System Board 6261

MAXREFDES112#: ISOLATED 24V TO 12V 10W

FLYBACK POWER SUPPLY

Overview

Maxim's power supply experts have designed and built a series of isolated, industrial

power-supply reference designs. Each of these power supplies efficiently converts 24V

into useful voltage rails at a variety of power levels. Every power rail is isolated with a

readily available transformer from multiple, global vendors, providing for quick, convenient

transformer selection. Each design has been tested for load and line regulation, as well as

efficiency and transient performance. As with all Maxim reference designs, the BOM,

schematics, layout files, and Gerber files are all available. In addition, boards are available

for purchase; most boards feature through-hole pins for immediate board placement and

accelerated prototyping.

MAXREFDES112# is an efficient flyback topology with 24V input, and a 12V output at

10W of power (0.8A). The design features the MAX17596, a peak-current-mode converter

with flexible switching frequency. This entire circuit fits on a 20.3mm (0.8in) x 59.7mm

(2.35in) board.

Features

• Functional insulation

• Compact and flexible

• Minimal external components

• Robust operation in adverse industrial environments

• 12V 800mA with 20% over range current

• ±5% output accuracy