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BD1020HFV データシート(PDF) 6 Page - Rohm |
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BD1020HFV データシート(HTML) 6 Page - Rohm |
6 / 13 page BD1020HFV 6/9 TSZ02201-0M2M0F515090-1-2 © 2015 ROHM Co., Ltd. All rights reserved. 06.Nov.2015 Rev.001 www.rohm.com TSZ22111・15・001 Operational Notes – continued 11. Unused Input Pins Input pins of an IC are often connected to the gate of a MOS transistor. The gate has extremely high impedance and extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause unexpected operation of the IC. So unless otherwise specified, unused input pins should be connected to the power supply or ground line. 12. Regarding the Input Pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. P-N junctions are formed at the intersection of the P layers with the N layers of other elements, creating a parasitic diode or transistor. For example (refer to figure below): When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode. When GND > Pin B, the P-N junction operates as a parasitic transistor. Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Therefore, conditions that cause these diodes to operate, such as applying a voltage lower than the GND voltage to an input pin (and thus to the P substrate) should be avoided. Figure 6. Example of monolithic IC structure 13. Please connect it with the temperature measurement part (GND line usually) to make thermal conductivity with the mount board side the best though the PG pin (Pin No.2) is hindered and doesn't exist about OPEN even if it connects it with GND. N N P + P N N P + P Substrate GND N P + N N P + N P P Substrate GND GND Parasitic Elements Pin A Pin A Pin B Pin B B C E Parasitic Elements GND Parasitic Elements C B E Transistor (NPN) Resistor N Region close-by Parasitic Elements |
同様の部品番号 - BD1020HFV |
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同様の説明 - BD1020HFV |
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