VFP PACKAGE

(TOP VIEW)

31 30 29 28 27

9 10

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

PWM

PGND

PGND

PGND

PGND

PGND

PGND

H/C

AVDD

AGND

ROSC

COSC

AREF

IN+

IN−

SHUTDOWN

32

26

11 12 13 14 15 16

25

PowerPAD

™

DRV593

DRV594

SLOS401C – OCTOBER 2002 – REVISED JULY 2010

www.ti.com

PIN ASSIGNMENTS

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

NO.

AGND

2

Analog ground

AREF

5

O

Connect 1 mF capacitor to ground for AREF voltage filtering

AVDD

1

I

Analog power supply

COSC

4

I

Connect capacitor to ground to set oscillation frequency (220 pF for 500 kHz, 1 nF for 100 kHz) when

the internal oscillator is selected; connect clock signal when an external oscillator is used

FAULT0

10

O

Fault flag 0, low when active open drain output (see application information)

FAULT1

9

O

Fault flag 1, high when active open drain output (see application information)

FREQ

32

I

Selects 500 kHz switching frequency when a TTL logic low is applied to this terminal; selects 100 kHz

switching frequency when a TTL logic high is applied

IN–

7

I

Negative differential input

IN+

6

I

Positive differential input

INT/EXT

31

I

Selects the internal oscillator when a TTL logic high is applied to this terminal; selects the use of an

external oscillator when a TTL logic low is applied to this terminal

H/C

14, 15,

O

Direction control output for heat and cool modes (4 pins)

16, 17

PWM

24, 25,

O

PWM output for voltage magnitude (4 pins)

26, 27

PGND

18, 19,

High-current ground (6 pins)

20, 21,

22, 23

PVDD

11, 12,

I

High-current power supply (6 pins)

13, 28,

29, 30

ROSC

3

I

Connect 120-k

Ω resistor to AGND to set oscillation frequency (either 500 kHz or 100 kHz). Not needed

if an external clock is used.

SHUTDOWN

8

I

Places the amplifier in shutdown mode when a TTL logic low is applied to this terminal; places the

amplifier in normal operation when a TTL logic high is applied

4

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