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MAXREFDES1194: Five-Output, No-Opto Flyback DC-DC Converter Using the MAX17690

MAXREFDES1194

参考设计免责声明 参照  重要声明和免责声明  涵盖参考设计和其他Maxim资源

描述

The MAXREFDES1194 is a no-opto flyback DC-DC power supply that delivers five outputs from a 6V to 60V supply voltage. It is designed for equipment that needs multichannel, isolated power supplies with a wide input voltage range.

The MAXREFDES1194 employs the no-opto flyback control technique of the MAX17690. This document explains how the MAX17690 peak current-mode PWM converter can be used to generate five isolated outputs from a 6V to 60V input voltage. An overview of the design specification is shown above.

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. The MAX17690 also compensates for the negative temperature coefficient of the rectifying diode.

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设计,建造,测试

图中的电路板已完全组装并经过测试。不可出售。

 

参数化

输入类型 Vin(Min) Vin(Max) Iout(Max) 单路/多路输出 Vout(V) Pout(W) 隔离/非隔离 拓扑
DC 6 60 0.3 - 3 1.084 Isolated No-Opto Flyback

参数化

输入类型 DC
Vin(Min) 6
Vin(Max) 60
Iout(Max) 0.3
单路/多路输出 -
Vout(V) 3
Pout(W) 1.084
隔离/非隔离 Isolated
拓扑 No-Opto Flyback

Maxim设备 (1)

器件号 名称 产品线 购买 设计套件和评估模块
MAX17690 60V、无光耦、隔离反激控制器 隔离电源 立即购买 设计套件

Maxim设备 (1)

器件号 产品线
隔离电源
60V、无光耦、隔离反激控制器

设计资料 (6)

标题 类型 尺寸 日期
MAXREFDES1194-PCB PDF 129KB 2019-07-09
MAXREFDES1194-schematic PDF 436KB 2019-07-09
maxrefdes1194-pcb PDF 479KB 2019-08-27
maxrefdes1194-schematic PDF 21KB 2019-08-27
maxrefdes1194-bom PDF 1MB 2019-07-09
TTS MAXREFDES Test Results Template_Rev 0_0318 PDF 191KB 2019-07-09
日期 类型
2019-07-09

MAXREFDES1194-PCB

(PDF, 129KB)

2019-07-09

MAXREFDES1194-schematic

(PDF, 436KB)

2019-08-27

maxrefdes1194-pcb

(PDF, 479KB)

2019-08-27

maxrefdes1194-schematic

(PDF, 21KB)

2019-07-09

maxrefdes1194-bom

(PDF, 1MB)

2019-07-09

TTS MAXREFDES Test Results Template_Rev 0_0318

(PDF, 191KB)

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