TEST CONFIGURATIONS
Input reflected-ripple current test setup
Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.
Oscilloscope
Lin
Current
Probe
Load
Cin
DC
DC
Lin(4.7µH)
Cin(220µF, ESR < 1.0Ω at 100 KHz)
DESIGN & APPLY CONSIDERATIONS
1) Requirement on output load
To ensure this module can operate efficiently and reliably, During operation, the minimum output load could not be less than 10% of the full
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, or
use our company’s products with a lower rated output power.
2) Overload Protection
Under normal operating conditions, the output circuit of these products has no protection against overload. The simplest method is add a circuit
breaker to the circuit.
3) Recommended circuit
All the PWA_(C)D-10W & PWB_(C)D-10W series have been tested according to the following recommended testing circuit before leaving factory.
(see Figure 3).
If you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low ESR. However, the
capacitance of the output filter capacitor must be proper. If the capacitance is too big, a startup problem might arise. For every channel of output,
provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor must less than the Max. Capacitive Load.
General: Cin: 10μF~47μF
Cout:10μF/100mA
Single output
Dual output
6
D1 Ic
R
D1 Ic
R
Vc
Vc
6
2
3
2
1
3
4
Vin
Vin
+Vo
0V
+Vo
0V
Cout
Cout
Cin
DC/DC
5
DC/ DC
Cin
Cout
5
1
GND
GND
-Vo
(Figure 3)
4) CTRL Terminal
When open or high impedance, the converter work well; When this pin is ‘high level’; the converter shutdown; It should be note that the input
current should between 5-10mA,exceeding the maximum 20mA will cause permanence damage to the converter. The value of R can be derived as
follows:
VC - VD - 1.0
R =
IC
5) Input current
Nominal input voltage range. The input current of the power supply must be sufficient to the startup current (Ip) of the DC/DC module (Figure 4).
General: Ip ≤1.6*Iin-max
Ip
Input Voltage
Range
Input Voltage (V)
(Figure 4)
6) No parallel connection or plug and play
Note:
1. The load shouldn't be less than 10%, otherwise ripple will increase dramatically. Operation under minimum load will not damage the converter;
However, they may not meet all specification listed.
2. Max. Capacitive Load tested at input voltage range and full load.
3. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
4. In this datasheet, all the test methods of indications are based on corporate standards.
5. Only typical models listed, other models may be different, please contact our technical person for more details.
6. Our company offer custom products.
7. Specifications subject to change without notice.
MORNSUN Science & Technology Co.,Ltd.
Address: No. 5, Kehui St. 1, Kehui development center, Science Ave., Guangzhou Science City, Luogang district, Guangzhou,P.R.China.
Tel: 86-20-28203030
Fax:86-20-38601272
Http://www.mornsun-power.com
The copyright and authority for the interpretation of the products are reserved by MORNSUN
PWA_(C)D-10W&PWB_(C)D-10W A/4-2012 Page 5 of 5
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