OUTPUT SPECIFICATIONS
Item
Output voltage accuracy
Load regulation
Line regulation
Cross regulation
Ripple and noise
Transient recovery time
Transient peak deviation
Over load protection*
Output Short Circuit
3.3V
5V
Over voltage protection
12V
15V
24
Temperature drift (Vout)
Trim
Tested under 20MHz brand
25%load change
Input voltage range
120
3.63
5.5
13.2
16.5
26.4
0.02
±10%Vo
50
75
200
±2
130
Test conditions
Refer to recommended circuit
From 10% to 100% load
Input voltage from low to high
Min
Typ
±1
±0.5
±0.2
Max
±3
±1
±0.5
±5
150
300
±5
150
4.29
6.5
15.6
19.5
31.2
%/℃
VDC
VDC
mV
us
%
%
%
Units
OUTPUT VOLTAGE TRIM
+V0
Trim
Trim
+Vo
0V
Trim up/d own
0V
Trim up
Trim
Trim down
RECOMMENDED CIRCUIT
Vi n
L
Cin
Vout
Hiccup, automatics recovery
GND
L
DC
DC
Cout
0V
For single output
Vout
Cout
Cin
Vin
-0V
DC
GN D
DC
Cout
-Vo
For dual output
Fig.1
In order to abtain better performance for
the DC/DC models. it’s recommended that
use input and output filters as Fig.1 shown..
COMMON SPECIFICATIONS
Item
Operating Temperature
Storage Temperature
Storage Humidity
Isolation voltage
Isolation resistance
Isolation Capacitance
Switching frequency
MTBF
Case Material
Weight
100KHz / 1V
Nominal, full load
Test for 1 minute and 1 mA max
Test conditions
Min
-40
-55
5
1500
500
1000
300
100
Aluminous alloy
39
G
Typ
Max
71
105
95
VDC
MΩ
pF
KHz
K hours
℃
Units
DERATING & EFFICIENCY CURVE
Temperature derating curve
Output Power(%)
Operating Temp(
o
C)
Note:
1. All specifications are measured at TA=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2. The CTRL control pin voltage is referenced to GND.
3. Typical Eff value at nominal input voltage and full load.
4. Capacitor MAX load tested at nominal input voltage and constant resistive load.
5. Refer to the diagram of Output Voltage trim up/down for trim applications.
6. The products cannot be used in parallel and in plug and play.
Curve of Efficiency VS output load
VRA2412D-20W
EFF %
100
90
80
70
60
50
40
30
20
10
0
EfficiencyVS Output load
OUTLINE DIMENSIONS & FOOTPRINT DETAILS
F irst Angle Proj ectio n
50.80 (2.000)
2.54
(0.100)
45.72 ( 1.800)
RE CO MM E N DE D FO OT PR I N T
To p
v iew ,g r id :2 . 5 4m m (0 .1 in ch ) ,
d ia me te r :1 . 50 m m(0 .0 5 9in ch )
10.16 10.16 10.16
( 0.400) (0.400) (0.400)
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Out put %Io
7
1
(B ottom View )
2
3
2.00 (0.080)
3
40.60 (1.600)
4
5
6
7
6
5
4
15.24
( 0.600)
10.1 6
(0.400)
2
1
Curve of Efficiency VS input Voltage
VRA2412D-20W
EFF %
Efficiency VS Input voltage
35.00 (1.380)
N o te:
U n it :m m (i n ch )
P in se ct io n : 1 .0 0 m m( 0. 0 39 in ch )
P in se ct io n t o l er a nce s :
+
0 .05 m m(
+
0 . 0 02 in c h)
G e ne r al to le ra n c es:
+
0 . 2 5mm (
+
0.0 1 0 in ch )
F OO T PRIN T D ETAIL S
S ing l e
P in
D ua l
1
Vin
V in
2
GN D
G ND
3
C t rl
C tr l
4
Trim
Tr im
- Vo
0V
5
Com
6
+ Vo
7
No pin
+ Vo
94
92
91
89
87
85
84
82
80
18
20
22
24
26
28
30
32
34
36
I npu t vol ta ge（V）
7.80
(0.300)
MORNSUN reserves the copyright
10.50
( 0.410)
10.00
(0.390)
Specifications subject to change without notice
(
4.10
0.161)
5.08
(0.200)
VRB_D-20W＆VRA_D-20W
A/3-2008
Page 1 of 2
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