Tuppe
Member level 2
Tunnel diode in Vsupply?
Hello!
I came across this PCB schematic of SIM5320E board, that has some weird diode configurations going on. There seems to tunnel diode to ground? What do you think?
The module in this schematic is rated "4.6V-5.2V" input, although the SIM5320E Vcc(after the diodes) is rated 3.3V-4.2V, and peak current 2A. The 1N5408 seems to do some crude voltage conversion.
Does it make sense to have tunnel diode anyway? Is it actually just Zener? Schottky?
I hope someone can make sense of this configuration! Thank you for reading!
Hello!
I came across this PCB schematic of SIM5320E board, that has some weird diode configurations going on. There seems to tunnel diode to ground? What do you think?
The module in this schematic is rated "4.6V-5.2V" input, although the SIM5320E Vcc(after the diodes) is rated 3.3V-4.2V, and peak current 2A. The 1N5408 seems to do some crude voltage conversion.
Does it make sense to have tunnel diode anyway? Is it actually just Zener? Schottky?
I hope someone can make sense of this configuration! Thank you for reading!