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MAXREFDES1036: 20.25W Offline Flyback Converter Using MAX17595

MAXREFDES1036

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 MAX17595 is a peak-current-mode controller for designing wide input-voltage flyback regulators. The MAX17595 offers optimized input thresholds for universal input AC-DC converters and telecom DC-DC (36V to 72V input range) power supplies. It contains a built-in gate driver for an external n-channel MOSFET. The MAX17595 houses an internal error amplifier with 1% accurate reference, eliminating the need for an external reference. The switching frequency is programmable from 100kHz to 1MHz with an accuracy of 8%, allowing optimization of magnetic and filter components, resulting in compact and cost-effective power conversion. For EMI-sensitive applications, the MAX17595 incorporates a programmable frequency dithering scheme, enabling low-EMI spread-spectrum operation. Users can start the power supply precisely at the desired input voltage, implement input overvoltage protection, and program soft-start time. A programmable slope compensation scheme is provided to ensure stability of the peak current-mode control scheme. Hiccup-mode overcurrent protection and thermal shutdown are provided to minimize dissipation in overcurrent and overtemperature fault conditions.

An offline DCM flyback converter using the MAX17595 is demonstrated for a 4.5V DC output application. The power supply delivers up to 4.5A at 4.5V.

特征

  • Programmable Switching Frequency Allows Optimization of the Magnetic and Filter Components, Resulting in Compact, Cost-Effective, Efficient Isolated/ Nonisolated Power Supplies
  • 100kHz to 1MHz Programmable Switching Frequency with Optional Synchronization
  • Peak Current Mode Control Provides Excellent Transient Response—Offline (Universal Input AC) and Telecom (36V to 72V) Flyback Controller
  • Programmable Frequency Dithering Enables Low EMI Spread-Spectrum Operation
  • Integrated Protection Features Enhance System Reliability
  • Adjustable Current Limit with External Current Sense Resistor
  • Fast Cycle-By-Cycle Peak Current Limiting Hiccup-Mode Short-Circuit Protection
  • Overtemperature Protection
  • Programmable Soft-Start and Slope Compensation
  • Input Overvoltage Protection

  • maxrefdes1036

    maxrefdes1036

  • maxrefdes1036

    maxrefdes1036

Icon

设计, 制作, 测试

图中的电路板已经完成封装和测试。不可售。

 

示意图

PCB布局

物料清单(BOM)

试验结果

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
AC 195 265 4.5 - 4.5 - Isolated Flyback

参数化

输入类型 AC
Vin(Min) 195
Vin(Max) 265
Iout(Max) 4.5
单路/多路输出 -
Vout(V) 4.5
Pout(W) -
隔离/非隔离 Isolated
拓扑 Flyback

Maxim设备 (1)

器件号 名称 产品线 购买 设计套件和评估模块
MAX17595 峰值电流模式控制器,用于构建反激和boost稳压器 隔离电源 立即购买 Design Kits

Maxim设备 (1)

器件号 产品线
隔离电源
峰值电流模式控制器,用于构建反激和boost稳压器

设计资料 (5)

标题 类型 尺寸 日期
maxrefdes1036-bom PDF 224KB 2019-07-09
maxrefdes1036-pcb PDF 1MB 2019-07-09
maxrefdes1036-schematic PDF 140KB 2019-07-09
MAXREFDES1036 - 20.25W Offline Flyback Converter Using the MAX17595 PDF 688KB 2019-07-09
TTS MAXREFDES Test Results Template_Rev 0_0318 PDF 601KB 2019-07-09
日期 类型
2019-07-09

maxrefdes1036-bom

(PDF, 224KB)

2019-07-09

maxrefdes1036-pcb

(PDF, 1MB)

2019-07-09

maxrefdes1036-schematic

(PDF, 140KB)

2019-07-09

MAXREFDES1036 - 20.25W Offline Flyback Converter Using the MAX17595

(PDF, 688KB)

2019-07-09

TTS MAXREFDES Test Results Template_Rev 0_0318

(PDF, 601KB)

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