VIPER17_0810 STMICROELECTRONICS [STMicroelectronics], VIPER17_0810 Datasheet - Page 5

• Manufacturer Part Number: VIPER17_0810
• Description: Off-line high voltage converters
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

VIPER17
3
3.1
3.2
Table 3.
DIP-7
7,8
1
2
3
4
5
Pin N.
Pin description
13...16
Pin settings
Connection diagram
Figure 3.
Pin description
SO16
1...4
10
5
6
7
DRAIN
CONT
Name
GND
VDD
BR
FB
Connection diagram (top view)
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 start-up 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 3 V shuts the IC down
reducing the device consumption. This function is strobed 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 0.5 V activates the burst-mode
operation. A level close to 3.3 V means that we are approaching the cycle-by-
cycle over-current set point.
Brownout protection input with hysteresis. A voltage below 0.45 V shuts down
(not latch) the device and lowers the power consumption. Device operation
restarts as the voltage exceeds 0.45 V plus hysteresis voltage. It can be
connected to ground when not used.
High voltage drain pin. The built-in high voltage switched start-up bias current is
drawn from this pin too.
Function
CONT
GND
VDD
FB
Pin settings
DRAIN
DRAIN
BR
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