T
treez
Guest
Hello,
We are going to use the Meanwell HRPG-600-48 PSU (48V, 13A, Offline) to power our four 105W Buck LED drivers. (Iout=3A, Vout = 35V, fsw = 200KHz, CCM, non-synchronised)
All the four LED drivers, when considered together, only have 80uF of input capacitance, due to PCB room constraints.
Therefore, as you can imagine, most of the ripple current for the input of these 4 LED drivers is going to get drawn from the output capacitor bank of the HRPG-600-48 PSU.
The thing is, if the HRPG-600-48 PSU has an output LC filter, then that means that most of the ripple current will be drawn from just the load-side capacitor bank of the HRPG-600-48 (since the filter inductor , if big enough, will prevent the ripple being drawn from the capacitor bank on the converter side of the output filter inductor )
Meanwell will not supply us with a schematic of the HRPG-600-48 , so we cannot find out…..
1…whether or not it has an output inductor.
2…How big this inductor is. (uH)
3….What is the ripple current rating of the capacitor bank at the load side of the output filter inductor
Do you know of any other manufacturer of a similar PSU that will also supply us with the schematic an bill of materials of their PSU?
Another reason why we need the PSU schematic is because when our load is suddenly switched on, the no-load to full-load transient will inevitably make the output LC filter of the HRPG-600-48 ring wildly and the output voltage of the HRPG-600-48 will resonate up to high voltages which could damage our LED drivers.
Therefore, we really do need the schematic so that we can assess this.
So do you know of any other manufacturer of a similar PSU that will also supply us with the schematic an bill of materials of their PSU?
HRPG-600-48 Datasheet (48V, 13A PSU)
**broken link removed**
We are going to use the Meanwell HRPG-600-48 PSU (48V, 13A, Offline) to power our four 105W Buck LED drivers. (Iout=3A, Vout = 35V, fsw = 200KHz, CCM, non-synchronised)
All the four LED drivers, when considered together, only have 80uF of input capacitance, due to PCB room constraints.
Therefore, as you can imagine, most of the ripple current for the input of these 4 LED drivers is going to get drawn from the output capacitor bank of the HRPG-600-48 PSU.
The thing is, if the HRPG-600-48 PSU has an output LC filter, then that means that most of the ripple current will be drawn from just the load-side capacitor bank of the HRPG-600-48 (since the filter inductor , if big enough, will prevent the ripple being drawn from the capacitor bank on the converter side of the output filter inductor )
Meanwell will not supply us with a schematic of the HRPG-600-48 , so we cannot find out…..
1…whether or not it has an output inductor.
2…How big this inductor is. (uH)
3….What is the ripple current rating of the capacitor bank at the load side of the output filter inductor
Do you know of any other manufacturer of a similar PSU that will also supply us with the schematic an bill of materials of their PSU?
Another reason why we need the PSU schematic is because when our load is suddenly switched on, the no-load to full-load transient will inevitably make the output LC filter of the HRPG-600-48 ring wildly and the output voltage of the HRPG-600-48 will resonate up to high voltages which could damage our LED drivers.
Therefore, we really do need the schematic so that we can assess this.
So do you know of any other manufacturer of a similar PSU that will also supply us with the schematic an bill of materials of their PSU?
HRPG-600-48 Datasheet (48V, 13A PSU)
**broken link removed**