Fractal Design NEWTON R3 1000 W Review 6

Fractal Design NEWTON R3 1000 W Review

Voltage Regulation, Hold-up Time & Inrush Current »

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 better. Our main tool for the disassembly of the PSU is a Thermaltronics TMT-9000S soldering and rework station. It is of extremely high quality and is equipped with the matching soldering gun. With such equipment in hand, breaking apart every PSU is like a walk in the park!

The OEM of the PSU is ATNG, a manufacturer we encountered last in the In Win Glacier 900 W review. The platform is modern, and the primary side has an LLC converter that boosts efficiency, while the secondary side uses synchronous rectification and two DC-DC converters that generate the minor rails.

A small PCB behind the AC receptacle holds many of the transient filter's components - namely, three X caps, four Y caps, and a CM choke. The transient filter continues on the main PCB with two X caps and a CM choke. Behind the bride are two Y caps and an MOV. The latter is usually placed before the bridge rectifier for protection against surges.

The two parallel bridge rectifiers are bolted together on the APFC/primary heatsink. Their model number is U15K80R, and we couldn't find any information for them on the web.

In the APFC, two Infineon IPW60R125CP are used along with two CREE C3D10060 boost diodes. The hold-up caps are two parallel Rubycons (270 µF each or 540 µF combined, 400V, 105°C). Their combined capacity is pretty low for the 1 kW max power that this unit can deliver. The PFC controller is a 2PCS01 IC that has been installed on the solder side of the main PCB.

The main switchers are two SPW32N50C3 fets. They are assisted by an LLC converter.

The secondary side utilizes synchronous rectification for the generation of the +12V rail, and eight IPP023N04N fets are used. Ripple filtering on this rail is taken care of by a bunch of Teapo and Nippon Chemi-Con electrolytic caps - all of them rated at 105°C - and two polymer Enesol caps between the DC-DC converters.

The minor rails are generated by two DC-DC converters. We find a CAT7523 PWM controller along with two fets on each one.

The supervisor IC is located on the solder side of the main PCB, and its model number is GR8313. It only provides two protections (OVP and UVP). We didn't expect to see such a low-end supervisor IC in a high-end PSU.

The circuit that controls the fan's speed is located on a small PCB bolted onto the secondary heatsink. The IC that can be seen on the photo above is an LM393 voltage comparator. The fan speed control circuit also receives temperature information from two thermistors installed on the secondary heatsink.

The markings on the standby PWM controller have been erased fully, but we think that it is a TNY277 IC.

Several thick wires transfer the main rails and provide earth to the modular PCB. No caps for further ripple suppression have been installed to the front of the same PCB, although there is enough room for three of them.

Soldering quality on the main PCB is good overall, although there are several spots with soldering joints that don't look so good.

The cooling fan carries Fractal's logo, but we are pretty sure that it is made by another company, most likely Globe Fan. We also suspect that it is the same fan that the In Win Glacier 900 W uses, so its model number is RL4Z B1352512H (12 V, 0.33 A, 106.86 CFM, 1500 RPM, 29.2 dBA). Finally, a triangular plastic baffle has been attached to the fan to direct airflow towards the front of the PSU.
Next Page »Voltage Regulation, Hold-up Time & Inrush Current