A8904SLBTR-T datasheet(5/18 Pages) ALLEGRO

Part #	A8904SLBTR-T

Description	3-Phase Brushless DC Motor Controller/Driver with Back EMF Sensing

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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3-Phase Brushless DC Motor Controller/Driver

with Back EMF Sensing

A8904

5

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

ELECTRICAL CHARACTERISTICS at TA = +25°C, VDD = 5.0 V

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Logic Supply Voltage

VDD

Operating

4.5

5.0

5.5

V

Logic Supply Current

IDD

Operating

—

7.5

10

mA

Sleep mode

—

250

500

μA

Undervoltage Threshold

UVLO

Decreasing VDD

—

3.6

—

V

Increasing VDD

—

3.9

—

V

Load Supply Voltage

VBB

Operating

4.0

—

14

V

Load Supply Current

IBB

Operating

—

4.0

8.0

mA

Sleep mode

—

20

30

μA

Thermal Shutdown

TJ

—

165

—

°C

Thermal Shutdown Hysteresis

TJ

—

20

—

°C

Output Drivers

Output Leakage Current

IDSX

VBB = 14 V, VOUT = 14 V, sleep mode

—

200

300

μA

VBB = 14 V, VOUT = 0 V

—

-2.0

-15

μA

Total Output ON Resistance

rDS(on)

IOUT = 600 mA

—

1.0

1.4



(source + sink + RS)

Output Sustaining Voltage

VDS(sus)

VBB = 14 V, IOUT = IOUT(MAX), L = 3 mH

14

—

V

Clamp Diode Forward Voltage

VF

IF = 1.0 A

—

1.25

1.5

V

Control Logic

Logic Input Voltage

VIN(0)

SECTOR DATA, RESET, CLK,

—

0.8

V

VIN(1)

CHIP SELECT, OSC

2.0

—

V

Logic Input Current

IIN(0)

VIN = 0 V

—

-0.5

μA

IIN(1)

VIN = 5.0 V

—

±1.0

μA

BRAKE Threshold

VBRK

1.5

1.75

2.0

V

BRAKE Hysteresis Current

IBRKL

VBRK = 750 mV

—

4.0

—

μA

BRAKE Current

IBRK

Brake set, D2 = 1, IBRK = 750 mV

—

20

—

μA

DATA Output Voltage

VOUT(0)

IOUT = 500 μA

—

1.5

V

VOUT(1)

IOUT = -500 μA

3.5

—

V

CST Current

ICST

Charging

-9.0

-10

-11

μA

Discharging, VCST = 2.5 V

—

500

—

μA

CST Threshold

VCSTH

High

2.25

2.5

2.75

V

VCSTL

Low

0.85

1.0

1.15

V

Filter Current

IFILTER

Charging

-9.0

-10

-11

μA

Discharging

9.0

10

11

μA

Leakage, VFILTER = 2.5 V

—

±5.0

nA

Filter Threshold

VFILTERTH

1.57

1.85

2.13

V

CD Current

ICD

Charging

-18

-20

-22

μA

(CD1 or CD2)

Discharging

32

40

48

μA

CD Current Matching

—

ICD(DISCHRG)/ICD(CHRG)

1.8

2.0

2.2

—

CD Threshold

VCDTH

2.25

2.5

2.75

V

CD Input Leakage

ICDIL

—

1.0

μA

Continued next page …

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