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
6/35 Doc ID 022218 Rev 1
4 Electrical data
4.1 Maximum ratings
4.2 Thermal data
Table 4. Absolute maximum ratings
Symbol Parameter
Value
Unit
Min. Max.
V
DRAIN
Drain-to-source (ground) voltage 800 V
E
AV
Repetitive avalanche energy
(limited by T
J
= 150 °C)
5mJ
I
AR
Repetitive avalanche current
(limited by T
J
= 150 °C)
1.5 A
I
DRAIN
Pulse drain current 3 A
V
CONT
Control input pin voltage -0.3 6 V
V
FB
Feedback voltage -0.3 5.5 V
V
BR
Brownout input pin voltage -0.3 5 V
V
DD
Supply voltage (I
DD
= 25 mA) -0.3 Self limited V
I
DD
Input current 25 mA
P
TOT
Power dissipation at T
A
< 60 °C 1.5 W
T
J
Operating junction temperature range -40 150 °C
T
STG
Storage temperature -55 150 °C
Table 5. Thermal data
Symbol Parameter Max. value Unit
R
thJP
Thermal resistance junction pin
(Dissipated power = 1 W)
35 ° C/W
R
thJA
Thermal resistance junction ambient
(Dissipated power = 1 W)
80 ° C/W
R
thJA
Thermal resistance junction ambient
(1)
(Dissipated power = 1 W)
1. When mounted on a standard single side FR4 board with 150 mm
2
(0.155 sq. in.) of Cu (35 µm thick).
65 ° C/W