Hi gents,
I need you help again with TMS37157.
I designed the following according to swra395.pdf application node (see attached schematics)
The problem is, that the capacitor C11 is not charged to 15.8 V as I expected.
I can delete D3 and supply the DC/DC converter with a lab power supply and the converter works perfect.
But, I can't get it running from the NFC field.
Is this maybe an inrush effect?
Any ideas?