參數(shù)資料
型號: SA56202
廠商: NXP Semiconductors N.V.
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: One-chip motor driver
中文描述: 單芯片電機(jī)驅(qū)動器
文件頁數(shù): 9/24頁
文件大?。?/td> 117K
代理商: SA56202
9397 750 12772
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 19 July 2004
9 of 24
Philips Semiconductors
SA56202
One-chip motor driver
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:
V
R
motor
R
switches
+
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.
001aaa433
W
V
HALL U
U(V)
U(I)
V(V)
V(I)
W(V)
W(I)
HALL W
HALL V
U
I
MAX
-------------------------------------------
=
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