HT45FM2C datasheet(105/171 Pages) HOLTEK

105 / 171 page

Rev. 1.10

104

�a� �0� �01�

Rev. 1.10

105

�a� �0� �01�

HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

Preliminar�

Mask Function

ThedeviceincludesaMotorControlMaskFunctionforincreasedcontrolflexibility.

Polarit�

PW�B

IR�101x�

Gate Driver

�AT

�AB

�BT

�BB

�CT

�CB

PW�O

Hall Sensor Decoder

1�x6

HAT/

HAB/

HBT/

HBB/

HCT/

HCB

�ask

GAT

GAB

GBT

GBB

GCT

GCB

�CF

DTS

PLC

Dead

Time

Insert

Staggered

circuit

AT�

AB�

BT�

BB�

CT�

CB�

AT0

AB0

BT0

BB0

CT0

CB0

AT1

AB1

BT1

BB1

CT1

CB1

�CD

BRKE

PROTECT

Mask Function Block Diagram

�otor

Power �OS

�oto HV

�AT

�BT

�CT

�AB

�BB

�CB

Mask Switching

Functional Description

TheinternalMASKcircuithasthreeoperationmodes,whichareknownastheNormalMode,Brake

ModeandMotorProtectMode.

• NormalMode

IntheNormalMode,themotorspeedcontrolmethodisdeterminedbythePWMS/MPWEbitsin

theMCFregister.

WhenPWMS=0,thebottomportPWMoutputselectstransistorpairbottomarmGAB/GBB/GCB.

WhenPWMS=1,thetopportPWMoutputselectstransistorpairtoparm,GAB/GBB/GCB.

WhenMPWE=0,thePWMoutputisdisabledandAT0/BT0/CT0/AB0/BB0/CB0areallon.

WhenMPWE=1,thePWMoutputisenabledandAT0/BT0/CT0/AB0/BB0/CB0canoutputa

variablePWMsignalforspeedcontrol.

WhenMPWMS=0,thePWMhasaComplementaryoutput

WhenMPWMS=1,thePWMhasaNon-complementaryoutput

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