Topology and teardown
Channel Well Technology (CWT) is the OEM for all RMx Shift models. The same manufacturer also builds the RMx devices. The RMx Shift models have a completely different layout than the RMx, as the side-mounted modular panel required changes to the board. Other than that, most of the parts used by Corsair are the same as the RMx, including the PFC and LLC resonant regulators, the 5VSB circuit, the housekeeping IC, and the PWM regulators of the DC-DC converters. The 750W and 850W units use smaller boards than the 1000W and 1200W units, but the layout is the same.
Build quality is high, and Corsair has used premium parts to achieve high performance and increased reliability. The main differences between the 750W and 850W models and the 1000W and 1200W models are the topology on the primary side. The former use a half-bridge topology, while the latter use a full-bridge topology that enables higher output power while keeping energy losses under control. All models are equipped with LLC resonant converter, which increases efficiency.
The APFC and resonant regulators, the DC-DC converters that generate the shunts, the 5VSB circuitry, the supervisor IC, the fan controller, and the fan are the same in all Shift models. The main differences are in the bridge rectifiers, the FETs, the NTC thermistors, the bulk caps, the filter caps on the secondary side and the fan. Corsair has decided to ditch the ML fan on the RMx unit in favor of the NR140P FDB fan that Hong Hua supplies. Now let’s take a look at the inside of the power supply, the components and PCBs:
Component overview
Finally, I have once again listed all the components used for the interested readers:
General Data | |
Manufacturer (OEM) | CWT |
PCB Type | Double-Sided |
Primary Side | |
Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
Inrush Protection | 1x NTC thermistor SCK25150 (15 Ohm) & relay |
Bridge Rectifier(s) |
2x LVB2560 (600V, 25A @ 105°C)
|
APFC MOSFETs |
3x Infineon IPA60R099P6 (600V, 24A @ 100°C, Rds(on): 0.099Ohm) &
1x Sync Power SPN5003 FET (for reduced no-load consumption) |
APFC Boost Diode |
2x On Semiconductor FFSP0865A (650V, 8A @ 155°C)
|
Bulk Cap(s) |
2x Nippon Chemi-Con (400V, 560uF & 680uF each or 1,240uF compined, 2,000h @ 105°C, KMR)
|
Main Switchers |
4x Infineon IPA60R125P6 (600V, 19A @ 100°C, Rds(on): 0.125Ohm)
|
Driver IC(s) |
Champion CM6500UN
|
Digital Controllers | Champion CU6901VAC |
Topology |
Primary
side: APFC, Full-bridge & LLC converter Secondary side: Synchronous Rectification & DC-DC converters |
Secondary Side | |
+12V MOSFETs | 8x Infineon BSC014N06NS (60V, 152A @ 100°C, Rds(on): 1.45mOhm) |
5V & 3.3V | DC-DC Converters: 4x UBIQ QN3107M6N (30V, 70A @ 100°C, Rds(on): 2.6mOhm) PWM Controllers: UPI-Semi uP3861P |
Filtering Capacitors | Electrolytic: 4x Nichicon (2-5,000h @ 105°C, HD), 1x Nichicon (5-6,000h @ 105°C, HV), 1x Nippon Chemi-Con (1-5,000h @ 105°C, KZE), 1x Nippon Chemi-Con (4-10,000h @ 105°C, KYA), 4x Nichicon (4-10,000h @ 105°C, HE) Polymer: 29x FPCAP, 11x Nippon Chemi-Con |
Supervisor IC | World trend WT7502R |
Fan controller | Microchip PIC16F1503 |
Fan Model | Corsair NR140P (140mm, 12V, 0.22A, Fluid Dynamic Bearing Fan) |
5VSB Circuit | |
Rectifier |
1x PS1045L SBR (45V, 10A)
|
Standby PWM controller | On-Bright OB2365T |
- 1 - Einführung, technische Daten und Testreport
- 2 - Unboxing, Kabel und Schutzschaltungen
- 3 - Teardown: Topologie, Komponenten, Verarbeitung
- 4 - Load Regulation, Ripple Suppression, Transient Resonse
- 5 - Hold-Up Time, Timings, Inrush-Current
- 6 - Average Efficiency and PF
- 7 - Betriebsgeräusch und Lüfter
- 8 - Zusammenfassung und Fazit
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