Demonstration Board Manual

X0119847 Rev.1.1 Page 1

The RAA223012 demonstration boards

(RTKA223012DR0010BU and

RTKA223012DR0020BU) are high voltage Buck

converters that demonstrate low-cost high

performance non-isolated AC/DC conversion from a

universal input of 85V

to 265V

, to a 5V output

with the output current up to 150mA.

The board has built-in overcurrent, short-circuit, input

brownout, and over-temperature protection, and is

designed on a compact PCB with a low-cost

half-wave input rectification. It is pre-compliant with

conducted and radiated EMI requirements by

EN55022/CISPR 22 and the 1.5kV surge test by

IEC61000-4-5 standard.

RTKA223012DR0010BU comes with a RAA223012

in SO8 package. RTKA223012DR0020BU comes

with a RAA223012 in SOT23-5 package.

Features

▪ Universal input range

▪ Compact PCB with low-cost external components

▪ EMI compliance for EN55022/CISPR22

▪ Surge test compliance to IEC61000-4-5 up to

1.5kV

▪ Standby power less than 10mW

▪ No audible noise

Specifications

This board is optimized for the following operating

conditions:

Input voltage: 85V

~ 265V

Output voltage: 5V

Output current: 150mA maximum

Output power: 0.75W

Efficiency: >62.5% at 100% load; 65% at 50% load

No-load power: <10mW at 230V

Load regulation: -3%, load range 10% to 100%

Operating temperature: -45~85°C

Board dimension: 48mm x 29mm

RTKA223012DR0010BU, RTKA223012DR0020BU

X0119847 Rev.1.1 Page 2

Jul 2, 2021

RTKA223012DR0010BU, RTKA223012DR0020BU Demonstration Board Manual

Contents

1. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Recommended Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Setup and Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2. Board Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Layout Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.3 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3.1 RTKA223012DR0010BU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3.2 RTKA223012DR0020BU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.4 Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3. Typical Performance Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4. EMI Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12