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DC/DC controller tailored for harsh environments

Posted: 13 Jan 2010 ?? ?Print Version ?Bookmark and Share

Keywords:DC/DC controller? power supply? MOSFET?

MAX15046 DC/DC controller

From Maxim Integrated Products comes the MAX15046, a 40V-input DC/DC controller that integrates rugged protection features to ensure reliable operation in even the harshest operating environments. The device is well-suited for industrial power supplies, programmable logic controllers, computer numerical control systems, industrial computers and base stations.

The MAX15046's patent-pending current-limit architecture provides temperature-compensated, lossless current sensing across the low-side MOSFET. This architecture protects the DC/DC components from damage during output-overload or short-circuit conditions without requiring a current-sense resistor. The current-limit algorithm ensures monotonic turn-on into the prebiased bus, while adaptive internal digital soft-start reduces the input inrush current. The MAX15046 also includes an enable input with a precise reference and power-good output to simplify power sequencing. Internal thermal shutdown provides an additional layer of protection.

The MAX15046 utilizes externally programmable fixed-frequency architecture to alleviate the complexity of EMI filter design. The operating frequency is programmable from 100kHz to 1MHz. An internal, 1 percent accurate reference allows the output voltage to be programmed from 0.6V to 85 percent of Vin using an external resistor-divider. The device includes high-performance drivers to deliver up to 25A of output current.

The MAX15046 is packaged in a small, 16-pin QSOP; a high-power, exposed-pad version is available for rugged industrial environments. The device is fully specified over the -40C to +125C automotive temperature range. Prices start at $1.90 (1,000-up, FOB USA).

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