a8904 Allegro MicroSystems, Inc., a8904 Datasheet - Page 5

• Manufacturer Part Number: a8904
• Description: 3-phase Brushless Dc Motor Controller/driver With Back Emf Sensing
• Manufacturer: Allegro MicroSystems, Inc.

ELECTRICAL CHARACTERISTICS at T
A8904
Characteristic
Logic Supply Voltage
Logic Supply Current
Undervoltage Threshold
Load Supply Voltage
Load Supply Current
Thermal Shutdown
Thermal Shutdown Hysteresis
Output Drivers
Output Leakage Current
Total Output ON Resistance
(source + sink + R
Output Sustaining Voltage
Clamp Diode Forward Voltage
Control Logic
Logic Input Voltage
Logic Input Current
BRAKE Threshold
BRAKE Hysteresis Current
BRAKE Current
DATA Output Voltage
C
C
Filter Current
Filter Threshold
C
(C
C
C
C
ST
ST
D
D
D
D
D1
Current
Current Matching
Threshold
Input Leakage
Current
Threshold
or C
D2
)
S
)
V
Symbol
V
V
V
UVLO
V
I
FILTERTH
V
r
V
V
V
V
I
FILTER
DS(on)
DS(sus)
I
I
I
V
I
I
OUT(0)
OUT(1)
I
V
ΔT
BRKL
I
I
IN(0)
IN(1)
CSTH
I
CDTH
CDIL
DSX
V
BRK
CST
CSTL
T
—
IN(0)
IN(1)
DD
BRK
CD
BB
DD
BB
J
F
J
3-Phase Brushless DC Motor Controller/Driver
Operating
Operating
Sleep mode
Decreasing V
Increasing V
Operating
Operating
Sleep mode
V
V
I
V
I
SECTOR DATA, RESET, CLK,
CHIP SELECT, OSC
V
V
V
Brake set, D2 = 1, I
I
I
Charging
Discharging, V
High
Low
Charging
Discharging
Leakage, V
Charging
Discharging
I
OUT
F
OUT
OUT
CD(DISCHRG)
BB
BB
BB
IN
IN
BRK
= 1.0 A
A
= 0 V
= 5.0 V
= 14 V, I
= 14 V, V
= 14 V, V
= 600 mA
= 500 μA
= -500 μA
= 750 mV
= +25°C, V
/I
FILTER
OUT
CD(CHRG)
DD
OUT
OUT
DD
Test Conditions
CST
= I
= 14 V, sleep mode
= 0 V
= 2.5 V
= 2.5 V
OUT
BRK
DD
(MAX), L = 3 mH
= 750 mV
= 5.0 V
with Back EMF Sensing
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Min.
2.25
0.85
1.57
2.25
-9.0
-9.0
4.5
4.0
2.0
1.5
3.5
9.0
-18
1.8
14
32
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Typ.
1.25
1.75
1.85
-2.0
250
165
200
500
-10
-10
-20
5.0
7.5
3.6
3.9
4.0
1.0
4.0
2.5
1.0
2.0
2.5
20
20
20
10
40
—
—
—
—
—
—
—
—
—
—
Limits
Continued next page …
Max.
±1.0
2.75
1.15
±5.0
2.13
2.75
500
300
-0.5
5.5
8.0
-15
1.4
1.5
0.8
2.0
1.5
-11
-11
-22
2.2
1.0
10
14
30
48
—
—
—
—
—
—
—
—
—
—
11
Units
mA
mA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
nA
μA
μA
μA
°C
°C
—
Ω
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
5