VIPER17 Energy saving VIPerPlus: HV switching regulator for flyback converter Datasheet - production data Limiting current with adjustable set point Adjustable and accurate overvoltage protection On-board soft-start Safe auto-restart after a fault condition Hysteresis thermal shutdown Applications Adapters for PDA, camcorders, shavers, cellular phones, videogames Auxiliary power supply for LCD/PDP TV, monitors, audio systems, computer, industrial systems, LED driver, No el-cap Figure 1: Typical topology LED driver SMPS for set-top boxes, DVD players and recorders, white goods Description The device is an off-line converter with an 800 V rugged power section, a PWM control, two levels of overcurrent protection, overvoltage and overload protections, hysteresis thermal protection, soft-start and safe auto-restart after any fault condition removal. The burst mode operation and the devices very low consumption meet the standby energy saving regulations. Advance frequency jittering reduces EMI filter Features cost. Brown-out function protects the switch 800 V avalanche rugged power section mode power supply when the rectified input PWM operation with frequency jittering for voltage level is below the normal minimum level low EMI specified for the system. The high voltage startup Operating frequency: circuit is embedded in the device. 60 kHz for L type 115 kHz for H type Standby power < 30 mW at 265 VAC Table 1: Device summary Order code Package Packing VIPER17LN / VIPER17HN DIP-7 Tube VIPER17HD / VIPER17LD Tube SO16 narrow VIPER17HDTR / VIPER17LDTR Tape and reel February 2017 DocID14419 Rev 11 1/31 www.st.com This is information on a product in full production. Contents VIPER17 Contents 1 Block diagram .................................................................................. 3 2 Typical power .................................................................................. 3 3 Pin settings ...................................................................................... 4 4 Electrical data .................................................................................. 5 4.1 Maximum ratings ............................................................................... 5 4.2 Thermal data ..................................................................................... 5 4.3 Electrical characteristics .................................................................... 6 5 Typical electrical characteristics.................................................. 10 6 Typical circuit ................................................................................ 13 7 Operation descriptions ................................................................. 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 operation .................................................................... 17 7.5 Auto restart operation ...................................................................... 17 7.6 Oscillator ......................................................................................... 17 7.7 Current mode conversion with adjustable current limit set point ..... 18 7.8 Overvoltage protection (OVP) ......................................................... 18 7.9 About CONT pin .............................................................................. 20 7.10 Feed-back and overload protection (OLP) ...................................... 20 7.11 Burst-mode operation at no load or very light load .......................... 23 7.12 Brown-out protection ....................................................................... 23 7.13 2nd level overcurrent protection and hiccup mode .......................... 25 8 Package information ..................................................................... 26 8.1 SO16 narrow package information .................................................. 26 8.2 DIP-7 package information .............................................................. 28 9 Revision history ............................................................................ 30 2/31 DocID14419 Rev 11