Product category:
DC/DC Convertors
News Release from: Datel (UK) | Subject: UHE Series
Edited by the Electronicstalk Editorial
Team on 17 January 2002
12-30W DC/DC convertors shrink to
plastic packs
Datel's new UHE Series of 12-30W (2-10A), single-output, isolated DC/DC convertors are aimed at applications previously the exclusive domain of "bricks".
Datel's new UHE Series of 12-30W (2-10A), single-output, isolated DC/DC convertors are aimed at applications previously the exclusive domain of "bricks" Housed in traditional, low-cost, plastic packages (41 x 51 x 10mm), UHEs are significantly smaller than half bricks, and the UHE's high efficiency obviates the need for the heatsinking aluminium baseplates common to most bricks
This article was originally published on Electronicstalk on 10 May 2001 at 8.00am (UK)
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The 30W/10A UHE's package (21cm2) is also smaller than the 5.1 x 5.1cm package traditionally associated with currents in the 4-5A range and power in the 20-25W range.
Nevertheless, UHE's carry the standard 5.1 x 5.1cm pinout.
By combining a high frequency (330kHz) fully-synchronous forward topology, a new generation of low-on-resistance power mosfets, and proven-reliability, fully automated, SMT-on-PCB construction, UHE DC/DCs achieve outstanding electrical and cost efficiencies.
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Models are up to 84% efficient while delivering a full 10A (1.2-2.5V output models) and up to 92% efficient when delivering a full 25-30W (3.3-15V output models).
High efficiency (less heat dissipation) makes possible the smaller package whose aspect ratio permits the standard pinout.
It also enables many UHE models to deliver full power from -40 to +60C (ambient) without heatsinks or supplemental air flow.
Synchronous rectification enables stable no-load operation, and the UHEs have eliminated one of the topology's few shortcomings - output reverse conduction.
UHE DC/DCs will not conduct current (nor self-destruct) if a voltage is inadvertently applied to the output of an "off" device.
Output voltages are 1.2, 1.5, 1.8, 2.5, 3.3, 5, 12 or 15V.
Input voltage ranges are 10-18V (D12 models), 10-36V (Q12 models), 18-36V (D24 models), 18-75V (Q48 models) or 36-75V (D48 models).
All models are fully isolated (1500V DC), line/load regulated (+0.2% max and +0.5% max, respectively), and fully I/O protected.
All feature input pi filters, input under voltage and overvoltage lockout, input reverse-polarity protection, output overvoltage protection (a rarity on such low-output-voltage devices), output current limiting, continuous short-circuit protection, and thermal shutdown.
Each model in the UHE, 12-30W series has an output voltage trim pin and an on/off control function (with optional positive or negative polarity).
Additionally, the high-current/low-voltage models (1.2-5V at 5-10A) can be ordered with output sense pins.
In all, there are 80 models in the series.
UHE's are packaged in low-cost, light-weight, diallyl phthalate (UL94V0 rated) plastic packages with standoffs.
EMC compliance is achieved via a low-noise design rather than with expensive metal shielding.
All models are certified to IEC950, UL96050 and EN60950 safety requirements for basic insulation.
Small quantities of BWR-5/3.3, 30W DC/DC convertors (or free sample/evaluation units) can be ordered at the Datel website using credit cards.
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