Next gen SEPIC/boost controller targets automotive applications

With a fixed switching frequency of 2MHz, the company claims the device almost doubles the frequency performance offered by most competing devices on the market. It covers an input voltage range of 3.2 to 40V and uses peak current mode control with internal slope compensation. Additional features include a built-in regulator that supplies charge to the gate driver and a 1.2V ±2% reference voltage. Protection features include internally set soft start, under voltage lockout, cycle by cycle current limiting and thermal shutdown. The AEC-qualified NCV898031 is designed to cope with a 45V load dump and has an operational temperature range of -40 to 150°C. According to ON, the device's higher frequency operation allows it to be used with smaller and lower cost inductors and output capacitors, thereby lowering the overall cost and taking up less pcb space. It is optimised for use in automotive applications such as instrumentation clusters and infotainment systems. "The enhanced frequency performance exhibited by the NCV898031 will be of great benefit to design engineers as they look to curb costs and better utilise available space, allowing smaller, less expensive passive components to be specified," said Jim Alvernaz, ON Semiconductor director of automotive products. "In addition, its low quiescent current level will help to meet the demanding ignition-off requirements now being expected within the automotive industry."