Good Point Greg. The LT3420 has Charge (CHG) pin which is essentially an enable/disable. If CHG=HIGH, device charges to set voltage. If CHG=HIGH and voltage is reached, device enters a refresh mode to regulate. CHG=LOW is low power mode. CHG can also be PWM'ed by micro to control input current to charger. It has been a year since my last version, and I may resurrect working on it cause I'd rather win! The LT3420 seem quite novel in how it measured current/voltage, but there may be a better choice in the end.
On Wednesday, May 8, 2019 at 12:16:46 AM UTC-4, gregebert wrote: > > Welcome to the club......I've never had a switching supply work exactly as > initially conceived. It always took several iterations. > > I did not spend much time going thru the datasheet because this device > looks like it's meant for pulsed, rather than continuous, operation. That > could have a large impact on how it behaves. > > First, you will need some scope pictures to get a good idea what's > happening in the circuit. > > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/da34b69a-bf78-4dab-86c7-1bf74ab41e75%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
