General Description
The MAX17498A/MAX17498B/MAX17498C devices are current-mode fixed-frequency flyback/boost converters with a minimum number of external components. They contain all the control circuitry required to design wide input voltage isolated and nonisolated power supplies. The MAX17498A has its rising/falling undervoltage lockout (UVLO) thresholds optimized for universal offline (85V AC to 265V AC) applications, while the MAX17498B/MAX17498C support UVLO thresholds suitable to low voltage DC-DC applications.
Benefits and Features
⦠Peak Current-Mode Converter
⦠Current-Mode Control Provides Excellent
Transient Response
⦠Fixed Switching Frequency
â 250kHz: MAX17498A/MAX17498C
â 500kHz: MAX17498B
⦠Flexible Error Amplifier to Regulate Both Positive
and Negative Outputs
⦠Programmable Soft-Start to Reduce Input Inrush Current
⦠Programmable Voltage or Current Soft-Start
⦠Power-Good Signal (PGOOD)
⦠Reduced Power Dissipation Under Fault
â Overcurrent Protection
â Thermal Shutdown with Hysteresis
⦠Robust Protection Features
â Programmable Current Limit
â Input Overvoltage Protection
⦠Optimized Loop Performance
â Programmable Slope Compensation
⦠High Efficiency
â Low RDSON, 175mI, 65V Rated Internal
n-Channel MOSFET
â No Current-Sense Resistor
⦠Optional Spread Spectrum
⦠Space-Saving, 16-Pin (3mm x 3mm) TQFN Package
Applications
Front-End AC-DC Power Supplies for Industrial Applications (Isolated and Nonisolated)
Telecom Power Supplies
Wide Input Range DC Input Flyback/Boost Industrial Power Supplies
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