Type: Driver
File Name: lm3485_led_34271.zip
File Size: 29.2 MB
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Lm datasheet & applicatoin notes - Datasheet Archive

This simulates very high frequencies and allows the use of small capacitors. I don't know if the LDO is necessary. Unlike, standard linear regulator they aren't lm3485 led famous for stability anyway. My recommendation to further reduce ripple is to use a secondary output filter. You can't use ceramic on the primary cap though, unless as you stated, you use a series resistor, one of those. There is absolutely no reason to think you won't have stable power for your micro.


The micro will probably be the noise maker in fact. Sharp turn on times and high frequencies lm3485 led enable currents to pass all lm3485 led your board and in between traces, so keep that in mind I guess when setting the frequency and picking the FET.

As for the space issue, ma is not a lot, If you really wanted to, you could quite easily fit a ma switching lm3485 led in 1 square inch. Ill post a pic, this is a boost converter for a pressure sensor I designed.

Have you computed your switching frequency correctly? CafeLogic New Member. The answer is in your hot PFET. Since you said lm3485 led used the same circuit, I would assume it's the same.

The hot fet lm3485 led there is a significant voltage drop across the fet, likely activating the current limit. It does, but it also has crap switching characteristics. The output capacitance of the ref fet is 90pf, yours is pf.


What that means is, if your fet and the lm3485 led fet are driven with lm3485 led same output impedance, your fet is going to take at least 3 times longer to turn on and a lot longer to turn off. Your fet spends more time in "limbo" where it isnt quite on or off, its more like a resisitor.

Lm3485 Led Demo Board

The higher the frequency, the more important this is. See all. Item information Condition:. Original price EUR Discounted price EUR Main Products: intergrated circuit,module,connector,Capacitor,Resistor. Tags: Atmega8a-au Supplier Sm In low output voltage appli In the case that the input isforward voltage of the LED array in steady state. Controller LM has cycle by cycle current limit. A simple usb LED lamp circuit using 5 volts power supply from usb port, which can be used to light a desktop or laptop computer during power failure The following lm3485 led combination of resistors, capacitors and inductors depicts an equivalent cir- cuit for a crystal or ceramic Oscillator.

The circuit below illustrates generating a single positive pulse which is delayed relative to the trigger input lm3485 led.

Introduction. Lm3485 led LM LED driver board is a buck regulator derived controlled current source designed to drive high power, high brightness LEDs. The LM is a high-efficiency PFET switching regulator controller that can be used to quickly and easily AN LM LED Demo Board ( MB).

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