Hello to all.
I am in possession of a ZAPCO sp2000.1 which has the burned power supply.
I have already fixed this, and I realized that the signal on the GATE of the power supply mosfet is variable based on how much power is required by the amplifier, for this reason, the power supply is REGULATED type.
Just out of curiosity, but why does a manufacturer decide to adopt a regulated or unregulated PS?
what are the advantages and disadvantages of both?
Can a regulated power supply be converted into an unregulated power supply and vice versa?
I am in possession of a ZAPCO sp2000.1 which has the burned power supply.
I have already fixed this, and I realized that the signal on the GATE of the power supply mosfet is variable based on how much power is required by the amplifier, for this reason, the power supply is REGULATED type.
Just out of curiosity, but why does a manufacturer decide to adopt a regulated or unregulated PS?
what are the advantages and disadvantages of both?
Can a regulated power supply be converted into an unregulated power supply and vice versa?
Not a complete list.
Regulated
slightly more complex
Could require more expensive components like inductors to work properly
Unreg
Simple
likely cheaper
The regulated supply has the ability to produce double the power each time the load resistance is cut in half.
'Regulated' can be defined in several ways. It could simply be an over-voltage protection to prevent the rail voltage from going too high with high B+ voltages. A regulated supply could also be so precise that it can maintain the target voltage for all speaker loads at all power levels with a wide range of input voltages (11-14v, for example).
Regulated
slightly more complex
Could require more expensive components like inductors to work properly
Unreg
Simple
likely cheaper
The regulated supply has the ability to produce double the power each time the load resistance is cut in half.
'Regulated' can be defined in several ways. It could simply be an over-voltage protection to prevent the rail voltage from going too high with high B+ voltages. A regulated supply could also be so precise that it can maintain the target voltage for all speaker loads at all power levels with a wide range of input voltages (11-14v, for example).
In my case, I think that the regulation is implemented to ensure that the voltages of the rail never falls too low, moreover it ensures that even if there are low voltage drops (about 1.5-2v compared to the normal 14volt) the rail voltages always remains the same, or almost.
here is the diagram of the power supply driver board.
+RAIL-SEN &-RAIL-SEN reach the rails through 100K and 91K RESISTORS.
My question is, if in this amplifier, I convert the power supply from "REGULATED" to "NOT REGULATED", what can happen?
here is the diagram of the power supply driver board.
+RAIL-SEN &-RAIL-SEN reach the rails through 100K and 91K RESISTORS.
My question is, if in this amplifier, I convert the power supply from "REGULATED" to "NOT REGULATED", what can happen?
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In general, it depends on the max input voltage, the winding ratio of the transformer and the ability of the secondary side components to withstand the higher voltage. Why do you want to remove the regulation?
NO, I do not want to remove the regulation, but I'm curious to know if an amplifier that normally works with a regulated power supply, can, possibly, also work with an unregulated power supply.
Suppose the secondary side components are sized to support a higher voltage, could it be done?
Could I lose power from the amp? or not?
Suppose the secondary side components are sized to support a higher voltage, could it be done?
Could I lose power from the amp? or not?
You would not lose power. The supply would be at full output. You may gain some power at lighter loads (lighter than the lowest rated load). You're working with a class D but for non-switching amps, the output transistors may run much hotter than when regulated.
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