National Semiconductor’s high-voltage, monolithic two-switch forward DC/DC regulator for power supply designs in telecommunication, automotive and industrial applications features an ultra-wide input voltage range from 4.25 to 75V, and maximum switching frequency to 750kHz.
The LM5015 high-voltage switch-mode regulator features all of the functions necessary to implement efficient two-switch forward and two-switch flyback power converters with a minimum of external components. The easy-to-use regulator integrates high-side and low-side 75V N-Channel MOSFETs with a minimum 1A peak current limit. The voltage across the MOSFETs employed in the two-switch topology is clamped to the input voltage, allowing the input voltage range to approach the rating of the MOSFETs. The regulator control method is based on current-mode control, providing inherent ease-of-loop compensation and line feed-forward for superior rejection of input transients.
The operating frequency of the LM5015 is set with a single resistor and is programmable up to 750kHz. The oscillator can also be synchronized to an external clock. Additional protection features include cycle-by-cycle current limiting, thermal shutdown, under-voltage lockout and remote shutdown capability.
National Semiconductor, www.national.com
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National Semiconductor’s switch-mode regulator features ultra-wide input voltage range from 4.25 to 75V.
