antknee
New Member
I recently bought a car audio kit based upon the LM1875. The kit works ok at the 100KHz I use but I have noticed something I want to understand.
I connect the kit to a +/- 25V supply through a mains transformer and whether I use a load at 4 ohms or no load at all the voltage output stays at 12Vpp
I connect the kit to two PP3 batteries supplying dual +/-9V and this time if I connect a 4 ohm load the voltage drops from 12Vpp to 7Vpp.
Why is this?
Thanks.
I connect the kit to a +/- 25V supply through a mains transformer and whether I use a load at 4 ohms or no load at all the voltage output stays at 12Vpp
I connect the kit to two PP3 batteries supplying dual +/-9V and this time if I connect a 4 ohm load the voltage drops from 12Vpp to 7Vpp.
Why is this?
Thanks.