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MAXREFDES1253: Miniature 17V, 0.75A No Opto Flyback DC to DC Converter Using the MAX17690

MAXREFDES1253

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説明

The MAXREFDES1253 is a no-opto flyback converter that delivers up to 0.75A at 17V from a 18V to 54V supply voltage. It is designed for industrial equipment that needs isolated voltage from wide input supply voltage.

The MAXREFDES1253 illustrates techniques using the no-opto flyback converter to generate isolated output. This document explains how the MAX17690 no-opto flyback converter can be used to generate 17V from 18V to 54V input voltage.

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-medium isolated DC-DC power-conversion applications. However, the use of an optocoupler or an auxiliary winding on the flyback transformer for voltage feedback across the isolation barrier increases the number of components and design complexity. The MAX17690 eliminates the need for an optocoupler or auxiliary transformer winding and achieves ±5% output voltage regulation over line, load, and temperature variations.

The MAX17690 implements an innovative algorithm to accurately determine the output voltage by sensing the reflected voltage across the primary winding during the flyback time interval. By sampling and regulating this reflected voltage when the secondary current is close to zero, the effects of secondary-side DC losses in the transformer winding, the PCB tracks, and the rectifying diode on output voltage regulation can be minimized.

 

回路図

schematic

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PCBレイアウト

pcb-layout

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部品表(BOM)

design-files

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試験結果

bom

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パラメトリック

入力タイプ Vin(Min) Vin(Max) Iout(Max) シングル/マルチ出力 Vout(V) Pout(W) 絶縁型/非絶縁型 トポロジ
DC 18 54 0.75 Single 17 12.75 Isolated No-Opto Flyback

パラメトリック

入力タイプ DC
Vin(Min) 18
Vin(Max) 54
Iout(Max) 0.75
シングル/マルチ出力 Single
Vout(V) 17
Pout(W) 12.75
絶縁型/非絶縁型 Isolated
トポロジ No-Opto Flyback

マキシムデバイス (1)

型番 名称 製品ファミリ 注文 設計キットおよび評価モジュール
MAX17690 60V、フォトカプラ不要の絶縁型フライバックコントローラ 絶縁型電源 今すぐ購入

マキシムデバイス (1)

型番 製品ファミリ
絶縁型電源
60V、フォトカプラ不要の絶縁型フライバックコントローラ

設計ファイル (4)

タイトル 種類 サイズ 日付
MAXREFDES1253 BOM CSV 4KB 2021-08-01
MAXREFDES1253 PCB Layout PDF 660KB 2021-06-26
MAXREFDES1253 Schematic PDF 16KB 2021-08-01
MAXREFDES1253 Test Results PDF 132KB 2021-08-01
日付 種類
2021-08-01

MAXREFDES1253 BOM

(CSV, 4KB)

2021-06-26

MAXREFDES1253 PCB Layout

(PDF, 660KB)

2021-08-01

MAXREFDES1253 Schematic

(PDF, 16KB)

2021-08-01

MAXREFDES1253 Test Results

(PDF, 132KB)

MAXREFDES1253 関連ビデオ

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