tk2070 Tripath Technology Inc., tk2070 Datasheet - Page 5

• Manufacturer Part Number: tk2070
• Description: Stereo 70w 4ohm Class-t Digital Audio Amplifier Driver Using Digital Power Processing Dpp Technology
• Manufacturer: Tripath Technology Inc.

T C 2 0 0 1 A U D I O S I G N A L P R O C E S S O R P I N D E S C R I P T I O N S
T C 2 0 0 1 A U D I O S I G N A L P R O C E S S O R P I N O U T
5
10, 11
14, 16
22, 27
23, 28
25, 26
9, 12
2, 6
4, 7
Pin
13
15
17
18
19
20
21
24
1
3
5
8
OAOUT1, OAOUT2
OCD2, OCD1
BBM1, BBM0
VNNSENSE
VPPSENSE
FBKGND2,
INV1, INV2
FBKOUT2,
FBKGND1
FBKOUT1
Function
BIASCAP
Y1B, Y2B
OVRLDB
HMUTE
VPWR
Y1, Y2
DCMP
AGND
MUTE
REF
NC
V5
FBKGND2
FBKGND1
FBKOUT2
FBKOUT1
BIASCAP
HMUTE
VPW R
DCMP
OCD2
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.
Ground Kelvin feedback (Channels 1 & 2)
Internal mode selection. This pin must be grounded for proper device
operation.
Switching feedback (Channels 1 & 2)
Test pin. Must be left floating.
Logic output. A logic high indicates both amplifiers are muted, due to the
mute pin state, or a “fault”.
Non-inverted switching modulator outputs.
Inverted switching modulator outputs.
No connect
Over Current Detect pins. Not used on the TK2070, these pins should
be tied to ground.
Internal bandgap reference voltage; approximately 1.2 VDC.
Negative supply voltage sense input. This pin is used for both over and
under voltage sensing for the VNN supply. Not used on the TK2070, this
pin should be tied to ground through a 10k: resistor.
A logic low output indicates the input signal has overloaded the amplifier.
Positive supply voltage sense input. This pin is used for both over and
under voltage sensing for the VPP supply.
Analog Ground.
5 Volt power supply input.
Input stage output pins.
Single-ended inputs. Inputs are a “virtual” ground of an inverting op-amp
with approximately 2.4VDC bias.
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.
Break-before-make timing control to prevent shoot-through in the output
MOSFETs. When using with the TPS1035, these pins should both be
set to 5V.
Y1B
Y2B
NC
Y1
Y2
10
11
12
13
14
1
2
3
4
5
6
7
8
9
28-pin SOIC
(Top View)
27
26
25
24
23
22
21
20
19
18
16
15
28
17
Description
VNNSENSE
INV1
V5
OVRLDB
OCD1
REF
INV2
OAOUT2
BBM0
BBM1
MUTE
OAOUT1
AGND
VPPSENSE
T r i p a t h T e c h n o l o g y , I n c . - T e c h n i c a l I n f o r m a t i o n
TK2070 – MC/2.1/10-03