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4.2V–60V No-Opto Isolated Flyback Converter with Integrated FET

ソリューションサイズおよび部品数を最大30%削減

製品の詳細

主な特長

アプリケーション/用途

Parametric specs for Isolated Power Supplies
VIN (V) (min) 4.2
VIN (V) (max) 60
Topology Flyback
Application (VIN) Base Station (24V)
Industrial (24V)
Networking (48V)
Power Over Ethernet (32-58V)
Switch Type Internal
Feedback Primary Side
Switching Frequency (kHz) 100-300
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
0.81
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技術資料

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パラメーター

Parametric specs for Isolated Power Supplies
VIN (V) (min) 4.2
VIN (V) (max) 60
Topology Flyback
Application (VIN) Base Station (24V)
Industrial (24V)
Networking (48V)
Power Over Ethernet (32-58V)
Switch Type Internal
Feedback Primary Side
Switching Frequency (kHz) 100-300
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
0.81

主な特長

  • Reduces External Components and Total Cost
    • Eliminates the Optocoupler and Secondary-Side Error Amplifier
    • Up to 20% Space Savings
    • 76V, Low RDSON Integrated nMOSFET
    • Internal Loop Compensation (MAX17693A)
    • Built-In Soft-Start  
  • Reduces Power Dissipation
    • Delivers up to 1.4W Output Power
    • Frequency Fold-Back Enables Enhanced Light-Load Efficiency
    • 2.5µA Shutdown Current 
  • Supports Key System-Level Design Requirements
    • Frequency Dithering Supports Low-EMI, Spread-Spectrum Operation
    • Switching Frequency Synchronization to External Clock
  • Operates Reliably in Adverse Environments
    • Output Diode Forward Voltage Temperature Compensation
    • Hiccup Current-Limit Protection
    • Programmable EN/UVLO Threshold
    • Input Overvoltage (OVI) Protection (MAX17693A)
    • Overtemperature Protection
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

アプリケーション/用途

  • IGBTゲート駆動電源
  • 産業およびテレコムアプリケーション
  • 絶縁型電源
  • PLC I/Oモジュール

説明

Maxim's Rainier family of isolated power devices enable cooler, smaller, and simpler power-supply solutions. The MAX17693A/B are high efficiency No-Opto integrated nMOSFET flyback converters that use fixed frequency peak current mode control. The device senses the isolated output voltage directly from the primary-side flyback waveform during the secondary-side rectifier conduction. No secondary-side error amplifier and optocoupler are required to provide an accurate, isolated, regulated output voltage, saving up to 20% of PCB space normally required for a traditional flyback converter.

The MAX17693A/B feature a low RDSON, 76V, 245mΩ integrated nMOSFET primary switch and are designed to operate over a wide supply range from 4.2V to 60V. The switching frequency of the device is programmable from 100kHz to 350kHz. An EN/UVLO feature allows the user to turn ON/OFF the power converter precisely at the desired input voltage. Input overvoltage protection can be implemented using the OVI pin (MAX17693A only). Soft-start limits inrush current at startup. The MAX17693A/B support external clock synchronization to avoid low-frequency “beats” on the input bus in systems with multiple converters. The devices also have programmable frequency dithering for low-EMI, spread-spectrum operation.

The MAX17693A/B allow temperature compensation for variations in the output rectifier diode forward voltage drop. The MAX17693A is internally compensated for loop stability, while the MAX17693B offers external loop compensation flexibility. The MAX17693A/B have robust hiccup-protection and thermal protection schemes, and are available in space-saving 12-pin, 3mm x 3mm TDFN packages with a temperature range from -40°C to +125°C.

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MAX17693A、MAX17693B:標準アプリケーション回路 MAX17693A、MAX17693B:標準アプリケーション回路 Zoom icon

技術資料

サポートとトレーニング

技術質問への回答についてはナレッジベースで検索ください。

絞り込まれた検索

マキシムでは、お客様の技術的質問にお答えするため、アプリケーションエンジニアの専任チームも配置しています。 サポートセンター をご利用ください。