Led Driver Switching Frequency
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In most applications using a low voltage dc input led driver is recommended.
Led driver switching frequency. My goal is to be able to power some high power leds 1 amp each at a high frequency 30mhz or more for data communication. The controller also provides fast cycle by cycle current limit input and output ovp plus advanced thermal. As technology advances we will see better led driver applications capable of minimizing power consumption without trading off in terms of efficiency switching frequency component counts etc. Each device incorporates a high voltage power mosfet and discontinuous mode variable frequency variable on time controller.
There are two main types of drivers those that use low voltage dc input power generally 5 36vdc and those that use high voltage ac input power generally 90 277vac. Start date mar 24 2016. Mar 24 2016 1 geeker new member. Led driver switching frequency.
It is designed to it is designed to operate with an input voltage in the range of 90vac to 132vac with a 120 vac nominal input voltage. Led drivers that use high voltage ac power are called off line drivers or ac led drivers. Higher switching frequencies allow the use of smaller passive components. A modern led driver intended for portable applications should be able to switch at frequencies of up to 1 mhz.
One factor is switching frequency. This part of the electronics contains among other things a small transformer for transforming the voltage. Joined dec 27 2015 messages 35 points 0. The switching power supply generates the operating voltage for the led s from the 120v mains voltage.
Pmp6015 this reference design provides a high brightness led driver based on the tps92075. The idea i had was to create a constant current source. Hi all i m trying to build a high power high frequency led driver for an optical communications project. Just wonder if the switching frequency of led the higher the better.
I try to understand the led driver and design my own. Switching at frequencies greater than 1 mhz is not typi cally recommended because it does not significantly reduce. The higher the better. I know than with higher switching frequency.
Furthermore there are some coils or chokes for the intermediate storage of energy as well as for the avoidance of emc. The input voltage range is 2 9v to 22v with output voltage up to 25v.
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