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

B_XT-W2R2

2013.03.01-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 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 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.

2) Overload Protection

Under normal operating conditions, the output circuit of these products has no protection against overload. The simplest method is to add a circuit

breaker to 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, see (Figure 2).

It should also be noted that the capacitance of 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 recommended capacitance of its filter capacitor sees (Table 1).

Vin

GND

+Vo

0V

DC

Cin

DC

Cout

(Figure 2)

EXTERNAL CAPACITOR TABLE (Table 1)

Vin

(VDC)

Cin

(

µF)

Vo

(VDC)

Cout

(

µF)

5

4.7

5

10

12

2.2

12

2.2

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 and an capacitor filtering network with

overheat protection that is connected to the input or output end in series (Figure 3), the recommended capacitance of its filter capacitor sees (Table 1),

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

Vin

GND

0V

+Vo

DC

DC

REG

REG

(Figure 3)

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