Overview / Main Features
Delta DPS-700GB is a 700W power supply for 1U format rackmount server application.
Rackmount Servers - PC/Server OEMs
Pricing - Found online at the time of writing for ~$140 USD from one e-tailer (May 2009)
Availability - Assumed worldwide.
For the purposes of this teardown analysis, we have assumed a lifetime production volume of 300K units.
As a reminder, teardown volume production assumptions are primarily used for our cost analysis in terms of amortized NRE and tooling costs, especially for custom components specific to the model being analyzed (mechanical components especially). Unless assumed volumes are different by an order of magnitude, minor changes in volume (say 1 million vs. 2) rarely have a large net effect on our final analysis because of this.
Main Cost Drivers Representing ~49% of total materials cost
STP20NM60FD - ST Microelectronics - MOSFET - N-Channel, 600V, 20A (Qty:4)
Inductor - Wound Toroid, Powdered Iron Core, Vertical (Qty:5)
FDP047AN08A0 - Fairchild Semiconductor - MOSFET - N-Channel, 75V, 15A (Qty:4)
Plotech Co. Ltd - 2-Layer - FR4 (Qty:2)
- K-Bridge Electronics Co. Ltd -
UCC3895DW - Texas Instruments - PWM Controller - Phase-Shift, BiCMOS
Heatsink - Extruded / Machined Aluminum, w/ Thermal Paste (Qty:3)
Enclosure, Main, Bottom Frame - Stamped / Formed Steel, 2 Pieces, Riveted, w/ 4 Pressed-In Threaded Metal Inserts
SPP20N60C3 - Infineon - MOSFET - N-Channel, 650V, 20.7A, w/ Ferrite Bead on Lead (Qty:2)
Delta Electronics - Transformer - Wound Bobbin, Vertical, EE Core
Ceramic Multilayer - X5R/X7R (Qty:123)
Materials, Manufacturing and Margin $55.59
What Is Not Included in our Cost Analysis
The total materials and manufacturing costs reported in this analysis reflect ONLY the direct materials cost (from component vendors and assorted EMS providers), AND manufacturing with basic test. Not included in this analysis are costs above and beyond the material manufacture of the core device itself - cost of intellectual property, royalties and licensing fees (those not already included into the per component price), software, software loading and test, shipping, logistics marketing and other channel costs, and the margin of resellers. Our cost analysis is meant to focus on those costs incurred in the manufacture of the core device and exceptionally in some circumstances the packaging and literature as well.
Country of Origin / Volume Assumptions
This power supply is manufactured by Delta, more than likely in their own facilities, as is typically the case for power supply manufacturers. The unit was labeled as 'product of China' and we have assumed that this applies at all levels of assembly within the power supply.
Country of origin assumptions relate directly to the associated cost of manufacturing, where calculated by iSuppli. In the cases of 'finished' sub-assemblies (such as hard drives), we do not calculate internal manufacturing costs, but rather assess the market price of the finished product in which case country of origin assumptions may or may not have a direct effect on pricing.
Remember also that labor rates are applied directly only to hand inserted components and systems in our bill of materials, and although regional assumptions do, these new rates do not have a direct effect on our modeled calculations of placement costs for automated SMD assembly lines. "Auto inserted components (such as SMT components) placement costs are calculated by an iSuppli algorithm which allocates a cost per component based on the size and pincount of the device. This calculation is affected by country or region of origin as well.
Design for Manufacturing / Device Complexity
This power supply does not seem exceptionally complicated or dense as designs go, and having analyzed other similar power supplies for the same application type - the component selection and count seem 'in line' with competing units, but definitely at the high end of this spectrum.
After all 700W is a lot of power for a small amount of space - and the unit is (like others) densely packed with components). The total component count for the Delta DPS-700GB is 831.
Major components in the Delta DPS-700GB A include:
- MOSFET - Fairchild Semiconductor - FDP047AN08A0 - N-Channel, 75V, 15A
- PWM Controller - Texas Instruments - UCC3895DW - Phase-Shift, BiCMOS
- MOSFET - ST Microelectronics - STP20NM60FD - N-Channel, 600V, 20A