MP6500

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

MP6500 Rev. 1.01

www.MonolithicPower.com

10

12/27/2017

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2017 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

QFN

Pin #

TSSOP

Name

Description

1

11

DIR

Direction input. DIR has an internal pull-down resistor.

2

12

nFAULT

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

when in a fault condition (OCP, OTP, OVP).

3

13

ISET

Current set programming. A resistor from ISET to ground sets the current

through the motor.

4

14

AGND

Analog ground.

5

15

ROSC

Constant off-time programming. A resistor from ROSC to ground sets the

PWM off time.

6

16

MS2

Mode selection. MS1 and MS2 set the step mode (full, 1/2, 1/4, or 1/8 step).

MS1 and MS2 have an internal pull-down resistor.

7

18

MS1

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

STEP

Step input. The rising edge sequences the translator and advances the motor

by one increment. STEP has an internal pull-down resistor.

14

25

VCP

Charge pump output. VCP requires a 1µF, 16V, ceramic capacitor 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. VG requires a 220nF, 16V, ceramic

capacitor to ground.

-

3, 17,

26, 27

NC

No connection.

18

4

nENBL

Enable input. Drive nENBL to logic high to disable the bridge outputs and

translator operation. Drive nENBL to logic low to enable the bridge outputs and

translator operation. nENBL has an internal pull-down resistor.

19

5

nSLEEP

Sleep mode input. 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.