Hiroshi-san
You are correct, in order to achieve small solution size and have high efficiency an active clamp flyback will have to be used instead of a QR flyback.
The size of the adapter is dependent on the switching frequency. To achieve small solution…
Rajkumar,
Thanks for your interest in TI here.
Ucc28740 is a good fit for these applications. We do have a 20v,3A reference design pmp11451 here: www.ti.com/.../PMP11451
For the 100w application you may consider using ucc28051 and ucc28740 together…
Other Parts Discussed in Thread: PMP11451 , PMP11455 , TPS25740A Hi Sir,
Currently we design Type-C PD Adapter and reference PMP11451,
Modify PMP11455 5V, 9V, 15V use TPS25740A, but test only 5V, 8.8V no output 15V,
CLT1 5.9K >> 9.7K
CLT2 6.65K…
Other Parts Discussed in Thread: UCC28740 , UCC28730 , UCC28704 , UCC24636 , PMP11451 I tried to simulate a flyback converter in Webench for UCC28740 converter with the below specification. Input: 85-265 VAC @ 50 Hz, Output: 20V @ 3 Amps. When i entered the…
Please can anyone help me to get the specification for RLTI-1159 transformer used for AC-DC Converter(USB-C DFP, 20V/3A Out, Universal AC Input Reference Design)
www.ti.com/.../pmp11451
You will need a logic circuit or controller to adjust the reference, but the output voltage of the UCC28740 can be adjusted during operation.
I recommend implementing the UCC28740 in a similar fashion to PMP11451 . This reference is for USB PD applications…
Sandeep & John,
I am working on an updated version of the PMP11451 design that puts the TPS65982 & UCC28740/UCC24636 on 1 board and will support any standard PD voltage: 5, 9, 12 ,15, and 20 Volts.
Using the new CSD87501L (WCSP Back-to-Back…
Guifre,
First of all, for that power level (48 W), the original transformer inductance of 1.57 mH does not sound correct - that's far too high for such a high power level. In fact, even the value of 560 uH that you actually used sounds too high. Did…