namlooc
Junior Member level 3
Hi!
I'm making tracking device on sim548c.
I have a problem with understanding VBAT and VCHG pin destiny.
Please check that i'm thinking correct.
Thers two ways for supply voltage:
1.When i use supply from li-on battery:
*VCHG pin should be connected to the Li-on battery charger.
*VBAT pin should be connected to Li-on battery.
2.When i supply sim548c directly from step-down regulator LM2679, without battery.
*VCHG pin should be connected to..?!?! to where ?!
*VBAT pin should be connected to 5V LM2679
My circuit is power supplied within LM2679, please tell mi what should i do with VCHG pin ??
**broken link removed**
**broken link removed**
Datasheet suggest:
**broken link removed**
**broken link removed**
**broken link removed**
**broken link removed**
I'm making tracking device on sim548c.
I have a problem with understanding VBAT and VCHG pin destiny.
Please check that i'm thinking correct.
Thers two ways for supply voltage:
1.When i use supply from li-on battery:
*VCHG pin should be connected to the Li-on battery charger.
*VBAT pin should be connected to Li-on battery.
2.When i supply sim548c directly from step-down regulator LM2679, without battery.
*VCHG pin should be connected to..?!?! to where ?!
*VBAT pin should be connected to 5V LM2679
My circuit is power supplied within LM2679, please tell mi what should i do with VCHG pin ??
**broken link removed**
**broken link removed**
Datasheet suggest:
**broken link removed**
**broken link removed**
**broken link removed**
**broken link removed**