TA0103A Datasheet, PDF (7/18 Pages) Tripath Technology Inc. – Stereo 250W (4Ω) Class-T Digital Audio Amplifier Driver using Digital Power Processing (DPPTM) Technology

Tripath Technology, Inc. - Technical Information
Typical Performance at Vs = +45V
THD+N vs Output Power
10
20Hz - 22kHz BW
5 _{f = 1kHz}
BBM = 65nS
2
V_S = +/-45V
Av = 20.75
1 ^{ST STW38NB20 MOSFET}
0.5
8Ω
4Ω
0.2
0.1
0.05
0.02
0.01
1
2
5
10
20
50
100
Output Power (W)
200 300
Efficiency versus Output Power
100
90
80
70
60
50
40
30
20
10
0
0
R_L = 8Ω
R_L = 4Ω
22Hz - 22kHz BW
f = 1kHz
BBM = 145nS
V_S = +/-45V
Av = 20.75
ST STW38NB20 MOSFET
25 50 75 100 125 150 175 200 225 250 275 300
Output Power (W)
THD+N versus Frequency versus
Break Before Make, R_L = 8Ω
10 _{20Hz - 22kHz BW}
5 Pout = 35W/Channel
V_S = +/-45V
2 ^{Av = 20.75}
ST STW38NB20 MOSFET
1
0.5
0.2
0.1
0.05
0.02
0.01
10
20
145nS
105nS
65nS
50 100 200
500 1k
2k
Frequency (Hz)
5k 10k 20k
THD+N versus Frequency versus
Break Before Make, R_L = 4Ω
10 20Hz - 22kHz BW
Pout = 60W/Channel
5 _{VS = +/-45V}
Av = 20.75
2 _{ST STW38NB20 MOSFET}
1
0.5
0.2
0.1
0.05
0.02
0.01
10
20
145nS
105nS
65nS
50 100 200
500 1k
2k
5k
Frequency (Hz)
10k 20k
THD+N versus Frequency versus
Bandwidth, R_L = 8Ω
10 BBM = 65nS
5 ^{Pout = 35W/Channel}
V_S = +/-45V
2
Av = 20.75
ST STW38NB20 MOSFET
1
0.5
0.2
0.1
0.05
0.02
0.01
10
20
30kHz BW
22kHz BW
50 100 200
500 1k
2k
Frequency (Hz)
5k 10k 20k
THD+N versus Frequency versus
Bandwidth, R_L = 4Ω
10 BBM = 65nS
5 ^{Pout = 60W/Channel}
V_S = +/-45V
Av = 20.75
2 _{ST STW38NB20 MOSFET}
1
0.5
0.2
0.1
0.05
0.02
0.01
10
20
30kHz BW
22kHz BW
50 100 200
500 1k
2k
Frequency (Hz)
5k 10k 20k
7
TA0103 – Rev 3.3/06.00