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 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.
Part Number: UCC28742
Hi, I have a few questions about the default example in the design spreadsheet
In the design calculator, the overvoltage thresholds are VOUT_OVPnom = 5.3V and VOUT_OVPmin = 5.023V (calc cell C191).
VOUT_CV = 5V, VOUTripple = 50…
Part Number: UCC28742 Hi,
1. Equation 14 for Lp calculation in the datasheet (pg26 datasheet) uses Ipp_max but in the calc tool (cell C92 of calculations tab) it uses Ipp_nom . Which one is the correct equation?
2. VDbias_blocking (cell C147 of calculations…
Part Number: UCC28742 Hi expert team
I'm Joe, GZ FAE and my account is SAJ. The EE of my account is solar inverter and battery inverter.
Typically they use flyback to build an auxiliary power to make an isolated power for the control circuit.