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I was referring to DER-712 and have questions regarding its operation I saw the switching wfms given in the document, what determines the voltage distribution between Q3 and innoswitch MOSFET? the document says "the voltage across the internal MOSFET of INN3679C IC however will be limited by the TVSClamp VR2"

I am designing a 20W LED driver based on lyt1604 and following AN-67. I constructed the AC-DC and DC-DC side separately on a DOT board. I did this for both hide side and low side topologies. DC - Dc side was tested with 60V Dc power supply and worked well

Hello, I am designing circuit usink LNK 305. I follow manual and i am wondering why are two diodes used for half wave rectifier. Can i use only one top diode for rectifier or i need second one on bottom? I need MCU on mains potential referenced to neutral

Hi I am trying to design a buck converter which operates from 60V to 550V with output of 5V and 200mA load current.I have few questions while referring the availabe documentation with the LNK3206GQ: Some documents site to a minimum input voltage of 30V , is it possible to reduce

Hi, I'm trying to design a laboratory power supply that can generate an output voltage between 0 and 30VDC and max 5A. Which AC/DC converter could you recommend for this application? Keep in mind that I will only use the AC/DC converter to generate the output voltage of the power

hello? I am using TNY278PN, but TOPIC is damaged in the device. Can I find out what causes burnout? We will upload the circuit diagram. Please give your opinion on which part is the problem. INPUT : AC220V Output : DC12V 0.1A, DC24V 0.4A Thank you!

Hello, I'm interested whether it is common for the 2SC0435T driver to fail (blow up) if a short circuit occurs between the IGBT gate and collector. This short circuit is a result of the blown IGBT. I am questioning because we were previously using the IHD660NC1(obsolete) and it survived under

Hi All , I am Using LNK3206D-TL in my design with 5V Output.Please review the design and suggest any improvements related to EMI/EMC Standards . PFA image in the below file. Kindly do the needful

i am using INN3670 for 24/3.2A, 85W pl suggest how to achieve Soft Finish during Start up, earlier we use to connect a Elec Cap of 47uF -100uF across opto coupler Anode & Cathode. regards M.Sreenivasan

I am using DPA423 for multiple outputs. Everything is within range but I'm getting 2 warnings Ref. #145 Estimated clamp voltage is too high. Ref. #184 Clamp current cannot be calculated. This may result in incorrect selection of clamp component values. Even after selecting bigger device as suggested by PI

Hello, Greetings, I want to run simulation on INNOswitch flyback in TINA TI for loss analysis and efficiency improvement. Kindly share me spice model for part of INN3678C or let me know where can I find. Thanks and Regards, Utham

The TOP245YN chip has no starting pulses. Voltage relative to pin S. D - 315V X - 1.7 V C - 0.7 V F - 0 V V-2.8 If 5.8 V is forcibly applied from the laboratory power supply unit And pulses appear on the pin S. What are the

I designed a LinkSwitch-HP power supply for 24V 0.6A output using Pi Expert. The resulting supply seems to work somewhat, but has the following problems: The supply is supposed to be able to output 0.6A, but it consistently will shut down at 0.27A of load. (Please see attached pictures to

Hi, I'm looking for an isolated 10W peak offline flyback for a small analog amplifier and for me it looks like you recommend TOPSwitch for audio applications. Is this still valid? What's the reason for that? I'm using InnoSwitches in another applications and I'm wondering what's the reason the TOPSwitch

Hi, I'm using INN3165C for my wide-input range flyback. My secondary looks very similar to that of DER-717 (attached image) 1. At a fixed input voltage and load, I observed the switching frequency changes in a +-2kHz band. (attached image). Is this some feature of the innoswitch controller? From my

I have an old Power Integrations Databook from 1993 with Design Aid DA-4, "EMI Filter Design for tthe PWR-SMP Fmaily" In it there is a section about "Power Cord Resonance" which echos my experience with conducted EMI conundrums. However, that book is the only source I have for this and

Hello, i need to develop a SMPS circuit using LNK624 IC. The input supply is 3-phase 440VAC. I need 12V, 0.5Amp output from this supply. Will it work and is there any reference circuit for this?

Dear Sir/Madam, I have followed this reference manual. https://www.power.com/sites/default/files/documents/der-628_18watt_usb_pd_charger_using_innoswitch3-cp_and_cypress_controller.pdf I couldn't get any higher output power than 5V and 500mA from the USB socket by plugging different cell phones. My question is, since the reference design date is 2018, did you use the original CYPD3175 with pre-loaded firmware? If not

Hi! Regarding to the InnoSwitch4, HSD to ZVS Delay programming, it is explained on P5 of the InnoSwitch4-CZ datasheet. tLLDL and tHLDL are switched by the input line voltage. I consider that tLLDL is optimal for CCM and tHLDL is optimized for DCM. Then, I consider that DCM occurs at

I have a question about InnoSwitch3. Does the SR circuit on the secondary side perform SR operation even with light load or no load? Other companies' SR control ICs does not perform SR operation at light loads, but perform rectification using a body diode of SR-MOSFET. This is because when