750103

The 750103 is an evaluation kit for LT3573, an isolated monolithic flyback switching regulator with an integrated 1.25A NPN power switch. This device significantly simplifies the design of a flyback converter since it does not require a third winding or opt isolator and can sense the output voltage directly from the primary side flyback waveform. The LT3573 operates in boundary mode, which is a variable frequency current mode switching scheme, resulting in a total regulation band of ±5% over a wide input voltage range and output load current in a typical application. Boundary mode operation also permits the use of a smaller transformer when compared to equivalent continuous conduction mode designs. The output voltage is easily set by two external resistors.

• Input voltage range of 3V to 40V
• No transformer, third winding or opto isolator required for feedback
• Long term reliability voltage control
• Same external parts for different output voltages
• Current mode control
• Programmable soft start
• Boundary mode operation
• Onboard 1.25A, 60V Integrated NPN power switch
• Adjustable current limit

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