VIPER22AS

VIPer22ADIP VIPer22AS ® LOW POWER OFF LINE SMPS PRIMARY SWITCHER TYPICAL POWER CAPABILITY Mains type SO-8 DIP-8 European (195 - 265 Vac) 12 W 20 W US / Wide range (85 - 265 Vac) 7W 12 W SO-8 DIP-8 ORDER CODES n n n n PACKAGE FIXED 60 KHZ SWITCHING FREQUENCY SO-8 DIP-8 9V TO 38V WIDE RANGE VDD VOLTAGE CURRENT MODE CONTROL c u d AUXILIARY UNDERVOLTAGE LOCKOUT WITH HYSTERESIS SOURCE n OVERTEMPERATURE, OVERCURRENT AND OVERVOLTAGE PROTECTION WITH AUTORESTART e t le ) s ( ct u d o r P e bs INTERNAL SUPPLY DRAIN ON/OFF 60kHz OSCILLATOR REGULATOR t e l o o r P o s b O - DESCRIPTION The VIPer22A combines a dedicated current mode PWM controller with a high voltage Power BLOCK DIAGRAM ) s t( MOSFET on the same silicon chip. Typical applications cover off line power supplies for battery charger adapters, standby power supplies for TV or monitors, auxiliary supplies for motor control, etc. The internal control circuit offers the following benefits: – Large input voltage range on the VDD pin accommodates changes in auxiliary supply voltage. This feature is well adapted to battery charger adapter configurations. – Automatic burst mode in low load condition. – Overvoltage protection in hiccup mode. n HIGH VOLTAGE START UP CURRENT O TUBE T&R VIPer22AS VIPer22AS13TR VIPer22ADIP - OVERTEMP. DETECTOR R1 S FF PWM LATCH Q R2 R3 R4 _ VDD + BLANKING 8/14.5V + + 42V _ S R FF _ 0.23 V OVERVOLTAGE LATCH 230 Ω Q 1 kΩ FB SOURCE September 2002 1/15 VIPer22ADIP / VIPer22AS PIN FUNCTION Name Function VDD Power supply of the control circuits. Also provides a charging current during start up thanks to a high voltage current source connected to the drain. For this purpose, an hysteresis comparator monitors the VDD voltage and provides two thresholds: - VDDon: Voltage value (typically 14.5V) at which the device starts switching and turns off the start up current source. - VDDoff: Voltage value (typically 8V) at which the device stops switching and turns on the start up current source. SOURCE DRAIN FB Power MOSFET source and circuit ground reference. Power MOSFET drain. Also used by the internal high voltage current source during start up phase for charging the external VDD capacitor. Feedback input. The useful voltage range extends from 0V to 1V, and defines the peak drain MOSFET current. The current limitation, which corresponds to the maximum drain current, is obtained for a FB pin shorted to the SOURCE pin. CURRENT AND VOLTAGE CONVENTIONS I DD VDD I FB FB VDD VFB CONNECTION DIAGRAM SOURCE o r P e t e l o s b O 2/15 SOURCE 2 FB 3 VDD 4 du SO-8 DRAIN CONTROL VD e t le SOURCE VIPer22A ) s ( ct 1 c u d ID o r P o s b O - 8 DRAIN SOURCE 1 8 DRAIN 7 DRAIN SOURCE 2 7 DRAIN 6 DRAIN FB 3 6 DRAIN 5 DRAIN VDD 4 5 DRAIN DIP8 ) s t( VIPer22ADIP / VIPer22AS ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VDS(sw) Switching Drain Source Voltage (Tj=25 ... 125°C) (See note 1) -0.3 ... 730 V VDS(st) Start Up Drain Source Voltage (Tj=25 ... 125°C) (See note 2) -0.3 ... 400 V Internally limited A 0 ... 50 V 3 mA 200 1.5 V kV Internally limited °C ID Continuous Drain Current VDD Supply Voltage IFB Feedback Current VESD Electrostatic Discharge: Machine Model (R=0Ω; C=200pF) Charged Device Model Tj Junction Operating Temperature Tc Case Operating Temperature -40 to 150 °C Storage Temperature -55 to 150 °C Tstg Note: 1. This parameter applies when the start up current source is off. This is the case when the VDD voltage has reached VDDon and remains above VDDoff. 2. This parameter applies when the start up current source is on. This is the case when the VDD voltage has not yet reached VDDon or has fallen below V DDoff. c u d THERMAL DATA Symbol Parameter Rthj-case Thermal Resistance Junction-Pins for : SO-8 DIP-8 Rthj-amb Thermal Resistance Junction-Ambient for : SO-8 DIP-8 e t le o s b O - Max Value Unit 25 15 °C/W 55 45 °C/W o r P (See note 1) (See note 1) ) s t( Note: 1. When mounted on a standard single-sided FR4 board with 200 mm² of Cu (at least 35 µm thick) connected to all DRAIN pins. ELECTRICAL CHARACTERISTICS (Tj=25°C, VDD=18V, unless otherwise specified) POWER SECTION Symbol BVDSS IDSS Parameter Test Conditions Drain-Source Voltage ID=1mA; VFB=2V Off State Drain Current VDS=500V; VFB=2V; Tj=125°C o r P e c u d Min. Typ. Max. 730 Unit V 0.1 mA 17 31 Ω Static Drain-Source On State Resistance ID=0.4A ID=0.4A; Tj=100°C tf Fall Time ID=0.2A; VIN=300V (See fig.1) (See note 1) 100 ns tr Rise Time ID=0.4A; VIN=300V (See fig.1) (See note 1) 50 ns Drain Capacitance VDS=25V 40 pF RDSon t e l o bs Coss O (t s) 15 Note: 1. On clamped inductive load 3/15 VIPer22ADIP / VIPer22AS ELECTRICAL CHARACTERISTICS (Tj=25°C, VDD=18V, unless otherwise specified) SUPPLY SECTION Symbol Parameter Test Conditions Min. Typ. Max. IDDch Start Up Charging Current VDS=100V; VDD=0V ...VDDon (See fig. 2) IDDoff Start Up Charging Current in Thermal Shutdown VDD=5V; VDS=100V Tj > TSD - THYST IDD0 Operating Supply Current I =2mA FB Not Switching IDD1 Operating Supply Current I =0.5mA; I =50mA FB D Switching DRST Restart Duty Cycle VDDoff VDD Undervoltage Shutdown Threshold (See fig. 2 & 3) 7 8 9 VDDon VDD Start Up Threshold (See fig. 2 & 3) 13 14.5 16 (See fig. 2) 5.8 6.5 7.2 38 42 46 VDDhyst VDD Threshold Hysteresis VDDovp VDD Overvoltage Threshold -1 Unit mA 0 mA 3 5 mA (Note 1) 4.5 mA (See fig. 3) 16 % c u d V ) s t( V V V o r P Note: 1. These test conditions obtained with a resistive load are leading to the maximum conduction time of the device. e t le OSCILLATOR SECTION Symbol FOSC Parameter Test Conditions so Oscillator Frequency Total Variation VDD=VDDoff ... 35V; Tj=0 ... 100°C PWM COMPARATOR SECTION Symbol (s) Parameter b O - Test Conditions GID IFB to ID Current Gain IDlim Peak Current Limitation IFBsd IFB Shutdown Current RFB FB Pin Input Impedance ID=0mA td Current Sense Delay to Turn-Off ID=0.4A t c u od VFB=0V Min. Typ. Max. Unit 54 60 66 kHz Min. Typ. Max. Unit 0.84 A (See fig. 4) (See fig. 4) 560 0.56 (See fig. 4) 0.9 mA (See fig. 4) 1.2 kΩ 200 ns Blanking Time 500 ns Minimum Turn On Time 700 ns r P e t e l o tb tONmin s b O 0.7 OVERTEMPERATURE SECTION Symbol Parameter Test Conditions TSD Thermal Shutdown Temperature (See fig. 5) THYST Thermal Shutdown Hysteresis (See fig. 5) 4/15 Min. Typ. Max. Unit 140 170 °C 40 °C VIPer22ADIP / VIPer22AS Figure 1 : Rise and Fall Time ID C L D C