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TBU-CA050-300-WH Datasheet(PDF) 3 Page - Bourns Electronic Solutions |
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TBU-CA050-300-WH Datasheet(HTML) 3 Page - Bourns Electronic Solutions |
3 / 6 page 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -75 -50 -25 0255075 100 125 150 Junction Temperature (°C) 2.2 1.6 1.8 2.0 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -75 -50 -25 0255075 100 125 150 Junction Temperature (°C) TBU-CA Series - TBU® High-Speed Protectors Reference Application The TBU® devices are general use protectors used in a wide variety of applications. The maximum voltage rating of the TBU® device should never be exceeded. Where necessary, an OVP should be employed to limit the maximum voltage. A cost- effective protection solution combines Bourns® TBU® protection devices with a pair of Bourns® MOVs. For bandwidth sensitive applications, a Bourns® GDT may be substituted for the MOV. The TBU® device, constructed using MOSFET semiconductor technology, placed in the system circuit will monitor the current with the MOSFET detection circuit triggering to provide an effective barrier behind which sensitive electronics are not exposed to large voltages or currents during surge events. The TBU® device operates in approximately 1 μs - once line current exceeds the TBU® device’s trigger current Itrigger. When operat- ed, the TBU® device will limit the current to less than the Itrigger value within the tblock duration. If voltage above Vreset is contin- uously sustained, the TBU® device will subsequently reduce the current to a quiescent current level within a period of time that is dependent upon the applied voltage. After the surge, the TBU® device resets when the voltage across the TBU® device falls to the Vreset level. The TBU® device will automatically reset on lines which have no DC bias or have DC bias below Vreset (such as unpowered signal lines). If the line has a normal DC bias above Vreset, the voltage across the TBU® device may not fall below Vreset after the surge. In such cases, special care needs to be taken to ensure that the TBU® device will reset, with software monitoring as one method used to accomplish this. Bourns application engineers can provide further assistance. Basic TBU Operation Performance Graphs Typical V-I Characteristics (TBU-CA050-300-WH) Typical Trigger Current vs. Temperature Equip. OVP OVP Line Line TBU® Device TBU® Device Line In / Line Out Line Out / Line In Line Out / Line In Line In / Line Out Typical Resistance vs. Temperature Power Derating Curve CURRENT (100 mA/div) VOLTAGE (5 V/div) ITRIP VRESET No Additional PCB Cu 0.5 sq. in. Additional PCB Cu Junction Temperature (°C) 20 3.0 2.5 2.0 1.5 1.0 0.5 0.0 40 60 80 100 120 140 Specificationsaresubjecttochangewithoutnotice. Thedevicecharacteristicsandparametersinthisdatasheetcananddovaryindifferentapplicationsandactualdeviceperformancemayvaryovertime. Usersshouldverifyactualdeviceperformanceintheirspecificapplications. 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -75 -50 -25 0255075 100 125 150 Junction Temperature (°C) 2.2 1.6 1.8 2.0 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -75 -50 -25 0255075 100 125 150 Junction Temperature (°C) |
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