TEA2018A Datasheet | STMicroelectronics

DESCRIPTION The TEA2018A is an 8-pin DIP low-cost integrated circuit designed for the control of switch mode power supplies. Due to its current mode regulation, the TEA2018A facilitates design of power supplies with following features : High stability regulation loop Automatic input voltage feed-forward in discontinuous mode fly-back Automatic pulse-by-pulse current limitation Typical applications : Video Display Units, TV sets, typewriters, microputers and industrialapplications Where synchronization is required, use the TEA2019. For more details, see application note AN406/0591 PIN CONNECTIONS DIP8 (Plastic Package) ORDER CODE : TEA2018A OSCILLATOR GROUND COLLECTOR CURRENT SENSING NEGATIVE SUPPLY VOLTAGE 1 2 3 4 8 7 6 5 ERROR AMPLIFIER NON-INVERTING INPUT DEMAGNETIZATION SENSING POSITIVE SUPPLY VOLTAGE 2018A-01.EPS OUTPUT May 1993 1/7 BLOCK DIAGRAM VCC 6 IS 7 DEMAGNETIZATION SENSING V CC INTERNAL BIAS MONITORING V REF 2.4V 0.1V VCC ”Good” Undervoltage Rt Ct 1 OSCILLATOR & FLIP-FLOP Ic RECOPY 5 OUTPUT DELAY 500ns 1 MAXIMUM DUTY CYCLE 70% & 1 PARATOR 8 G ≅ 50 2.4V -1V VOLTAGE LIMITATION 2018A-02.EPS THERMAL SHUTDOWN 3 I SENSE 2 GROUND 4 V CC ABSOLUTE MAXIMUM RATINGS Symbol VCC+ VCCIO(peak) II Tj Toper Tstg Parameter Positive Supply Voltage Negative Supply Voltage Peak Output Current (duty cycle < 5%) Input Current (Pin 3) Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Value 15 -5 ±1 ±5 +150 -20, +70 -40, +150 Unit V V A m A o C o C o C Symbol Rth (j-a) Parameter Junction-ambient Thermal Resistance Value 80 Unit...