I noticed in using a TPS7A4700 voltage regulator to charge a battery & it keeps outputting max current until just before the set voltage is reached - when the current drops off fairly quickly. This is exactly the characteristics I want in a voltage regulator as I'm using it to quickly bring a battery to a set voltage as quickly as possible & more importantly to retain it neat to that set voltage as power is being drawn from the battery. But most voltage regs significantly reduce current output as the load approaches the set voltage.
I see in the block diagram of the TPS7A4700 a block called "fast charge" but no mention of it in the datasheet text. I guess it is a type of internal constant current control - there's no external setting for this current OR maybe the device is running at it's current limit until near the set voltage? I'm wondering if there are other Vregs that operate in this manner?
I know that a CC/CV method is recommended for charging a battery which is fine for initial charging but as I said, I want to try to maintain the battery as near to the set voltage as possible even when current is being drawn from it by a load - I guess this is dependent on where the regulator moves out of CC & into CV mode? - I want this to be as close as possible to the set voltage so even when the battery drops 0.5V, I want it to be recharged back asap.
Any thoughts? Anybody know how this is implemented inside the TPS7A470x regulators or know of other regulators (I need 1A or greater output) that have this characteristic?
I see in the block diagram of the TPS7A4700 a block called "fast charge" but no mention of it in the datasheet text. I guess it is a type of internal constant current control - there's no external setting for this current OR maybe the device is running at it's current limit until near the set voltage? I'm wondering if there are other Vregs that operate in this manner?
I know that a CC/CV method is recommended for charging a battery which is fine for initial charging but as I said, I want to try to maintain the battery as near to the set voltage as possible even when current is being drawn from it by a load - I guess this is dependent on where the regulator moves out of CC & into CV mode? - I want this to be as close as possible to the set voltage so even when the battery drops 0.5V, I want it to be recharged back asap.
Any thoughts? Anybody know how this is implemented inside the TPS7A470x regulators or know of other regulators (I need 1A or greater output) that have this characteristic?