VIPER17HN STMicroelectronics, VIPER17HN Datasheet - Page 22

IC OFFLINE CONV PWM OVP OCP 8DIP

VIPER17HN

Manufacturer Part Number
VIPER17HN
Description
IC OFFLINE CONV PWM OVP OCP 8DIP
Manufacturer
STMicroelectronics
Series
VIPer™ plusr
Datasheet

Specifications of VIPER17HN

Output Isolation
Isolated
Frequency Range
103 ~ 127kHz
Voltage - Input
8.5 ~ 23.5 V
Voltage - Output
800V
Power (watts)
12W
Operating Temperature
-40°C ~ 150°C
Package / Case
8-DIP (0.300", 7.62mm), 7 Leads
Output Voltage
800 V
Output Power
1 W
Input Voltage
- 0.3 V
Switching Frequency
115 KHz
Operating Temperature Range
- 40 C to + 150 C
Mounting Style
Through Hole
Duty Cycle (max)
80 %
Number Of Outputs
1
For Use With
497-9050 - BOARD DEMO BASED ON VIPER17HN497-9007 - BOARD EVAL BASED ON VIPER17497-8513 - BOARD EVAL VIPER17HN 6W SMPS497-8250 - BOARD EVAL FOR VIPER17497-6447 - BOARD EVAL FOR VIPER17L497-6446 - BOARD EVAL FOR VIPER17H
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-6950-5
VIPER17HN

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Operation descriptions
22/31
Equation 7
Equation 8
The R
The C
The
considered instead of C
satisfy, in all case, the loop stability and the enough OLP delay time alike.
Figure 28. FB pin configuration
Figure 29. FB pin configuration
Equation 5
FB(DYN)
FB1
capacitor fixes the OLP delay and usually C
is the dynamic resistance seen by the FB pin.
can be still used to calculate the OLP delay time but C
Rfb1
Cfb1
FB
. Using the alternative compensation network, the designer can
Cfb
f
f
PFB
PFB
Cfb
Doc ID 14419 Rev 7
1
=
=
2
2
⋅ π
⋅ π
CONTROL
R
C
C
PWM
FB
FB
FB
CONTROL
PWM
BURST-MODE
1
(
DYN
References
(
(
R
R
1
FB
)
FB
References
+
V FBolp
1
(
DYN
R
+
V FBolp
FB
R
FB1
)
FB
OLP comparator
1
R
(
DYN
results much higher than C
BURST-MODE
PWM
OLP comparator
FB
From sense FET
+
+
-
-
LOGIC
1
)
BURST-MODE
)
)
PWM
From R
+
+
-
-
LOGIC
SENSE
To disable logic
To PWM Logic
To disable logic
FB1
BURST
To GATE driver
BURST
has to be
VIPER17
FB
.

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