MP6504

– 32V, 2A, MICROSTEPPING MOTOR DRIVER W/ INTEGRATED MOSFETS

MP6504 Rev. 1.0

www.MonolithicPower.com

8

5/17/2017

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

© 2017 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

Name

Description

1, 10

VIN

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

2

AOUT1

Bridge A output terminal 1.

3, 4

SENA

Bridge A sense resistor connector. Connect SENA to the current sensor resistor

for bridge A.

5

AOUT2

Bridge A output terminal 2.

6

BOUT2

Bridge B output terminal 2.

7, 8

SENB

Bridge B sense resistor connector. Connect SENB to the current sensor resistor

for bridge B.

9

BOUT1

Bridge B output terminal 1.

11

nSLEEP

Sleep mode input. Drive nSLEEP logic low to enter low-power sleep mode; drive

nSLEEP logic high for normal operation. nSLEEP has an internal pull-down resistor.

12

VG

Gate drive regulator output. Bypass VG to GND with a 1µF, 16V ceramic capacitor.

13

nRSET

Reset input. Drive nRSET logic low to initialize the translator and reset the internal

logic; drive nRSET logic high for normal operation. nRSET has an internal pull-down

resistor.

14

nENBL

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

operation; drive nENBL logic low to enable outputs and translator. nENBL has an

internal pull-down resistor.

15

MS2

Mode select. MS1 and MS2 set the step mode to full-, half-, quarter-, or eighth-step.

MS1 and MS2 have internal pull-down resistors. See the Microstep Selection section

on page 11 for more details.

16

MS1

17

DIR

Direction input. The logic level applied to DIR sets the direction of motor rotation.

DIR has an internal pull-down resistor.

18

STEP

Step input. A rising edge on STEP sequences the translator and advances the motor

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

19

nFAULT

Fault indication output. nFAULT is driven low when a fault condition (OCP, OVP,

OTS) occurs. nFAULT is an open-drain output. If used, it requires an external pull-up

resistor.

20

nHOME

Home position output. nHOME is driven low when the indexer is at the home

position in the step table. nHOME an open-drain output. If used, it requires an

external pull-up resistor.

21

ROSC

Constant off-time setting input. A resistor from ROSC to GND sets the PWM off

time.

22

MDS

Mixed decay setting. The voltage applied to the MDS input sets the PWM decay

mode. See the Decay Modes section on page 11 for details.

23

VREF

Reference voltage input. The voltage applied to the VREF input in conjunction with

the current sense resistance defines the current through the motor. VREF can be

connected to 3P3VOUT.

24

3P3VOUT

3.3V regulator output. 3P3VOUT is a 3.3V regulator output. Decouple 3P3VOUT

with a 0.47μF, 6.3V ceramic capacitor to GND.

25

CPA

Charge pump capacitor. Connect a 100nF ceramic capacitor between CPA and

CPB. The capacitor must be rated for at least the voltage applied to VIN.

26

CPB

27

VCP

Charge pump output. VCP requires a 1

μF, 16V ceramic capacitor to VIN.

28, PAD

GND

Ground. Connect both GND and the exposed pad to ground directly.