Datasheet
Table Of Contents
- Table 1. General Features
- Figure 1. Block Diagram
- Figure 2. Package
- Table 2. Absolute Maximum Rating
- Table 3. Thermal data
- Figure 3. Connection Diagrams (Top View)
- Table 4. Current and Voltage Convention
- Table 5. Ordering Numbers
- Table 6. Avalance Characteristics
- Table 7. Power Section
- Table 8. Supply Section
- Table 9. Oscillator Section
- Table 10. Error Amplifier Section
- Table 11. PWM Comparator Section
- Table 12. Shutdown and Overtemperature Section
- Figure 4. VDD Regulation Point
- Figure 5. Undervoltage Lockout
- Figure 6. Transition Time
- Figure 7. Shutdown Action
- Figure 8. Breakdown Voltage vs. Temperature
- Figure 9. Typical Frequency Variation
- Figure 10. Start-Up Waveforms
- Figure 11. Over-temperature Protection
- Figure 12. Oscillator
- Figure 13. Error Amplifier frequency Response
- Figure 14. Error Amplifier Phase Response
- Figure 15. Avalanche Test Circuit
- Figure 16. Offline Power Supply With Auxiliary Supply Feedback
- Figure 17. Offline Power Supply With Optocoupler Feedback
- Figure 18. Behaviour of the high voltage current source at start-up
- Figure 19. Mixed Soft Start and Compensation
- Figure 20. Latched Shut Down
- Figure 21. Typical Compensation Network
- Figure 22. Slope Compensation
- Figure 23. External Clock Sinchronisation
- Figure 24. Current Limitation Circuit Example
- Figure 25. Input Voltage Surges Protection
- Figure 26. Recommended Layout
- Figure 27. Pentawatt HV Tube Shipment ( no suffix )
- Table 13. Revision history
VIPer100/SP - VIPer100A/ASP
18/24
Figure 25. Input Voltage Surges Protection
Electrical Over Stress Ruggedness
The VIPer may be submitted to electrical over-stress, caused by violent input voltage surges or lightning.
Following the Layout Considerations is sufficient to prevent catastrophic damages most of the time.
However in some cases, the voltage surges coupled through the transformer auxiliary winding can
exceed the V
DD
pin absolute maximum rating voltage value. Such events may trigger the V
DD
internal
protection circuitry which could be damaged by the strong discharge current of the V
DD
bulk capacitor.
The simple RC filter shown in (see Figure 25) page 17 can be implemented to improve the application
immunity to such surges.
C1
B
ulk capacitor
D1
R1
(Optional)
C2
22nF
Auxilliary windin
g
13V
OSC
COMP
SOURCE
DRAIN
VDD
-
+
VIPerXX0
R2
39R