BA6950FS データシートの表示（PDF） - ROHM Semiconductor

部品番号

コンポーネント説明

メーカー

BA6950FS

Reversible Motor Drivers for Brush Motors

ROHM Semiconductor 

BA6950FS, BA6951FS

Technical Note

13) 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 these P layers with the N layers of other elements, creating a

parasitic diode or transistor. For example, the relation between each potential is as follows:

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, as well as operating malfunctions and physical damage. Therefore, do not use methods by

which parasitic diodes operate, such as applying a voltage lower than the GND (P substrate) voltage to an input pin.

Pin A

N P+ N

Parasitic element

Resistor

Transistor (NPN)

Pin A

Pin B C B

E

Pin B

P

P+ N

P substrate

GND

Parasitic

element

N P+

N

P

P+ N

P substrate

Parasitic element

GND

GND

Appendix: Example of monolithic IC structure

B

C

E

Parasitic

GND element

Other adjacent elements

www.rohm.com

© 2011 ROHM Co., Ltd. All rights reserved.

9/10

2011.05 - Rev.C

Share Link: