DC/DC Converters provide plug-and-play operation.
Press Release Summary:
LSN D12 non-isolated DC/DC converters accept 12 V inputs (10.8 to 13.2 V input) and deliver 1, 1.2, 1.5, 1.8, 2, 2.5, 3.3, or 5 V outputs rated at 10 A. Single-In-Line packages can be configured in vertical or horizontal orientations. Fully synchronous, fixed-frequency buck topology delivers 96% efficiency for 5VOUT models, low noise (30-50 mVp-p), and tight line/load regulation (±0.1%/±0.25% max). All models provide full power to at least +50°C with no supplemental air flow.
Original Press Release:
12Vin, 10A DC/DC Converters Facilitate New Architectures for On-Board Power
96% Efficient, "Dollar-an-Amp" DC/DC's Tackle the "Last Mile" in Low-Cost, Point-of-Load Power Processing
- DATEL's New LSN D12 Series
- Inputs: 12V ±10% (10.8-to-13.2 Volts)
- Outputs: 1/1.2/1.5/1.8/2/2.5/3.3/5 Volts @ 10 Amps
- Package: 2" x 0.55" x 0.34" SIP with Standard Pinout
Vertical Models Occupy 0.7 Square Inches
Horizontal Models Only 0.34 Inches High
- Ease-Of-Use: True Plug-and-Play Convenience
No Expensive I/O Filtering
No Auxiliary Cooling
Fully EMC/EMI Compliant
- Performance: Tight Accuracy, ±1.25%
High Efficiency, to 96%
Low Output Noise, 30-50mVp-p
Full Power to +50°C w/o Air Flow
- Cost: Prices Start @ $9.95 (USA, 50k pieces)
- IEC/UL/EN60950 Certified; EMC/EMI Compliant
- Order On-Line @ www.datel.com
It's the Money...Sir!
The insatiable demand for higher performing IC's has spawned a heretofore unthinkable assortment of "standard" supply voltages and associated currents. Today's system boards often require 6-7 voltages (0.8V, 1V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V, etc.) at individual currents ranging from 2 to 60 Amps. Consequently, the days of a "power supply per voltage" are numbered as such straightforward power delivery simply costs too much. Parallel, isolated power paths from backplanes onto system boards are redundant and no longer affordable.
The latest advancement in distributed power, the most cost-effective power-delivery solution to date, consists of on-board 12V busses supplying power to numerous non-isolated, step-down, buck regulators. See Backgrounder. The basic elements are: 1) a single isolated DC/DC converter coming onto the board, 2) an on-board 12V bus/plane, and 3) multiple, non-isolated DC/DC's (often located at their point of load) tapping into the 12V plane.
Where Do DATEL's LSN D12's Fit?
DATELs new LSN D12 Series SIP's are non-isolated DC/DC converters that accept 12V inputs (10.8V to 13.2V input range) and deliver 1V, 1 .2V, 1.5V, 1.8V, 2V, 2.5V, 3.3V or 5V outputs rated at 10 Amps. The LSN's single-in-line (SIP) packages (2" x 0.55" x 0.34", 51 x 14 x 8.64mm) can be configured in either vertical or horizontal orientations. The former occupies a mere 0.7 square inches. The latter is a mere 0.34 inches (8.64mm) high.
LSN D12's are true "plug-and-play" power converters enabling power-system architects to configure solutions literally in minutes. In most applications, LSN's require no external I/O filtering to achieve either specified noise levels or FCC-compliant radiated/conducted emissions. They are designed with on-board input/output caps fully rated to handle the necessary input ripple current and fully capable of reducing output noise to specified levels.
And They're Very Affordable
Not needing transformers, optocouplers and complicated FET drive circuits in their secondary, non-isolated DC/DC's are considerably cheaper than their isolated brethren. LSN D12 Series SIP power converters are attractively priced at $19.90 (USA) each in singles and $11.90 each for 10k pieces. 50k+ pieces go for $9.95 each...a buck an Amp!
Topology...Performance...Temperatures...Features
The D12 LSN's best-in-class power density is achieved with a fully synchronous, fixed-frequency, buck topology that delivers: high efficiency (96% for 5VOUT models), low noise (30-50mVp-p), tight line/load regulation (±0.1%/±0.25% max.), quick step response (100microsec), stable no-load operation (for circuits going into "sleep" mode), and no output reverse conduction.
High efficiency enables LSN SIP's to deliver more output current at temperature than virtually all competing devices. All models deliver full power to at least +50°C with no supplemental air flow. With minimal air flow (100 lfm), all models operate at full power to at least +67°C.
The LSN feature set includes output overcurrent detection, continuous short-circuit protection, a ±10% output-voltage trim function, a remote on/off control pin, and an output sense pin.
Availability
Free LSN D12 sample/evaluation units for qualified OEM's, and/or pre-production quantities up to 25 pieces, are immediately available from stock. Production quantities require 6-8 weeks.
Order @ Web Site
DATEL, Inc. pioneered e-commerce capabilities for DC/DC converters at our web site at www.datel.com. Small quantities of UNR, 30-66W Series DC/DC converters (or free sample/evaluation units) can be ordered directly from the site using credit cards.
Contacts:
Technical:
John Levrault
Applications Engineer, DC/DC Converters
Tel: (508)339-3000 x221, (800)233-2765 (USA)
Fax: (508)339-6356
E-mail: johnl@datel.com
Internet: www.datel.com
Editorial:
Bob Leonard
Product Marketing Manager
Tel: (508)339-3000 x241, (800)233-2765 (USA)
Fax: (508)339-6356
E-mail: bobl@datel.com
Internet: www.datel.com
Backgrounder
The New Economics of On-Board Power
Often Maligned as Expensive and Unreliable, On-Board DC/DC's Get a Makeover
The latest advancement in distributed power . . . on-board 12V busses dispensing power to numerous non-isolated, step-down, buck regulators . . . is not the consequence of exotic electrical-performance demands. The driving force is simpler and more potent . . . it's money.
Showing little regard for the cost of power as they pursued higher performance, the developers of today's complex IC's have bequeathed us a dozen different "standard" supply voltages (0.8V, 1 V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, etc.) to operate chips guzzling huge amounts of current. Today's system boards often require 6-7 voltages at individual currents ranging from 2 to 60 Amps.
The Days of a "Power Supply per Voltage" Are Over
The cost of such straightforward power delivery is too high. Parallel, isolated, power paths from backplanes onto system boards are redundant and no longer affordable. It is impractical to pay for multiple isolation barriers, multiple sets of "stand-up" capacitors and multiple input filters.
Today's economic solution is true on-board distributed power. The concept is not new, but it is rapidly becoming compellingly affordable as more and more vendors announce related products.
The three basic elements are:
1) A single, high-power, isolated DC/DC converter (the "bus converter") coming from the backplane (typically 48V for telecom/IT equipment) onto the board.
2) An on-board "low-voltage" bus/plane (12V appears to be the most popular, but 5V and 7.5V are being evaluated.).
3) Multiple, non-isolated, step-down converters (which may or may not be located at their point of use) tapping into the 12V plane like artesian wells into an aquifer.
Non-isolated DC/DC Converters Are Less Expensive
They do not require transformers (expensive, inefficient, hot); optocouplers (expensive, unreliable); or isolated drive circuits (expensive, inefficient) controlling power FET's in the secondary timed to events in the primary.
Non-isolated DC/DC's are inherently more reliable, inherently more efficient, and inherently less expensive than their isolated brethren. At similar voltage/current levels, they typically run 4-5% more efficient (very significant when you're in the 90% range), and they typically cost half as much.
Configuring today's power-distribution scheme is uncomplicated. The point-of-load power processors (POLPP's) are designed to be true, low-cost, plug-and-play components. DATEL's LSN D12 Series 10A SIP (single-in-line) DC/DC's are up to 96% efficient, and they require no input/output capacitors to meet their specified noise levels. They require no EMI filtering as both their radiated and conducted emissions are well below FCC Part 15 and EN55022 Class B levels, and they present no exotic load impedances to the bus converters. In high volumes, they sell for less than $10 each.
It's Still the Money
Virtually all architectural "ground swells" that have overcome backplane and on-board power distribution in the past have had multiple, occasionally controversial, justifications including
flexibility, reliability, upgrade-ability, we-could-only-do-it-that-way-ability, etc. And virtually all of them have increased the cost of power. This time, there is only one justification. affordability. And power engineers-delivering savings and not increased costs-will finally be heroes.
