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Current Mode PWM Controller
KA3843A(AM)
DESCRIPTION
The KA3843AM are fixed frequency current mode PWM controller.
They are specially designed for OFFâLine and DC to DC converter applications with a minimal external components.
Internally implemented circuits include a trimmed
oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totempole output ideally suited for driving a power
MOSFET.
Protection circuitry includes built under
voltage lockout and current limiting.
The corresponding thresholds for the The KA3843AM are 8.
4V(on) and 7.
6V (off) The KA3843AM can operate withi...