A Look Inside & Component Analysis

Before reading this page, we strongly suggest a look at this article, which will help you understand the internal components of a PSU much better. Our main tool for the disassembly of the PSU is a Thermaltronics TMT-9000S soldering and rework station. It is of extreme quality and is equipped with a matching de-soldering gun. With such equipment in hand, breaking apart every PSU is like a walk in the park!


Utilizing a modern design where an LLC converter in the primary side boosts the unit's efficiency, this PSU is based on the same platform as the G series. The secondary side uses DC-DC converters with a semi-synchronous design for the rectification of the minor rails.


Behind the AC receptacle is a small PCB with four Y caps, one X cap, and a CM choke. On the main PCB are two additional CM chokes, two Y caps, a single X cap, and an MOV.


The single bridge rectifier, a GPU10V08, is installed on a dedicated heatsink. This bridge rectifier can handle up to 10 A of current, which easily covers the needs of this PSU.


In the APFC, two Infineon IPP50R399CP fets and an STTH8S06D boost diode are used. The hold-up cap is provided by Hitachi (270 µF, 420 V, 105°C, HU series). Right in front of it is the thermistor responsible for protection against large inrush currents.


The vertical daughter-board in the second photo houses an ICE2HS01G resonant controller (large IC on the left) and an ICE3PCS01 PFC controller (small IC on the right).


Two Infineon IPP50R399CP fets are used as primary switchers.


The secondary side uses a semi-synchronous rectification scheme where two PSMN2R6-40YS fets and two SBR10U45 Schottky diodes rectifying the +12V rail are installed on the solder side of the main PCB. A heatsink on the component side assists in lowering their operational temperature. Finally, the minor rails are generated by two DC-DC converters.


We find many filtering polymer caps by Enesol and several electrolytic Chemi-Con and Rubycon caps, all rated at 105°C, in the secondary side.


The standby PWM controller is an Infineon ICE2QR4765 IC. A SBR10U45 Schottky diode on the solder side of the main PCB rectifies the 5VSB rail.


Among the very few monitoring ICs that supports OTP (Over Temperature Protection) out of the box, the supervisor IC is a SITI PS223.


Soldering quality is very good, especially for a mainstream unit.


The cooling fan isn't provided by Adda like in the G units, but by Jamicon (120 mm, 12 V, 0.35 A). Its model number is KF1225B1HR-R. It is a fan of good quality since it uses ball-bearings, which will have the fan last longer than sleeve-bearing fans.