VIPER35 Datasheet, PDF (1/44 Pages) STMicroelectronics – Quasi-resonant high performance off line high voltage converter

VIPer35
Quasi-resonant high performance off line high voltage converter
621
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Figure 1. Basic application schematic
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Features
• 800 V avalanche-rugged power MOSFET
allowing ultra wide range input V_AC to be
achieved
• Embedded HV start-up and senseFET
• Built-in soft-start
• Quasi-resonant current mode PWM controller
with drain current limit (I_Dlim)
• Multifunction ZCD pin:
– Zero-current detection
– OCP threshold (I_Dlim) setup
– Output OVP (auto-restart)
– Feed-forward compensation
• Support isolated flyback topology with opto-
coupler
• Frequency limit:
– 136 kHz (L type), 225 kHz (H type)
Datasheet - production data
• Less than 30 mW @ 230 V_AC in no-load
condition
• Brown-out set through resistor divider
• Short-circuit protection (auto-restart)
• Hysteretic thermal shutdown
Applications
• Auxiliary power supply
• Adapter/charger for PDA, camcorders,
shavers, tablet, video games, STB
• Supplies for industrial systems, metering,
appliances
Description
The device is a high voltage converter, which
smartly integrates an 800 V rugged power
MOSFET with a quasi-resonant current mode
PWM control. This IC meets severe energy
saving standards as it has very low consumption
and operates in burst mode under light load
conditions.
The device features the brown-out enabling the
IC to set the switch-off and switch-on threshold
independently one of each other. The quasi-
resonant operation reduces the level of EMI and
the quantity of components in the application.
The quasi-resonant operation reduces the
switching losses and improves power conversion
efficiency. The device features high level
protections such as: output overvoltage, short-
circuit and thermal shutdown with hysteresis.
After the removal of a fault condition, the IC is
automatically restarted.
February 2016
DocID026980 Rev 4
1/44
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