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!


The OEM of this unit is Super Flower, and the P2-1000 uses exactly the same platform as the Leadex 1000 W unit we already reviewed. The primary side uses four main switching fets and an LLC resonant converter, while the secondary side utilizes a synchronous design and two small DC-DC converters that generate the minor rails.


The transient filter starts at the AC receptacle with a single X cap. The second part of the same filter is on the main PCB and consists of two CM chokes, two X xaps, two pairs of Y caps, and an MOV. We also found a Transient Voltage Suppression (TVS) diode, so protection against spikes and power surges is adequate.


There are two parallel bridge rectifiers (Shindengen US30K80R) for higher efficiency through reduced energy losses on these.


The APFC section has three Infineon IPP50R140CP fets and two C3D06060A boost diodes—the second is bolted to the opposite side of the heatsink. The two parallel hold-up caps are right in front of aforementioned fets and are provided by Nippon Chemi-Con (400 V, 470 μF and 560 μF, 105°C, KMQ series). Our hold-up tests show that their combined capacity, 1030 μF, easily covers the needs of this unit. An NTC thermistor, responsible for protection against large inrush currents, is near the bulk caps, and the small white box in front of it is an electromagnetic relay that isolates it from the circuit once the start-up phase finishes.


An NCP1653A IC is installed on this small vertical board. As you can see, the whole board is covered by tape for EMI shielding.


The standby PWM controller is an ICE3B0565 IC, and it is well hidden by the APFC transformer.


The main switchers, four IPP50R199CP fets, are bolted onto two small diagonal heatsinks.


The LLC resonant controller is installed on a vertical daughter-board, and the marking on it, AA9013, doesn't reveal much about its specifications.


On the secondary side are three small vertical heatsinks with the middle one being empty. The one on the side hosts eight fets in total (4x IPP041N04N and 4x IPP023N04N). Spread amongst these heatsinks are six polymer Chemi-Con caps filtering the +12V rail. Some more electrolytics are used for the same purpose.


These are the DC-DC converters that generate the minor rails.


The 5VSB rail is rectified by a Mospec S10C60C SBR (Schottky Barrier Rectifier). The fan control board is installed right next to it, and on it is an LM324ADC.


Several polymer and electrolytic caps—all provided by Chemi-Con—on the front of the modular PCB provide some extra ripple filtering to the rails. We should mention that the EVGA SuperNOVA G2 1000 W uses inferior CapXon caps here to reduce cost.


Soldering quality in general is good, although not as good as that of the high-end competition (Flextronics, Delta and Seasonic). But Super Flower is taking large steps forward over previous implementations here, and we think that they will soon catch up to the competition in this area.


The cooling fan is the same as in the G2-1000. It is equipped with double ball-bearings and is made by Hong Hua. Its model number is HA1425M12B-Z, and it is rated for 0.36A at 12 V. This fan can achieve 1600 RPM at full speed, but it will only engage once things get really hot if you pick ECO Mode (semi-passive operation). Speed is only rarely increased while the unit is operating normally, even under tough conditions.