Tri p ath Techn o l o g y, I n c. - T echn i cal I n fo rmation

4

TCA2002 – KLi/0.95/04.06

T CA2002 PI N DESCRI PTI ON

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

FBKP2

FBKP1

Positive switching feedback (Channels 2 & 1)

3

DCMP

Internal mode selection. Grounding this pin enables 16-pulses during startup.

Connecting this pin to V5 disables 16-pulses during startup, which minimizes

turn-on pop. DCMP must be grounded when connected to fet drivers or power

stages using bootstrapped high-side supplies.

4

7

FBKN2

FBKN1

Negative switching feedback (Channels 2 & 1)

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. (Channels 1 & 2)

10, 11

Y1B, Y2B

Inverted switching modulator outputs. (Channels 1 & 2)

13

NC

No connect

14,16

OCD2, OCD1

muted. Ground if not used. The TCA2002 will try to automatically recover from

an over current fault with an approximately 950mS repetition rate.

15

REF

Internal reference voltage; approximately 1.0 VDC. Connect and 8.25k

Ω, 1% to

AGND.

17

VNNSENSE

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

voltage sensing for the VNN supply.

18

OVRLDB

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

19

VPPSENSE

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

voltage sensing for the VPP supply.

20

AGND

Ground

21

V5

5 Volt power supply input.

22

27

OAOUT1

OAOUT2

Input stage output pins. (Channels 1 and 2)

23, 28

INV1, INV2

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

approximately 2.5VDC bias. The bias at INV1 and INV2 is active, even if the

MUTE pin is high.

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 to prevent shoot-through in the output

MOSFETs. Please refer to the Application Information section additional

information.