malik_123
Member level 4
i am using lmc660c quad op am IC
when i run the circuit by external tranformer based dual power supply having +/- 12
volts
it consumes just 2 mA
but when i run it buy the 5 to +/- 15 volt DC DC converter it started taking
about 54 ma from DC DC converter
i am unable to understand why it do so ?
the max limit of the input voltage of the IC is +/- 16 volts
one thing is the dc dc converter no load voltage are about 20 volts which decrease to +/- 15 volts under the loaded conditions provided the current sourced by the dc dc converter is less the 30 ma
can some one guess what could be the problem
with the transformer based supply it consumes just 3 ma and from the dc dc converter its sinks more then 54 ma
when i run the circuit by external tranformer based dual power supply having +/- 12
volts
it consumes just 2 mA
but when i run it buy the 5 to +/- 15 volt DC DC converter it started taking
about 54 ma from DC DC converter
i am unable to understand why it do so ?
the max limit of the input voltage of the IC is +/- 16 volts
one thing is the dc dc converter no load voltage are about 20 volts which decrease to +/- 15 volts under the loaded conditions provided the current sourced by the dc dc converter is less the 30 ma
can some one guess what could be the problem
with the transformer based supply it consumes just 3 ma and from the dc dc converter its sinks more then 54 ma