Analog Devices / Maxim Integrated MAX17693 No-Opto Isolated Flyback Converters

Analog Devices MAX17693 No-Opto Isolated Flyback Converters 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.

Features

Reduces external components and total cost
Eliminates the optocoupler and secondary-side error amplifier
Up to 20% space savings
76V, low R_DSON 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, SpreadSpectrum 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

Applications

Isolated power supplies
PLC I/O modules

IGBT gate drive supplies
Industrial and telecom applications

Analog Devices / Maxim Integrated MAX17693 No-Opto Isolated Flyback Converters

Features

Applications

Typical Application Circuit

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