SA56202 데이터 시트보기 (PDF) - Philips Electronics

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SA56202

One-chip motor driver

Philips Electronics 

Philips Semiconductors

HALL U

HALL W

HALL V

SA56202

One-chip motor driver

U(V)

U

U(I)

V(V)

V

V(I)

W(V)

W

W(I)

001aaa433

Fig 7. Phase relation between Hall input signals and spindle motor driver output

voltages U(V), V(V), W(V) and motor currents U(I), V(I), W(I) in forward rotation

mode.

7.4 Programming RLIM

If the supply is connected between the terminals of a non-running spindle motor, then

usually a current will flow that is too large. The motor current can be limited to a value ILIM.

This ILIM can be programmed by means of RLIM. In order to calculate the required RLIM

first a typical maximum motor current IMAX needs to be determined:

I MAX = -R---m----o---Vt-o---rD---+-D---(-R-S---Ps--w-N---i)-t--c--h---e--s

9397 750 12772

Preliminary data sheet

Rev. 01 — 19 July 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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