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UCC28056 System Bring Up Guidelines and Application Debug FAQs
SLUAAH3
October 2021
UCC28056
CONTENTS
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UCC28056 System Bring Up Guidelines and Application Debug FAQs
Trademarks
1
How to Select the Correct Devices Version of UCC28056 Families?
2
How to Complete the Schematic Review of the UCC28056?
2.1
VOSNS Pin
2.2
ZCD/CS Pin
2.3
DRV Pin
2.4
GND Pin
2.5
VCC Pin
2.6
COMP Pin
3
How to Test and Confirm the UCC28056 Working Mode?
3.1
How to Capture the ZCD/CS Waveform?
3.2
How to Evaluate UCC28056 Normal Operation Mode Waveform?
4
Protections and how to Identify Them?
4.1
OVP1
4.2
OVP2
4.3
OCP1
4.4
OCP2
5
Application Debug Frequently Asked Questions (FAQs).
5.1
How is the UCC28056 GND Pin Connected?
5.2
There is CCM Inductor Current During Start-Up, is This a Normal Phenomenon?
5.3
How to Fine-Tune the RC Parameter on the ZCD/CS Pin?
5.4
Is it Possible to Increase the High Voltage Cap Value on the ZCD Cap Divider?
5.5
How to Separate the TONMAX Limit or OCP Protection When the PFC Output Voltage Cannot Follow the Regulated Voltage?
5.6
Does UCC28056 Support DC Input Application?
5.7
How Does RDG Change the Delay Time for Valley Switching Detection of the MOSFET?
5.8
Can UCC28056 Meet Harmonic Performance?
5.9
Does UCC28056 Have Soft Start?
5.10
Does the UCC28056 Support Auxiliary-Winding PFC Inductor Input on the ZCD Pin?
6
References
IMPORTANT NOTICE
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