VIPER28HE STMicroelectronics, VIPER28HE Datasheet - Page 19

Switching Converters, Regulators & Controllers VIPer28 Rugged 800V Fixed freq 115 kHz

VIPER28HE

Manufacturer Part Number
VIPER28HE
Description
Switching Converters, Regulators & Controllers VIPer28 Rugged 800V Fixed freq 115 kHz
Manufacturer
STMicroelectronics
Datasheet

Specifications of VIPER28HE

Output Voltage
800 V
Output Current
3 A
Output Power
20 W
Input Voltage
8.5 V to 23.5 V
Switching Frequency
115 KHz
Operating Temperature Range
- 40 C to + 150 C
Mounting Style
Through Hole
Package / Case
SDIP-10
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
VIPER28HE
Manufacturer:
STM
Quantity:
2 000
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

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