a r e s is to r b e tw e e n p in "+" a n d tr im m in g p in
ETA-USA
Sub.ETA ELECTRIC IND., CO. LTD.
16170 Vineyard Blvd. #180
Morgan Hill, CA 95037
Phone: (408) 778-2793 Fax: (408) 779-2753
www.eta-usa.com
Input specifications SC/WC2448
Model
Specifications
OBS**SC/WC2448
OBS05SC2448 OBS12SC2448 OBS15SC2448 OBS24SC2448 OBS22W C2448 OBS23WC2448
10WATTS/SINGLE/2 OUTPUT
Input Characteristic
Input Voltage DC[V]
24
48
24
48
24
48
24
48
24
48
24
48
Input Range
DC[V]
18-72
Inrush Current
[A]
Not specified
Input Range
at no load [mA](typical)
16
18
14
17
14
17
17
20
18
22
19
23
at full load[mA](typical)
520
262
542
274
520
263
523
268
542
277
520
263
Line Back Noise [mVp-p] (typical)
500
300
500
300
500
300
500
300
500
200
500
200
Efficiency [%] (typical) *1
80
79
83
82
84
83
86
84
83
81
84
83
ETA-USA
Sub.ETA ELECTRIC IND., CO. LTD.
16170 Vineyard Blvd. #180
Morgan Hill, CA 95037
Phone: (408) 778-2793 Fax: (408) 779-2753
www.eta-usa.com
Output Specifications SC/WC2448
Specifications
OBS**SC/WC2448
10WATTS/SINGLE/2 OUTPUT
Output Voltage [V]
Output Current [A]
Voltage Tolerance +/-[mV](maximum) *2
Ripple and Noise [mVp-p](maximum) *3
Regulation
a.Static Line Regulation [mV](maximum)
b.Dynamic Line Regulation +/-[mV](maximum) *4
c.Static Load Regulation [mV](maximum) *5
[mV](maximum) *6
[mV](maximum) *7
d.Temperature Coefficient *8
e.Drift[mV](maximum) *9
f.Dynamic Load Regulation +/- [mV](maximum) *10
Model
OBS05SC2448
OBS12SC2448
OBS15SC2448
5
2
100
12
0.90
240
15
0.70
300
25
100
25
60
100
60
40
200
75
400
75
100
75
+15
-15
0.035-0.35
300
300
120
200
120
60
300
±1500
±750
±60
60
300
±1500
±750
±60
75
300
±1500
±750
±75
75
300
±1500
±750
±75
75
300
75
300
90
300
90
300
Foldback/Current Limiting with automatic recovery at discontinous short circuit conditions
Not available
Remote Sence
Environmental
Operating Temperature
(derating) *13
Operating Humidity
Storage Temperature
Storage Humidity
Withstanding Voltage
Isolation Resistance
Capacitance(input-output) [pF](typical)
Vibration
Shock
Cooling
Weight (typical)
+12
-12
0.045-0.45
240
240
0.03%/℃(maximum)
90
135
300
500
10mS(typical)
10mS(typical) at rated input/output
Not specified
Overvoltage Protection
Input Fuse
24
0.45
480
OBS23WC2448
100
g.Recovery Time *4, *10
Rise up time
Hold up time
Functions
Overcurrent Protection
Trimming of output voltage[mV] *11
[mV] *12
OBS24SC2448 OBS22WC2448
Not available
+250
+250
+350
+650
-250
-900
-1600
-4000
Installed
-20 to 71℃
3.5%/℃(50℃to 71℃) (out of warranty ≧71℃)
20-90%/RH(non-condensing)
-20 to +85℃
20 to 90%/RH(non-condensing)
Primary-Secondary AC500V for 1minute
Primary-Secondary 50MΩ(minimum) by DC500V insulation tester
4400
5-10Hz:10mm double amplitude,10-55Hz:19.6m/s2,20minutes' period for 60minutes each along X,Y,Z axes(non-operating)
294m/s2
Convection
open board type:14g
Conditions:
*1 at 25℃and rated input/output
*2 OBS**WC2448 satisfies the above-mentioned specifications at the same load conditions on both outputs
*3 measured by a probe at the output connector at a 0 to 100MHz bandwidth
*4 when input voltage changed from 18V to 72V rapidly at rated input
*5 when output current changed from 0mA to rated current keeping the current of other output below minimum rated current
at rated input
*6 when output current changed from minimum rated current to rated current keeping the current of other output
above minimum rated current at rated input
*7 output current of both outputs changed from 0mA to rated current identically at rated input
*8 at -20 to +71℃
*9 for 7hour period after 1hour warm-up at 25℃and rated input/output
ETA-USA
*10 when output current changed from 25% of rated current to 75% rapidly
at rated input
Sub.ETA
ELECTRIC
IND., CO. LTD.
*11 to reduce output voltage,put a resistor between pin"0"
and trimming
pin
Vineyard
Blvd. #180
*12 to increase output voltage,put a resistor between pin"+" and16170
trimming
pin
Morgan Hill, CA 95037
Phone: (408) 778-2793 Fax: (408) 779-2753
www.eta-usa.com
DIMENSION DIAGRAM
ETA-USA
Sub.ETA ELECTRIC IND., CO. LTD.
16170 Vineyard Blvd. #180
Morgan Hill, CA 95037
Phone: (408) 778-2793 Fax: (408) 779-2753
www.eta-usa.com
OCP Curve
ETA-USA
Sub.ETA ELECTRIC IND., CO. LTD.
16170 Vineyard Blvd. #180
Morgan Hill, CA 95037
Phone: (408) 778-2793 Fax: (408) 779-2753
www.eta-usa.com
Derating Curve
ETA-USA
Sub.ETA ELECTRIC IND., CO. LTD.
16170 Vineyard Blvd. #180
Morgan Hill, CA 95037
Phone: (408) 778-2793 Fax: (408) 779-2753
www.eta-usa.com
BLOCK DIAGRAM
ETA-USA
Sub.ETA ELECTRIC IND., CO. LTD.
16170 Vineyard Blvd. #180
Morgan Hill, CA 95037
Phone: (408) 778-2793 Fax: (408) 779-2753
www.eta-usa.com