VIPER27HN STMicroelectronics, VIPER27HN Datasheet - Page 19
VIPER27HN
Manufacturer Part Number
VIPER27HN
Description
IC OFFLINE CONV PWM OVP 7DIP
Manufacturer
STMicroelectronics
Series
VIPer™ plusr
Specifications of VIPER27HN
Output Isolation
Isolated
Frequency Range
103 ~ 127kHz
Voltage - Input
8.5 ~ 23.5 V
Voltage - Output
800V
Power (watts)
24W
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
497-9084 - EVAL BOARD FOR VIPER27LX
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-8389-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
VIPER27HN
Manufacturer:
ST
Quantity:
4 500
Company:
Part Number:
VIPER27HN
Manufacturer:
ST
Quantity:
23 994
VIPER27
Where:
●
●
●
●
●
●
●
Than, fixed R
Equation 4
The resistor values will be such that the current sourced and sunk by the CONT pin be
within the rated capability of the internal clamp.
Figure 26. OVP timing diagram
COUNTER
COUNTER
COUNTER
COUNTER
STATUS
STATUS
STROBE
STROBE
RESET
RESET
V CONT
V AUX
FAULT
FAULT
V
V
V
OVP
OVP
OVP
DS
DS
V
V
N
N
V
V
R
OVP
OUT OVP
DSEC
DAUX
AUX
SEC
OVP
0
0
0
0
is the OVP threshold (see
N
N
is the auxiliary winding turns
is the secondary winding turns
together R
O
O
is the auxiliary diode forward voltage
is the secondary diode forward voltage
R
R
M
M
LIM,
A
A
2 µs
2 µs
L
L
is the converter output voltage value to activate the OVP set by designer
O
O
0
0
P
P
E
E
according to the desired I
R
R
A
A
T
T
O I
O I
N
N
LIM
0.5 µs
0.5 µs
0
0
make the output voltage divider
0 →1
0 →1
Doc ID 15133 Rev 5
T
T
E
E
M
M
P
P
O
O
R
R
R
A
A
OVP
R
R
Y
Y
Table 8 on page 7
1 →2
1 →2
D
D
S I
S I
T
T
U
U
=
R
R
B
B
R
A
A
Dlim
N
N
LIM
C
C
2 →0
2 →0
E
E
, the R
×
1 k
---------------------- -
–
k
OVP
0
0
OVP
OVP
)
can be calculating by:
0 →1
0 →1
F
F
E
E
E
E
D
D
B
B
A
A
1 → 2
1 → 2
C
C
Operation descriptions
K
K
L
L
O
O
O
O
P
P
F
F
A
A
L I
L I
2 →3
2 →3
U
U
R
R
E
E
3 → 4
3 → 4
19/31
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t