SLUAAJ7 June 2022 UCC256402 , UCC256403 , UCC256404
- Abstract
- Trademarks
- 1UCC25640x Selection Guide
- 2UCC25640x Features Brief Overview
- 3UCC25640x Power Up Guidelines and Debugging Notes
- 4References
2.2.4 Typical Waveforms of HV Startup and XCAP Discharge
Figure 2-8 Test
Condition: AC Plugged in, BLK UVLO; Ch1 – LO, Ch2 – VCC, Ch3 – RVCC, Ch4 –
HV
Figure 2-9 Zoomed In: Test Condition: AC Plugged in, BLK UVLO; Ch1 – LO, Ch2 – VCC,
Ch3 – RVCC, Ch4 – HVIn Figure 2-8 and Figure 2-9, we can observe that whenever test current being injected (for every 700 ms) HV pin voltage is being pulled down. Also, when VCC is reduced to VCCRestartJFET threshold, VCC charging is initiated.
Figure 2-10 Waveform Capture of AC Input
Removal and X-cap Discharge