Deepcool PX850G PSU Review

Part Analysis

General Data
Manufacturer (OEM) CWT
Platform CSZ
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush Protection 1x NTC Thermistor SCK-075 (7 Ohm) & Relay
Bridge Rectifier(s)
2x GBJ1506 (600V, 15A @ 100°C)
2x Infineon IPA60R125P6 (600V, 19A @ 100°C, Rds(on): 0.125Ohm) &
1x Champion CM03X (for reducing the no-load consumption)
APFC Boost Diode
1x Infineon IDH08G65C6 (650V, 8A @ 145°C)
Bulk Cap(s)
1x Nippon Chemi-Con (420V, 330uF, 2,000h @ 105°C, KMR)
1x Rubycon (420V, 470uF, 2,000h @ 105°C, MXE)
Main Switchers
2x Infineon IPA60R190P6 (600V, 12.7A @ 100°C, Rds(on): 0.19Ohm)
APFC Controller
Champion CM6500UNX
Resonant Controller Champion CU6901VAC
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 8x Infineon BSC014N04LS (40V, 125A @ 100°C, Rds(on): 1.4mOhm)
5V & 3.3V DC-DC Converters: 2x UBIQ QN3107M6N (30V, 70A @ 100°C, Rds(on): 2.6mOhm) &
2x UBIQ QM3054M6 (30V, 61A @ 100°C, Rds(on): 4.8mOhm)
PWM Controller(s): uPI-Semi uP3861P
Filtering Capacitors Electrolytic: 2x Nippon Chemi-Con (105°C, W), 1x Nichicon (2-5,000h @ 105°C, HD), 1x Nichicon (5-6,000h @ 105°C, HV), 1x Nippon Chemi-Con (2-5,000h @ 105°C, KZE), 1x Rubycon (4-10,000h @ 105°C, YXJ), 2x Nippon Chemi-Con (4-10,000h @ 105°C, KYA), 1x Rubycon (4-10,000h @ 105°C, YXF)
Polymer: 27x FPCAP
Supervisor IC Weltrend WT7502R (OVP, UVP, SCP, PG)
Fan Controller Microchip PIC16F1503
Fan Model Hong Hua HA13525H12SF-Z (135mm, 12V, 0.5A, Fluid Dynamic Bearing Fan)
5VSB Circuit
1x D10S45L SBR (45V, 10A)
Standby PWM Controller On-Bright OB2365T

This is the omnipresent CSZ platform CWT provides, used in many high-capacity ATX v3.0 PSUs. The design uses analog controllers for all circuits. A half-bridge topology and an LLC resonant converter are on the primary side. The secondary side utilizes a synchronous rectification scheme with ten Infineon FETs generating the 12V rail and two VRMs for the minor rails.

The cooling fan is by Hong Hua and uses a fluid dynamic bearing for lower noise output and increased reliability. Lastly, the build quality is high; the same goes for the soldering quality. At the solder side of the PCB, CWT also enhanced some PCB traces with copper plates, for better conductivity and lower power losses, at high loads.

I won’t stand anymore in this section since I have already described CWT’s CSZ platform in many of my reviews.

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4 thoughts on “Deepcool PX850G PSU Review

  1. Did you notice any coil whine with this PSU? I bought a Corsair Rm850x and it has a slight steam whistle type noise even while idle.

      1. Oops I meant the Rm850e.

        Is coil whine generally common amongst most PSUs? I noticed that the capacitors on the Rm850e are non-japanese, could that be a contributing factor?

        Thank you

        1. in general for me, since I have lots of test systems, coil whine has to do mostly with the graphics card in use and the current use (e.g. game menu or desktop)

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