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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)： | 10/19頁 |
| 文件大小： | 601K |
| 代理商： | AS8410 |
PWM DC Motor Regulator – Data Sheet
AS8410
Rev. 1.0, December 2000
page
10
of
19
4 Functional Description and Electrical
Parameters
The main functions of this PWM-Switch-Regulator are summarised in section 1.3.
The normal regulation loop is build by an analogue difference-integrator, both the input set
value at pin
IN
and the measured motor current (at pins
CMp
and
CMn
) are transformed to the
chip internal control signals. The difference signal is integrated on the capacitor connected to
the pin
Cint1
and the voltage
at this pin is controlling the PWM generator and closes so the
regulation loop. So the regulation time constant can be determined in width range by the exter-
nal capacitor at the pin
Cint1
.
The AS8410 can be used in two different modes controlled by the pin
MODE
:
Operating Mode 1 (OM1: V
MODE
= high):
-
The set value must be given at pin
IN
as the duty ration of a
low frequency digital
signal (f
IN
> 10 Hz).
-
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).
Operating Mode 2 (OM2: V
MODE
= low):
-
The set value must be given at pin
IN
as analogue voltage in the range
V
IN
= 0 … 5 V
-
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).
The adaptation of the AS8410 to the DC motor (nominal motor current and power FET) will be
realised by the value of the motor current measurement resistor R
meas
and by the slew rate con-
trolling currents into the pins
SRC1
and
SRC2
as described in section 3.4.1.
The detection of the different kinds of motor failures is realised by comparing the actual meas-
ured motor working point and the normal motor characteristic. Each motor failure is then treated
by the AS8410 with an adapted failure handling procedure described in section 3.4.2.
A failure report signal is generated and sent to the pin
IN
by pull down this pin.
Also the over temperature and the over / under voltage failure are treated by the AS8410 itself.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| AS8412 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:HIGH PERFORMANCE AUTOMOTIVE SONAR INTRUSION |
| AS8413 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:HIGH PERFORMANCE AUTOMOTIVE SONAR INTRUSION |
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| AS8426-A | 制造商:Coilcraft Inc 功能描述:DSL transformer, for Alcatel MTK-20140, not RoHS |
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