VIPER37LE STMicroelectronics, VIPER37LE Datasheet - Page 25

• Manufacturer Part Number: VIPER37LE
• Description: AC/DC Switching Converters ViperPlus Fixed Freq 800V 30mQ 265 Vac
• Manufacturer: STMicroelectronics
• Type: Off Line Switcherr

Specifications of VIPER37LE

• Product Category: AC/DC Switching Converters
• Input / Supply Voltage (max): 23.5 V
• Input / Supply Voltage (min): 8.5 V
• Switching Frequency: 60 kHz
• Supply Current: 2.5 mA
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Package / Case: SDIP-10
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 25 C
• Number Of Outputs: 1
• Output Power: 25 W

VIPER37
8.9
The resistor values are such that the current sourced and sunk by the CONT pin are within
the rated capability of the internal clamp.
Figure 28. OVP timing diagram
About the CONT pin
Referring to
1.
2.
Table 11
activate one or more of the CONT pin functions.
Figure 29. CONT pin configuration
COUNTER
COUNTER
COUNTER
COUNTER
STATUS
STATUS
STROBE
STROBE
RESET
RESET
V OVP
VAUX
CONT
(pin 4)
(pin 4)
FAULT
FAULT
V
V
OVP
OVP
DS
DS
Current limit set point
Overvoltage protection on the converter output voltage
Auxiliary
winding
0
0
D
, referring to
AUX
0
0
N
N
O
O
R
R
Figure 29
M
M
A
A
T
L
L
STROBE
O
O
R
0
0
P
P
OVP
E
E
R
R
A
A
T
T
sampling time
O I
O I
N
N
Figure 29
, the features below can be implemented through the CONT pin:
0
0
R
CONT
LIM
0 → 1
0 →
Doc ID 022218 Rev 1
T
T
, lists the external resistance combinations needed to
E
E
M
M
P
P
O
O
R
R
A
A
R
R
Y
Y
1 → 2
1 →
OVP DETECTION
D
D
S I
S I
T
T
U
U
R
R
LOGIC
B
B
A
A
N
N
To OVP Protection
C
C
2 → 0
2 →
START
E
E
SOFT
0
0
Curr. Lim.
BLOCK
0 → 1
0 →
From SenseFET
F
F
E
E
E
E
D
D
B
B
A
A
1 → 2
1 →
C
C
K
K
Operation description
L
L
O
O
O
O
P
P
Current Limit Comparator
+
F
F
-
A
A
L I
L I
2 → 3
2 →
U
U
R
R
E
E
OCP
To PWM Logic
3 → 4
3 →
25/35
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t