Uprated PWM controller offers space saving and cost benefits

November 01, 2012 // By Paul Buckley
Advanced Power Electronics Corp. (USA) has updated two of the company’s PWM controllers to provide customers with space saving and more cost effective devices without sacrificing performance and reliability.

The well-accepted APE3061 PWM controller is now available in a small 8-lead DFN package, reducing package size down from 5x6 mm (SO-8) to 3x3 mm, without any negative impacts on power handling capability. The new APE3061GN3-HF-3 component supports input voltages from 3 V up to 24 V and is designed to drive an external N-channel MOSFET.

The output voltage is dependent on the external N-MOSFET and is programmable using an internal reference voltage of 1.0 V and external resistors connected as a voltage divider. The controller benefits from built-in enable and thermal shutdown functions. Switching frequency is fixed, around 500 kHz, allowing for easy filtering and low noise. The size of the external components can be reduced as well. A soft-start time, preventing overshoot at start-up, can be programmed by an outside capacitor.

Using copper wire for internal wire bonding, the APE3061M-HF-3 PWM controller has been updated to the new APE3061AM-HF-3 version. This offers customers a more cost effective solution without impacting performance and reliability. The new, lower cost version uses the same SO-8 Pb-free package as existing APE3061M-HF-3 controllers, which will stay in production for customers wanting to avoid requalification costs. The new APE3061AM-HF-3 device supports input voltages from 3 V up to 24 V, with an oscillation frequency of 500 kHz and an enable/shutdown function. The pulse width varies in a range from 0 to 85%, according to the load current.

Visit Advanced Power Electronics at www.a-powerusa.com