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AP431AG Datasheet(PDF) 4 Page - Advanced Power Electronics Corp. |
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AP431AG Datasheet(HTML) 4 Page - Advanced Power Electronics Corp. |
4 / 10 page www.a-power.com.tw 4 Advanced Power Electronics Corp. AP431A Note 3. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over the full temperature range. The average temperature coefficient of the reference input voltage αVREF is defined as: 1 2 6 REF DEV REF T T 10 ) C) (25 V V ( V − ⋅ ° = α ……………………..……………….. ( ) C ppm ° Where: T2 – T1 = full temperature change. α VREF can be positive or negative depending on whether the slope is positive or negative. Note 4. The dynamic output impedance, RZ, is defined as: KA KA KA I V Z ∆ ∆ = When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output impedance of the overall circuit, is defined as: ) R2 R1 (1 Z i v Z KA ' KA + ∆ ∆ = ≈ Test Circuits Input VREF V KA I KA Fig1. Test Circuit for V KA= VREF IN VREF R1 R2 IREF Note:VKA=VREF(1+R1/R2)+IREF× R1 I KA V KA Fig2. Test circuit for V KA>VREF IN V KA IZ(OFF) Fig3. Test Circuit for off-state Current |
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