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Yunsheng Qu
2 months ago
Power management
Power management forum
RE: UCC25640EVM-020: Over load protection
Hi, Ala 1. BMTL is defined by LLSS resistor divider, i suggest you use pull high resistor ad 470kohm and pull low resistor as 200kohm. and short BW pin to GND. 2. other element affect burst mode threshold is VCR pin capacitor divider, you should decrease...
Darren (FAE)
5 months ago
Power management
Power management forum
UCC25640EVM-020: Functionality Questions
Resolved
Part Number: UCC25640EVM - 020 On the EVM, when HV pin is tied to PGND and VCC supplied
Darren (FAE)
7 months ago
Power management
Power management forum
UCC256404: Questions about Usage in LLC Application
TI Thinks Resolved
Part Number: UCC256404 I have a customer working on an LLC (LCC-type for wide Vin) resonant design, and considering the UCC256404. But he has some questions, and your help would be hugely appreciated. The UCC256404 will be used for a DC input voltage...
Hong Huang
11 months ago
Power management
Power management forum
RE: UCC256402: UCC256402
The board part number is
UCC25640EVM-020
Eric Faraci
9 months ago
Power management
Power management forum
RE: UCC256302: Incorrect duty cycle in gate signal
Ehsan I'm not sure which "feedback resistor" you are referring to. Is it the same as R19, R23 in
UCC25640EVM-020
? If this resistor divider network is different than what you expect, the LLC converter can be operating at a point that...
Mike O'
over 1 year ago
Power management
Power management forum
RE: UCC256404: UCC256404 Won't start up
Hello, I reviewed the excel tool and the calculated Np/Ns was 8.125 and your design had chosen 9. To get the proper output voltage you would generally round down to the lowest whole turn. I would consider making this 8. I reviewed your schematic...
Eric Faraci
8 months ago
Power management
Power management forum
RE: UCC256304: Bias winding and auxiliary bias
Paolo First I'd like to make sure that it's clear on the differences between UCC25630x and UCC25640x. UCC25640x is a generational, pin-to-pin compatible improvement over UCC25630x. Details of improvements are in the following app note https...
Desheng, Guo
8 months ago
Simulation, hardware & system design tools
Simulation, hardware & system design tools forum
RE: TIDA-010038 Any evaluation board to loan?
Hi, Poh Thanks for interesting in this reference design from SEM team, but this board TIDA-010038 is out of stock now. But, the two TI EVM boards (PFC and LLC) could be applied, you can combine these two together instead. https://www.ti.com/tool...
Kim nordtorp Madsen
7 months ago
Power management
Power management forum
RE: UCC256402: Loop gain equations for the UCC256402
Hi Hong Huang the datasheet claims: "Hybrid hysteretic control (HHC) – Best-in-class transient response" - but there is no detailed design how to get to the "best in class transient responce" lets take the eval board UCC25640EVM...
Peter Baxter
over 1 year ago
Power management
Power management forum
UCC25600: UCC256404 Resonant Capacitor Cr - Capacitive Divider?
Resolved
data sheet). The UCC25640EVM - 020 Evaluation Module contains full schematics which do show the upper
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