MAX17692B

PRODUCTION

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

Reduce Solution Size and Component Count by Up to 30%

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • 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 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 (MAX17692A)
    • Overtemperature Protection
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

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 integrated nMOSFET 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 required to 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. 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 (MAX17692A only). Softstart limits 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.

The MAX17692A/B allows temperature compensation for variations in the output rectifier diode forward voltage drop. The MAX17692A is internally compensated for loop stability, while the MAX17692B offers external loop compensation flexibility. The MAX17692A/B has robust hiccup- protection and thermal protection schemes, and is available in a space-saving 12-pin, 3mm x 3mm TDFN package with a temperature range from -40°C to +125°C.

Applications

  • Isolated Power Supplies
  • PLC I/O Modules
  • IGBT Gate Drive Supplies
  • Industrial and Telecom Applications
MAX17692B
4.2V–60V, No-Opto Isolated Flyback Converter with Integrated FET
MAX17692A, MAX17692B: Typical Application Circuit
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Documentation

Data Sheet 1

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Software Resources

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Tools & Simulations

EE-Sim Power® Tools 1

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

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Evaluation Kits

MAX17692AEVKIT

Evaluation Kit for the MAX17692A 5V Output-Voltage Application

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Features and Benefits

  • 18V to 36V Input Range
  • Isolated Output: 5V/0.65A DC
  • Compact Design with High Switching Frequency (145kHz)
  • 87% Peak Efficiency
  • Resistor Programmable Input Enable/UVLO Protection
  • Resistor Programmable Input Overvoltage Protection
  • Internal Loop Compensation Reduces Need for External Components
  • 15ms Soft-Start Time
  • Temperature Compensated Output Voltage Over -40°C to +125°C Operating Temperature
  • Provision to External Clock Synchronization and Frequency Dithering
  • VCC Overdrive to Improve Efficiency
  • Minimum Number of External Components
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17692AEVKIT# evaluation kit (EV kit) provides a proven design to evaluate the performance of the MAX17692A IC. This fully assembled and tested circuit is implemented using the MAX17692A, the No-Opto flyback converter with an integrated 76V nMOSFET available in a 12-pin TDFN package with an exposed pad. The IC data sheet provides a complete description of the part and should be read in conjunction with this EV kit data sheet prior to operating the EV kit.

The MAX17692AEVKIT# EV kit output is configured for an isolated +5V and provides up to 0.65A of output current over an 18V to 36V input range. The device switches at a 145kHz switching frequency. The EV kit regulates the output voltage within ±5% over line, load, and temperature by sensing the output voltage on the primary-side. The converter does not need an optocoupler for the isolated output voltage sensing.

Applications

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

MAX17692BEVKIT

Evaluation Kit for the MAX17692B 5V Output-Voltage Application

Buy Now View Details

Features and Benefits

  • 18V to 36V Input Range
  • Isolated Output: 5V/0.65A DC
  • Compact Design with High Switching Frequency (145kHz)
  • 87% Peak Efficiency
  • Resistor Programmable Input Enable/UVLO Protection
  • External Loop Compensation with Design Flexibility
  • 15ms Soft-Start Time
  • Temperature Compensated Output Voltage Over -40°C to +125°C Operating Temperature
  • Provision to External Clock Synchronization and Frequency Dithering
  • VCC Overdrive to Improve Efficiency
  • Minimum Number of External Components
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17692BEVKIT# evaluation kit (EV kit) provides a proven design to evaluate the performance of the MAX17692B IC. This fully assembled and tested circuit is implemented using the MAX17692B, the No-Opto flyback converter with an integrated 76V nMOSFET available in a 12-pin TDFN package with an exposed pad. The IC data sheet provides a complete description of the part and should be read in conjunction with this EV kit data sheet prior to operating the EV kit.

The MAX17692BEVKIT# EV kit output is configured for an isolated +5V and provides up to 0.65A of output current over 18V to 36V input range. The device switches at a 145kHz switching frequency. The EV kit regulates the output voltage within ±5% over line, load, and temperature by sensing the output voltage on the primary-side. The converter does not need an optocoupler for the isolated output voltage sensing.

Applications

  • IGBT Gate Drive Supplies
  • Industrial and Telecom Applications
  • Isolated Power Supplies
  • PLC I/O Modules
MAX17692AEVKIT
Evaluation Kit for the MAX17692A 5V Output-Voltage Application
MAX17692BEVKIT
Evaluation Kit for the MAX17692B 5V Output-Voltage Application

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