Datasheet
Table Of Contents
- Figure 1. Typical topology
- Table 1. Device summary
- 1 Block diagram
- 2 Typical power
- 3 Pin settings
- 4 Electrical data
- 5 Typical electrical characteristics
- Figure 7. Current limit vs. TJ
- Figure 8. Switching frequency vs. TJ
- Figure 9. Drain start voltage vs. TJ
- Figure 10. HFB vs. TJ
- Figure 11. Brownout threshold vs. TJ
- Figure 12. Brownout hysteresis vs. TJ
- Figure 13. Brownout hysteresis current vs. TJ
- Figure 14. Operating supply current (not switching) vs. TJ
- Figure 15. Operating supply current (switching) vs. TJ
- Figure 16. Current limit vs. RLIM
- Figure 17. Power MOSFET ON resistance vs. TJ
- Figure 18. Power MOSFET breakdown voltage vs. TJ
- Figure 19. Thermal shutdown
- 6 Typical circuit
- 7 Efficiency performances for a typical flyback converter
- 8 Operation description
- 8.1 Power section and gate driver
- 8.2 High voltage startup generator
- 8.3 Power-up and soft-start
- 8.4 Power down operation
- 8.5 Auto-restart operation
- 8.6 Oscillator
- 8.7 Current mode conversion with adjustable current limit set point
- 8.8 Overvoltage protection (OVP)
- 8.9 About the CONT pin
- 8.10 Feedback and overload protection (OLP)
- 8.11 Burst mode operation at no load or very light load
- 8.12 Brownout protection
- 8.13 2nd level overcurrent protection and hiccup mode
- 9 Package mechanical data
- 10 Revision history
Electrical data VIPER37
10/35 Doc ID 022218 Rev 1
Table 8. Controller section (continued)
Symbol Parameter Test condition Min. Typ. Max. Unit
Overcurrent protection (2
nd
OCP)
I
DMAX
Second overcurrent
threshold
1.7 A
Overvoltage protection
V
OVP
Overvoltage protection
threshold
2.733.3V
T
STROBE
Overvoltage protection
strobe time
2.2 us
Brownout protection
V
BRth
Brownout threshold Voltage falling 0.41 0.45 0.49 V
V
BRhyst
Voltage hysteresis above
V
BRth
Voltage rising 50 mV
I
BRhyst
Current hysteresis 7 12 µA
V
BRclamp
Clamp voltage I
BR
= 250 µA 3 V
V
DIS
Brownout disable voltage 50 150 mV
Thermal shutdown
T
SD
Thermal shutdown
temperature
150 160 °C
T
HYST
Thermal shutdown
hysteresis
30 °C