HA13614FH データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA13614FH

Combo (Spindle & VCM) Driver

Hitachi -> Renesas Electronics 

Start-up of the Spindle motor

• Not using external commutation mode

SPNENAB

EXTCOM

Low

COMM

PHASE

IU

0

HA13614FH

IV

0

IW

0

Synchronous driving*

B-EMF sensing driving

• Using external commutation mode

SPNENAB

EXTCOM

COMM

PHASE

IU

0

IV

0

IW

0

Synchronous driving*

B-EMF sensing driving

Note: “Synchronous driving” is defined as the period after changing SPNENAB = L to H until

the first positive edge of the PHASE signal.

Figure 8 Start-up of the Spindle Motor

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