TCD6000 Datasheet, PDF (27/36 Pages) Tripath Technology Inc. – 6 CHANNEL CLASS-T DIGITAL AUDIO PROCESSOR USING DIGITAL POWER PROCESSINGTM TECHNOLOGY

Output Delay Control
Addr
73h
Register Name
Output Delay Control
Default
Tripath Technology, Inc. – Preliminary Technical Information
D7
D6
D5
D4
D3
D2
D1
D0
0
0
YSGL
0
YD3 YD2 YD1 YD0
0
0
0
0
0
0
0
0
During automatic DC calibration the TCD6000 expects to be able to turn off both the high and low side FETs
by pulling Y and Yb low. However, some power stages like the Tripath TPD2075 and TPD2125 only have a
single Y input instead of complimentary Y and Yb inputs. When using this type of power stage, YSGL should
be cleared to ‘1’. Then, during automatic DC calibration, HPO should be set to ‘1’. This keeps the HMUTE
output high during automatic DC calibration. After waiting for automatic DC calibration to complete, HPO can
be set to ‘0’ to resume normal switching. When using other power stages, YSGL can be kept at ‘0’.
The YDn bits control the loop delay of the Class-T amplification channels. This can be used to control the
maximum output switching frequency. Each channel receives the same amount of additional delay which
defaults to 15nS but can be increased from 15nS to 240nS in 15nS steps.
YD<3:0>
0000 (POR default)
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Actual count
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Processor Y-output delay
15 nS
30 nS
45 nS
60 nS
75 nS
90 nS
105 nS
120 nS
135 nS
150 nS
165 nS
180 nS
195 nS
210 nS
225 nS
240 nS
Truth table for Y-output delay control.
Headphone and Logic Output Control
Addr
74h
Register Name
Headphone and Logic Output
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
HMP HPO
TO
0
0
0
0
0
0
0
0
0
0
0
0
Setting the TO control bit to ‘1’ forces the TST_EN output pin to go high. This pin can be used to put the
power stage IC into test mode. If the power stage does not have a TST_EN input, the TST_EN output can
be used as a general purpose logic output.
The HPO control bit immediately stops all switching without muting the headphone amplifier outputs.
The HMP bit controls whether the HMUTE output is active high or active low. Setting HMP to ‘1’ causes the
HMUTE output to be active low.
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TCD6000 – Rev. 1.0/09.04