HIGH FREQUENCY LITZ WIRE RESONANT INDUCTOR

PH9499 SERIES for Quasi Resonant Converters

PH9499 is the first high frequency inductor series of PULSE specifically designed for Quasi Resonant Converters. PH9499.xxxCNL is a 0.95uH–1.25uH/3.5Arms series of inductors optimized for the 800kHz – 1.2MHz frequency of operation, typical of this topology. Litz wire is used to limit the ratio of AC to DC resistance to 1.25 at 1MHz, so that the converter maximizes the benefit of its low (22mOhms MAX) DC resistance.

PH9499.xxxCNL was primarily designed for power modules converting directly from 48 V to silicon core voltages. Through its compact size (11.2×9.75×7.6mm MAX) and its 1.1mm stand-off design feature that allows components to be mounted beneath the inductor, a power density of over 240W/in³ can be achieved in the resultant power module design. Additionally, an industry leading 6% inductance tolerance is achieved to maximize the benefits of the resonant topology. This tight tolerance, which arises from the selected number of winding turns, results in a high saturation current (>18A) so a high overcurrent can be supported for a short duration without compromising performance.

Features