cui.com

date 01/18/2022

│ page 7 of 13

CUI Inc

│ SERIES: PBO-1 │ DESCRIPTION: AC-DC POWER SUPPLY

APPLICATION DESIGN REFERENCE

PBO-1 series additional circuits design reference

Immunity design circuits for reference

Emissions design circuits for reference

Class III

Class IV

Class A

Class B

PBO-1 Series additional component selection guide

Part no.

FUSE

(required)

C1

(required)

C2

(required)

L1

(required)

C3

(required)

C4

CY1

(required)

TVS

PBO-1-S5

1A/300V

4.7µF/450V

(-20°C~85°C)

10µF/450V

(-40°C~85°C)

270µF/16V

(solid-state

capacitor)

2.2µH

(max 60mΩ)

68µF/35V

0.1µF/50V

1.0nF/400 Vac

SMBJ7.0A

PBO-1-S9

100µF/16V

(solid-state

capacitor)

SMBJ12A

PBO-1-S12

SMBJ20A

PBO-1-S15

100µF/35V

SMBJ20A

PBO-1-S24

SMBJ30A

Note: 1. C1: Input capacitors, C2: output storage capacitors, must be connected externally.

2. It is recommended using an electrolytic capacitor with high frequency and low ESR rating for C3. Combined with C2, L1, they form a pí-type filter circuit.

Choose a capacitor voltage rating with at least 20% margin, in other words not exceeding 80%. C4 is a ceramic capacitor, used for filtering high frequency noise.

A suppressor diode (TVS) is a recomended to protect the application in case of a converter failure and specification should be 1.2 times of the output voltage.

PBO-1 Series Enviromental and EMC selection guide

Recommended

circuit

Application

enviromental

Typical industry

Input voltage

range

Enviroment

temperature

Emissions

Immunity

1/2

Basic application

None

85 ~ 305 Vac

-40° ~ 88°C

Class A

Class III

3

Indoor civil

enviroment

Smart home /

Home appliances

(2Y)

-25° ~ 55°C

Class B

Class III

Indoor general

enviroment

Intelligent building /

Intelligent agriculture

4/5

Indoor industrial

enviroment

Manufacturing workshop

-25° ~ 55°C

Class B

Class IV

6

Oudoor general

enviroment

ITS / Video monitoring /

Charging point / Communica-

tion / Securitiy and protection

-40° ~ 85°C

Class A

Class IV

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