Other Parts Discussed in Thread: UCC28950, UCC28250, TINA-TI
Hi Team,
We are developing 300V DC output switched mode power supply using UCC28251 PWM controller.I have connected 0.1uf capacitor in SS pin. While testing IC alone by giving 5V VDD, we found that voltage across the SS pin is 3.5V and it is not varying if i increased the output. But i saw in your datasheet that it should be 0V intilally and varies with respect to output voltage.But in this case it shows constant 3.5V. Please help me out. Thankyou