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
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Figure 12. Oscillator
Rt
C
t
OSC
VDD
~360
Ω
CLK
FC00050
For R
t
>1.2K
Ω
and
C
t
≥
15nF if F
SW
≤
40KHz
F
SW
2.3
R
t
C
t
---------- - 1
550
R
t
150–
---------- ---------
-
–
⎝⎠
⎛⎞
⋅
=
C
t
Fs
w
40kHz
15nF
22nF
Forbidden area
Forbidden area
Ct(nF) =
Fsw(kHz)
880
1 2 3 5 10 20 30 50
30
50
100
200
300
500
1,000
Rt (k
Ω
)
Frequency (kHz)
Oscillator frequency vs Rt and Ct
Ct = 1.5 nF
Ct = 2.7 nF
Ct = 4.7 nF
Ct = 10 nF
FC00030FC00030