Corsair AXi Series 1600 W Review 12

Corsair AXi Series 1600 W Review

Load Regulation, Hold-up Time & Inrush Current »

A Look Inside and Component Analysis

Before you take a look at this PSU's internal specifications below and watch a corresponding video, we strongly suggest a look at this article for a much better grasp of the internal components in a PSU. 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. For the identification of tiny parts we use a Andonstar HDMI Digital Microscope.

Corsair AX1600i Parts Description
General Data
Manufacturer (OEM)Flextronics
Platform ModelChurchill (probably)
Primary Side
Transient Filter6x Y caps, 2x X caps, 3x CM chokes, 1x DM choke, 1x MOV, 1x CAP200DG
Rectifier Diodes (Standby Mode)4x S8KC (800V, 8A @ 75°C)
Inrush Current Protection2x NTC Thermistor & 1x Relay
Totem-Pole PFC MODFETs (HEMTs)4x Transphorm TPH3205WSB (650V, 22A @ 100°C, 60mΩ)
Totem-Pole PFC Driver1x STMicroelectronics PM8834, 2x Silicon Labs Si8233AB
Totem-pole PFC MOSFETs2x Toshiba TK62J60W(600V, 61.8A @ 150°C, 33mΩ)
Hold-up Cap(s)1x Rubycon (450V, 680uF, 3000h @ 105°C, MXK)
2x Nippon Chemi-Con (450V, 470uF, 2000h @ 105°C, KMW)
Main Switchers4x 60F2094
Driver ICs2x Silicon Labs Si8233BD
Digital Control Board
Primary DSCTexas Instruments UCD3138064A
Secondary DSCNXP Freescale MC56F8236
MCUSilicon Lab C8051F380 (USB 2.0 controller)
Quadruple Op. Amps5x Texas Instruments L2902KA
Quad Differential Comparator2x Texas Instruments LM239A
Secondary Side
+12V8x 16x Infineon BSC028N06NS (60V, 83A @ 100°C, 2.8mΩ) FETs, 2x STMicroelectronics PM8834 drivers
+12V Driver ICs2x STMicroelectronics PM8834 drivers
5V & 3.3VDC-DC Converters: 8x ON Semiconductor NTMFS4C06N (30V, 14.9A @ 80°C, 6mΩ)
PWM Controller: NCP1034DG
Filtering CapacitorsElectrolytics: United Chemi-Con (1-5000h @ 105°C, KZE), United Chemi-Con (4-10,000h @ 105°C, KY), United Chemi-Con (2-8000h @ 105°C, LXZ), United Chemi-Con (1-2000h @ 105°C, KMQ), United Chemi-Con (5-6000h @ 105°C, KZH)
Polymers: United Chemi-Con, FPCAP
Fan ModelNR140P (12 V, 0.22 A, fluid dynamic bearing)
5VSB Circuit
Rectifier1x 9R1K2C (900V, 3.2A @ 100°C, 1.2Ω)
Standby PWM ControllerInfineon ICE3BS03LJG
Modular PCB
Rectifier1x SK34A SBR (40V, 3A), 2x NTMFS4C03N (30V, 136A @ 25°C, 2.8mΩ)
Filtering CapacitorsElectrolytics: 8x United Chemi-Con (6-10,000h @ 105°C, KZM), 2x United Chemi-Con (1-2000h @ 105°C, KMQ)
Polymers: 13x United Chemi-Con
At the time of the review, there were no commercial analog controllers available for a totem-pole PFC, so this design is only possible with a digital controller because of its flexible nature. Controlling a totem-pole PFC is much more difficult than a traditional APFC converter. The lack of bridge rectifiers, bidirectional inductor current, and function swap between main and sync switches are only some of the challenges engineers have to face and overcome with this converter.

The following video footage goes over the internals of the AX1600i:

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