L200 current source mosfet matching circuit. -
Use 12 volts for IC1 (STMicroelectronics L200) Vsupply.
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Digital voltmeter to three decimal places at 2 to 6 volts recommended.
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Current set to 500mA (higher current cause device heating).
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Mount DUTs on common heatsink as per picture.
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Allow reading to stabilize (about 10 seconds) before noting value.
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Once close matches have been ascertained retest those matches to get best fits.
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