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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

Hello I am a newbie in flyback design and have created a TNY275 converter circuit, as attached. The converter is intended to produce 17V at 0.4A and 12V at 0.5A. The transformer core is E25/13/11, originally without a gap. Two 0.11mm isolators are added under the side ferrite pillars. Primary

I have a couple of devices that I have installed the TOP249YN which work perfectly and have fan cooling on a heat sink which is securely attached to the heat sink with thermal paste. But on some TOP249YN devices, this switches off at 36degC according to my IR reader and

Hi, the fwd pin on the inn3947cq has a limit of 150V which demands high primary to secondary turns ratio in the flyback transformer. Is there a way to circumvent this limit? I am thinking to keep the resistor connecting fwd pin to the transformer secondary very large(~1meg) to create

The design of TL431 here is different from the connection method of other manufacturers. I don’t know how to calculate it to ensure that the feedback can operate normally in the worst case.The difference is like pulling the resistor from AC input to opto, Pin1 (EN/UV) does not write Vdd

Good afternoon, I am using PI Expert online using TNY286PG to design a supply for 12V/1A. On the optocoupler side, I use the TLP385(GB-TPL,E for its small height and since it's suggested in the tool. I would like to know if the optocoupler itself is being taken into account and

Hello, I am working on a PI Expert design with the LCS7265C. For the design I would like the output DC voltage to be 60V, but whenever I enter an output voltage higher than 24V I get the following error "Transformer windings do not fit in the winding window." The

Hello, I am designing a flyback converter with an input voltage of 500VDC to 800VDC and an output voltage of 15V/2A. Among several products, we plan to design using INN3649C that meets the rating conditions. Please provide design references that are identical to my specifications or a design that matches

Hello team, I have referred DER909 reference design for my requirement of a 40W power supply (19V, 2.1A). I am planning to have it as a single layer board due to cost constraints, hence trying to modify the layout slightly. In this regard, is it okay to connect V pin

Hello, guys! Recently, I've been facing issue on dimming LED drivers from Diodes Incorporated. As example, the LED driver I'm in trouble with is: AL8843SP. On datasheet, the manufactur says CTRL pin must be drive with: open drain output or push pull output stage. I build those circuits, but none