Designed similar to the discontinued MTN MAX driver
completely went from scratch just taking the same Max16820 chip as starting point
Differences to the original MTN Max:
- a lot wider ground ring and part clearance from edge on top side so it fits better with smaller pill cavity
- 6mm spring pad to fit common BLF springs, where the MTN had 5mm
- many cases the 16819 is far better to get a relative low switching frequency (the 16820 is designed for 2Mhz the 16819 has with same values only 666kHz)
- 2 1206 Resistors so its relatively easy to modify the output current, while the original resistor was not stackable at all
- design with optional double amount of Input Caps,
- up to 2 3A fly back diodes depending on the output current (same type but lower forward voltage bin)
- QFN25 Attiny25/85 replaces the MLF10 Attiny 13A
- programming port for my Pogo pin flash key
- switch and indicator Pads for Anduril
- added a low pass filter to protect MCU from any voltage spikes
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Using the formulas from the data sheet to optimize part values on 3 examples
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It is an interest list to see how much parts I order from mouser beside from prototype ones