Tr i p ath Technol ogy, I n c. - Techni cal I n for m ati on

3

TC2000 – KLI/1.1/12-03

TC2000 AUDIO SIGNAL PROCESSOR PIN DESCRIPTIONS

Pin

Function

Description

1

BIASCAP

Bandgap reference times two (typically 2.5VDC). Used to set the common mode voltage

for the input op amps. This pin is not capable of driving external circuitry.

2, 6

FDBKP2, FDBKP1

Positive switching feedback.

3

DCMP

Internal mode selection. This pin must be grounded for proper device

operation.

4, 7

FDBKN2, FDBKN1

Negative switching feedback.

5

VPWR

Test pin. Must be left floating.

8

HMUTE

Logic output. A logic high indicates both amplifiers are muted, due to the mute pin state, or

a “fault”.

9, 12

Y1, Y2

Non-inverted switching modulator outputs.

10, 11

Y1B, Y2B

Inverted switching modulator outputs.

13

NC

No connect

14,16

OCD2, OCD1

Over Current Detect. Ground if not used.

15

REF

Internal reference voltage; approximately 1.2 VDC.

17

VNNSENSE

Negative power stage over/under supply voltage sense resistor tie point.

18

OVRLDB

A logic low output indicates the input signal has overloaded the amplifier.

19

VPPSENSE

Positive power stage over/under supply voltage sense resistor tie point.

20

AGND

Ground

21

V5

5 Volt power supply input.

22, 27

OAOUT1, OAOUT2

Input stage output pins.

23, 28

INV1, INV2

Single-ended inputs. Inputs are a “virtual” ground of an inverting opamp with

approximately 2.4VDC bias.

24

MUTE

When set to logic high, both amplifiers are muted and in idle mode. When low (grounded),

both amplifiers are fully operational. If left floating, the device stays in the mute mode.

Ground if not used.

25, 26

BBM1, BBM0

Break-before-make timing control.

TC2000 AUDIO SIGNAL PROCESSOR PINOUT

BIASCAP

FDBKP2

DCMP

FDBKN2

VPW R

FDBKP1

FDBKN1

HMUTE

Y1

Y1B

Y2B

Y2

NC

OCD2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

REF

OCD1

VNNSENSE

OVRLDB

VPPSENSE

AGND

V5

OAOUT1

INV1

MUTE

BBM1

BBM0

OAOUT2

INV2