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UC19431J Datasheet(PDF) 5 Page - Texas Instruments |
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UC19431J Datasheet(HTML) 5 Page - Texas Instruments |
5 / 8 page 5 UC19431 UC29431 UC39431 UC39431B Optocoupler Application The two amplifier circuit architecture employed in the UC39431 is most advantageous for the optocoupler ap- plication. The error amplifier provides a fixed open loop gain that is available to apply flexible loop compensation of either poles or zeroes. A fixed transconductance am- plifier provides a linear current source compared to the typical transistor’s exponential output characteristics. It also eliminates the traditional optocoupler’s CTR varia- tions with power supply and voltage, and the need to suffer the additional voltage drop of a series resistor. Magnetic Amplifier Controller Application The UC39431 makes an excellent controller for magnetic amplifier regulated outputs. Working from either a square wave drive or from a PWM signal controlled by another output, a saturable reactor provides highly efficient con- trol, requiring only a reset current which can be gener- ated from its own output. APPLICATION INFORMATION (cont.) Figure 3. Magnetic amplifier controller application. UDG-95090 |
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