1st Player Steampunk PS-850SP 850 W Review

Name: 1st Player Steampunk PS-850SP 850 W
Brand: 1STPLAYER
Price: 90 USD

crmaris

on Jan 5th, 2022,

in Power Supplies.

Manufacturer: 1STPLAYER

Voltage Regulation Stability & Ripple »

Component Analysis

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

1st Player Steampunk Gold 850 W Parts Description
General Data
Manufacturer (OEM)	Helly Technology
PCB Type	Double-Sided
Primary Side
Transient Filter	4x Y caps, 3x X caps, 2x CM chokes, and 1x MOV
Bridge Rectifier(s)	2x
Inrush Current Protection	NTC Thermistor (MF72-10D15) (10 ohm) & Relay
APFC MOSFETs	2x Oriental Semiconductor OSG55R140FF (550 V, 14.5 A @ 100 °C, Rds (on): 0.14 ohm)
APFC Boost Diode	1x Basic Semiconductor B1D08065K (650 V, 9.5 A @ 150 °C)
Bulk Cap(s)	1x Nichicon (400 V, 680 uF, 2,000 h @ 105 °C, GL)
Main Switchers	2x SI24N50F
APFC Controller	Champion CM6502UHHX
Switching Controller	Champion CM6901X
Topology	Primary Side: APFC, half-bridge & LC converter Secondary Side: synchronous rectification & DC-DC converters
Secondary Side
+12 V MOSFETs	4x NCE Power NCEP40T20A (40 V, 150 A @ 100 °C, Rds (on): 1.6 mOhm)
+5 V & +3.3 V	DC-DC Converters: 2x Excelliance MOS EMB03N03HR (30 V, 45 A @ 100 °C, Rds (on): 3 mOhm) 2x Excelliance MOS EMB06N03HR (30 V, 45 A @ 100 °C, Rds (on): 6 mOhm) PWM Controller(s): 2xANPEC APW7073
Filtering Capacitors	Electrolytic: 3x Nippon Chemi-Con (1–5,000 h @ 105 °C, KZE) 3x Rubycon (3–6,000 h @ 105 °C, YXG 1x Rubycon (6–10,000 h @ 105 °C, ZLJ) Polymer: 31x
Supervisor IC	Weltrend WT7527V (OCP, OVP, UVP, SCP, PG)
Fan Model	Yate Loon D14SH -12 (140 mm, 12 V, 0.70 A, sleeve bearing fan)
5VSB Circuit
Rectifier(s)	1x 45R20S SBR
Standby PWM Controller	Excelliance MOS Corp EM8569C

This platform is by Helly, and 1st Player is its retail brand. The design is clean, without wires blocking airflow, and there is sufficient space between parts. The heatsinks are not large, especially on the secondary side. Lastly, soldering quality is good, and with the exception of the cooling fan, the parts Helly used are of high quality. I am not a big fan of Yate Loon. A Globe Fan or Hong Hua fan would have been a much better choice despite the increase in cost.

The transient filter starts on the AC receptacle with two Y caps and a single X caps and continues on the main PCB with the other parts.

Two Metal Oxide Varistors (MOV) handle voltage surges, while an NTC thermistor suppresses large inrush currents. A bypass relay supports the latter.

The bridge rectifiers are bolted together to a dedicated heatsink.

The APFC converter uses two Vishay FETs and a single CREE boost diode. The bulk caps are by Rubycon and have a combined capacity of 660uF.

The APFC controller is a Champion CM6502UHHX.

The two main switching FETs are installed in a half-bridge topology, and an LLC resonant converter is used for higher efficiency. The resonant controller is a Champion CM6901X.