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TPS23754
Texas Instruments TPS23754 PoE Controller Manuals
Manuals and User Guides for Texas Instruments TPS23754 PoE Controller. We have
1
Texas Instruments TPS23754 PoE Controller manual available for free PDF download: User Manual
Texas Instruments TPS23754 User Manual (21 pages)
PoE Powered Devices Debug Guidelines
Brand:
Texas Instruments
| Category:
Controller
| Size: 2 MB
Table of Contents
Table of Contents
1
Introduction
2
Preparation and Measurement Techniques
2
Important Poe Signals
2
Lab Equipment
3
Measurement Techniques
3
Figure 2-1. Poe Start-Up
3
Board Preparation
4
Figure 2-2. Switching Waveform
4
Narrowing down the Problem Area
5
Schematic Areas
5
Figure 3-1. Poe Input Section
5
Figure 3-2. Poe IC Settings
6
Figure 3-3. Input Filter
7
Figure 3-4. DC/DC Pin Settings
7
Figure 3-5. VCC Input Circuit for Active Clamp Forward
8
Figure 3-6. VCC Input Circuit for Primary-Side Regulation Flyback
8
Figure 3-7. VCC Input Circuit for Optocoupler Flyback
8
Figure 3-8. Primary Side Feedback PSR Flyback
9
Figure 3-9. Primary Side Feedback Optocoupler Flyback
9
Figure 3-10. Primary Side Mosfets and Accompanying Components
10
Figure 3-11. Primary Side MOSFET RCD Snubber
11
Figure 3-12. Secondary Side Diode Rectified Flyback
12
Figure 3-13. Secondary Side Self Driven Synchronous Flyback a
12
Figure 3-14. Secondary Side Self Driven Synchronous Flyback B
13
Figure 3-15. Secondary Side Driven Synchronous Flyback
13
Figure 3-16. Secondary Side Active Clamp
14
Narrowing down the Area on Board
15
Figure 3-18. Secondary Side Optocoupler Feedback Network
15
Figure 3-19. Poe Handshake
15
Figure 3-20. Poe DC/DC Start-Up
16
Common Issues
17
Figure 3-21. Current Sense Switching Waveform
17
Conclusion
20
Capacitance
20
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