Analog Devices MAX17692B | Demoboard MA17692BEVKIT

Description

Maxim's Rainier family of isolated power devices enable cooler, smaller, and simpler power-supply solutions. The MAX17692A/B is a high efficiency no-opto integratednMOSFET flyback converter that uses 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 requiredto provide an accurate, isolated, regulated output voltage, saving up to 20% of PCB space normally required for a traditional flyback converter.The MAX17692A/B features a low RDSON, 76V, 205mΩ integrated nMOSFET primary switch and is designed to operate over a wide supply range from 4.2V to 60V. Theswitching 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 (MAX17692A only). Softstartlimits inrush current at startup. The MAX17692A/B supports external clock synchronization to avoid low-frequency“beats” on the input bus in systems with multiple converters. The device also has programmable frequency dithering for low-EMI, spread-spectrum operation.

Features

• 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 (MAX17692A)
• Built-In Soft-Start
• Reduces Power Dissipation
• Delivers up to 3.5W Output Power
• Frequency Fold-Back Enables Enhanced LightLoad 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 TemperatureCompensation
• Hiccup Current-Limit Protection
• Programmable EN/UVLO Threshold
• Input Overvoltage (OVI) Protection (MAX17692A)
• Over temperature Protection
• High Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

Typical applications

• IGBT Gate Drive Supplies, Isolated Power Supplies
• Industrial, PLC I/O Modules
• Telecom Applications

More information

• Datasheet
• IC product information