SEPIC/boost controller for automotive applications

28 November 2012 Power Electronics / Power Management

ON Semiconductor has released the NCV898031, an adjustable output non-synchronous, single-ended primary-inductor converter (SEPIC)/boost controller targeted for use in automotive applications.

With a fixed switching frequency of 2 MHz and covering a wide input voltage range of 3,2 to 40 V, the controller uses peak current mode control with internal slope compensation. It has a built-in regulator that supplies charge to the gate driver, plus a 1,2 V ±2% reference voltage.

Protection features include internally-set soft-start, under-voltage lockout, cycle-by-cycle current limiting and thermal shutdown. The AEC-qualified IC can cope with a 45 V load dump and has an operational temperature range of -40°C to

150°C. In addition, its low sleep-mode current of typically 10 μA helps to keep the total ignition off quiescent current budget to a minimum.

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