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Teardown & Component Analysis
Before proceeding with this page we strongly encourage you to a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss. Our main tools for disassembling PSUs are a Thermaltronics soldering and rework station and a Hakko FR-300 desoldering gun. Finally, for the identification of tiny parts we use an Andonstar HDMI digital microscope.
| General Data | |
|---|---|
| Manufacturer (OEM) | CWT |
| Platform Model | - |
| Primary Side | |
| Transient Filter | 6x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x CM02X |
| Inrush Protection | NTC Thermistor & Relay |
| Bridge Rectifier(s) | 2x Vishay LVB2560 (600V, 25A @ 105°C) |
| APFC MOSFETs | 2x Toshiba TK25A60X (600V, 25A @ 150°C, 0.105Ω) |
| APFC Boost Diode | 2x CREE C3D10060A (600V, 10A @ 153°C) |
| Hold-up Cap(s) | 2x Nichicon (400V, 680uF, 2000h @ 105°C, GG) |
| Main Switchers | 4x A25N60EFL |
| Driver ICs | 2x Silicon Labs Si8230BD |
| APFC MCU | Texas Instruments UCD3138A (31.25 MHz, 32-bit ARM7TDMI-S processor, 32KB flash, 4KB RAM, 3x feedback loop control, 14-bit DAC, up to 2 MHz switching frequency) |
| USB Interface MCU | Microchip PIC32MX230F064D (40 MHz, 64KB flash, 13x analog channels, 10-bit ADC) |
| LLC Resonant MCU | Texas Instruments UCD3138A (31.25 MHz, 32-bit ARM7TDMI-S processor, 32KB flash, 4KB RAM, 3x feedback loop control, 14-bit DAC, up to 2 MHz switching frequency) |
| Topology | Primary side: interleaved PFC, full-bridge & LLC resonant controller Secondary side: synchronous rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x Infineon BSC014N06NS (60V, 100A @ 100°C, 1.45mΩ) |
| 5V & 3.3V | DC-DC Converters: 5x FETS PWM Controller: 1x |
| Filtering Capacitors | Electrolytics: Nippon Chemi-Con (1-5000 @ 105°C, KZE), Nippon Chemi-Con (4-10,000 @ 105°C, KY) Polymers: CapXon, Su'scon, APAQ |
| Supervisor IC | Weltrend WT751002 (OVP, UVP, PG) |
| Fan Model | Thermaltake TT-1425 (Hong Sheng OEM, A1425S12S-2, 140mm, 12V, 0.70A, hydrodynamic bearing, RGB LED lighting) |
| 5VSB Circuit | |
| Rectifiers | ISD04N65A, SPN5003 (N-channel enhancement mode FET) & PS1045L SBR |
| Driver IC | Texas Instruments UCC27324 |
This is an almost completely digital platform, since the entire primary side and most likely the +12V FETs are handled by digital controllers.
A full bridge topology and an LLC resonant converter are used on the primary side. On the secondary side, there's a synchronous rectification scheme for the +12V rails, and both minor rails are handled by voltage regulation modules.
The cooling fan is pretty strong. However, its software profile is relaxed for such a high-capacity PSU.
Very few electrolytic filtering caps are used on the secondary side, with the majority of ripple filtering being handled by polymer caps. We noticed few CapXon polymer caps, which aren't among our top choices. However, polymer caps are much more resilient than electrolytic ones, so these CapXon caps probably won't be an issue in the long run. Still, we'd like to see top-end components in such an expensive PSU.
The following footage shows the TPI-1200F2FDP's internals.
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