VIPER20-E STMicroelectronics, VIPER20-E Datasheet - Page 21

• Manufacturer Part Number: VIPER20-E
• Description: IC SWIT SMPS CM OTP PENTAWATT5
• Manufacturer: STMicroelectronics
• Series: VIPER™r

Specifications of VIPER20-E

• Output Isolation: Isolated
• Frequency Range: 90 ~ 200kHz
• Voltage - Input: 8 ~ 15 V
• Voltage - Output: 620V
• Power (watts): 57W
• Operating Temperature: 25°C ~ 125°C
• Package / Case: Pentawatt-5 HV (Bent and Staggered Leads)
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6794-5; VIPER20-E

VIPer20-E/DIP-E
6
6.1
Figure 23. Input Voltage Surges Protection
Bulk capacitor
C1
Electrical Over Stress
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
may trigger the V
discharge current of the V
implemented to improve the application immunity to such surges.
DD
22nF
C2
internal protection circuitry which could be damaged by the strong
DD
OSC
VIPerXX0
bulk capacitor. The simple RC filter shown in
13V
DD
VDD
39R
R2
-
+
pin absolute maximum rating voltage value. Such events
COMP SOURCE
(Optional)
R1
DRAIN
D1
Auxilliary winding
6 Electrical Over Stress
Figure 23
can be
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