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UM0984 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 UM0984
기능 STEVAL-ISA081V1 demonstration board based on a 12V / 1A isolated flyback User manual
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UM0984 데이터시트, 핀배열, 회로
UM0984
User manual
STEVAL-ISA081V1 demonstration board based on a 12 V / 1 A
isolated flyback
Introduction
The purpose of this document is to provide information on the STEVAL-ISA081V1 switched
mode power supply (SMPS) demonstration board. The STEVAL-ISA081V1 is an isolated
SMPS capable of delivering a 12 W output over a wide input voltage range. It is designed for
a mains application focused on providing a cost-effective and space saving solution.
The STEVAL-ISA081V1 SMPS generates 12 V nominal output voltage using primary
regulation. This board is based on VIPer™26LD - a monolithic converter integrating a high
voltage MOSFET and PWM controller in one package.
This document contains a fundamental technical description of the demonstration board
(schematic diagram, PCB details, and bill of materials) as well as basic measurements
(load regulation, efficiency, standby behavior, EMI and thermal behavior data).
The last section of this document contains short recommendations on how to set different
output voltages in the range of 10 to 18 V and how to improve efficiency up to 86%.
Figure 1. Demonstration board STEVAL-ISA081V1
June 2012
Doc ID 17812 Rev 2
1/25
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UM0984 pdf, 반도체, 판매, 대치품
List of figures
List of figures
UM0984
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Demonstration board STEVAL-ISA081V1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Input/output connection of SMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
STEVAL-ISA081V1 circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Transformer construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
PCB layout - from top side TOP, BOT SMD, BOT copper . . . . . . . . . . . . . . . . . . . . . . . . . 12
Efficiency at 120 VAC and 230 VAC vs. output current . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Efficiency at full load (1 A) vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Standby power vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
12 V output load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3 V output load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Output voltage at no load vs. the input voltage level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
EMI measurement regarding EN55022 Class 2 - left peak detector,
right AVG detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Thermal map of the board at 305 V AC on the input - left bottom side, right top side . . . . 21
Thermal map of the board at 85 V AC on the input - left bottom side, right top side . . . . . 21
4/25
Doc ID 17812 Rev 2

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UM0984 전자부품, 판매, 대치품
UM0984
3 Bo
ard description
Board description
3.1 S
chematic
A schematic diagram of the isolated flyback converter board prototype based on the
VIPER26LD is provided in Figure 3 on page 8.
Doc ID 17812 Rev 2
7/25

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UM0984

STEVAL-ISA081V1 demonstration board based on a 12V / 1A isolated flyback User manual

STMicroelectronics
STMicroelectronics

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