Tri path Technol og y, I nc. - Techni cal I nformation
E X T E R N A L C O M P O N E N T S D E S C R I P T I O N
(Refer to the Application/Test Circuit)
Component
C
S
C
Z
R
Z
L
O
Description
Supply decoupling for the power supply pins. For optimum performance, these
components should be located close to the TC2000/TP2050 and returned to their
respective ground as shown in the Application/Test Circuit.
Zobel capacitor, which in conjunction with R
Z
, terminates the output filter at high
frequencies. Use a high quality film capacitor capable of sustaining the ripple current
caused by the switching outputs.
Zobel resistor, which in conjunction with C
Z
, terminates the output filter at high
frequencies. The combination of R
Z
and C
Z
minimizes peaking of the output filter
under both no load conditions or with real world loads, including loudspeakers which
usually exhibit a rising impedance with increasing frequency. The recommended
power rating is 1 Watt.
Output inductor, which in conjunction with C
O
, demodulates (filters) the switching
waveform into an audio signal. Forms a second order filter with a cutoff frequency
of
f
C
=
1 ( 2
π
L
O
C
O
)
and a quality factor of
Q
=
R
L
C
O
L
O
C
O
.
Output capacitor, which in conjunction with L
O
, demodulates (filters) the switching
waveform into an audio signal. Forms a second order low-pass filter with a cutoff
frequency of
f
C
=
1 ( 2
π
L
O
C
O
)
and a quality factor of
Q
=
R
L
C
O
L
O
C
O
.
Use
a high quality film capacitor capable of sustaining the ripple current caused by the
switching outputs. Electrolytic capacitors should not be used.
High-frequency bypass capacitor for V
CC
– GND on each supply pin. A 50V rating is
required for this component.
Optional snubber capacitor, which in conjunction with R
SN
, reduces overshoot on
non-optimal layouts. Only required if switching output overshoot is above rated
voltage of TP2500. Use low-dissipation type (NPO).
Optional snubber resistor, which in conjunction with C
SN
, reduces overshoot on non-
optimal layouts. Only required if switching output overshoot is above rated voltage
of TP2500. Required ¼ Watt rating.
Differential mode capacitor.
C
O
C
HBR
C
SN
R
SN
C
DM
7
TP2050– KL/1.0/07.05
TRIPATH [ TRIPATH TECHNOLOGY INC. ]
