OUTPUT SPECIFICATIONS
TYPICAL TEMPERATURE CURVE
Item
Test Conditions
Min.
0.6
Typ.
Max. Units
W
Output power
See above products program
Input voltage from low to high
Form 10% to 100%load
6
Line regulation (at full load)
Load regulation
±0.2
±0.5
±1
±0.5
±2*
±3
%
Positive output voltage accuracy Refer to recommended circuit
Negative output voltage accuracy Refer to recommended circuit
±3
±5
Temperature Drift (Vout)
Ripple**
Refer to recommended circuit
20MHz Bandwidth
±0.02
30
%/°C
mVp-p
KHz
50
Noise**
20MHz Bandwidth
75
150
Switching frequency
100% load, input voltage range
300
100
Operating Temp.(
C )
* Dual output models unbalanced load: ±5%.
**Test ripple and noise by “parallel cable” method. See detailed operation instructions at Testing of
Power Converter section, application notes.
APPLICATION NOTE
RECOMMENDED CIRCUIT
1) Requirement on output load
+Vo
0V
Vin
Cout
In order to ensure the product operate efficiently and reliably, in addition to a max load (namely
full load), a minimum load is specified for this kind of DC/DC converter. Make sure the specified
range of input voltage is not exceeded, the minimum output load no less than 10% load. If the
actual load is less than the specified minimum load, the output ripple may increase sharply while
its efficiency and reliability will reduce greatly. If the actual output power is very small, please add
an appropriate resistor as extra loading, or contact our company for other lower output power
products.
Cin
DC DC
Cout
GND
-Vo
Single Output
+Vo
0V
Vin
Cin
Cout
DC DC
GND
(Figure 1)
2) Recommended Circuit
All the PWA_YMD-6W & PWB_YMD-6W series have been tested according to the following
recommended testing circuit before leaving factory. This series should be tested under load (see
Figure 1).
Ip
If you want to further decrease the input/output ripple, you can increase capacitance properly
or choose capacitors with low ESR. However, the capacitance should not be too high, or may
cause start-up problem. For every channel of output, provided the safe and reliable operation is
ensured, the greatest capacitance of its filter capacitor sees (Table 1). General:
Input Voltage
Range
Input Voltage (V)
(Figure 2)
Cin: 24V&48V
10μF~47μF
Cout: 10μF/100mA
External Capacitor Table (Table 1)
3) Input current
Single Vout
(VDC)
Cout
(μF)
Dual Vout
(VDC)
Cout
(μF)
While using unstable power source, please ensure the output voltage and ripple voltage do not
exceed indexes of the converter. The preceding power source must be able to provide for
converter sufficient starting current Ip (Figure 2).
5
1000
470
330
220
±5
680
330
220
100
12
15
24
±12
±15
±24
General: Ip ≤1.4*Iin-max
4) No parallel connection or plug and play
The copyright and authority for the interpretation of the products are reserved by MORNSUN
Specifications subject to change without notice.
PWA_YMD-6W & PWB_YMD-6W A/1-2010 Page 2 of 3