Part Analysis
| General Data | |
| Manufacturer (OEM) | Delta Electronics |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 6x Y caps, 4x X caps, 2x CM chokes, 4x TVS Diode, 1x MOV |
| Inrush Protection | 1x NTC Thermistor SCK-0512 (5 Ohm) & Relay |
| Rectifier(s) (Standby Mode) |
2x Taiwan Semiconductor S8JC (600V, 8A @ 75°C)
|
| Totem-Pole MOSFETs (HEMTs) |
4x Infineon IGT60R070D1 GaN (600V, 20A @ 100°C, Rds(on): 0.07Ohm)
|
| Totem-Pole Driver(s) | 4x Infineon 1EDB7275F |
| Totem-Pole PFC MOSFETs |
2x Infineon IPDQ60R010S7 (600V, 50A @ 140°C, Rds(on): 0.01Ohm)
|
| Totem-Pole PFC Driver(s) |
2x Skyworks Si8273AB & 1x Champion CM03AX (Phantom Power Remover)
|
| Bulk Cap(s) |
2x Rubycon (450V, 820uF each or 1,640uF combined, 3,000h @ 105°C, MXK)
|
| Main Switchers |
4x ANCORA E6007PD020 GaN FETs (650V, 24.2A @ 100°C, Rds(on): 0.089Ohm)
|
| IC Driver(s) | 2x Skyworks Si8238AD |
| MCUs | Texas Instrument TMS320F280049CPM & Microchip dsPIC33CH256MP206 |
| Topology |
Primary side: Digital Totem-Pole Bridgeless PFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | no info |
| 5V & 3.3V | DC-DC Converters: 4x Alpha & Omega AONS36303 (30V, 52A @ 100°C, Rds(on): 3.28mOhm) PWM Controller(s): no info |
| Filtering Capacitors | Polymer: 6x Nippon Chemi-Con, 1x APAQ, 23x no info |
| Supervisor IC | no info |
| Fan Controller | STMicroelectronics STM32G474 |
| Fan Model | Hong Hua HA13525H12SB-Z (135mm, 12V, 0.50A, Double Ball Bearing Fan) |
| 5VSB Circuit | |
| Rectifier |
1x STMicroelectronics STD10LN80K5 (800V, 5A @ 100°C, Rds(on): 0.63Ohm)
1x STMicroelectronics STD100N10F7 (100V, 62A @ 100°C, Rds(on): 8mOhm) |
| Standby PWM Controller | Leadtrend LD5762E |
The PCB is huge but provides enough space between parts for good airflow. The amount of cables leaving from one of the daughter boards to connect it with the modular board and the DC-DC converters board is something I didn’t expect in a high-end platform. All these connections should be implemented through the main PCB, not cables. These cables don’t affect airflow; the problem is mainly aesthetic. Overall, the build quality is top, and the design is interesting. I would love to see a fully digital platform, though, where the minor rails and 5VSB are digitally controlled, too.
On the primary side, GaN MODFETs regulate the AC incoming signal. The pair of bridge rectifiers handles the standby rail (5VSB). In the totem-pole PFC converter, the bulk caps are by Rubycon, and their combined capacity is enough to provide a long hold-up time. The 12V FETs are on a vertical board, which is difficult to remove so that I couldn’t identify them. I can easily remove this board, but I am not sure I will be able to install it without affecting the unit’s operation, so I decided to leave it alone.
Two large boards on the sides hold the digital controllers, the cost of which affected the unit’s price. Due to the IC shortage in the last years, MCU prices have skyrocketed, which is one reason that the Fusion 1600 goes for 700 dollars. Moreover, Delta is an expensive OEM, and since this design is new, it also has to cover a part of the development cost, which was substantial, according to my sources.
The table with the characteristics indicates the maximum power of 850 watts. It’s not a mistake?
Yes, I will fix it.