With TI TPS54260 chip of switch power supply, 12 v power supply output 33 v is no problem, into a 5 v power supply, the output current limit, want to heighten limit, don't know what I need to change is COMP compensation pin, or change the RT/CLK frequency change switch?

Changed the switching frequency, achieved the purpose of increasing output current limit, but feel right way,

Want to change the COMP pin, but I don't know to want to increase or decrease resistance capacity, a COMP pin switch current voltage contrast how to do? What is this principle? Have a great god to explain

CodePudding user response:

I wanted to know if adjusting the COMP external R260, C725, C726, how to adjust? Increase or decrease, and why?

CodePudding user response:

To increase the output current is a key element to inductance parameters to adjust, otherwise it might damage the circuit,

CodePudding user response:

refer to the second floor the wise know already should good karma response:

increase the output current is a key element to inductance parameters to adjust, otherwise it might damage the circuit,

The inductance of the discharge no problem, but how to adjust current limit

CodePudding user response:

Don't understand what you mean, from the description has to adjust to the maximum, can again big? Is the limit of the device.
If still don't have enough current to use, can use two parallel power supply, does not only depend on adjusting the established method of circuit parameters,
Common questions, the thinking of this is unclear to the electronic circuit, this thinking is wrong, is not mature, not feasible,
Flow is a method of expanding, is by no means by regulating elaborated and can improve the output current of thought, such as two-way parallel power supply, using high power tube expanding flow change inductance parameters, is the correct way of thinking,

CodePudding user response:

COMP pin is make compensation and protection, he limit is the peak current, if you put it big words will not affect pipe and circuit protection. Adjust the switching frequency should be more reasonable some. If you feel the need to change COMP the circuit, I think you need to change the capacity is big, because he according to the equivalent value of output current charge and discharge, the same time, the capacitance current is bigger, the greater the need.

CodePudding user response:

Do you want to control current maximum output?

CodePudding user response:

TPS54260 with Eco - Mode? The input, 3.5 V and 60 V 2.5 A step-down converter
See if title is step-down converter, use the wrong

CodePudding user response:

Thanks for your reply, and finally found A power supply chip is input/output differential pressure is insufficient, can't meet current with 2.5 A output, so there will be A voltage drop