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BD6965NUX Datasheet(PDF) 9 Page - Rohm |
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BD6965NUX Datasheet(HTML) 9 Page - Rohm |
9 / 16 page Datasheet 9/12 BD6965NUX © 2012 ROHM Co., Ltd. All rights reserved. www.rohm.com TSZ02201-0H1H0B100130-1-2 6.Jul.2012 Rev.001 TSZ22111・15・001 ●Safety measure 1) Reverse connection protection diode Reverse connection of power results in IC destruction as shown in Fig.16. When reverse connection is possible, reverse connection protection diode must be added between power supply and Vcc. Fig.16 Flow of current when power is connected reversely 2) Measure against Vcc voltage rise by back electromotive force Back electromotive force (Back EMF) generates regenerative current to power supply. However, when reverse connection protection diode is conected, Vcc voltage rises because the diode prevents current flow to power supply. Fig.17 Vcc voltage rise by back electromotive force When the absolute maximum rated voltage may be exceeded due to voltage rise by back electromotive force, place (A) Capacitor or (B) Zener diode between Vcc and GND. If necessary, add both (C). Fig.18 Measure against Vcc voltage rise Vcc GND Vcc GND Vcc GND Internal circuit impedance high amperage small Circuit block Each pin In normal energization Large current flows Thermal destruction Each pin Circuit block Reverse power connection No destruction Each pin Circuit block After reverse connection destruction prevention Phase switching ON ON ON ON (A) Capacitor (B) Zener diode (C) Capacitor and zenner diode ON ON ON ON ON ON |
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