TEA2018A

电流模式开关电源控制电路 CURRENT MODE SWITCHING POWER SUPPLY CONTROL CIRCUIT

DESCRIPTION

The 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, microcomputersand industrial applications

. DIRECT DRIVE OF THE EXTERNAL SWITCHING TRANSISTOR

. POSITIVE AND NEGATIVE OUTPUT CURRENTS UP TO 0.5 A

. CURRENT LIMITATION

. TRANSFORMER DEMAGNETIZATION SENSING

. FULL OVERLOAD AND SHORT-CIRCUIT PROTECTION

. PROPORTIONAL BASE CURRENT DRIVING

. LOW STANDBY CURRENT BEFORE STARTING < 1.6 mA

. THERMAL PROTECTION