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From: Jan Panteltje <alien@comet.invalid>
Newsgroups: sci.electronics.design
Subject: Re: 9W LED inrush current
Date: Wed, 02 Oct 2024 15:59:19 GMT
Message-ID: <vdjqkn$11t8a$1@solani.org>
References: <mN5LO.101241$CStb.23546@fx12.ams1> <vdj532$1m9e0$1@solani.org> <vdjcpr$37dnn$1@dont-email.me>
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On a sunny day (Wed, 2 Oct 2024 17:33:07 +0530) it happened Pimpom
<Pimpom@invalid.invalid> wrote in <vdjcpr$37dnn$1@dont-email.me>:

>On 02-10-2024 03:21 pm, Jan Panteltje wrote:
>> On a sunny day (Wed, 2 Oct 2024 12:01:47 +0530) it happened Pimpom
>> <Pimpom@invalid.invalid> wrote in <mN5LO.101241$CStb.23546@fx12.ams1>:
>> 
>>> Does anyone have a figure for the switch-on inrush current of a typical
>>> 9W LED bulb? Preferably for 230/240V.
>> 
>> Not sure wat the 'typical' circuit is, this is wha tI found in my LED bulbs from Cina:
>>   https://panteltje.nl/pub/LED_light_circuit_diagram_IMG_6925.JPG
>>    peak current is limited by the 1uF series cap at 50 Hz here.
>> There are so many different LEDs around,...
>> 
>Ah, I should have formed my question more carefully. I know about those 
>early bulbs. They were the precursors to modern ones that use switching 
>supplies. These later models are the ones I mean.

Google
 https://www.google.com/search?q=LED+lamp+driver+IC
lots of chips and circuits
 click on 'pictures' top screen