Product category:
DC/DC Convertors
News Release from: Datel (UK) | Subject: LSN D3 series SIPs
Edited by the Electronicstalk Editorial
Team on 21 June 2002
Nonisolated convertors are economical
onboard
Datel's new LSN D3 series SIPs are nonisolated DC/DC convertors that accept 3.3V inputs (3.0 to 3.6V input range) and deliver 1, 1.2, 1.5, 1.8, 2 or 2.5V outputs rated at 10A.
Datel's new LSN D3 series SIPs are nonisolated DC/DC convertors that accept 3.3V inputs (3.0 to 3.6V input range) and deliver 1, 1.2, 1.5, 1.8, 2 or 2.5V outputs rated at 10A Employing standard single-in-line (SIP) packages (51 x14 x 8.6mm), LSN D3 SIPs can be configured in either vertical or horizontal orientations
This article was originally published on Electronicstalk on 10 May 2001 at 8.00am (UK)
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The former occupies a mere 450mm2 of board space.
The latter has a mere 8.6mm height.
LSN D3 SIP's facilitate true point-of-use (point-of-load) power processing.
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They take readily available, onboard 3.3V power and convert it, at the lowest cost, with the highest efficiency, in the smallest area, to virtually any lower voltage required by the ever-evolving core logic of today's current hungry DSPs, ASICs and CPLDs.
Simple economics dictate that the mind boggling proliferation of supply voltages required by today's new ICs can not be matched by a similar proliferation of isolated DC/DC voltage convertors.
It simply cost too much.
Once onboard power (typically 3.3V) has been isolated from its backplane bus (typically 24/48V for IT equipment), additional isolation is unnecessary.
If a designer requires onboard 1-2.5V power, it is considerably less expensive to generate that power from the 3.3V source, using nonisolated techniques, rather than employ additional isolated DC/DCs to generate it from the backplane bus.
Because of high currents being switched at high frequencies, most commercially available, nonisolated DC/DCs require the installation of expensive input capacitors (with high RMS-ripple-current ratings) and output capacitors (with very low ESR specifications and high frequency response) to suppress input/output ripple/noise to acceptable levels.
Amazingly, LSN D3 SIPs have onboard input capacitors fully rated to handle the units, input ripple current and onboard output capacitors fully capable of reducing output noise to typically 10mV peak-peak (35mV peak-peak maximum).
The LSN's best-in-class power density is achieved with a fully synchronous, fixed-frequency (300kHz), buck topology that delivers: high efficiency (95.5% for 2.5V output models at 50% load), tight line/load regulation (+0.1%/+0.25% maximum), quick step response (100ms), stable no-load operation (for circuits going into "sleep" mode), and no output reverse conduction.
The fully functional LSN D3's feature output overcurrent detection, continuous short circuit protection, a +10% output-voltage trim function, a remote on/off control pin, and an output sense pin.
High efficiency enables LSN SIPs to deliver more output current at temperature than virtually all competing SIPs.
All LSNs deliver full power to at least +65C with no supplemental air flow.
With minimal air flow (100 litre/min), all models operate at full power to at least +75C.
Small quantities of LSN D3 series SIP DC/DC convertors (or free sample/evaluation units) can be ordered directly from the Datel website using credit cards.
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