TAS5121

SLES086A − NOVEMBER 2003 − REVISED MARCH 2004

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3

Terminal Functions

TERMINAL

FUNCTION(1)

DESCRIPTION

NAME

DKD

FUNCTION(1)

DESCRIPTION

BST_A

22

P

High-side bootstrap supply (BST), external resistor and capacitor to OUT_A required

BST_B

33

P

High-side bootstrap supply (BST), external resistor and capacitor to OUT_B required

DGND

9, 14

P

I/O reference ground

DREG

8

P

Digital supply voltage regulator decoupling pin, 1-

µF capacitor connected to DREG_RTN

DREG_RTN

5

P

Decoupling return pin

DVDD

12

P

I/O reference supply input: 100

Ω to DREG, decoupled to GND, 0.1-µF capacitor connected to

GND

GND

1, 3, 16,

18, 21,

27, 28,

34

P

Power ground, connected to system GND

GVDD

6

P

Local GVDD decoupling \pin

GVDD_A

19, 20

P

Gate drive input voltage

GVDD_B

35, 36

P

Gate drive input voltage

M1

10

I

Protection mode selection pin, connect to GND

M2

11

I

Protection mode selection pin, connect to DREG

M3

7

I

Output mode selection pin; connect to GND

OTW

15

O

Overtemperature warning output, open drain with internal pullup resistor, active-low when temper-

ature exceeds 115

°C

OUT_A

25, 26

O

Output, half-bridge A

OUT_B

29, 30

O

Output, half-bridge B

PVDD_A

23, 24

P

Power supply input for half-bridge A

PVDD_B

31, 32

P

Power supply input for half-bridge B

PWM_AP

17

I

PWM input signal, half-bridge A

PWM_BP

2

I

PWM input signal, half-bridge B

RESET

4

I

Reset signal, active-low

SD

13

O

Shutdown signal for half-bridges A and B (open drain with internal pullup resistor), active-low

(1) I = input, O = Output, P = Power