ML4411A Просмотр технического описания (PDF) - Micro Linear Corporation

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производитель

ML4411A

Sensorless Spindle Motor Controller

Micro Linear Corporation 

ML4411/ML4411A

PIN CONFIGURATION

ML4411

28-Pin SOIC (S28W)

GND 1

P1 2

P2 3

VCC2 4

P3 5

COTA

6

CBRK

7

DIS PWR 8

N1 9

N2 10

N3 11

ISENSE 12

COS 13

CVCO 14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

TOP VIEW

ICMD

ILIMIT

BRAKE

VCC

PH3

PH2

PH1

IRAMP

RC

+5V

ENABLE E/A

PWR FAIL

RESET

VCO/TACH OUT

PIN DESCRIPTION

PIN NAME

FUNCTION

1 GND

Signal and Power Ground

2 P1

Drives the external P-channel

transistor driving motor PH1

3 P2

Drives the external P-channel

transistor driving motor PH2

4 VCC2

12V power and power for the

braking function

5 P3

Drives the external P-channel

transistor driving motor PH3

6 COTA

Compensation capacitor for linear

motor current amplifier loop

7 CBRK

Capacitor which stores energy to

charge N-channel MOSFETs for

braking with power off.

8 DIS PWR

A logic 0 on this pin turns off the N

and P outputs and causes the TACH

comparator output to appear on TACH

OUT

9-11 N1, N2 N3 Drives the external N-channel

MOSFETs for PH1, PH2, PH3

12 ISENSE

13 COS

Motor current sense input

Timing capacitor for fixed off-time

PWM current control

14 CVCO

Timing capacitor for VCO

15 VCO/TACH Logic Output from VCO or TACH

OUT

comparator

PIN NAME

FUNCTION

16 RESET

Input which holds VCO off and sets the

IC to the RESET condition

17 PWR FAIL

A “0” output indicates 5V or 12V is

under-voltage. This is an open

collector output with a 4.5ký pull-up

to +5V

18 ENABLE E/A A ”1” logic input enables the error

amplifier and closes the back-EMF

feedback loop

19 +5V

5V power supply input

20 RC

VCO loop filter components

21 IRAMP

Current into this pin sets the initial

acceleration rate of the VCO during

start-up

22 PH1

Motor Terminal 1

23 PH2

Motor Terminal 2

24 PH3

Motor Terminal 3

25 VCC

12V power supply. Terminal which is

sensed for power fail

26 BRAKE

A ”0” activates the braking circuit

27 ILIMIT

Sets the threshold for the PWM

comparator

28 ICMD

Current Command for Linear Current

amplifier

2

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