LED driver PT4115: how to avoid arc around IC pins?
2017年4月29日 · I built a LED driver with PT4115 IC. The board lighted LEDs up but sparks appeared around SW, VIN & GND pins after 10 seconds and the phenomenon didn't damage the IC. I recorded it by my mobile phone. Spark around pins. Below is the schematic and the PCB board: I removed R2, D2 and R3 so the DIM pin is floating.
LED-driver board with WS2818/WS2811 and PT4115
The DIM pin of the PT4115 seems to be rather sensitive to over-voltage and ESD, so it is protected by an additional resistor and Z-diode. The three current sense resistors have certain values, so that if you connect them in parallel with the solder jumpers, the specified currents are selected. these currents are 330mA, 500mA, 700mA and 870mA.
Designing/chosing components for PT4115 led driver
2018年2月14日 · I've settled on the PT4115 driver, because I can find them dirt cheap on aliexpress. The circuit I'm using is the reference design in the datasheet, but I just want to make sure that I'm chosing the correct parts.
PT4115 LED driver - Electrical Engineering Stack Exchange
2016年11月21日 · Excuse me if my question is too specific. I'm trying to get an LED driver using PT4115 work. I've spent hours but no success. I've created exactly the circuit depicted in the datasheet. I have used 0.33ohm resistor (0.300mA), 95uH inductor, 100uF capacitor and 1N5819 diode. I've checked all parts a hundred times.
PT4115 PWM dimming flickering - Electrical Engineering Stack …
2024年11月2日 · The PT4115 uses the DIM pin in 2 ways: PWM with a logic high >2.5V and low <0.3V performs the duty cycle based dimming DC voltage between 0.5V and 2.5V sets a constant current and there is an internal 200k resistor to 5V
PT4115 Led diver | Page 2 | All About Circuits
2014年2月1日 · PT4115 Led diver Home. Forums. Hardware Design. General Electronics Chat . PT4115 Led diver. Thread ...
Pt4115 LED DRİVER - All About Circuits
2019年12月19日 · I want to provide DİM with LM555 for Pt4115.I built the curciut.Firstly I tried part LM555, it worked smoothly but when the circuit pt4115, leds started burning constant and started to pull 5 volts of the circuit What's poblem
ripple current - PT4115, where should I put output capacitor ...
2019年12月31日 · The PT4115E datasheet states: Peak to peak ripple current in the LED(s) can be reduced below 30% of the average current, if required, by adding a capacitor across the LED(s).
PT4115 Led diver - All About Circuits
2014年2月1日 · PT4115 Led diver Home. Forums. Hardware Design. General Electronics Chat . PT4115 Led diver. Thread ...
PT4115 LED driver - All About Circuits
2019年7月4日 · I bought a pt4115 led driver module from ebay to drive 3x 1w (300mA-350mA) led chips. I would like to reduce the current to a lower value so that the LED...