VIPER17LDTR STMicroelectronics, VIPER17LDTR Datasheet - Page 22
![IC OFFLINE CONV PWM OVP 16SOIC](/photos/7/32/73267/viper17ldtr_sml.jpg)
VIPER17LDTR
Manufacturer Part Number
VIPER17LDTR
Description
IC OFFLINE CONV PWM OVP 16SOIC
Manufacturer
STMicroelectronics
Series
VIPer™ plusr
Datasheet
1.VIPER17LDTR.pdf
(31 pages)
Specifications of VIPER17LDTR
Output Isolation
Isolated
Frequency Range
54 ~ 66kHz
Voltage - Input
8.5 ~ 23.5 V
Voltage - Output
800V
Power (watts)
12W
Operating Temperature
-40°C ~ 150°C
Package / Case
16-SOIC (0.154", 3.90mm Width) Exposed Pad
For Use With
497-9052 - BOARD EVAL FOR VIPER17LN497-9050 - 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
497-7048-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
VIPER17LDTR
Manufacturer:
ST
Quantity:
20 000
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
.