Kolink Classic Power 400 W Review 22

Kolink Classic Power 400 W Review

Voltage Regulation Stability & Ripple »

Component Analysis

Before reading this page, we strongly suggest a look at this article, which will help you understand the insides of a PSU better.

Kolink Classic Power 400W Parts Description
General Data
Manufacturer (OEM)Casecom
PCB TypeSingle-sided
Primary Side
Transient Filter4x Y caps, 2x X caps, 2x CM chokes, 1x Champion CM02X (discharge IC)
Bridge Rectifier(s)1x GBU608 (800 V, 2.8 A @ 100 °C) (without heatsink)
Inrush Current ProtectionNTC Thermistor MF72-3D11 (3 ohm)
APFC MOSFETs1x IPS ITA08N50R (500 V, 8 A, Rds (on): 0.9 ohm)
APFC Boost Diode1x Champion CMPFCD86 (600 V, 8 A @ 140 °C)
Bulk Cap(s)2x TK (400 V, 120 uF each or 240 uF combined, 105°C, UFWHS)
Main Switchers2x IPS ITA08N50R (500 V, 8 A, Rds (on): 0.9 ohm)
PFC / PWM Combo ControllerChampion CM6800UX
TopologyPrimary side: APFC, double forward
Secondary side: synchronous rectification & DC-DC converters
Secondary Side
+12 V MOSFETs2x Oriental Semiconductor SFS06R03PF
(60 V, 160 A @ 25 °C, Rds (on): 3.5 mOhm)
Sync Power SP6019 (driver IC)
+5 V & +3.3 VDC-DC Converters:
4x UBIQ QM3004D (30 V, 40 A @ 100 °C, Rds (on): 8.5 mOhm)
PWM Controller: ANPEC APW7159C
Filtering CapacitorsElectrolytic: 11x AsiaX (105°C, TMX)
Polymer: 2x NJcon
Supervisor ICGrenergy GR8329N (OVP, UVP, OCP, PG, SC)
Fan ModelAlpine DF1202512SEMI (120 mm, 12 V, 0.20 A, sleeve bearing fan)
5VSB Circuit
Standby PWM ControllerDeveloper Microelectronics DP2358


The platform uses a double forward topology on the primary side and synchronous rectification on the secondary side, along with a pair of DC-DC converters for the generation of the minor rails, an advanced platform for this price segment. Most PSUs in this price range are group-regulated, with passive rectification for the +12 V rail. The heatsinks are relatively small, but the unit's maximum power output is low. Finally, there is ample space between the components to allow for good airflow. Don't expect to find high-end capacitors. That said, they at least used 105°C electrolytic caps for the APFC converters and the secondary side.


The EMI filter is complete and does a good job suppressing conducted EMI emissions. The only downside here, and a major one, is the lack of an MOV. A line of glue connects all parts to minimize coil whine. I didn't notice any high-pitched noise at any of the various loads throughout testing.


This is the NTC thermistor responsible for lowering inrush currents. As expected, it isn't supported by a bypass relay.


The single bridge rectifier is not bolted to a heatsink. Since this PSU is for 230 V input, this won't cause any issues.


The APFC converter uses a single IPS ITA08N50R FET and a Champion boost diode. The bulk caps are by Toshin Kogyo (TK), which is a Japanese company. Their capacity is low. Still, they offer a decent hold-up time of almost 16 ms.


The combo PFC and PWM controller is a Champion CM6800 IC that was widely used some years ago.


The main FETs, two IPS ITA08N50Rs, are installed into a double-forward topology.


The 12 V rail uses two Oriental Semiconductor SFS06R03PF FETs. The driver IC for these FETs is a Sync Power SP6019.


The two DC-DC converters use four UBIQ QM3004D FETs. The common PWM controller is an ANPEC APW7159C.


The filtering caps are by AsiaX, so they are not of high quality. That said, coming across better filtering caps in this price range doesn't happen often.


The standby PWM controller is a Developer Microelectronics DP2358 IC.


The supervisor IC is a Grenergy GR8329N: It supports all the necessary protection features but OTP.


Soldering quality is not very good, and some component leads are quite long. However, I did not encounter any issues during testing.


The sleeve bearing fan is by Alpine, a brand not that well known but quite large. The same brand makes NZXT's Aer fans.
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