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| Alarm System - QBAR®
Switch in Series with Load A QBAR® switch will reliably activate an alarm (a warning display, a cooling fan, a not-ready indicator, or any other load that should be driven during failure) over a wider range of fault conditions than other switch types. The QBAR® switch will turn the alarm on when:
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| Temperature Controlled
Fan The temperature controlled fan operates (to prevent overheating) when:
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| High Current and Voltage Non-Inverting
Driver Non-inverting driver features unusually low rail-to-rail current loss in HI state. |
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| Electronic Circuit Breakers Offer Wide
Adjustment Range At low currents, the QBAR® switch stays in its normally-closed state, It snaps to open, breaking the circuit when I load is too high for too long. Specifically when the voltage across the breaker (VBR) applies sufficient voltage via Rin for long enough to charge Cdelay to the QBAR® switch's input threshold voltage, the QBAR® switch snaps open. These circuit breakers can be reset by cycling the power supply or shorting Cdelay.
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| Slow-Start
Circuit Frequently, full system operations must be inhibited until all supplies are up and other components are functioning properly. Slow-start circuits can both prevent damage to fragile components and help avoid a system's hanging-up in an unsatisfactory state. |
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| Motor
Dynamic Braking QBAR® switches provide motor dynamic braking when power is lost. On power disconnect, and without the QBAR® switches, a FET H-Switch will allow the motor to continue spinning freely. |
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| Off-Line
Not-Ready Indicator QB312 series high voltage QBAR® switches can provide indicators and other functions for off-line applications in the US and Europe. Not-ready indicator is ON while logic or other power supply ramps up. |
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| Battery
Systems Unlike all other non-inverting switch ICs, QBAR® switches require no connecting wire to the hot battery lead, thus reducing the number of "hot" lead connections and the consequent hazard from shorts to ground. |
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P.O. Box 617 Sudbury, MA 01776 |
Phone: (978)443-5720 |