Hong
the -1.2v negative peak is measured mainly related with customer circuit in which UCC28C44 drives couple transformer which schematic is similar with below . the Schottky diode was already added and the loop from OUT to Pin is very slow, but the -1.2V…
Part Number: UCC28C44 Hi team,
Could you please help to provide the probability distribution in the range of 13.5~15.5V of VDD_ON and 50uA~100uA of I_Start up?
BRs,
Rannie
Part Number: UCC28C44 Hi team,
When the FB under sampling feedback, the optocoupler secondary is directly connected to the comp pin of the chip 28C44. Is the comp pin voltage provided by the Vref pin or the internal current source of the chip?
Base on…
Part Number: UCC28C44 Hi team,
My customer is using our UCC28C44, and they are doing short circuit test.
And they find when our UCC28C44 is in OCP mode, the COMP pin voltage is 5.8V and VREF pin also 5.8V. Waveforms are as below:
CH1(yellow)：COMP pin …
Part Number: UCC28C44 Hi team:
my customer will use ucc28c44 in their solar system. they target to set a UVLO circuit to detect the high bus voltage, can you help to share some refer design for this case?
tks!
here are the details use case.
1. 680~1000Vin…
Part Number: UCC28C44 Hi team,
My customer is suing the UCC28C44 and they find when the UCC28C44 start up at no-load condition, it will have a hiccup and then start up:
Could you please kindly help check is it correct for the device & how to avoid this…
Part Number: UCC28C44 Other Parts Discussed in Thread: TL2844 Hi team,
My customer want to do early evaluation on thermal test by just pin 2 pin replace TL2844 by UCC28C44 since UCC28C44 has lower start up and working current than TL2844. Should we advise…
Part Number: UCC28C44 Other Parts Discussed in Thread: TL3844 Hi Team,
Could you please help me further understand what's the difference between UCC28C44 and UC/TL3844?
I only find there are differences in switch frequency, UVLO and supply voltage…
Part Number: UCC28C44 Other Parts Discussed in Thread: UCC28C41 , UCC28C43 , UCC28C53
Hi,
I created a booster circuit using UC28C43. It worked fine in Tina TI, but I cannot simulate in Pspice for TI. I tried swapping models with UCC28C41 and UCC28C43 but…
