MAXREFDES1310

描述

The MAXREFDES1310 is an Electronic Load designed to test DC-DC converters without the need of large mains powered lab equipment. It can operate from 12V to 24V DC inputs supply voltage and sink up to 2.5A of current from a separate voltage input. A power metal-oxide semiconductor field-effect transistor (MOSFET) is used to sink current from the device under test, which is mounted to a heatsink with a cooling fan. The MAXREFDES1310 uses the MAX1837 buck converter to provide power to the cooling fan, and the MAX8881 low-dropout regulator (LDO) to generate a low noise voltage rail for the analog circuitry. The analog circuitry consists of the MAX44243, MAX44244, and the MAX4238 operational amplifiers which are used for an oscillator with DC offset, thermal protection with hysteresis, and current regulation of a MOSFET operating in its linear region. The MAXREFDES1310 is a standalone device which does not require a separate signal generator or microcontroller to set current values. Both the Constant Current and Transient Current mode values can be adjusted with a single potentiometer to any value within the 0A to 2.5A range. The Transient test is set to fixed 100Hz 50% step, which is suitable for most DC-DC converter load transient response testing.

优势和特点

Features

• Standalone analog design
• Small form factor
• Simple control
• Proven PCB layout