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Controller speeds industrial, telecom, auto apps

Posted: 10 Nov 2010 ?? ?Print Version ?Bookmark and Share

Keywords:controller? voltage conversion? power?

Micrel Inc. expands its family of Hyper Speed Control adaptive on-time controllers. The MIC2176 is a 75VIN DC-to-DC controller capable of extremely low step down duty cycles (VIN = 75V; VOUT = 0.8V) and can drive up to 15A of load current. The Hyper Speed Control architecture cuts the required output capacitance up to 40 percent when compared to the traditional voltage conversion architectures.

"By pushing the maximum input voltage to 75V, applications that require single stage voltage step down conversion from wide input voltage can take advantage of our unique architecture," stated Doyle Slack, senior marketing director for analog power, Micrel. He added that the controller is suitable for "applications such as industrial equipment, networking infrastructure, automotive electronics and distributed power systems."

The MIC2176 is available in three frequency options of 100kHz/200kHz/300kHz and achieves greater than 94 percent efficiency, over a broad load range. The device is Any Capacitor stable, making designs very robust and offering the ability to scale down external capacitors. The MIC2176 Hyper Speed Control DC-to-DC controller operates over a wide input supply range of 4.5V to 75V and also offers cycle-by-cycle current limiting for MOSFET protection. While the UVLO circuitry ensures proper operation under power-sag conditions to prevent the MOSFETs from overheating, the soft start feature reduces the inrush current. The MIC2176 Hyper Speed Control controller is available in a 10-pin MSOP package with an operating junction temperature range from -40C to + 125C .

The MIC2176 is quoted at $1.35 each for orders of 1,000 units.

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