EVLVIPER28L-10W STMicroelectronics, EVLVIPER28L-10W Datasheet - Page 19

• Manufacturer Part Number: EVLVIPER28L-10W
• Description: EVAL BOARD FOR VIPER28LD 60KHZ
• Manufacturer: STMicroelectronics
• Series: VIPER™r
• Type: AC/DC Switching Convertersr

Specifications of EVLVIPER28L-10W

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 12W
• Voltage - Output: 5V
• Current - Output: 2.4A
• Voltage - Input: 85 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 60kHz
• Board Type: Fully Populated
• Utilized Ic / Part: VIPer28
• Input Voltage: 85 V to 265 V
• Output Voltage: 5 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: VIPER28LN
• Other names: 497-8840

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