VIPER100 STMicroelectronics, VIPER100 Datasheet - Page 3

IC SWIT PWM SMPS CM PENTAWATT5

VIPER100

Manufacturer Part Number
VIPER100
Description
IC SWIT PWM SMPS CM PENTAWATT5
Manufacturer
STMicroelectronics
Series
VIPER™r
Datasheet

Specifications of VIPER100

Output Isolation
Isolated
Frequency Range
90 ~ 200kHz
Voltage - Input
8 ~ 15 V
Voltage - Output
620V
Power (watts)
82W
Operating Temperature
25°C ~ 125°C
Package / Case
Pentawatt-5 HV (Bent and Staggered Leads)
Output Voltage
620 V
Output Current
2 A
Input Voltage
0 V to 15 V
Switching Frequency
200 KHz
Operating Temperature Range
- 65 C to + 150 C
Mounting Style
Through Hole
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-2714-5

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VIPer100/SP - VIPer100A/ASP
Table 5.
Pins Functional Description
Drain Pin (Integrated Power MOSFET Drain):
Integrated Power MOSFET drain pin. It provides internal bias current during start-up via an integrated
high voltage current source which is switched off during normal operation. The device is able to handle
an unclamped current during its normal operation, assuring self protection against voltage surges, PCB
stray inductance, and allowing a snubberless operation for low output power.
Suorce Pin:
Power MOSFET source pin. Primary side circuit common ground connection.
V
This pin provides two functions :
Compensation Pin
This pin provides two functions :
OSC Pin (Oscillator Frequency):
An R
connection of R
provides also a synchronisation capability, when connected to an external frequency source.
DD
It corresponds to the low voltage supply of the control part of the circuit. If V
up current source is activated and the output power MOSFET is switched off until the V
reaches 11V. During this phase, the internal current consumption is reduced, the V
a current of about 2mA and the COMP pin is shorted to ground. After that, the current source is shut
down, and the device tries to start up by switching again.
This pin is also connected to the error amplifier, in order to allow primary as well as secondary
regulation configurations. In case of primary regulation, an internal 13V trimmed reference voltage is
used to maintain V
on V
high state. The COMP pin behaves as a constant current source, and can easily be connected to the
output of an optocoupler. Note that any overvoltage due to regulation loop failure is still detected by the
error amplifier through the V
somewhat higher than the nominal one, but still under control.
It is the output of the error transconductance amplifier, and allows for the connection of a compensation
network to provide the desired transfer function of the regulation loop. Its bandwidth can be easily
adjusted to the needed value with usual components value. As stated above, secondary regulation
configurations are also implemented through the COMP pin.
When the COMP voltage is going below 0.5V, the shut-down of the circuit occurs, with a zero duty cycle
for the power MOSFET. This feature can be used to switch off the converter, and is automatically
activated by the regulation loop (no matter what the configuration is) to provide a burst mode operation
in case of negligible output power or open load condition.
Pin (Power Supply):
t
-C
DD
t
network must be connected on that to define the switching frequency. Note that despite the
pin by transformer design, in order to stuck the output of the transconductance amplifier to the
Ordering Numbers
t
to V
PENTAWATT HV
VIPer100A
VIPer100
DD
DD
at 13V. For secondary regulation, a voltage between 8.5V and 12.5V will be put
, no significant frequency change occurs for V
DD
voltage, which cannot overpass 13V. The output voltage will be
PENTAWATT HV (022Y)
VIPer100A (022Y)
VIPer100 (022Y)
DD
DD
varying from 8V to 15V. It
goes below 8V, the start-
DD
pin is sourcing
DD
voltage
3/24

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