Part Analysis
| General Data | |
| Manufacturer (OEM) | CWT |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 6x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | NTC Thermistor SCK-0510 (5 Ohm @ 25°C) & Relay |
| Rectifier MOSFETs |
4x Toshiba TK055U60Z1 (600V, 40A @ 25°C, Rds(on): 0.055Ohm)
|
| APFC MOSFETs |
2x Infineon IPA60R120P7 (650V, 26A @ 25°C, Rds(on): 0.120Ohm)
|
| APFC Boost Diode |
Infineon IDH10G65C6 (650V, 10A @ 140°C)
|
| Bulk Cap(s) |
2x Nippon Chemi-Con (420V, 470uF each or 940uF combined, 2000h @ 105°C, KMQ)
|
| Main Switchers |
4x Alpha & Omega AOTF29S50 (600V, 29A @ 25°C, Rds(on): 0.15Ohm)
|
| APFC Controller | Champion CM6500UNX & Sync Power SPN5003 (reducing no-load consumption) |
| Resonant Controller |
Champion CM6901T2X
|
| IC Driver | 2x Novosense NSI6602BD |
| Topology | Primary side: Bridgeless PFC, Full-Bridge & LLC Resonant Converter Secondary side: [12V] Synchronous Rectification & [Minor Rails] DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 4x Infineon BSC010N04LS (40V, 206A @ 100°C, Rds(on): 1.0mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x UBIQ Semi QN3107M6N (30V, 70A @ 100°C, Rds(on): 2.6mOhm) PWM Controller(s): UPI-Semi uP3861P |
| Filtering Capacitors | Electrolytic: 7x Rubycon (3-6,000 @ 105°C, YXS) 3x Rubycon (4-10,000 @ 105°C, YXJ) Rubycon (10,000 @ 105°C, YXM) Nichicon (4-10,000 @ 105°C, HE(M)) Polymer: 30x Nippon Chemi-Con, 12x FPCAP |
| Supervisor IC | Weltrend WT7518 (OVP, UVP, OCP, PG) |
| MCU / Fan Controller | Nuvoton MS51FB9AE |
| Fan Model | BQ SIW4-13525-MF (135mm, 12V, 0.4A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Rectifier (High Side) |
Dongke DK5V45R10V (45V, 10mOhm)
|
| Standby PWM Controller |
On-Bright OB2365T
|
CWT supplies this platform with a modern architecture that incorporates bridgeless APFC to minimize energy losses and a full-bridge topology for improved power-handling capability. The primary side also features an LLC resonant converter, further boosting overall efficiency. The PCB uses standard-to-large dimensions and is laid out with acoustics in mind, avoiding crowding in favor of generous component spacing—especially on the secondary side—to promote optimal airflow. Notably, the electrolytic capacitors are positioned well away from major heat sources, significantly enhancing their expected lifespan. In typical CWT fashion, the secondary-side heatsinks are relatively modest in size, as are those on the primary side, with the largest heatsink dedicated to the APFC stage.
All components are sourced from well-established manufacturers, as cost is clearly not a limiting factor for this flagship product line. Infineon FETs, in particular, rank among the best in the industry, delivering outstanding performance and long-term reliability.
The transient filtering stage contains all the necessary components to block both incoming and outgoing EMI emissions. Typically, it starts at the AC receptacle and continues on the main PCB.
There is an MOV to protect from voltage surges and an NTC thermistor with a resistance of 5 ohms. Moreover, a bypass relay supports the NTC thermistor.
Instead of using conventional bridge rectifiers for AC input handling, this platform relies on four Toshiba TK055U60Z1 FETs, which offer significantly lower conduction losses than the diodes found in traditional bridges. This approach is both highly effective and costly, making it a common choice in Titanium-class platforms where minimizing primary-side energy losses is a top priority.
The APFC converter uses two Infineon IPA60R120P7 FETs and a single Infineon IDH10G65C6 boost diode. Chemi-Con manufactures the bulk capacitors. Their combined capacity is 940 μF, and both are rated for 2,000 hours at 105 °C. The voltage rating is 420V, providing a large enough margin from the APFC’s DC bus voltage (approximately 380-400V DC).
The APFC controller is a Champion CM6500UNX. The Sync Power SPN5003 supports it to reduce vampire power.
Four Alpha & Omega AOTF29S50 primary-switching FETs are used in a full-bridge topology (the same as in the 1000/1200W model), and an LLC resonant converter is employed for enhanced efficiency.
The LLC resonant controller is a Champion CM6901T2X.
The PSU’s main transformer. One of its main functions is to electrically isolate the primary and secondary sides.
Four Infineon BSC010N04LS FETs regulate the 12V rail. They are installed on the business (top) side of the PCB, and two small heatsinks handle their cooling.
Two DC-DC converters generate the minor rails. They use four UBIQ Semi QN3107M6N FETs. The PWM controller is a UPI-Semi uP3861P.
Rubycon and Nichicon provide the electrolytic capacitors. FPCAP and Chemi-Con make the polymer capacitors.
You can find more information about capacitor performance and other specs below:
The standby PWM controller is an On-Bright OB2365T.
Many polymers and a large electrolytic capacitor on the modular panel’s face form an additional ripple-filtering layer.
The supervisor IC is a Weltrend WT7518 (OVP, UVP, OCP, PG). It is installed on the modular board.
The fan controller is a Nuvoton MS51FB9AE.
Soldering quality is good in most areas. The area under the 12V FETs is the “worst”- looking, but it will in no way affect the unit’s performance or reliability.
The cooling fan is a BQ SIW4-13525-MF that uses a fluid-dynamic bearing. This is a high-quality fan!
Leakage current graph is for the 1000W models so wrong graph used here, too bad your graphs don’t include Pure Power 13 M , that model seems to be a better value and maybe better unit than this.
BQ can snatch loyal Seasonic and Corsair users with these 2025 models, good job from them. Thanks for the review!
Do you think that the Dark Power 14 worth the premium over the Pure Power 13 M?
…in addition, Pure Power has more compact dimensions 160 vs 175 (Dark Power) and fits into e.g. Lancool 207, or Sugo 14, while Dark Power does not 😉