B0303LS-W25 Datasheet, PDF (2/2 Pages) MORNSUN Science& Technology Ltd. – DUAL/SINGLE OUTPUT DC-DC CONVERTER

ISOLATION SPECIFICATIONS
Item
Test conditions
Isolation voltage Tested for 1 minute and 1 mA max
Isolation resistance Test at 500VDC
Min Typ
1000
1000
Max Units
VDC
MΩ
OUTPUT SPECIFICATIONS
Item
Test conditions
Min Typ Max Units
Output power
0.25 W
Line regulation
For Vin change ^{(3.3V input)}
of ±1%
(Others input)
±1.5
±1.2
(3.3V output)
12 20
Load regulation
10% to 100%
load
(5V output)
(9V output)
(12V output)
10.5 15 %
8.3 15
6.8 15
(15V output)
6.3 15
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. See below recommended circuits for more details.
3. Dual output models unbalanced load: ±5%.
TYPICAL CHARACTERISTICS
Operating Temp.(^oC)
OUTLINE DIMENSIONS & PIN CONNECTIONS
2.10
(0.083)
2.54
(0.100)
First Angle Projection
RECOMMENDED FOOTPRINT
Top view,grid:2.54*2.54mm(0.1 *0 .1inch),
d ia m e te r :1 .0 0m m(0 .03 9 i n ch )
Dual Output
12 456
Single Output
12 4 6
(0.020)
Note:
Unit:mm(inch)
Pin section:0.50*0.30mm(0.020*0.012inch)
Pin section tolerances: 0.10mm( 0.004inch)
General tolerances: 0.25mm( 0.010inch)
FOOTPR INT DE TA ILS
Pin Single
1
Vin
2
GND
4
0V
5 No Pin
6
+Vo
Dual
Vin
GND
-Vo
0V
+Vo
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
Cin
GND
DC DC
L
+Vo
Cout
0V
L ^Cout
-Vo
Single Output
L
Vin
L
+Vo
Cin
GND
DC DC
Cout
0V
(Figure 1)
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).
Dual O ut put
Vin
REG
REG
GND
DC DC
REG
Single O utput
Vin
REG
REG
DC DC
GND
(Figure 2)
+Vout
0V
- Vout
+Vout
0V
No parallel connection or plug and play.
MORNSUN reserves the copyright Specifications subject to change without notice.
A_S-W25 & B_LS-W25 A/2-2008
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