MAX17690EVKITA

Description

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The MAX17690A evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the operation of an isolated 5W no-opto flyback DC-DC converter with secondary-side synchronous rectification. This circuit is implemented using the MAX17690, a no-opto, flyback controller in a 16-pin TQFN package with an exposed pad. The synchronous rectification on the secondary side is enabled by replacing the secondary diode with a MOSFET to achieve 89.5% efficiency. The circuit uses the MAX17606, a secondary-side synchronous rectifier driver in a 6-pin SOT23 package for driving the secondary-side MOSFET.

The EV kit output is configured for an isolated +5V and provides up to 1A of output current. The EV kit is programmed to operate at a 150kHz switching frequency. The transformer provides the galvanic isolation between input and output, up to 1875V_RMS. The EV kit regulates the output voltage within ±5% over the line, load, and temperature without using the auxiliary winding/optocoupler for output voltage feedback.

Get Started with No-Opto Flyback Technology and the MAX17690

Key Features

• 18V to 36V Input Range
• Isolated Output: 5V/1A DC
• Compact Design with High Frequency (150kHz) Switching
• No Optocoupler/Third Winding Required to Derive Feedback Signal
• 90% Peak Efficiency
• Galvanic Isolation up to 1875V_RMS
• Proven PCB Layout
• Fully Assembled and Tested
• Minimum Load for ±5% Regulation: 1% of Full-Load

Applications/Uses

• Industrial and Telecom Applications
• Isolated Flyback Converters
• PLC I/O Modules
• Wide-Range DC-Input Isolated Power Supplies