This power supply was on 24/7 in a store for several years until it started to show symptoms of failure. I opened it to find that nearly every cap inside has failed, including the small 1uF 50V ones! 
You can easily conclude that this psu was never going to do 420watt. Just notice the PBL405 bridge rectifier, good for 4A, at the same time the psu has setting for 115V, this is just unacceptable for a brand like Thermaltake.
Moreover, I found another version of the psu label on the web that states "Total Output Power: 350W"
Next thing that caught my eye was that stupid valley fill PFC voltage booster add on board that does nothing but generate extra unwanted heat and cook the 2 unlucky small 400V 2.2uF caps.
https://www.badcaps.net/forum/attach...1&d=1389575653
I immediately remove/disable that circuit every time I see it.
The psu uses old half bridge topology featuring UTC TL494L PWM controller and TPS3510P supervisor IC.
The main switching transistors are E13009 made by Fairchild semiconductor and they come in TO-3P package. This is good enough for 350W continuous, but whether they are going to do 420W without blowing, depends on the design and main transformer size and primary capacitors real capacity. The main transformer is ERL-35 and the primary caps are OST 820uF 200V but their real capacity was 633uF and 655uF, clearly outside the 20% tolerance.
I have to confess I don't have any objections about the secondary of this power supply. All the voltage lines have pi coils installed, the toroid coils are big enough for 350W, and the caps are reasonably sized:
3.3V: 2x2200uF 6.3V JunFu HK
5V: 2x2200uF 10V JunFu HK
12V: 1x330uF (no, it's not a typo, it's 330uF!) 16V JunFu & 1x3300uF 16V OST RLP
5vsb: 1x470uF 10V OST RLP & 1x 1000uF 10V OST RLS
-12V: 1x220uF 16V JunFu HK
The secondary silicon is impressive too:
STPS3045CW, 30A @ 3.3V
2x STPS2045CT, 40A @ 5V
STTH3002C, 30A @ 12V
The caps are a mix of OST and JunFu. There are 2 failure modes. Either the caps were found completely dried, or had too high esr and low capacity. There are no survivors, except some small caps next to the 2 ICs.
Searching the OEM for this thing I found a review in Russian. Here is the corresponding part translated:
Today we look at the power supply ISO-450PP. This power supply is manufactured by ISO Electronics (Mingbo) Co. LTD, a member of the CWT Group, whose headquarters is in Taiwan, and two factories producing power supplies and power converters - in China.
If you look at the photos, it is the same unit in a different case with smaller heatsinks and without fan controller.
http://www.ixbt.com/power/psu/iso-450pp.shtml
I also found that video but I am unable to find the review: http://www.youtube.com/watch?v=OqQyjLbPj90
What do you think?
You can easily conclude that this psu was never going to do 420watt. Just notice the PBL405 bridge rectifier, good for 4A, at the same time the psu has setting for 115V, this is just unacceptable for a brand like Thermaltake.
Moreover, I found another version of the psu label on the web that states "Total Output Power: 350W"
Next thing that caught my eye was that stupid valley fill PFC voltage booster add on board that does nothing but generate extra unwanted heat and cook the 2 unlucky small 400V 2.2uF caps.
https://www.badcaps.net/forum/attach...1&d=1389575653
I immediately remove/disable that circuit every time I see it.
The psu uses old half bridge topology featuring UTC TL494L PWM controller and TPS3510P supervisor IC.
The main switching transistors are E13009 made by Fairchild semiconductor and they come in TO-3P package. This is good enough for 350W continuous, but whether they are going to do 420W without blowing, depends on the design and main transformer size and primary capacitors real capacity. The main transformer is ERL-35 and the primary caps are OST 820uF 200V but their real capacity was 633uF and 655uF, clearly outside the 20% tolerance.
I have to confess I don't have any objections about the secondary of this power supply. All the voltage lines have pi coils installed, the toroid coils are big enough for 350W, and the caps are reasonably sized:
3.3V: 2x2200uF 6.3V JunFu HK
5V: 2x2200uF 10V JunFu HK
12V: 1x330uF (no, it's not a typo, it's 330uF!) 16V JunFu & 1x3300uF 16V OST RLP
5vsb: 1x470uF 10V OST RLP & 1x 1000uF 10V OST RLS
-12V: 1x220uF 16V JunFu HK
The secondary silicon is impressive too:
STPS3045CW, 30A @ 3.3V
2x STPS2045CT, 40A @ 5V
STTH3002C, 30A @ 12V
The caps are a mix of OST and JunFu. There are 2 failure modes. Either the caps were found completely dried, or had too high esr and low capacity. There are no survivors, except some small caps next to the 2 ICs.
Searching the OEM for this thing I found a review in Russian. Here is the corresponding part translated:
Today we look at the power supply ISO-450PP. This power supply is manufactured by ISO Electronics (Mingbo) Co. LTD, a member of the CWT Group, whose headquarters is in Taiwan, and two factories producing power supplies and power converters - in China.
If you look at the photos, it is the same unit in a different case with smaller heatsinks and without fan controller.
http://www.ixbt.com/power/psu/iso-450pp.shtml
I also found that video but I am unable to find the review: http://www.youtube.com/watch?v=OqQyjLbPj90
What do you think?
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