VIPER28LN STMicroelectronics

VIPER28 Peak power high-voltage converter - VIPer Plus Datasheet - production data Thermal shutdown increases system reliability and IC lifetime Applications Auxiliary power supply for consumer and home D Q ,3 equipment Power supply for energy meters and data concentrators Figure 1. Typical application AC-DC adapters 5 1 , Description &217 ,s 7 (3 9 , 3 H U The device is a high-voltage converter that )% *1 smartly integrates an 800 V rugged power MOSFET with PWM current-mode control.This IC is capable of meeting more stringent energy- saving standards as it has very low consumption and operates in burst mode under light load. The device features an adjustable extra power timer Features (EPT) that enables the IC to sustain overload 800 V avalanche-rugged power MOSFET conditions for a few seconds. The integrated HV allowing achieving ultra wide-range input V startup, sense FET and oscillator with jitter allow ac the advantage of using minimal components in Embedded HV startup and sense FET the application. The device features high-level PWM current-mode controller protections like dual-level OCP, output nd OCP with selectable threshold (I ) and 2 overvoltage, short-circuit, and thermal shutdown Dlim OCP with higher value (I ) to protect the IC with hysteresis. After the removal of a fault DMAX from transformer saturation or short-circuit of condition, the IC is automatically restarted. the secondary diode 30 mW no-load consumption at 230 V ac Two operating frequencies: Table 1. Device summary 60 kHz (L type) or 115 kHz (H type) Order codes Package Packaging Jittered frequency reduces the EMI VIPER28LN / Extra power timer (EPT) blanks the overload DIP-7 VIPER28HN current for few seconds Tube VIPER28HD / Output overvoltage protection with tight VIPER28LD tolerance and digital noise filter SO16 narrow VIPER28HDTR / Soft-start reduces the stress during startup and Tape and reel VIPER28LDTR increases IC lifetime Automatic restart after a fault condition December 2014 DocID15028 Rev 6 1/31 This is information on a product in full production. www.st.com 9 62 UURZContents VIPER28 Contents 1 Block diagram 5 2 Typical power . 5 3 Pin settings 6 4 Electrical ratings 7 4.1 Electrical characteristics . 8 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 . 18 7.7 Current mode conversion with adjustable current limit setpoint 18 7.8 Overvoltage protection (OVP) . 18 7.9 About CONT pin 20 7.10 Feedback and overload protection (OLP) 20 7.11 Burst-mode operation at no load or very light load 23 7.12 Extra power timer (EPT) 24 7.13 2nd level overcurrent protection and hiccup mode 25 8 Package mechanical data 26 8.1 DIP-7 package information 26 8.2 SO16 Narrow package information . 28 9 Revision history . 30 2/31 DocID15028 Rev 6