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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.
| General Data | |
|---|---|
| Manufacturer (OEM) | Seasonic |
| Platform Model | Prime Titanium |
| Primary Side | |
| Transient Filter | 2x Y caps, 3x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | NTC thermistor & relay |
| Bridge Rectifier(s) | 2x Vishay LVB2560 (600V, 25A @ 105°C) |
| APFC MOSFETs | 2x Infineon IPP60C7099 (650V, 14A @ 100°C, 0.099Ω) |
| APFC Boost Diode | 1x STPSC10H065D (600V, 10A @ 135°C) |
| Hold-up Cap(s) | 1x Hitachi (400V, 470uF, 2000h @ 105°C, HU) 1x Hitachi (400V, 820uF, 2000h @ 105°C, HU) |
| Main Switchers | 4x Infineon IPP50R140CP (550V, 15A @ 100°C, 0.14Ω) |
| Drivers For Main Switchers | 2x Silicon Labs Si8230BD |
| APFC Controller | ON Semiconductor NPC1654 |
| Switching Controller | Champion CM6901 |
| Topology | Primary side: Full-bridge & LLC resonant converter Secondary side: Synchronous rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 6x R638 |
| 5V & 3.3V | DC-DC Converters: 6x Infineon BSC0906NS PWM Controller: APW7159 |
| Filtering Capacitors | Electrolytics: Nippon Chemi-Con (1-5000h @ 105°C, KZE), Nippon Chemi-Con (105°C, W), Nippon Chemi-Con (4000-10,000h @ 105°C, KY), Chemi-Con (5-6000h @ 105°C, KZH), Rubycon (3-6000h @ 105°C, YXG) Polymers: FPCAP, Nippon Chemi-Con |
| Supervisor IC | Weltrend WT7527V (OVP, UVP, OCP, SCP, PG ) & AS393M |
| Fan Model | Hong Hua HA13525M12F-Z (135mm, 12V, 0.36A, 1800 RPM, fluid dynamic bearing) |
| 5VSB Circuit | |
| Buck Converter | Leadtrend LD7750R |
| Rectifiers | STMicroelectronics STU6N65K3 (650V, 3A @ 100°C, 1.3Ω) Infineon BSC0906NS (30V, 40A @ 100°C, 4.5mΩ) |
| -12V Circuit | |
| Buck Converter | Lite-On LSP5523 (3A max output current ) |
Seasonic's component selection and design focus on delivering the highest efficiency possible while keeping noise output low. A full bridge topology and LLC resonant converter are used on the primary side. On the secondary side, FETs regulate the +12V rail and a couple of DC-DC converters handle the minor rails.
There is a dedicated buck converter IC for the -12V rail's rectification, rather than a plain diode. Although this rail is insignificant, it can still kill a PSU, so it's nice to see a proper IC used for its generation, enabling overload protection.
Here are some photos of the PSU’s major parts:
The following video shows the SSR-1000TR’s internals.
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