B0303LD-W25 Datasheet, PDF (2/2 Pages) MORNSUN Science& Technology Ltd. – DUAL/SINGLE OUTPUT DC-DC CONVERTER

ISOLATION SPECIFICATIONS
Item
Test conditions
Min Typ Max Units
Isolation voltage
Isolation resistance
Tested for 1 minute and 1 mA max
Test at 500VDC
1000
1000
VDC
MΩ
OUTPUT SPECIFICATIONS
Item
Test conditions
Min Typ Max Units
Output power
Line regulation
For Vin change of 1% ^(3.3output)
(others output)
0.25 W
±1.5
±1.2
(3.3 output)
12
20
(5V output)
10.5 15
%
Load regulation
10% to 100% load (9V output)
8.3
10
(12V output)
6.8
10
(15V output)
6.3
10
Output voltage accuracy
Temperature drift
100% full load
See tolerance envelope graph
0.03 %/°C
Ripple & Noise*
20MHz Bandwidth
50
75 mVp-p
Switching frequency Full load, nominal input
100
KHz
*Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
Note:
1.All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated output load
unless otherwise specified.
2.Dual output models unbalanced load: ±5%.
TYPICAL CHARACTERISTICS
APPLICATION NOTE
Requirement on output load
To ensure this module can operate efficiently
and reliably, During operation, the minimum
output load is not less than 10% of the full load,
and that this product should never be
operated under no load! If the actual output
power is very small, please connect a resistor
with proper resistance at the output end in
parallel to increase the load.
Overload Protection
Under normal operating conditions, the output
circuit of these products has no protection
against overload. The simplest method is to
connect a self-recovery fuse in series at the
input end or add a circuit breaker to the circuit.
Recommended circuit
If you want to further decrease the input/output
ripple, an “LC” filtering network may be
connected to the input and output ends of the
DC/DC converter, see (Figure 1).
Dual Output
L
Vin
L
+Vo
Cout
Cin
GND
DC DC
L ^Cout
0V
-Vo
Single Output
L
Vin
L
+Vo
Cin
DC DC
Cout
GND
0V
(Figure 1)
Operating Temp.(^oC)
OUTLINE DIMENSIONS & PIN CONNECTIONS
20.00(0.787)
(Side View)
Fi rst A ngle P ro jecti on
RECOMMENDED FOOTPRINT
Top view, grid: 2.54*2. 54mm(0. 1*0.1inch)
diameter:1.00 (0. 039)mm
Single Output
15.24(0.600)
1
7
(Bottom View)
14
11 9 8
14
11 9 8
1
7
Dual Output
FOOTPRINT DETAILS
Pin Single
Dual
1
GND
GND
7
NC
NC
8
0V
0V
9
+Vo
+Vo
11 No Pin
-Vo
14
Vin
Vin
14
11 9 8
1
7
Note:
U ni t:m m ( i n ch )
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
It should also be noted that the inductance and
the frequency of the “LC” filtering network should
be staggered with the DC/DC frequency to avoid
mutual interference. However, the capacitance of
the output filter capacitor must be proper. If the
capacitance is too big, a startup problem might
arise. It’s not recommended to connect any
external capacitor in the application field .
Output Voltage Regulation and Over-voltage
Protection Circuit
The simplest device for output voltage
regulation, over-voltage and over-current
protection is a linear voltage regulator with
overheat protection that is connected to the input
or output end in series (Figure 2).
Du a l O u tput
Vi n
R EG
REG
DC DC
GND
REG
Sing le Ou tp ut
Vi n
R EG
REG
GND
DC DC
(Figure 2)
+Vout
0V
-Vo ut
+Vout
0V
No parallel connection or plug and play.
MORNSUN reserves the copyright
Specifications subject to change without notice.
A_D-W25 & B_LD-W25 A/1-2008
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