Part Analysis
| General Data | |
| Manufacturer (OEM) | SAMA |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 6x Y caps, 3x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 1x NTC Thermistor 5D-20 (5 Ohm @ 25°C) & Relay |
| Bridge Rectifier(s) |
2x GBU1508 (800V , 15A @ 40°C)
|
| APFC MODFETs |
2x Infineon IPP50R140CP (550V, 15A @ 100°C, Rds(on): 0.14Ohm)
|
| APFC Boost Diode |
1x CRMicro CRXF10D065G2 (650V, 9A @ 135°C)
|
| Bulk Cap(s) |
1x Nichicon (400V, 1,000uF , 2,000h @ 105°C, GG(M))
|
| Main Switchers |
4x WG B60R190
|
| APFC Controller |
1x Champion CM6500UNX
|
| Resonant Controller |
1x Champion CM6901T6X
|
| Topology |
Primary side: APFC, Full-Bridge & LLC Resonant converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x 014N04A |
| 5V & 3.3V | DC-DC Converters: 4x WG N08V30 PWM Controller(s): 1x ANPEC APW7159C |
| Filtering Capacitors | Electrolytic: 4x Nippon Chemi-con (@ 105°C, W), 1x Nichicon (4-10,000 @ 105°C, HE) 1x Nippon Chemi-con (4-10,000 @ 105°C, KY), 2x Rubycon (4-10,000 @ 105°C, YXJ), 2x Rubycon (6-10,000 @ 105°C, ZLH), 1x Rubycon (2-10,000 @ 105°C, YXF) Polymer: 22x FPCAP |
| Supervisor IC | Esthome EST.7610F (OVP, UVP, FPOB, PGO) |
| Fan Power Transistor | STMicroelectronics 2SD882 |
| Fan Model | Endofy Fluctus 10-1037 (120mm, 12V, 0.15A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Low Side Rectifier |
1x SB1060L SBR (60V, 10A @ 25°C)
|
| Standby PWM Controller | Chipown PN8141 |
The PCB is small, but thanks to the increased number of vertical boards hosting various circuits, there is enough space between parts to allow for decent airflow. The design features a full-bridge topology on the primary side and an LLC resonant converter controlling the main FETs on the primary and the 12V FETs on the secondary side. The minor rails are regulated through two DC-DC converters, which take power from the 12V rail.
The transient filtering stage has six Y caps, three X caps, and two CM chokes. The conducted EMI emissions testing will show how well (or not) it does its job. Typically, it starts at the AC receptacle and continues on the main PCB.
A MOV handles voltage surges. The NTC thermistor’s resistance is 5 ohms, and a bypass relay supports it.
Two bridge rectifiers are installed in parallel to balance the loads.
An APFC converter increases the power factor and provides a wide input voltage range. The converter utilizes Infineon IPP50R140CP FETs and a single CRMicro boost diode. The bulk cap is by Nichicon. Its capacity is 1,000uF and is rated for 2,000 h at 105 °C.
The APFC controller is a Champion CM6500UNX.
The four WG B60R190 primary switching FETs are installed in a full-bridge topology, and an LLC resonant converter is used for higher efficiency.
The resonant controller is a Champion CM6901T6X.
The main transformer that lowers the APFC’s DC bus voltage (around 380 VDC) to much lower levels, closer to 12V.
Eight 014N04A FETs regulate the 12V rail. They are installed on the business side of the PCB, and several vertical heatsinks cool them.
Two DC-DC converters generate the minor rails. The standard PWM controller is an ANPEC APW7159C.
Rubycon, Chemi-con, and Nichicon provide the electrolytic filtering capacitors. FPCAP makes the polymer caps.
You can find more information about capacitor performance and other specs below:
The supervisor controller is an Esthome EST.7610F.
The standby PWM controller is a Chipown PN8141.
Several polymer caps at the face of the modular panel form a ripple-filtering layer.
The soldering quality is decent.
The cooling fan is an Endofy Fluctus 10-1037 fan, using a fluid dynamic bearing.
