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參數資料
| 型號： | AMC8500 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TWO PHASE VARIABLE SPEED FAN MOTOR CONTROLLER |
| 中文描述： | 兩相流變速風扇電機控制器 |
| 文件頁數： | 19/27頁 |
| 文件大小： | 648K |
| 代理商： | AMC8500 |
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P
P
Preliminary Specification
Andigilog, Inc. 2006
www.andigilog.com
August 2006 - 70A04018
aMC8500
Application Requirements
Closest Standard 1.0% Resistor Values
- 19 -
Gain
Offset
Min Speed
T
Speed
PWM
T
Speed
PWM
Minimum
Speed
Setting
R1
R2
R3
R4
R5
R6
°C
%on
°C
%on
%on
30
35
40
100
35
13700
16500
1400
5360
1070
1130
30
67
38
100
35
10500
76800
1370
6810
1070
1130
35
30
50
100
0
1070
8870
232
845
-
-
37
30
40
100
30
1070
48700
1330
4120
1070
1270
40
30
50
100
30
13000
169000
2320
7320
953
1130
This application circuit uses a Simistotr solid state silicon temperature sensor that provides a precision signal of 10 mV/°C with an
offset of 500 mV at 0°C. The Op Amp in conjunction with the Reference is used to gain-up and offset the signal before applying it to the
speed control input. The above table shows five application requirements that are similar to those in Figure 33 with the calculated
resistor values. The Simistor sensor allows a reduced component count when compared to the equivalent thermistor circuit. In each
example, the required PWM %on or motor speed is defined for a minimum and maximum sensor temperature, and for a minimum speed
setting. In the third application, the minimum speed set input is not required and the comparator must be disabled by connecting Pin 6 to
Pin 14. Note that the total Reference load current must exceed 2.0 mA in order to disable the automatic power down feature.
Figure 35- Simistor Sensing Variable Speed Temperature Regulator
2
10 nF
13
7
6
Fault Timer
Power Down
Kick Start
Reference
Hall Amplifier
Non-Overlap
Commutation
H
Motor
Drives
12 V
Current Limit
Comp
Op Amp
Oscillator
R
Min Speed
Comp
PWM Comp
Digital
Detector
Thermal
Shutdown
Under Voltage
Lockout
Current
Limit
Latch
R
Q
S
16
1
12
15
14
10
9
8
5
11
3
4
PWM
Logic
10
μ
A
R2
R1
R4
R3
R5
R6
N
S
M
S
N
H
aSM121
H
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