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Maxim Integrated MAX17498B | Demoboard MAXREFDES111#

MAXREFDES111#: Isolated 24V to 5V 2W Flyback Power Supply

Overview

TopologyFlyback Converter
Input voltage18-36 V
Switching frequency470-530 kHz
Output 15 V / 0.5 A

Description

MAXREFDES111# has an efficient flyback topology with 24V input, and a 5V output at 2W of power (0.4A). The design features the MAX17498B, a peak-current-mode converter with internal n-channel MOSFET switch. This entire circuit fits on a 36mm x 20mm (1.4in x 0.8in) board.

Features

  • Peak Current-Mode Converter
  • Current-Mode Control Provides Excellent Transient Response
  • Fixed Switching Frequency
  • 250kHz: MAX17498A/MAX17498C
  • 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
  • Overcurrent Protection
  • Thermal Shutdown with Hysteresis
  • Robust Protection Features
  • Programmable Current Limit
  • Input Overvoltage Protection
  • Optimized Loop Performance
  • Programmable Slope Compensation
  • High Efficiency
  • Low R DSON , 175mI, 65V Rated Internal
  • n-Channel MOSFET
  • No Current-Sense Resistor
  • Optional Spread Spectrum
  • Space-Saving, 16-Pin (3mm x 3mm) TQFN Package

Typical applications

  • Front-End AC-DC Power Supplies for Industrial Applications (Isolated and Nonisolated)
  • Telecom Power Supplies
  • Industrial Power Supplies
  • Wide Input Range DC Input Flyback/Boost Industrial Power Supplies

Products

Order Code Data­sheet Downloads Product seriesVinVOut1
(V)
IOut1
(mA)
fswitch
(kHz)
L1
(µH)
NPRI : NSEC : NAUXISAT1
(A)
VT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
Mount Samples
750315847SPEC
1 files MID-FLYMAX Flyback Transformers for Maxim Integrated 18 - 36 V (DC) 5 500 500 11.2 1.75:1 1.25 625 10 12.21 5.97 SMT
Order Code Data­sheet
750315847SPEC
Samples
Order Code Data­sheet Downloads Product seriesVinVOut1
(V)
IOut1
(mA)
fswitch
(kHz)
L1
(µH)
NPRI : NSEC : NAUXISAT1
(A)
VT
(V (AC))
L
(mm)
W
(mm)
H
(mm)
Mount Samples