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Category: Light Laser LED Circuits / Led circuits Views: 2410 Rank: 0 The LT®3465/LT3465A are step-up DC/DC converters designed to drive up to six LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. These devices integrate the Schottky diode required externally on competing devices. Additional features include output voltage limiting when LEDs are disconnected, onepin shutdown and dimming control. The LT3465 has internal soft-start. The LT3465 switches at 1.2MHz, allowing the use of tiny external components. The faster LT3465A switches at 2.4MHz. Constant frequency switching results in low input noise and a small output capacitor. Just 0.22µF is required for 3-, 4- or 5-LED applications. The LT3465 and LT3465A are available in low profile (1mm) 6-lead SOT-23 (ThinSOT¾) packages. visit page.
Related circuits This is a very basic circuit for flashing one or more LEDS and also to alternately flash one or more LEDs. It uses a 555 timer setup as an astable multivibrator with a variable frequency. With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by... For those who don’t like microcontroller projects, pretend the micro is a dedicated LED driver IC that just happens to have been designed to control 30 LEDs in the shape of a Heart (what a stroke of luck!). And it won’t be declared obsolete just after publication like a purpose designed IC... The LED with integrated flasher is connected in series with the base-emitter junction of transistor Tl. Thus, the l Bicycle weel Light Display with ATTiny26 48 LEDs total, 24 on each side of the board. This gives higher resolution patterns, and they can be seen from both sides of the bike. The LEDs are controlled from a series of 74x373 ICs connected to an 8 bit bus on the microcontroller. As opposed to shift registers, all 48 LEDs can be updated in... For those who dont like microcontroller projects, pretend the micro is a dedicated LED driver IC that just happens to have been designed to control 30 LEDs in the shape of a Heart (what a stroke of luck!). And it wont be declared obsolete just after publication like a purpose designed IC might... The super LED flasher is actually two complete LED flasher circuits on one circuit board. The first, LED flasher is made up of 1C1 and LEDs D1 and D2. IC1 is a 555 timer IC configured as an astable (free-running) multivibrator with its output on pin 3. The frequency of the 555`s oscillation is... Add switch-and-LED I/O to DSP`s serial port You can attach 16 switches and 16 LEDs to the data bus using octal latches and decoded address strobes. However, this connection can be a wiring nightmare--or even impossible if the design does not generate the required control strobes. Most DSP chips have a synchronous serial port that provides... The white-LED flasher in Figure 1 offers an alternative approach to a previously published idea (Reference 1). Targeting use in portable appliances and products powered by a single cell, this circuit flashes an LED to provide a highly visible warning signalfor example, to indicate power on,...
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The MAX8831 integrates a 60mA, 28V PWM DC-DC step-up converter with five low-dropout LED current regulators for display and keypad backlighting in cell phones, PDAs, and other portable devices. The IC provides up to ...
SD101A-TR Vishay Semiconductor Diodes Division DIODE SCHOTTKY SS 60V 30MA DO35 ... RT8567GQW Richtek USA Inc IC LED DVR 6CH HV 20WQFN .... RT9278GQV Richtek USA Inc IC CONV STEP-UP SYNC 10VDFN ...
The simplest solution is likely a MC34063 with an inductor (about 20 uH) and a timing capacitor (about 470 pF) and a Schottky diode (capable of a few amps) and a buffer capacitor (typically 470 uF) as well as a resistor divider ... Now, if there is some special reason why you absolutely can't use...
Step 5: Testing and Finishing. Connect input power source and slowly increase the voltage (with unloaded output). The IC should start-up and LED should be lit at about 1V. If it has... DSC_4433.jpg. Introduction: A voltage step-up is a .... a very light load. this is SMPS step up circuit and diod...
zz: http://www.maxim-ic.com/app-notes/index.mvp/id/3243. White-LED Boost Converter vs. Charge PumpAbstract: Powering white-LEDs in today's handheld electronics requires specialized regulators. Two common styles of ...
Help Finalizing LED Boost converter The Projects Forum. ... 2) I've listed the Schottky diode as needing to be greater than 500mA and 10V - this is because I have not started looking for a suitable component yet. 3) I need help ...
Boost voltage converter ranging from 1.5 to 15 ...
Diode Tutorial & How to build an AC to DC power supply
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