cui.com

date 07/26/2016

│ page 8 of 9

CUI Inc

│ SERIES: PCN1-M │ DESCRIPTION: DC-DC CONVERTER

TEST CONFIGURATIONS

Input Ripple Current & Output Noise

Table 1

L1

12 µH

C1

2.2 µF tantalum capacitor

C2

NC

EMC RECOMMENDED CIRCUIT

Test Condition

Input Voltage: Nominal

Output Load: Full Load

Table 2

Input

Voltage

(Vdc)

Cin

5

2.2 µF ceramic capacitor

12

2.2 µF ceramic capacitor

C1

C2

L1

To Oscilloscope

+Vin

-Vin

+Vo

-Vo

R-Load

Vin

+

-

+Vin

-Vin

-Vo

+Vo

R-Load

Cext

0.33 µF

Vin

+

-

BNC

To Scope

Cin

Common

Cext

0.33 µF

BNC

To

Figure 2 Measuring Output Ripple &

Noise for Single Output Models

+Vin

-Vin

-Vo

+Vo

R-Load

Cext

0.33 µF Ceramic

Vin

+

-

BNC

To Scope

Cin

Figure 1 Measuring Input

Ripple Current

Figure 3 Measuring Output Ripple &

Noise for Dual Output Models

C2

L1

+Vin

-Vin

+Vo

-Vo

R-Load

C1

+VIN

-VIN

Table 3

Figure 4 Conducted Emissions Test Circuit

EN55022 Class B

Recommended External Circuit Components

Input

Voltage

(Vdc)

L1

5

4.7 µF / 25 V 4.7 µF / 25 V

10 µH

12

4.7 µF / 25 V 4.7 µF / 25 V

10 µH

Notes:

1. Ceramic Capacitor

For more information, please visit the product page.