help needed with switching power supply reliability concirns

help needed with switching power supply reliability concerns

i'm currently working on a project in which i will pwm control a lot of leds (current draw will be around 10-15 amps) and i want to power the project using a switching power supply
most likely i will be using a 5v power supply from this series:
**broken link removed**

i will be controlling all of the leds at the same time using an arduino threw a single mosfet (switching frequency will be 500-1000 Hz)
and i got worried that turning on and off a current this high might damage the power supply, am i right?
i thought of putting a big capacitor across the supply to minimize current spikes though i have a couple of questions since i'm not familiar with switching power supplies:
what voltage should it be? (i know that switching power supplies have voltage spikes or maybe those spikes are the 100mV ripple from the datasheet?) 10V? 16V?

what capacitance should it be? 10000uF? 20000uF?

could there be a problem when powering on the circuit (a very big current draw when charging the capacitor when powering on)?

i want to power the arduino from the same supply, could there be a problem when powering from the same supply that powers a power demand that big (voltage spiking or an unstable voltage because of the pwm switching of these 10-15 amps)? and what can i do about it?
maybe a capacitor next to the atmega chip?

Dear shaynet
Hello
The frequency of your switching action is very low . and it is not good . you should try to increase that , up to 40KHZ or more . thus the value of capacitor and inductor will become to the lowest .
and what is your input voltage ?
is important to you , the isolation ?
Best Regards
Goldsmith

the switching frequency is only for controlling the led's brightness! not for power conversion
i will be using a switching power supply to power my project and i'm worried about it's well being (i'm afraid that switching on and off a current draw of 15amps 1000 times a second from a switching power supply might damage it) that's why i thought of using a big capacitor to stabilize the current draw.

am i right with my concerns?

No it is not good way . as i understood , you want supply for your LED's . and you want control the on and off time of your LED's . ok ? so you can make a High frequency switching power supply with best Regulation ratio , and then you can use a mosfet with your desired frequency to control those LED's from your fix supply .
Good luck
Goldsmith

you probably missed it but i posted a link in my first post of a switching power supply that i intend to use exactly as you said
the link to it's datasheet is (i will use the 5V one): **broken link removed**
my question is whether i can power my leds with my mosfet at my desired frequency straight of it (the supply i just posted) or should i put a capacitor across the supply to make the current draw from the power supply more even?
in other words, can the supply handle 15amp pwm or maybe i need to take action to make it's life easier?