A4962 datasheet(7/42 Pages) ALLEGRO

Part #	A4962

Description	Sensorless BLDC Controller

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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Sensorless BLDC Controller

A4962

7

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Logic Inputs & Outputs

Input Low Voltage

VIL

–

0.8

V

Input High Voltage (except PWM)

VIH

2.0

–

V

Input High Voltage (PWM)

VIH

2.1

–

V

Input Hysteresis

VIhys

150

550

–

mV

Input Pull-down Resistor (PWM, SDI,

SCK)

RPD

30

50

70

kΩ

Input Pull-down Resistor (STRn)

RPU

30

50

70

kΩ

Output Low Voltage (SDO)

VOL

IOL = 1 mA

–

0.2

0.4

V

Output High Voltage (SDO)

VOH

IOL = 1 mA2

2.4

3.0

–

V

Output Leakage2 (SDO)

IO

0 V < VO < 5.5 V, STRn = 1

–1

–

1

µA

Output Low Voltage (FAULTn, SPD)

VOL

IOL = 4 mA. FAULTn active

–

0.2

0.4

V

Output Current Limit (FAULTn, SPD)

IOLIM

0 V < VO < 15 V, FAULTn active

–

10

17

mA

15 V ≤ VO < 50 V, FAULTn active

–

2

mA

Output Leakage2 (FAULTn, SPD)

IO

0 V < VO < 12 V, FAULTn inactive

–1

–

1

µA

12 V ≤ VO < 50 V, FAULTn inactive

–

1.7

mA

Logic I/O – Timing Parameters

PWM Duty Detect Frequency Range

fPWD

5

–

1 k

Hz

PWM Brake Time

tBRK

500

–

µs

Serial Interface – Timing Parameters

Clock High Time

tSCKH

A in Figure 1

50

–

ns

Clock Low Time

tSCKL

B in Figure 1

50

–

ns

Strobe Lead Time

tSTLD

C in Figure 1

30

–

ns

Strobe Lag Time

tSTLG

D in Figure 1

30

–

ns

Strobe High Time

tSTRH

E in Figure 1

300

–

ns

Data Out Enable Time

tSDOE

F in Figure 1

–

40

ns

Data Out Disable Time

tSDOD

G in Figure 1

–

30

ns

Data Out Valid Time from Clock

Falling

tSDOV

H in Figure 1

–

40

ns

Data Out Hold Time from Clock

Falling

tSDOH

I in Figure 1

5

–

ns

Data In Set-up Time to Clock Rising

tSDIS

J in Figure 1

15

–

ns

Data In Hold Time from Clock Rising

tSDIH

K in Figure 1

10

–

ns

Motor Start-up Parameters

Hold Duty Cycle

DH

Default power-up value

35.5

37.5

39.5

%

Hold Time

tHOLD

Default power-up value

15.2

16

16.8

ms

Start Speed

fST

Default power-up value

7.6

8

8.4

Hz

ELECTRICAL CHARACTERISTICS (continued): valid at TA= 25°C, VBB = 4.2 V to 28 V (unless noted otherwise)

Contiued on next page...

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