TC2001 datasheet(7/34 Pages) TRIPATH

7 / 34 page

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

TK2150 – Rev. 1.0/12.02

TC2001 Audio Signal Processor Pin Descriptions

Function

Description

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

FBKGND2,

FBKGND1

Ground Kelvin feedback (Channels 1 & 2)

DCMP

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

operation.

4, 7

FBKOUT2,

FBKOUT1

Switching feedback (Channels 1 & 2)

VPWR

Test pin. Must be left floating.

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.

No connect

OCD2

Over Current Detect input.

REF

Internal bandgap reference voltage; approximately 1.2 VDC.

OCD1

Over Current Detect input.

VNNSENSE

Negative supply voltage sense input. This pin is used for both over and

under voltage sensing for the VNN supply.

OVRLDB

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

VPPSENSE

Positive supply voltage sense input. This pin is used for both over and

under voltage sensing for the VPP supply.

AGND

Ground.

5 Volt power supply input.

22, 27

OAOUT1, OAOUT2

Input stage output pins.

23, 28

IN1, IN2

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

with approximately 2.4VDC bias.

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 to prevent shoot-through in the output

MOSFETs.

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