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EB-TA2022 Schematic ( PDF Datasheet ) - ETC

Teilenummer EB-TA2022
Beschreibung CLASS-T DIGITAL AUDIO AMPLIFIER 2 CHANNEL TA2022 EVALUATION BOARD
Hersteller ETC
Logo ETC Logo 




Gesamt 13 Seiten
EB-TA2022 Datasheet, Funktion
Tripath Technology, Inc. - Technical Information
E B - TA 2 0 2 2
CLASS-T DIGITAL AUDIO AMPLIFIER 2 CHANNEL TA2022
EVALUATION BOARD
Technical Information
Revision 1.0 – March 2002
GENERAL DESCRIPTION
The EB-TA2022 Version 4.0 is a stereo 100W per channel audio amplifier
designed to provide a simple and straightforward environment for the evaluation
of the TA2022 amplifier. This evaluation board includes a circuit that will
automatically trim any DC offset at the output and a relay. For additional
documentation on the TA2022, see the TA2022 Data Sheet.
APPLICATIONS
Mini/Micro Component Systems
Home Theater Receivers
Car stereo head units & trunk amplifiers
Powered DVD Systems
BENEFITS
More power per cubic inch for 100W per
channel design
Simplifies thermal management
Signal Quality comparable to linear
amplifiers
Simple building block for multi-channel
design
FEATURES
High Power: 100W @ 4, 1.0% THD+N
Low Noise Floor: 150uV A-weighted
Low Distortion: .02% THD+N @ 75W, 4
High Efficiency: 92% for 8loads
87% for 4loads
Dynamic Range = 102dB
Over-Current Protection
Over and Under Voltage Protection
Over Temperature Protection
Single Ended Outputs
1 EB-TA2022 – Rev. 1.0/03.02






EB-TA2022 Datasheet, Funktion
40 2
41 1
42 1
43 1
44 3
45 1
46 1
47 4
48 4
49 2
50 2
51 2
52 2
R56,57
U2
U1
U3
Q1,Q2,Q4
Q3
K1
CON1,CON2,CON3,CON4
STANDOFF NUT
screw terminal(horiz.)
screw terminal screw
TA2022 washer
TA2022 screw
6;2W
TA2022
LM358
LM339
2N7000
2N3906
DPDT RELAY 8A,24V
3/8"STANDOFF
HEX 4-40
J9,J10
1/4" 4-40
NO. 4 FLAT
3/8" 4-40
P6.2W-2BK-ND
LM358N-ND
LM339N-ND
2N7000FS-ND
2N3906-ND
PB297-ND
4801K-ND
H616-ND
8190k-nd
H342-ND
H734-ND
H781-ND
(2W Thru-hole)
Tripath Technology
8-Dip
14-Dip
TO-92
TO-92
RTE24024F
Keystone 8190
Note 1: Inductor selection is critical for optimal operation of the TA2022 as well as being an important
component in over current protection and EMI containment. Tripath recommends the customer use a
toroidal inductor for all applications with the TA2022. For typical applications we recommend
the Micrometals T68-2 core or the American Cores (Amidon) T690-06. This core has a high peak
current capability due to its low-m Carbonyl-E metal powder. A distributed air gap increases its'
energy storage capability, Which allows for a small footprint and high current capability.
The T68-2 and T690-06 cores have a 17.5mm outer diameter. Forty-four turns of 22AWG wire makes
a complete single layer winding around the toroid with six to eight layers overlapping yielding
an ideal value of 11uH. This widing pattern, which covers the core completely, aids in
shielding the electric field. It should be noted that when multiple layers are used there may be
an increase in winding capacitance, which can cause ringing and increased radiated emmisions.
Winding techniques, such as bank winding, can minimize this effect. It is important that the
innitial windings not be crossed over by the last few windings. If a few windings more than
the single layer are required it is best to wind the core with a full single layer, back off a
number of turns,and rewind over the last few windings. A larger diameter Carbonyl-E core
may be used if a single layer wound core is required. If a smaller core is required, a 15.2mm outer
diameter Carbonyl-E core may be substituted, though thermal requirements must be considered. Please
contact Tripath Applications if there are questions pertaining to this subject.
Substitution Notes:
1- ITEM#2- This component must be .1uF, 100V with X7R material characteristic and placed close
to pins 4,8 and 9,10 of TA2022 with less than 1/8" lead length to the part.
2- ITEM#7- This component should be a high frequency,low ESR capacitor. We recommend .1,
or less and a ripple current rating of at least 1A.
3- ITEM#22- This component should be a 10A inductor with very high linearity. Please see Data Sheet
for substitution details.
4- ITEM#12- This component should be an ultra-fast PN junction rectifier diode with a maximum
Vf of 1V at 10A.
5- ITEM#11- The Bootstrap Diodes(D8,D9)should be Schottky diodes rated at least 200mA,100V,50nS.
The VN10 Diode (D1) should be a Fast Recovery, switching, or Shottky diode rated
at least 200mA,30V,50nS.

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