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參數(shù)資料
| 型號： | AS8410 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 運動控制電子 |
| 英文描述： | PWM DC Motor Regulator |
| 中文描述： | BRUSH DC MOTOR CONTROLLER, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 19/19頁 |
| 文件大?。?/td> | 601K |
| 代理商： | AS8410 |
PWM DC Motor Regulator – Data Sheet
AS8410
Rev. 1.0, December 2000
page
19
of
19
4.1.8.2
Over / Under Voltage Detection and Protection
The over / under voltage detection is used to prevent undefined system status.
Over or under voltage detected:
Handling:
a) switch off the motor
b) reuse the input set value, if the supply voltage returns in the
permissible range
Symbol
Vbat
V
bat_min
Parameter
min
5
6,2
typ
12
6,50
max
50
6,7
Unit
V
V
Note
Monitored supply voltage
Threshold voltage of the under voltage
detection
Threshold voltage of the over voltage
detection
falling
V
bat_max
32
33
34
V
rising
4.1.8.3
Over Temperature Detection and Protection
The over temperature detection is realised with an external temperature sensor (e.g. NTC re-
sistor) connected to the pin
TP
and the supply
VDD
. The threshold value of the temperature
detection is fixed at the voltage level V
refT
= 0.5 *VDD at the pin
TP
.
Symbol
VDD
V
refT
Parameter
min
4,7
typ
5,00
0.5*VDD
max
5,3
Unit
V
V
Note
5V supply at pin VDD
Threshold voltage of the temperature
detection
V
refT_hys
Hysteresis of the threshold voltage
1
Over temperature if V
TP
< 0.5*VDD
No over temperature if V
TP
> 0.5*VDD
Cross current of the external resistor divider must be > 1 mA
1
50
mV
Handling of the over temperature failure:
Operating Mode 1 (V
MODE
= high):
-
The Over Temperature reaction: 100 % duty ratio of the FET-driver output (perma-
nent switch on the motor) as long as the temperature is higher than the predefined
threshold value (typical automotive application, the heating source is not the electri-
cal system but the combustion engine to be cooled).
Operating Mode 2 (V
MODE
= low):
-
The Over Temperature reaction: The motor is regulated down to not cross the pre-
defined temperature threshold (like a thermostat if the heating source is the electrical
system itself).
Copyright
2000, Austria Mikro Systeme International AG, Schlo Premsttten, 8141 Unterpremsttten, Austria.
Tel.: +43-(0)3136-500-0, Fax: +43-(0)3136-52501, E-Mail: info@amsint.com
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any
means, without the prior permission in writing by the copyright holder. To the best of its knowledge, Austria Mikro Systeme Interna-
tional asserts that the information contained in this publication is accurate and correct.
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