Free Newsletter
Register for our Free Newsletters
Newsletter
Zones
Advanced Composites
LeftNav
Aerospace
LeftNav
Amorphous Metal Structures
LeftNav
Analysis and Simulation
LeftNav
Asbestos and Substitutes
LeftNav
Associations, Research Organisations and Universities
LeftNav
Automation Equipment
LeftNav
Automotive
LeftNav
Biomaterials
LeftNav
Building Materials
LeftNav
Bulk Handling and Storage
LeftNav
CFCs and Substitutes
LeftNav
Company
LeftNav
Components
LeftNav
Consultancy
LeftNav
View All
Other Carouselweb publications
Carousel Web
Defense File
New Materials
Pro Health Zone
Pro Manufacturing Zone
Pro Security Zone
Web Lec
Pro Engineering Zone
 
 
 
News

New devices require a minimum of external components

Vishay Electronic : 29 April, 2006  (New Product)
Vishay Intertechnology, Inc. today released two new white LED drivers that deliver high efficiency up to 80% during operation in compact handheld and battery-operated electronics.
The new SiP12401 boost controller and SiP12501 boost converter are optimized to provide efficient, controlled brightness in applications including white LED backlighting for LCD displays in portable electronics such as cell phones and digital cameras.

The SiP12401 boost controller IC uses double-cell NiMH or Alkaline and Li-ion batteries to drive white LEDs connected in series for uniformly bright backlighting without the need for ballast resistors. It supports an input voltage range of 1.8 V to 5.0 V.

Designed to drive white LEDs connected in parallel, the SiP12501 is a boost converter IC for single- or double-cell NiMH or Alkaline battery packs. An internal low-threshold power MOSFET allows the device to start up with a low battery voltage of 0.65 V. The SiP12501 accepts input voltages from 0.65 V to 3.3 V and regulates an output current up to 60 mA from a 0.9-V input. The performance of the converter is enhanced through thermal shutdown protection and anti-ringing control that minimizes EMI.

Both devices feature a voltage-mode PWM design with internal frequency compensation to help reduce overall component count and enable design of smaller, lighter end products. For prolonged battery life, operation in PWM mode with 600-kHz switching yields high typical efficiency of 80% and 75%, respectively, for the SiP12401 and SiP12501. The LED current may be adjusted externally for analog control over intensity. Logic-controlled shutdown is provided with just 1 microamp of standby current.

The two LED drivers announced today are available in a lead (Pb)-free, 6-pin PowerPAK MLP33 package and are rated for operation over the industrial temperature range of 40 C to +85 C.

Samples and production quantities of the new SiP12401 and SiP12501 are available now, with lead times of six to eight weeks for larger orders.
Bookmark and Share
 
Home I Editor's Blog I News by Zone I News by Date I News by Category I Special Reports I Directory I Events I Advertise I Submit Your News I About Us I Guides
 
   © 2012 NewMaterials.com
Netgains Logo