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Cristi 14th January 2010 04:55 AM

Switched Mode Power Supplies (SMPS)
Discussions about Switched Mode Power Supplies from Connexelectronic

chas1 14th January 2010 05:14 PM

I have written in a private email about the design of the smps is aimed at the 220vac market since it has a low voltage 12 volt transformer with 220vac primary only also no means of switch selection for 220/110 vac operation.I am ordering both the smps and the irs2092 amplifier.Are there doc's for these two items?


Cristi 15th January 2010 09:06 AM

i've sent you a reply earlier today.
the small aux. transformer is available both in 220V version and 110V version. the smps works fine at 110V as well. the only thing what need to do when placing an order is to mention about the mains voltage value, and i can choose which transformer to use on that board and to make the jumper for the 110V.

chas1 15th January 2010 09:50 AM

Got email and responded, glad you are a member here and you monitor your threads.I need the 110 version without transformer provided the startup circuit has been tested at low line ; dc after rectifiers of about 250 volts or 100vac input.I like the idea of softswitching but a supply of 1kW or higher with that topology appears difficult at present time.I think forward using controllers with skipcycle for light loads(NCP1217 onsemi) with PFC frontend can result in a nice supply for audio.When I finish I will send docs and you are welcome to build a couple for test.I use paypal for order,how will I indicate supply I want?Also finding current mode difficult for audio I have both current and voltage mode under test with 1kW AB amp at present, fsw 150kHz.

fb 15th January 2010 10:56 AM

Cristi, any news on the new SMPS (for DA-1 or TA0105ARB)?

benchtester 19th January 2010 06:37 AM

Are your SMPS soft start, or should one use the Power Soft Start module with them?

Cristi 19th January 2010 03:22 PM

The SMPS has built-in inrush current limit (softstart) and doesn't need aditional soft start module.
The bigger power smps is under development right now and i estimate that will be available right after Spring Festival. this smps will be able to power most of the available amplifiers including DS-1 and TA0105 amps.

hawui1 20th January 2010 06:44 PM


i estimate that will be available right after Spring Festival
Does this mean end of February.. after the lantern festival?

hawui1 20th January 2010 06:45 PM

Does this mean after 28th feb, the Lantern festival?
Chinese calendar has always been a mistery for me :)

Cristi 25th January 2010 09:50 AM

2 Attachment(s)
i will write the manual for the smps soon. until then, please ask me if you have some questions about.
I will attach the pinout diagram and application example using this smps, TA2022 amplifier board and Speaker protection circuit

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