MPQ6523

– TRIPLE HALF-BRIDGE MOTOR DRIVER WITH SERIAL INPUT CONTROL

MPQ6523 Rev.1.01

www.MonolithicPower.com

12

9/5/2017

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© 2017 MPS. All Rights Reserved.

OPERATION

The MPQ6523 is a three, half-bridge, motor

driver that can drive up to three different loads

with separate controls for high-side or low-side

MOSFETs from a standard serial data interface.

Serial Interface

Data transfer starts with the falling edge of the

CS signal (see Figure 2). Execution of new

input data is enabled on the rising edge of the

CS

signal.

Data

must

appear

at

DI

synchronized to CLK and is accepted on the

falling edge of the CLK signal. LSB (bit0, SRR)

must be transferred first.

The output data at DO is enabled on the falling

edge of CS. The output data changes state with

the rising edge of CLK and remains stable until

the next rising edge of CLK appears. When CS

is high, DO is in a tri-state condition. LSB (bit0,

TP) is transferred first.

CS

DI

CLK

DO

DO

TP

n.u.

n.u.

SLS1

SHS1

n.u.

n.u.

SLS2

SHS2

n.u.

n.u.

SLS3

SHS3

SCD

EN

PSF

SRR

n.u.

n.u.

LS1

HS1

n.u.

n.u.

LS2

HS2

n.u.

n.u.

LS3

HS3

OLD

SCT

SE

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Figure 2: Data Transfer

Table 1: Input Data Protocol

Bit

Input Register

Function

0

SRR

Status register reset (high = reset; the bits PSF, SCD and over-temperature

shutdown in the output data register are set to low).

1

n. u.

Not used.

2

n. u.

Not used.

3

LS1

Controls output LS1 (high = switch output LS1 on).

4

HS1

Controls output HS1 (high = switch output HS1 on).

5

n. u.

Not used.

6

n. u.

Not used.

7

LS2

Controls output LS2 (high = switch output LS2 on).

8

HS2

Controls output HS2 (high = switch output HS2 on).

9

n. u.

Not used.

10

n. u.

Not used.

11

LS3

Controls output LS3 (high = switch output LS3 on).

12

HS3

Controls output HS3 (high = switch output HS3 on).

13

OLD

Open-load detection (low = on).

14

SCT

Programmable time delay for short circuit (shutdown delay high/low =

12ms/1.5ms).

15

SE

Software enable. Low = standby, high = normal operation (data transfer is not

affected by standby function because the digital part is still powered).