VIPER37HE STMicroelectronics, VIPER37HE Datasheet - Page 5

• Manufacturer Part Number: VIPER37HE
• Description: AC/DC Switching Converters ViperPlus Fixed Freq 800V 30mQ 265 Vac
• Manufacturer: STMicroelectronics
• Type: Off Line Switcherr

Specifications of VIPER37HE

• Product Category: AC/DC Switching Converters
• Rohs: yes
• Input / Supply Voltage (max): 23.5 V
• Input / Supply Voltage (min): 8.5 V
• Switching Frequency: 115 kHz
• Supply Current: 3.5 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
3
Note:
Pin settings
Figure 3.
The copper area for heat dissipation must be designed under the DRAIN pins.
Table 3.
Pin n.
6...10
1
2
3
4
5
DRAIN
CONT
Name
GND
VDD
BR
FB
Connection diagram (top view)
Pin description
This pin represents the device ground and the source of the power section.
Supply voltage of the control section. This pin also provides the charging current
of the external capacitor during startup time.
Control pin. The following functions can be selected:
1. current limit set point adjustment. The internal set default value of the cycle-by-
cycle current limit can be reduced by connecting to ground an external resistor.
2. output voltage monitoring. A voltage exceeding the V
Table 8
stropped and digitally filtered for high noise immunity.
Control input for duty cycle control. Internal current generator provides bias
current for loop regulation. A voltage below the threshold V
burst mode operation. A level close to the threshold V
approaching the cycle-by-cycle overcurrent set point.
Brownout protection input with hysteresis. A voltage below the threshold V
shuts down (not latched) the device and lowers the power consumption. Device
operation restarts as the voltage exceeds the threshold V
It can be connected to ground when not used.
High voltage drain pin. The built-in high voltage switched startup bias current is
drawn from this pin too.
Pins connected to the metal frame to facilitate heat dissipation.
) shuts the IC down reducing the device consumption. This function is
Doc ID 022218 Rev 1
Function
FBlin
OVP
BRth
means that we are
FBbm
threshold (see
+ V
activates the
BRhyst
Pin settings
.
BRth
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