SL486MP – GEC PLESSEY

The SL486MP, manufactured by GEC Plessey, is a monolithic integrated circuit designed for pulse-width modulation (PWM) control applications. Fabricated using a proprietary bipolar process, this device operates as a high-performance, fixed-frequency, voltage-mode PWM controller. The “PLESSEY/96” designation indicates a date code or manufacturing lot identifier of 1996, suggesting this is a legacy component. The absence of RoHS compliance, coupled with its age, necessitates careful consideration for modern applications due to potential lead content. The surface mount package facilitates automated assembly processes, but requires appropriate reflow soldering profiles to ensure reliable electrical connections. Key features include an internal oscillator, error amplifier, PWM comparator, and output driver stage, enabling efficient and precise control of DC-DC converters and other power management circuits.