Renesas RTKA223181DE0010BU Manual

RTKA223181DE0010BU
The RTKA223181DE0010BU, featuring the
RAA223181 900V regulator, is a dual output 5.7W
universal input flyback evaluation board; it provides a
low-cost high performance isolated AC/DC solution
from a universal input of 85V
13V output and a 5V output for smart meter
applications.
The RTKA223181DE0010BU features proprietary
cost savings such as the short-time heavy load
operation that eliminates the need of transformer
over-design for the heavy load in communication, and
it features a single 400V electrolytic capacitor for
input voltage up to 450V
capacitances when compared to the traditional two-
cap solution. The board operates in DCM with
constant frequency at 50kHz in normal operation and
uses valley switching to reduce switching losses and
EMI noises. The board has the built-in protections of
overload, short-circuit, input brownout, V
V OV, V UV, peak current limit, primary short, and
CC IN
over-temperature protections. With a low-cost input
EMI filter, the board is pre-compliant with
EN55022/CISPR 22 Class B conducted EMI limits,
and it has the 4kV surge capability according to
IEC61000-4-5 standard.
R16UZ0026EU0100 Rev.1.00
Nov 5, 2021
to 265V to both a
AC AC
that saves 3x
AC
UV,
CC
Evaluation Board Manual
Features
▪ Fault tolerant input range up to 450V
▪ Short-time heavy load support
▪ Single bus capacitor design for input up to 450V
▪ Low BOM cost design
▪ EMI compliance for EN55022/CISPR22
▪ Surge test compliance to IEC61000-4-5 up to 4kV
Specifications
This board is optimized for the following operating
conditions:
▪ Input voltage: 85V
AC
▪ Operating temperature: -40C ~ 95C
▪ Output: 13V/400mA; 5V/100mA
▪ Output power: 5.5W
▪ Max short-time load support (80ms):
• 9.5W - 85V ~ 265V
AC
• 12W - 120V and 230V
AC
▪ Efficiency: >75% at 100% load; >75% at 50% load
▪ Load regulation: 13V: <±2%; 5V: <±8%,
10% to 100% load
▪ Board dimension: 48mm x 29mm
AC
~ 265V
AC
input
AC
input
AC
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AC