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UV Detection Question

Forums: AC-DC Conversion Forum

Hello all. My circuit is an 18VDC/-15VDC supply using a TOP255YN IC. I have set my UV shutdown circuit with a 5 MEG resistor to the "V" pin of the IC. It seems to work as designed - doesn't turn on until DC rail is around 135VDC (around 95 VAC

problem with AC-DC conversion using LNK6666E

Forums: AC-DC Conversion Forum

hi, we design SMPS using following specifications. Application: Industrial Instrumentation,automation,pharma machinery Input Type: Universal Output Voltage: 15 VDC Output Current: 2A Output Power: 30 W part used: lnk6666e also following are some list of problem, 1. not getting output 2. out put fluctuates. 3. when smps not powered up, using

Any way to stop Linkswitch-CV switching AC when press button, is it possible to do that without damage the IC?

Forums: AC-DC Conversion Forum

Is it possible to add a momentary push button and some components so that when press, the linkswitch IC will stop switching and output DC will be zero Volt? When button release, it will be back to normal operation. I plan to use LNK623DG with the design less than 5watt

Standards and test certifications

Forums: AC-DC Conversion Forum

INN3270C inno switch, what are the test certification having and is it compatible with MIL standards

High-Voltage Constant Current LED driver w/ DC input

Forums: LED Drivers Forum

I'm trying to design a LED driver, but after analysing PI controllers couldn't find an adequate solution. The specs are: Vin = 70V to 140Vdc Vout = around 130V (depends on LED string) Iout = 250mA Any help would be a blessing. Thanks for yr patience. JEO

Incorrect operation of constant power in InnoSwitch3-CP H202

Forums: AC-DC Conversion Forum

Good afternoon! In my device, the constant power function does not work correctly. After the output current is compared with the calculated current (pin IS), the voltage drops and the current drops. What can this be related to?

INN3679C_No Load input power measurement

Forums: AC-DC Conversion Forum

Hi all, how can I measure the no load input power at different input values? I have no stable reading for this. please find attached the drai-source signal @ no load. in your design report for DER-747 you put these values (p. 32). BR, Imad

Please recommend AC/DC conversion solution with non-isolated output

Forums: AC-DC Conversion Forum

Hi, Currently I try linkswitch 3206 with 24V non-isolated output, it works fine with 5~6W output, can you recommend higher output over 20W non-isolated solution? over 40V non-isolated output is fine. can TOPSWITCH series re-config as non-isolated toplogy? Thanks!!

wide range smps 100vac to 500vac

Forums: AC-DC Conversion Forum

i want to design wide range smps using TNY series. input : 100vac to 500vac output : 1. 12v 0.6 A 2. 5v 2A

Does the switch valley current refer to the output current?

Forums: AC-DC Conversion Forum

5V/4A boost converter, the switch valley current is 4A, does it mean the output current?