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BD8312HFN Datasheet(PDF) 3 Page - Rohm |
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BD8312HFN Datasheet(HTML) 3 Page - Rohm |
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3 / 15 page  BD8312HFN Technical Note 3/14 www.rohm.com 2009.04- Rev.B © 2009 ROHM Co., Ltd. All rights reserved. Description of Pins Block Diagram Pin No. Pin Name Function 1 GND Ground terminal 2 VCC Control part power input terminal 3 VREG 5 V output terminal of regulator for internal circuit 4 PGND Power transistor ground terminal 5 Lx Coil connecting terminal 6 PVCC DC/DC converter input terminal 7 STB ON/OFF terminal 8 INV Error AMP input terminal VCC INV VREG PGND GND STB PVCC Lx Fig.1 Terminal layout STB VREF ERROR_AMP INV SCP OSC×4000 ｃount FB H STOP OSC 1.5MHz VREG STBY_IO VCC PVCC PGND LX PWM CONTROL TIMMING CONTROL PRE DRIVER PRE DRIVER Reference UVLO VREF 5V REG 300mΩ 450mΩ VREG OSC×8000 ｃount Soft Start GND Step down ON/OFF Fig.2 Block diagram |
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