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Ultra-Bright LED Lamp: (electronic Circuit / Schematic added 10/04) |
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Universal Flasher Circuit: LED flasher with the LM3909 IC (added 2/06) |
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Universal Pots Interface Lightning Protection: Melexis Application Note (app note added 2/06) |
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Using the TPS61040 in High Voltage Applications: TI Application Note (added 2/06) |
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Using the Xitanium Driver : Luxeon Application Note (app note
added 2/06) |
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Voltage to Current Converter Drives White LEDs: 06/27/02 EDN Design Ideas / (added 1/05) You sometimes
need to drive a white LED from one 1.5V battery. Unfortunately, the forward voltage of a white LED is 3 to 4V. So, you would need a dc/dc converter to drive the LED from one battery. Using the
simple circuit in Figure 1, you can drive one white LED or two series-connected green LEDs, using only a few components.... |
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White LED Circuits: (electronic circuit added 4/05) |
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White LED Driver Backlights LCD and Keypad: 11/13/03 EDN Design Ideas / (added 1/05) Designers widely use
white LEDs to backlight color LCDs and keypads in handheld devices, such as cell phones, MP3 players, GPS navigators, and PDAs. Their spectrum and brightness represent near-ideal light
sources. One possible configuration for a phone or a phone/PDA combination is to have a group of three LEDs to light the display and six LEDs for the |
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White LED Driver in Tiny SC70 Package Achieves 84% Efficiency: Linear Technology Magazine Design Ideas
August 2002 (app note added 02/05) |
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White LED Driver in Tiny SC70 Package Delivers High Efficiency and Uniform LED Brightness: DN315 Design Notes (Linear
Technology) (app note added 1/06) |
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White LED Driver Minimizes Space Maximizes Efficiency and Flexibility: Linear Technology Magazine Design
Feature December 2003 (app note added 02/05) |
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White LED Driver Provides 64 Step Logarithmic Dimming: 06/24/04 EDN Design Ideas Online (added 1/05) The circuit in this
Design Idea is designed for portable-power applications that require white LEDs with adjustable, logarithmic dimming levels. The circuit drives as many as four white LEDs from a 3.3V source. |
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White LED Driver Touts High Efficiency: 06/12/03 EDN-Design Ideas / (added 7/03) White LEDs, the most recent addition to
the LCD backlight, find common use in providing backlight for color LCDs. Thanks to their size and white-light output, they appear in small, portable devices with color displays, such as PDAs
and cellular phones. Like other LEDs, a white LED needs a constant-current source—typically,.... |
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White LED Head Lamp: A white LED head lamp which can operate with only two AA batteries. The LEDs are driven in constant
current, so that the brightness is maintained until end of battery life. (added 10/05) |
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White LED Power Supply Design Techniques: TI Application Note (added 2/06) |
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White LED Step-Up Converter in SC70 and ThinSOT: Linear Technology LT1937 (app note added 02/05) |
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White Light LED Driver with Gradual Dimming: TI Application Note (added 2/06) |
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White-LED Driver Backlights LCD and Keypad: 11/13/03 EDN Design Ideas (added 1/05) Designers widely use white LEDs to
backlight color LCDs and keypads in handheld devices, such as cell phones, MP3 players, GPS navigators, and PDAs. Their spectrum and brightness represent near-ideal light sources. One possible
configuration for a phone or a phone/PDA combination is to have a group of three LEDs to light the display and six LEDs for the |
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White-LED Driver Provides 64-Step Logarithmic Dimming: 06/24/04 EDN Design Ideas Online (added 1/05) The circuit in this
Design Idea is designed for portable-power applications that require white LEDs with adjustable, logarithmic dimming levels. The circuit drives as many as four white LEDs from a 3.3V source. |
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White-LED Driver Touts High Efficiency: 06/12/03 EDN Design Ideas (added 1/05) White LEDs, the most recent addition
to the LCD backlight, find common use in providing backlight for color LCDs. Thanks to their size and white-light output, they appear in small, portable devices with color displays, such as
PDAs and cellular phones. Like other LEDs, a white LED needs a constant-current source—typically, on the order of 15 to 20 mA.... |
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Wide Input Range 1a LED Driver Powers High Brightness LEDs with Automotive and 12 VAC Supplies: DN1012 Design Notes
(Linear Technology) (app note added 1/06) |
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ZXSC100 Single cell DC-DC converter LED driving applications: Zetec Semiconductors Applications Notes ZXSC100 single
cell DC-DC converter offers an ideal solution to driving white LEDs in flashlights, enabling operation from a single NiCd or NiMH cell. (app note added 6/06) |