VIPER28HN STMicroelectronics, VIPER28HN Datasheet - Page 19

IC OFFLINE CONV PWM OVP 8DIP

VIPER28HN

Manufacturer Part Number
VIPER28HN
Description
IC OFFLINE CONV PWM OVP 8DIP
Manufacturer
STMicroelectronics
Series
VIPer™ plusr
Datasheet

Specifications of VIPER28HN

Output Isolation
Isolated
Frequency Range
103 ~ 127kHz
Voltage - Input
8.5 ~ 23.5 V
Voltage - Output
800V
Power (watts)
20W
Operating Temperature
-25°C ~ 125°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
497-8840 - EVAL BOARD FOR VIPER28LD 60KHZ497-8839 - EVAL BOARD FOR VIPER28HD 115KHZ
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-8391-5

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
VIPER28HN
Quantity:
14 714
Part Number:
VIPER28HN
Manufacturer:
ST
0
Part Number:
VIPER28HN
Manufacturer:
ST
Quantity:
20 000
Part Number:
VIPER28HN
Manufacturer:
ST
Quantity:
9 867
Part Number:
VIPER28HN.
Manufacturer:
ST
0
VIPER28
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 22. OVP timing diagram
COUNTER
COUNTER
COUNTER
COUNTER
STATUS
STATUS
STROBE
STROBE
RESET
RESET
V CONT
FAULT
FAULT
V AUX
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 15028 Rev 4
T
T
E
E
M
M
P
P
O
O
R
R
R
A
A
OVP
R
R
Y
Y
Table 8 on page
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
2 →0
2 →0
C
C
E
E
, the R
×
1 k
---------------------- -
k
OVP
0
0
OVP
OVP
8)
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
19/32
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t

Related parts for VIPER28HN