this is information on a product in full production. june 2014 docid15232 rev 7 1/30 VIPER16 fixed frequency viper? plus family datasheet - production data figure 1. typical application features ? 800 v avalanche rugged power section ? pwm operation with frequency jittering for low emi ? operating frequency: ? 60 khz for l type ? 115 khz for h type ? no need of auxiliary winding for low power application ? standby power < 30 mw at 230 v ac ? limiting current with adjustable set point ? on-board soft-start ? safe auto-restart after a fault condition ? hysteretic thermal shutdown application ? replacement of capacitive power supply ? auxiliary power supply for appliances, ? power metering ? led drivers description the device is an off-line converter with an 800 v avalanche ruggedness power section, a pwm controller, user defined overcurrent limit, protection against feedback network disconnection, hysteretic thermal protection, soft start up and safe auto restart after any fault condition. it is able to power itself directly from the rectified mains, eliminating the need for an auxiliary bias winding. advance frequency jittering reduces emi filter cost. burst mode operation and the devices very low consumption both help to meet the standard set by energy saving regulations. ' , 3 6 2 q d u u r z table 1. device summary order codes package packaging VIPER16ln dip-7 tube VIPER16hn VIPER16hd so16 narrow tube VIPER16hdtr tape and reel VIPER16ld tube VIPER16ldtr tape and reel www.st.com
contents VIPER16 2/30 docid15232 rev 7 contents 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 typical power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.1 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 typical circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 power section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8 high voltage current generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 9 oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 10 soft start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 11 adjustable current limit set point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 12 fb pin and comp pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 13 burst mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 14 automatic auto restart after overload or short-circuit . . . . . . . . . . . . . 20 15 open loop failure protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
docid15232 rev 7 3/30 VIPER16 contents 30 16 layout guidelines and design recommendations . . . . . . . . . . . . . . . . 23 17 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 18 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
block diagram VIPER16 4/30 docid15232 rev 7 1 block diagram 2 typical power figure 2. block diagram table 2. typical power part number 230 v ac 85-265 v ac adapter (1) 1. typical continuous power in non vent ilated enclosed adapter measured at 50 c ambient. open frame (2) 2. maximum practical continuous power in an open frame design at 50 c ambient, with adequate heat sinking. adapter (1) open frame (2) VIPER16 9 w 10 w 5 w 6 w
docid15232 rev 7 5/30 VIPER16 pin settings 30 3 pin settings figure 3. connection diagram (top view) note: the copper area for heat dissipation has to be designed under the drain pins. $ 0 y 1 & |