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NIMH overnight or slow charger

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akoh

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Hi I am a noob. Can anyone recommend me a slow(or overnight ) charger IC or schematic as follows;-

1) Constant Charging current of 200-250mA
2) Charging time between 12-15 hrs at 1/10C where C is the NIMH capacity
3) DV/DT detection cut off.
4) *no thermistor requirement.(if there is a thermistor just replace with fix resistor)

Applications:
NIMH is use as back up...meaning most of the time it is drawing less than 1mA for the MCU and self discharge losses. normal discharge(about 500mA) occured only when mains AC fails.

Thank you in advance

A.K.
 

hi akoh,

kindly see the below link it may help u to develop... the application..:)



akoh said:
Hi I am a noob. Can anyone recommend me a slow(or overnight ) charger IC or schematic as follows;-

1) Constant Charging current of 200-250mA
2) Charging time between 12-15 hrs at 1/10C where C is the NIMH capacity
3) DV/DT detection cut off.
4) *no thermistor requirement.(if there is a thermistor just replace with fix resistor)

Applications:
NIMH is use as back up...meaning most of the time it is drawing less than 1mA for the MCU and self discharge losses. normal discharge(about 500mA) occured only when mains AC fails.

Thank you in advance

A.K.
Click to expand...
 

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