KA3843A Datasheet | Wing Shing

.. Current Mode PWM Controller KA3843A(AM) DESCRIPTION The KA3843AM are fixed frequency current mode PWM controller. They are specially designed for OFF- Line and DC to DC converter applications with a minimal external ponents. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature pensated reference, high gain error amplifier, current sensing parator, and a high current totempole output ideally suited for driving a power MOSFET. Protection circuitry includes built undervoltage lockout and current limiting. The corresponding thresholds for the The KA3843AM are 8.4V(on) and 7.6V (off) The KA3843AM can operate within 100% duty cycle. PIN CONNECTION (TOP VIEW) The KA3843AM has Start-Up Current 0.17m A (typ). Features - - - - Low Start-Up and Operating Current High Current Totem Pole Output Undervoltage Lockout With Hysteresis Operating Frequency Up To 500KHz BLOCK...