VIPER38 VIPerPlus family: peak power high-voltage converter Datasheet - production data Output overvoltage protection with tight tolerance and digital noise filter Soft-start reduces the stress during startup and increases IC lifetime Automatic restart after a fault condition Thermal shutdown increases system reliability and IC lifetime Applications Auxiliary power supply for consumer and home Figure 1. Typical application equipment Power supply for energy meters and data concentrators 5 ,1 Adapters &217 ,s (37 9,3HU 9 Description )% *1 The device is a high-voltage converter that smartly integrates an 800 V rugged power MOSFET with PWM current-mode control. The power MOSFET allows a very high input V to be ac applied, just limited from its breakdown voltage. Features This IC is capable of meeting more stringent energy-saving standards as it has very low 800 V avalanche-rugged power MOSFET consumption and operates in burst mode under allowing ultra wide range input V to be ac light load. achieved The device features an adjustable extra power Embedded HV start-up and sense FET timer (EPT) that enables the IC to sustain PWM current-mode controller overload conditions for a few seconds. nd OCP with selectable threshold (I ) and 2 Dlim The integrated HV startup, sense FET and OCP with higher value (I ) to protect the IC DMAX oscillator with jitter allow the advantage of using from transformer saturation or short-circuit of minimal components in the application. the secondary diode The device features high-level protections like 30 mW no-load consumption at 230 V ac dual-level OCP, output overvoltage, short-circuit, Two operating frequencies: and thermal shutdown with hysteresis. After the 60 kHz (L type) or 115 kHz (H type) removal of a fault condition, the IC is automatically restarted. Jittered frequency reduces the EMI Extra power timer (EPT) blanks the overload current for few seconds November 2019 DS10100 Rev 3 1/30 This is information on a product in full production. www.st.comContents VIPER38 Contents 1 Block diagram 5 2 Typical power . 5 3 Pin settings 6 4 Electrical characteristics . 7 5 Typical electrical characteristics 11 6 Typical circuit . 13 7 Operation . 14 7.1 Power section and gate driver . 14 7.2 High-voltage startup generator . 14 7.3 Power-up and soft startup 14 7.4 Power-down . 17 7.5 Auto-restart 17 7.6 Oscillator . 17 7.7 Current mode conversion with adjustable current limit setpoint 18 7.8 Overvoltage protection (OVP) . 18 7.9 About CONT pin 19 7.10 Feedback and overload protection (OLP) 20 7.11 Burst-mode operation at no load or very light load 22 7.12 Extra power timer (EPT) 22 7.13 2nd level overcurrent protection and hiccup mode 23 8 Package information 24 8.1 SDIP10 package information 24 8.2 SO16 Narrow package information . 26 9 Order code . 28 10 Revision history . 29 2/30 DS10100 Rev 3