EDN's technical editors highlight notable new products including analog and digital ICs, power components, sensors, passives, boards and systems, software, and more. To submit products for consideration, please see the information on our Editorial Opportunities page.
Profile
RSS Feed
-
Add this blog to your RSS newsreader!
Recent Posts
- Optek Technology OVS5MxBCR4: Miniature, 0.5W LED package measures 3.5 mm2
- Nextreme Thermal Solutions OptoCooler HV14: Thermoelectric cooler meets 3000g shock-testing standard
- National Semiconductor LM3424: LED driver features temperature-management control
- Fujitsu Components America: Self-wetting adhesive sheets targets touchscreen and flat-panel displays
- Avago Technologies ACPL-M71T and ACPL-M72T: CMOS optocouplers target hybrid-electric vehicles
- Parade Technologies DP627 and DP628: DisplayPort timing controls meet DDM specifications at 4M pixels
- International Rectifier IRLB8721PbF: Industrial-grade MOSFET has low gate charge
- Fairchild Semiconductor FDMS7650: 30V MOSFET comes in Power-56 package
- Toshiba America Electronic Components TSON: MOSFET comes in compact, high-current package
- On Semiconductor NSR0xF30NXT5G and NSR0xL30NXT5G: Schottky-barrier diodes suit portable systems
Recent Comments
- tavasoli mofrad on Microchip Technology dsPIC: DSC features 16-bit audio DACs
- radhoo on Allegro A3423: Hall-effect sensor indicates speed and direction of a target
- Polprav on L-com: 240V NEMA-rated enclosures have European-style power plugs
- Wicoedia on NEC Display MultiSync LCD2490WUXi2 and LCD2490W2-BK-SV: 24-in. LCDs use SpectraView color calibration
- Gwoewiel on Texas Instruments TPS51315: 10A synchronous buck converter has integrated FETs
Most Commented On
- Coridium Corp ARMmite: Development and wireless-connectivity board supports Bluetooth and Zigbee protocols (15)
- International Rectifier IRF6716M and IRF6712S: DirectFET MOSFET chip set has a low on-resistance (5)
- Qpixel Technology QL303 and QL305: H.264 codecs support QVGA to HD resolutions (5)
- SunaptiCAD VeriLogger Extreme: Verilog 2001 simulator provides faster RTL and gate-level simulations (5)
- NEC Display MultiSync LCD2490WUXi2 and LCD2490W2-BK-SV: 24-in. LCDs use SpectraView color calibration (4)
Archives
- November 2009
- October 2009
- September 2009
- August 2009
- July 2009
- June 2009
- May 2009
- April 2009
- March 2009
- February 2009
- January 2009
- December 2008
- November 2008
- October 2008
- September 2008
- August 2008
- July 2008
- June 2008
- May 2008
- April 2008
- March 2008
- February 2008
- January 2008
- December 2007
- November 2007
- October 2007
- September 2007
- August 2007
- July 2007
- June 2007
- May 2007
- April 2007
- March 2007
- February 2007
- January 2007
- December 2006
- November 2006
- October 2006
- September 2006
- August 2006
By Category
- Analog (73)
- Analog Design (61)
- Applied System Design (98)
- Communications/Network Design (5)
- Components, Hardware, Interconnect (280)
- Components/New Products (11)
- Consumer Electronics Design (112)
- Digital ICs (48)
- EDA (16)
- Embedded Systems (120)
- IC Design (13)
- Peripherals (95)
- Power Management (143)
- Power Sources/Controllers (166)
- Processor-based Design (38)
- Processors & Tools (59)
- Test & Measurement (32)
- Test and Measurement (43)
Components/New Products Articles
- EDN on Components: MCU gives battery drain a knock-out punch
- Astable multivibrator gets hysteresis from positive-feedback stage
- Class B amplifier has automatic bias
- Cable tester uses LEDs to find faults
- Dual-coil relay driver uses only two MOSFETs
- More...
Blog
Thursday, June 18, 2009
National Semiconductor LM3445: Constant-current controller suits use with triac phase-control wall dimmers
Jun 18 2009 12:00AM | Permalink |Comments (1) |
The LM3445 constant-current controller uses a forward or reverse phase-controller triac to enable offline, uniform, flicker-free dimming of high-brightness LEDs. The device has a 100-to-1 range of dimming capability and maintains a 1A constant current to LEDs. The driver interfaces with resistive loads, such as incandescent or halogen light bulbs. An LED bulb does not appear as a resistive load to the wall dimmer, so dimming an LED bulb using a typical triac dimmer yields suboptimal performance. The LM3445 translates the triac-chopped waveform to a dim signal and decodes the signal for a full range of uniform, flicker-free dimming, preventing 120-Hz flicker and the limited dimming range of many other LED drivers. The LM3445 constant-current controller costs $1.75 (1000).
National Semiconductor, www.national.com
Related entries in: Components, Hardware, Interconnect |
Reader Comments
at 6/26/2009 4:44:07 PM, mido said:
nice
Post a comment
About Us | Contact Us | Free Email Newsletters | Free Magazine Subscription | Advertising | 
RSS
©1997-2009 Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.
Use of this Web site is subject to its Terms of Use | Privacy Policy