CMJA5050 Ideal Applications Adjustable Current Limiting Diode Application Note
■In resistively biased circuits where a constant current is required, a great deal of power is wasted on resistors before current is passed to the load. Additionally, because of the resistors’ linear relationship between current and voltage, small variances in voltage can lead to undesirable variances in current. Central Semiconductor’s CMJA5050 adjustable current limiting diode (CLD) solves both dilemmas, providing constant current over a wide range of voltages, while consuming minimal power. Featuring the innovative DFN123F package, Central’s CMJA5050 also delivers unrivaled thermal efficiency while saving board space.
■Effectively, a CLD is a JFET in which gate and source are shorted by a small resistance, indicated in the figures below. The current of the CMJA5050 can be adjusted by varying the resistance placed in parallel, also shown below. Note that this resistor is external to the diode, unlike the RS within the device.
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Application note & Design Guide |
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Please see the document for details |
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DFN123F |
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English Chinese Chinese and English Japanese |
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2021/8/24 |
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1 MB |
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