VIPER16HD STMicroelectronics, VIPER16HD Datasheet - Page 18
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VIPER16HD
Manufacturer Part Number
VIPER16HD
Description
IC OFFLINE CONV PWM OTP 16-SOIC
Manufacturer
STMicroelectronics
Series
VIPer™ plusr
Datasheet
1.VIPER16HDTR.pdf
(24 pages)
Specifications of VIPER16HD
Output Isolation
Either
Frequency Range
103 ~ 127kHz
Voltage - Input
11.5 ~ 23.5 V
Voltage - Output
800V
Power (watts)
12W
Operating Temperature
-40°C ~ 150°C
Package / Case
16-SOIC (0.154", 3.90mm Width)
Output Power
1 W
Input Voltage
3.3 V
Switching Frequency
115 KHz
Mounting Style
SMD/SMT
Duty Cycle (max)
80 %
For Use With
497-9006 - BOARD EVAL BASED ON VIPER16497-8836 - EVAL BOARD FOR VIPER16HD497-8835 - EVAL BOARD FOR VIPER16HD ISO PSU
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
VIPER16HD
Manufacturer:
STMicroelectronics
Quantity:
1 890
Company:
Part Number:
VIPER16HD
Manufacturer:
STMicroelectronics
Quantity:
400
Open loop failure protection
15
18/24
Open loop failure protection
In case the power supply is built in fly-back topology and the VIPer16 is supplied by an
auxiliary winding, as shown in
converter is protected against feedback loop failure or accidental disconnections of the
winding.
The following description is applicable for the schematics of
Figure 28 on page
If R
voltage, V
output through the secondary-to-auxiliary turns ratio.
As the auxiliary voltage increases up to the internal V
reported on
latch threshold, I
generated.
In order to distinguish an actual malfunction from a bad auxiliary winding design, both the
above conditions (drain current equal to the drain current limitation and current higher than
I
If R
voltage V
case of isolated fly-back).
Figure 27. FB pin connection for non-isolated fly-back
DDol
H
L
is opened or R
through VDD clamp) have to be verified to reveal the fault.
is opened or R
REF_FB
OUT
Table 8 on page
, will increase and so the auxiliary voltage, V
R
R
H
L
DDol
(in case of non isolated fly-back) or to the external TL voltage reference (in
V
OUT
19, respectively the non-isolated fly-back and the isolated fly-back.
L
H
(the value is reported on
is shorted, the VIPer16 works at its drain current limitation. The output
is shorted, the output voltage, V
FB
C
VDD
7) and the clamp current injected on VDD pin exceeds the
V
Doc ID 15232 Rev 4
REF_FB
Figure 27 on page 18
VDD
-
+
E/A
C
COMP
P
BUS
Table 8 on page
R
C
S
S
nR
V
from R
COMPL
and
DD
R
OUT
SENSE
+
-
+
-
active clamp, V
Figure 28 on page
, will be clamped to the reference
AUX
Figure 27 on page 18
, which is coupled with the
PWM stop
to PWM
7), a fault signal is internally
R
AUX
DDclamp
D
AUX
19, the
(the value is
and
VIPER16
V
AUX