2951 - LDO voltage regulator. 40mV drop voltage. Can be fixed and adjusted version. I'm using 3.3 and 5.0 versions.
About 73843. If you want to use single li-ion cell, I greatly recommend to use 5V fixed voltage to supply 73843. It working like a usual linear voltage regulator. It can be overheated and burned.
Sure!Should I use LM2951 LDO in between PIC MCU and Li-Ion Battery?
Not a good idea. It depends of your charge current. In case of 500mA and 9V supply voltage from adapter, you will have a (0.5x(9-5)) 2W of heat on 7805.Shall I use L7805 to power the MCP73843?thanks
Not a good idea. It depends of your charge current. In case of 500mA and 9V supply voltage from adapter, you will have a (0.5x(9-5)) 2W of heat on 7805.
I edited my first post. Watch there.If so, which IC should I use to supply fixed 5v to MCP73843 IC?
The charge current depends of current sense resistor value, MOSFET open resistance, supply voltage resistance and battery resistance. What capacity of battery you planing to use? For 1Ah recommended charge current will be about 500mA and 1A for fast charge. Even 2A will be ok.We can supply up to 1A (fast charging) to Li-Ion using MCP73843 IC.
Only if you will use it with external powerful transistor to power dissipation with very large radiator.Shall I use same LM2951/LM2941 IC to regulate fixed +5v to MCP73843 IC from +9v AC/DC adopter?
2951 - LDO voltage regulator. 40mV drop voltage. Can be fixed and adjusted version. I'm using 3.3 and 5.0 versions.QUOTE]
Is it mandatory to use LDO between Li-Ion battery and PIC MCU?
Suggestion needed pl?
Step down more efficient, but produce a lot of noise. So, you'll have to use a low-pass filter with capacitors.
For example, you can't use battery with ARM because it need very stable 3.3V supply and even some times 1.8V (actual for NXP2xxx).
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