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參數資料
| 型號： | SA56202 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | One-chip motor driver |
| 中文描述： | 單芯片電機驅動器 |
| 文件頁數： | 7/24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
7 of 24
Philips Semiconductors
SA56202
One-chip motor driver
driver do not use this recuperated current, than the supply voltage can possibly rise to
unacceptable values. In that case it is recommended to lower the spindle current during
brake by means of the VINSPN setting.
Upon detection of reverse detection all U, V and W driver outputs are connected to
V
DD(SPN)
. This short brake prevents the motor of spinning backwards.
7.2 Internal regeneration of back-EMF spindle motor
The spindle motor driver uses the information from the Hall sensors to internally
regenerate the back-EMF of the motor. See
Figure 4
.
Rotational speed
ω
is derived from the Hall event frequency. Multiplying
ω
with the k-factor
of the motor gives the back-EMF voltage V
EMF
. This V
EMF
is added to the current-limit
scaled spindle input voltage V
VINSPN
. This sum V
MOT
steers the PWM outputs U, V and W.
The result is that the input voltage V
VINSPN
sets the current through the motor. This
explains how the SA56202 spindle motor driver exhibits a current control transfer function
without using external sense resistors.
The simplified motor schematic in
Figure 5
shows the series resistance and back-EMF
voltage of the motor.
Fig 4.
Regeneration of back-EMF voltage spindle motor.
Fig 5.
Simplified spindle motor schematic.
001aaa438
PWM
SPEED
U
V
W
Hall U
Hall V
Hall W
spindle
motor
V
MOT
= V
RI
+ V
EMF
V
RI
= R
m
×
I
m
V
EMF
=
ω ×
k
ω
DIGITAL DOMAIN
VINSPN
torque
control
signal
R
LIM
maximum
motor
current
R
EMF
motor
k-factor
ANALOG DOMAIN
A
D
A
D
A
D
001aaa450
V
M1
V
M2
V
RM
V
RM
V
EMF
2
V
EMF
2
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SA56202TW | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip motor driver |
| SA56-21 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:14MM SINGLE DIGIT NUMERIC DISPLAYS |
| SA56-21CGKWA | 制造商:Kingbright Corporation 功能描述:DISPLAY 570NM GRN 1DIG 0.56 TH 制造商:Kingbright Corporation 功能描述:LED Displays & Accessories .56" SINGLE DIGIT GRN LED DISPLAY 制造商:Kingbright Corporation 功能描述:DP |
| SA5621EWA | 制造商:KINGBRIGHT 功能描述:* |
| SA56-21EWA | 功能描述:LED 顯示器和配件 Single Red 625nm Common Anode RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數位數量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
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