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8925 Datasheet(PDF) 3 Page - Allegro MicroSystems

Part # 8925
Description  3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH LINEAR CURRENT CONTROL AND POWER DMOS OUTPUTS
PDF  8 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

8925 Datasheet(HTML) 3 Page - Allegro MicroSystems

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8925
3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
WITH LINEAR CURRENT CONTROL
AND POWER DMOS OUTPUTS
Logic Output Voltage
VOUT(0)
IOUT = 3 mA
——
0.8
V
VOUT(1)
IOUT = -50 µA
2.0
——
V
Error Amplifier
Input Bias Current
IIB
VCM = 0.01 V
—
5.0
10
µA
Input Offset Voltage
VOS
VCM = 1.0 V
—
3.0
5.0
mV
Input Common-Mode Voltage Range
VIC
0.01
—
6.0
V
Error Voltage Gain
AVD
VS OUT / VS IN , VCM = 1.0 V
—
80
—
dB
Unity Gain Bandwidth
BW
—
1.0
—
MHz
Common-Mode Rejection Ratio
CMRR
—
80
—
dB
Power Supply Rejection Ratio
PSRR
—
50
—
dB
Miscellaneous
Current Sense Gain
AiCS
IOUT = -1.0 A
1/1k
1/1.2k
1/1.4k
—
Current-Sense Matching
—
IOUT = -1.0 A
—
±3.0
±5.0
%
Under-Voltage Trip Point
VCC
8.0
—
9.5
V
Hall Input Current
IIN(0)
VIN = 0 V
—
-500
-1000
µA
IIN(1)
VIN = 5.0 V
—
-250
-500
µA
Hall Input Threshold
VIN
—
3.8
—
V
Hall Input Pull-Up Resistance
RPU
—
25
—
k
Ω
NOTE: Negative current is defined as coming out of (sourcing) the specified device terminal.
ELECTRICAL CHARACTERISTICS CONTINUED
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
(FAULT, TACH)
X = Irrelevant
Z = High Impedance
Hall Sensor Inputs
Outputs
H1
H2
H3
ENABLE BRAKE FAULT
OUTA
OUTB
OUTC
High
Low
High
High
High
High
High
Low
Z
High
Low
Low
High
High
High
High
Z
Low
High
High
Low
High
High
High
Z
High
Low
Low
High
Low
High
High
High
Low
High
Z
Low
High
High
High
High
High
Low
Z
High
Low
Low
High
High
High
High
Z
Low
High
High
High
High
High
High
Low
Z
Z
Z
Low
Low
Low
High
High
Low
Z
Z
Z
X
X
X
Low
High
X
Z
Z
Z
XXXX
Low
X
Low
Low
Low
COMMUTATION TRUTH TABLE



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