VIPer35 Quasi-resonant high performance off line high voltage converter Datasheet - production data Less than 30 mW 230 V in no-load AC condition Brown-out set through resistor divider Short-circuit protection (auto-restart) Hysteretic thermal shutdown 62 1 6 3, Applications Figure 1. Basic application schematic Auxiliary power supply Adapter/charger for PDA, camcorders, & W J D H R&X W W J D H shavers, tablet, video games, STB Supplies for industrial systems, metering, 1 , 5 appliances 9,3(5 =& 9 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 9 *,3* 5 saving standards as it has very low consumption and operates in burst mode under light load Features conditions. 800 V avalanche-rugged power MOSFET The device features the brown-out enabling the allowing ultra wide range input V to be IC to set the switch-off and switch-on threshold AC achieved independently one of each other. The quasi- resonant operation reduces the level of EMI and Embedded HV start-up and senseFET the quantity of components in the application. Built-in soft-start The quasi-resonant operation reduces the Quasi-resonant current mode PWM controller switching losses and improves power conversion with drain current limit (I ) Dlim efficiency. The device features high level Multifunction ZCD pin: protections such as: output overvoltage, short- Zero-current detection circuit and thermal shutdown with hysteresis. OCP threshold (I ) setup After the removal of a fault condition, the IC is Dlim automatically restarted. Output OVP (auto-restart) Feed-forward compensation Support isolated flyback topology with opto- coupler Frequency limit: 136 kHz (L type), 225 kHz (H type) February 2016 DocID026980 Rev 4 1/44 www.st.com )% *1 %5 OW YR SX OW YR LQSXContents VIPer35 Contents 1 Block diagram 6 2 Typical output power 6 3 Pin settings 7 4 Electrical ratings 8 5 Typical electrical characteristics 13 6 Typical circuits 17 7 Efficiency performance for a typical flyback converter 18 8 Operation description . 19 8.1 Power section and gate driver . 19 8.2 High voltage start-up generator 19 8.3 Power-up and soft-start 19 8.4 Power-down description 23 8.5 Auto-restart description 23 8.6 Quasi-resonant operation (QR) 23 8.7 Frequency foldback function and valley-skipping mode 25 8.8 Blanking time 26 8.9 Starter 27 8.10 Current limit set-point and feed-forward option 27 8.11 Overvoltage protection (OVP) . 29 8.12 ZCD pin summary 31 8.13 Feedback and overload protection (OLP) 32 8.14 Burst mode operation at no-load or very light load 35 8.15 Brown-out . 36 2/44 DocID026980 Rev 4