Product category:
DC/DC Convertors
News Release from: Datel (UK) | Subject: LEN series
Edited by the Electronicstalk Editorial
Team on 18 August 2003
High-current POL convertors support IBA
Nonisolated, point-of-load convertors boast 85-96% efficiencies at competitive prices to help the intermediate bus architecture (IBA) gain respect.
The new intermediate bus architecture (IBA) clearly brings cost savings and performance improvements to multivoltage, high-current, onboard power systems An effective IBA implementation, however, requires using new bus convertors and POLs (point-of-load convertors) that probably have been on the market for less than a year
This article was originally published on Electronicstalk on 10 May 2001 at 8.00am (UK)
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Many designers are reluctant to do that.
Therefore, the proliferation and widespread acceptance of the IBA have been slowed by the lack of affordable, multisourced, building blocks, and many power supply manufacturers are reluctant to develop products for which there are not yet clear standards or clear market opportunities.
This is not the case for Datel.
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Datel's DTL22A is the first in a series of easy-to-use voltage-controlled electronic loads.
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Packaged on a diminutive 101.6 x 158.75mm board, Datel's new CPCI-510P includes a number of high-performance features for analogue signal processing applications on the Compact PCI bus.
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Datel's model PCI-462 delivers a full 22W output, a precision programmable power D/A output and A/D input monitor, configured on a desktop PCI board.
The company is committed to the success of the IBA.
It is surging forward with new product development - and the establishment of industry standards - in support of it.
Datel's new LEN series are the first high-current POL bricks and show the company's commitment to IBA.
The new POL bricks are nonisolated DC/DC convertors that accept a 12V +/-15% input and convert it to any lower voltage from 0.8 to 3.3V (at 28A) or 5V (at 25A).
Using a two-phase, fixed-frequency, buck-regulator design, the LEN series simultaneously delivers high efficiency (from 85% for 0.8V output to 96% for 5V output), low-noise (20-30mV peak-peak), quick step response (100us), and a wide operating temperature range.
The LEN series uses the well established eighth-brick (E-brick) form factor (58 x 23 x 11.7mm) and the newly established, nonisolated, eighth-brick pinout.
The soon to be multisourced pinout doubles the number of output and return pins.
This interdigitated approach effectively halves losses due to pin resistance and inductance and facilitates output filtering.
The new E-brick package is offered in both standard through-hole and new SMT versions.
Surface-mount ("M") models of the LEN series employ a high-temperature, plastic leadframe to maintain coplanarity and also to support the unit's heat shield.
The heat shield establishes 50C differential between the ULQ's SMT components and the hot circulating air of a reflow oven.
"M" models can be attached to a user's board with lead-free solder without altering reflow temperature profiles.
LEN series DC/DC convertors fall under the Datel lead-free initiative.
This programme eliminates all lead from the company's PCBs and from its assembly and pinning processes.
LEN series PCBs are finished with electroless nickel/immersion gold (ENIG).
The package pins for both through-hole and SMT models are tin-plated copper.
All units are assembled in Datel's facility using high-temperature lead-free alloys.
LEN devices offer the full complement of I/O protection including input overvoltage shutdown and undervoltage lockout.
Output-side protection includes current limiting, short-circuit protection, overvoltage protection (a rarity on nonisolated units), as well as thermal shutdown.
Additionally, each model has an output-voltage-trim pin, an on/off control function, and an output sense pin.
In small quantities, LEN series nonisolated DC/DCs are priced at US $45 each (comparable 30A isolated eighth bricks are priced in the $60s).
In OEM quantities (10,000-off), LEN devices are priced at $29 each.
Free sample/evaluation units (for qualified OEMs) and/or preproduction quantities (of less than 25 pieces) are immediately available from stock.
Production quantities require 6-8 weeks lead time.
Small quantities of LEN series DC/DC convertors (or free sample/evaluation units) can be ordered directly from the Datel website using credit cards.
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