The copyright and authority for the interpretation of the products are reserved by MORNSUN

D_S-1W3-ZK

2013.04.08-A/0

Page 4 of 4

TEST CONFIGURATIONS

Input Reflected-Ripple Current Test Setup

Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate the source impedance .

DC

Cin

Lin

DC

Load

Oscilloscope

Current

Probe

Lin(4.7

µH)

Cin(220

µF, ESR < 1.0Ω at 100 KHz)

DESIGN CONSIDERATIONS

1) Requirement for output load

To ensure this module can operate efficiently and reliably, 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 to the output in parallel to increase the load.

2) Overload Protection

Under normal operating conditions, the output circuit of these products have not overload protection. The simplest method is to add a breaker

circuit in the circuit.

3) Recommended circuit

If you want to further decrease the input/output ripple, an capacitor filtering network may be connected to the input and output ends of the DC/DC

converter, refer to (Figure 3).

It should also be noted that the capacitance of the capacitor must be proper. If the capacitance is too large, a startup problem might arise.For

ensuring every channel of output can provide a safe and reliable operation , the recommended capacitance of the capacitor refer to (Table 1).

Vin

GND

+Vo

0V

DC

Cin

DC

Cout

(Figure 3)

EXTERNAL CAPACITOR TABLE (Table 1)

Vin

(VDC)

Cin

(

µF)

Vo

(VDC)

Cout

(

µF)

24

1

23/27

0.47

It

’s not recommended to connect any external capacitor in the application field with less than 0.5 watt output.

4) Output Voltage Regulation and Over-voltage Protection Circuit

The simplest device for output voltage regulation, over-voltage and over-current protection is a linear regulator with overheat protection which is

connected to the input or output in series (Figure 4)and an capacitor filtering network.the recommended capacitance of the capacitor refer to Table 1,

linear regulator based on the actual voltage and current to make a reasonable selection.

Vin

GND

0V

+Vo

DC DC

REG

REG

(Figure 4)

5) It is not recommended to increase the output power capability by connecting two or more converters in parallel. The product is not

hot-swappable

Note:

1. Operation under minimum load will not damage the converter; However, they may not meet all specifications.

2. Max. Capacitive Load is tested at nominal input voltage and full load.

3. Unless otherwise noted, All specifications are measured at Ta=25

°C, humidity<75%, nominal input voltage and rated output load.

4. In this datasheet, all test methods are based on our corporate standards.

5. All characteristics are for listed models, and non-standard models may perform differently.Please contact our technical support for more detail.

6. Please contact our technical support for any specific requirement.

7. Specifications of this product are subject to changes without prior 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: 86-20-38601850

Fax:86-20-38601272

E-mail: info@mornsun.cn

Http://www.mornsun-power.com