MP6601 – 35V, 2.5A, STEPPER MOTOR DRIVER W/ INTERNAL CURRENT SENSE

MP6601 Rev. 1.01

www.MonolithicPower.com

8

9/4/2018

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© 2018 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

QFN

Pin #

TSSOP

Name

Description

1

11

AI1

Current-set inputs for phase A.

2

12

nFAULT

Fault indication. nFAULT is an open-drain output. nFAULT is at logic low

when a fault condition occurs (i.e.: OCP, OTP, OVP).

3

13

ISET

Current set programming pin. Connect a resistor from ISET to ground to

set the current through the motor.

4

14

AI0

Current-set inputs for phase A.

5

15

ROSC

Constant off time programming pin. Connect a resistor from ROSC to

ground to set the PWM off time.

6

16

BI0

Current-set inputs for phase B.

7

18

BI1

8, 12,

20, 24,

EP

6, 10,

19, 23,

EP

GND

Power ground.

9

20

BOUT1

Bridge B output terminal 1.

10, 22

8, 21

VIN

Input supply voltage. Both VIN pins must be connected to the same

supply. Decouple VIN to ground with a minimum 100nF ceramic capacitor.

11

22

BOUT2

Bridge B output terminal 2.

13

24

BPHASE

Phase (direction) input for bridge B.

14

25

VCP

Charge pump output. Connect a 1µF, 16V ceramic capacitor from VCP

to VIN.

15

28

CP2

Charge pump capacitor. Connect a 100nF ceramic capacitor rated for

the VIN voltage between these terminals.

16

1

CP1

17

2

VG

Low-side MOSFETs gate drive voltage. Connect a 220nF, 16V ceramic

capacitor from VG to ground.

-

3, 17,

26, 27

NC

No connection.

18

4

APHASE

Phase (direction) input for bridge A.

19

5

nSLEEP

Sleep mode input. Drive nSLEEP to logic low to place the MP6601 in

low-power sleep mode. Drive nSLEEP to logic high to enable normal

operation. nSLEEP has an internal pull-down resistor.

21

7

AOUT2

Bridge A output terminal 2.

23

9

AOUT1

Bridge A output terminal 1.