參數(shù)資料
型號： TC2001
廠商： Electronic Theatre Controls, Inc.
英文描述： CONNECTOR ACCESSORY
中文描述： 連接器附件
文件頁數(shù)： 15/34頁
文件大小： 663K
代理商： TC2001
Tripath Technology, Inc. - Technical Information
15
TK2150 – Rev. 1.0/12.02
Application Information
Figure 1 is a simplified diagram of one channel (Channel 1) of a TK2150 amplifier to assist in
understanding its operation.
Figure 1: Simplified TK2150 Amplifier
TK2150 Basic Amplifier Operation
The audio input signal is fed to the processor internal to the TC2001, where a switching pattern is
generated. The average idle (no input) switching frequency is approximately 700kHz. With an
input signal, the pattern is spread spectrum and varies between approximately 200kHz and
1.5MHz depending on input signal level and frequency. Complementary copies of the switching
pattern is output through the Y1 and Y1B pins on the TC2001. These switching patterns are input
to the TP2150 where they are level-shifted by the MOSFET drivers and then output to the gates
(HO1 and LO1) of external power MOSFETs that are connected as a half bridge. The output of
the half bridge is a power-amplified version of the switching pattern that switches between VPP
and VNN. This signal is then low-pass filtered to obtain an amplified reproduction of the audio
input signal.
The TC2001 processor is operated from a 5-volt supply. In the generation of the switching
patterns for the output MOSFETs, the processor inserts a “break-before-make” dead time
between the turn-off of one transistor and the turn-on of the other in order to minimize shoot-
through currents in the external MOSFETs. The dead time can be programmed by setting the
break-before-make control bits, BBM1 and BBM0. Feedback information from the output of the
half-bridge is supplied to the processor via FBKOUT1. Additional feedback information to
account for ground bounce is supplied via FBKGND1.
HMUTE
OAOUT1
INV1
C
I
22
23
8
+
Analog
Ground
Power Ground
V5
-
+
AGND
MUTE
24
5V
V5
15
REF
R
REF
42
VNN
R
VPP1
VPP
VNN
19
VPPSENSE
17
VNNSENSE
C
SW
VN10
41,43
VNN
Offset Trim
Circuit
R
VNN1
R
VPP1
V5
V5
R
VNN2
Processing
&
Modulation
C
B
0.1uF
C
BAUX
R
B
VN10
D
B
VN10
FBKOUT1
6
7
FBKGND1
+
R
L
C
HBR
LO1
44
45
54
R
G
Q
O
HO1
48
R
G
Q
O
LO1COM
OCS1LP
HO1COM
47
OCS1LN
53
VBOOT1
57
OCS1HP
51
OCS1HN
50
R
S
R
S
C
S
VPP
VNN
R
OFA
V5
R
OFB
C
OF
R
F
R
I
VNN
R
FBB
R
FBB
R
FBC
R
FBC
C
FB
C
OCR
R
OCR
OCR1
16
C
S
R
FBA
R
FBA
V5
OUTPUT
FILTER
BIASCAP
C
A
1
2.5V
C
S
21
20
V5
AGND
5V
OVER
CURRENT
DETECTION
OVER
CURRENT
DETECTION
OVER/
UNDER
VOLTAGE
DETECTION
25
BBM1
26
BBM0
F. BEAD
VN10
TC2001
TP2150
OVER
CURRENT
DETECTION
OCR1
Y1
Y1B
9
10
17
16
7
C
S
6
5
V5
AGND
5V
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