Part Number: UCC28742 Hello TI,
As the title suggests, I have encountered some problems with my design. I was trying to build a Flyback DC-DC Converter for a project at my university, but for some reason, the IC won't drive the MOSFET as expected. When…
Part Number: UCC28742 Other Parts Discussed in Thread: UCC28740 Hi,
can I design (inductance and transformer turns ratio) the UCC28742 to run at 100KHz? The first page in the d/s mentioned 80KHz.
Regards, Holger
Part Number: UCC28742 Other Parts Discussed in Thread: UCC28740 , , PMP
Team, -Brown-out: With both UCC28740 and UCC28742 controllers, a brown-out function can be set via the resistors on the VS pin. Do we have more information on the Brown-out function? …
Part Number: UCC28742 Documents share with TI.zip 5758.photo.zip
原理图、PCB图和测试设备都在附件中。当用隔离探头同时测量UCC28742控制的MOS管的Vgs和Vds时,电路板爆炸。请解释和分析这一现象。注意:在PCBA中使用其他品牌的电源管理芯片时,不存在这种现象。
Hi JCHK,
Thank you very much for your reply and I'm sorry to be late my response. Your reply is very helpful for us.
Thank you again and best regards, Kazuya.
Part Number: UCC28742 Hello guys,
One of my customers run Webench to design a flyback power supply as the following conditions using UCC28742.
Vin = 1200V, (1.2kV) Vo = 24V, Io = 6A
The result is attached. In the result, transformer drive NMOS FET (M1) is…
Part Number: UCC28742 Hi Team,
I have some questions about UCC28742-
1) What's the relationships between Vocp(1.5V), Vccr(363mV) and Vcst_max(770mV)? And what's the function of each parameter? According to the datasheet, Rcs is determined by the Iocc…
Part Number: UCC28742 Hello Sir/Madam,
I have designed 25W,18V flyback converter using UCC28742. We are facing issue during startup. IC is turning off after around 900ms.
Below are the attached waveform of CS, VDD, AUX(VS gain is 10/57) and VDS.
.
I…