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参数资料
| 型号： | 8904 |
| 厂商： | Allegro MicroSystems, Inc. |
| 英文描述： | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
| 中文描述： | 3相无刷直流电动机控制器/驱动器，反电动势遥感 |
| 文件页数： | 5/18页 |
| 文件大小： | 744K |
| 代理商： | 8904 |
8904
3-PHASE BRUSHLESS DC
MOTOR CONTROLLER/DRIVER
www.allegromicro.com
5
Limits
Characteristic
C
WD
Current
Symbol
I
CWD
Test Conditions
Min.
-9.0
-18
-27
-36
0.22
2.25
20*
20
20
1.0
0.9
500
—
500
415
—
—
210
420
5.0
5.0
Typ.
-10
-20
-30
-40
0.25
2.5
—
—
—
1.2
1.0
600
250
600
500
300
125
250
500
10
20
Max.
-11
-22
-33
-44
0.28
2.75
—
—
—
1.4
1.1
700
—
700
585
—
—
290
580
13
37
Units
μA
μA
μA
μA
V
V
MHz
ns
ns
A
A
mA
mA
mA
mA
mA
mA
mA/V
mA/V
k
mV
Charging, D26 = 0, D27 = 0
Charging, D26 = 0, D27 =1
Charging, D26 = 1 D27 = 0
Charging, D26 = 1, D27 =1
C
WD
Threshold Voltage
V
TL
V
TH
f
OSC
ton
toff
Max. FLL Oscillator Frequency
Oscillator High Duration
Oscillator Low Duration
Maximum Output Current
I
OUT
(MAX)
D3 = 0, D4 = 0, D28 = 0
D3 = 0, D4 = 1, D28 = 0
D3 = 1, D4 = 0, D28 = 0
D3 = 1, D4 = 1, D28 = 0
D3 = 0, D4 = 0, D28 = 1
D3 = 0, D4 = 1, D28 = 1
D3 = 1, D4 = 0, D28 = 1
D3 = 1, D4 = 1, D28 = 1
D28 = 1
D28 = 0
Transconductance Gain
g
m
Centertap Resistors
Back-EMF Threshold with respect
to V
CTAP
at FCOM transition
R
CT
—
-5.0
-20
-37
mV
ELECTRICAL CHARACTERISTICS continued
Negative current is defined as coming out of (sourcing) the specified device terminal.
* Operation at an oscillator frequency greater than the specified minimum value is possible but not waranteed.
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