M81019FP Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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M81019FP

1200V HIGH VOLTAGE HALF BRIDGE DRIVER

MITSUBISHI ELECTRIC  

MITSUBISHI SEMICONDUCTORS <HVIC>

M81019FP

1200V HIGH VOLTAGE HALF BRIDGE DRIVER

6. HIGH SIDE VBS SUPPLY UNDER VOLTAGE LOCKOUT SEQUENCE

When VBS supply voltage drops below the VBS supply UV trip voltage and the duration in this status exceeds the VBS

supply UV filter time, the output of the high side is locked. As soon as the VBS supply voltage rises above the VBS supply UV

reset voltage, the output will respond to the following active HIN signal.

VBSuvr

VBS

VBSuvt

VBSuvr

VBS supply UV

hysteresis voltage

VBS supply UV filter time

HIN

LIN

HOUT

LOUT

Note1: Delay times between input and output signals are not shown in the figure above.

7. POWER START-UP SEQUENCE

At power supply start-up the following sequence is recommended when bootstrap supply topology is used.

(1). Apply VCC.

(2). Make sure that FO is at high level.

(3). Set LIN to high level and HIN to low

VCC

level so that bootstrap capacitor could

be charged.

(4). Set LIN to low level.

FO

Note: If two power supply are used for supplying

Note: VCC and VBS individually, it is recommended

Note: to set VCC first and then set VBS.

HIN

LIN

LOUT

Aug. 2009

8

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