The SPW3842S is a high performance fixed frequency current mode controller, specially designed for Off-Line and DC TO DC converter applications, offering the designer a cost-effective solution with min. external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control. A temperature compensated reference, high gain Error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features hysteresis, cycle-by-cycle current limiting, proprammable output deadtime, and latch for single pulse metering.
The SPW3842S is a high‑performance fixed‑frequency current‑mode controller designed for off‑line and DC‑to‑DC converter applications. It integrates a trimmed oscillator, temperature‑compensated reference, high‑gain error amplifier, current‑sensing comparator and a high‑current totem‑pole output suitable for driving MOSFETs.
Key features include low startup and operating current, automatic feed‑forward compensation, programmable dead‑time, under‑voltage lockout with hysteresis, and cycle‑by‑cycle current limiting. The datasheet lists absolute maximum ratings, detailed electrical characteristics, pin descriptions and application circuits to aid designers.
The startup threshold Vth is specified as 14.5 V to 17.5 V.