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URA_LD-15W&URA_LD-20W

2013.06.13-B/1

Page 6 of 6

HEATSINK ASSEMBLY & PACKAGE DIAGRAM

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, or

use our company

’s products with a lower rated output power.

2) Recommended circuit

All the URA_LD-15W&URA_LD-20W Series have been tested according to the following recommended testing circuit before leaving factory. This

series should be tested under load. Never be tested under no load (see Figure 3).

If you want to further decrease the output ripple, you can increase capacitance properly or choose capacitors with low ESR. However, th e

capacitance can

’t exceed the maximum capacitor load in the list (Table 1).

Vin

GND

+Vo

0V

Cin

Cout

DC

DC

-Vo

Cout

Dual Output

(Figure 3)

EXTERNAL CAPACITOR TABLE (TABLE 1)

Capacitance

Vout(VDC)

Cout

Cin(

µF)

±5

220

±12

100

±15

100

100

Note:

Note:

1. 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 our corporate standards.

5. All characteristics are for listed model only, non-standard models may perform differently, please contact our technical person for more detail.

6. Contact us for your specific requirement.

7. Specifications subject to change 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