HA13556AF 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HA13556AF

Combo (Spindle & VCM) Driver

Hitachi -> Renesas Electronics 

Commutation Timing

Commutation for starting up

COMM

PHASE

1/fCOMM

Delay

HA13566AF

Pulsewidth ≥ 10µs

+

IU 0

–

+

IV 0

–

+

IW 0

–

Synchronous

(≅0.2s to 0.3s)

driving by B-EMF sensing

Note: 1. The frequency of COMM signal fCOMM can be designed as follows.

fCOMM (max) = 2.5

P · KT · IO (Hz)

J

(for begin of synchronous driving)

(1)

fCOMM (min) = 0.5

P · KT · IO (Hz)

J

(for end of synchronous driving)

(2)

Where,

P : Pole number of spindle motor (Hz)

KT : Torque constant (kg · cm/A)

IO : Start up current (A)

J : Moment of inertia (kg · cm · S2)

7

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