Product category:
Power Supply ICs and Controllers
News Release from: National Semiconductor | Subject: LM2590HV, LM2591HV, LM2592HV and LM2593HV
Edited by the Electronicstalk Editorial
Team on 29 May 2001
Convertor family expands to higher
voltages
National Semiconductor has added four high-voltage step-down voltage convertors to its high-efficiency Simple Switcher line.
National Semiconductor has added four high-voltage step-down voltage convertors to its high-efficiency Simple Switcher line Tolerating inputs of up to 60V, these new devices are ideal for applications such as auto-PC, communications infrastructure and a host of industrial applications
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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National's high-voltage family now makes it easy for designers of automotive appliances to meet the new 42V standard.
The high-voltage family shares the advantages of excellent line and load regulation, high-efficiency and ease-of-use.
Two of the new high-voltage devices, the LM2590HV and LM2591HV, drive 1A loads and the second pair, LM2592HV and LM2593HV, drive 2A loads.
The four new parts join National's previously announced LM2594HV and LM2597HV, which drive 0.5A loads.
"A growing need exists for high-voltage, easy-to-use integrated switchers as an alternative to expensive power supply modules", said Monika Abele, Product Marketing Engineer for Power Management Europe.
"This new HV series extends the proven Simple Switcher concept to new designs, opening an entire new range of applications".
The devices' high switching frequency (150kHz), integrated switch and only four external components enable power supply designs in minimum PCB area.
Output voltage options are 3.3 and 5V, and adjustable from 1.2 to 57V.
The LM2590 and LM2593 offer special features, including power-on reset with programmable delay, and a soft-start capability that prevents excessive in-rush current.
All four offer safety features such as a two-stage frequency reducing current limit and over-temperature shutdown.
A power saving shutdown mode reduces standby current to just 90uA.
An essential feature of National's Simple Switcher line is National's Windows-compatible Switchers-Made-Simple design software.
The software provides a guaranteed solution including schematics, system performance summaries, component lists and vendor information.
Dynamic modelling can also be done on National's new WebBench site featuring WebSim, a powerful software tool that allows designers to modify and probe their circuit for dynamic performance characteristics like transient response.
These new HV devices offer the same ease of use that has made Simple Switchers the most widely accepted DC/DC convertors available.
Evaluation kits are available on the National Semiconductor power website at www.power.national.com.
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