SA56202 Datasheet, PDF (9/24 Pages) NXP Semiconductors – One-chip motor driver

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 R_LIM
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 I_LIM.
This I_LIM can be programmed by means of R_LIM. In order to calculate the required R_LIM
first a typical maximum motor current I_MAX needs to be determined:
I _MAX = -_R---_m----_o---^V_t-_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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