Other Parts Discussed in Thread: UCC5320
Regarding the Vcc1 supply voltage and IN+ pin voltage IN UCC5350-Q1 chip, according to Figure 9-8, IN+ and Vcc1 pins inside the chip are connected through a diode in the red box below:
1, when the IN+ voltage is 3.3V, after the voltage drop of the diode is transmitted to Vcc1, will the voltage of Vcc1 be greater than the minimum value of its supply voltage 3V? If it is greater than 3V, will it cause the chip to open in advance?
2. What is the diode voltage drop between the internal IN+ and Vcc1? When the IN+ voltage is 3.3V, how to assess the risk of early chip opening?