Low-Cost, Mono, 1.4W BTL Audio Power

Amplifiers

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7

OUTPUT POWER

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.0

4.5

4.0

3.5

3.0

0.3

0.6

0.9

1.2

1.5

1.8

0

2.5

5.5

Ω

f = 1kHz

THD+N = 10%

THD+N = 1%

1.5

2.0

2.5

3.0

0

OUTPUT POWER

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

5.0

4.5

4.0

3.5

3.0

2.5

5.5

THD+N = 10%

THD+N = 1%

Ω

f = 1kHz

1.0

0.5

OUTPUT POWER

vs. LOAD RESISTANCE

LOAD RESISTANCE (

Ω)

10

0.5

1.0

1.5

2.0

2.5

0

1

100

THD+N = 1%

THD+N = 10%

f = 1kHz

100

200

300

400

500

600

700

0

OUTPUT POWER

vs. LOAD RESISTANCE

LOAD RESISTANCE (

Ω)

10

1

100

f = 1kHz

THD+N = 1%

THD+N = 10%

POWER DISSIPATION

vs. OUTPUT POWER

OUTPUT POWER (W)

1.2

0.9

0.6

0.3

0.2

0.4

0.6

0.8

1.0

0

01.5

Ω

f = 1kHz

50

100

150

200

250

300

0

POWER DISSIPATION

vs. OUTPUT POWER

OUTPUT POWER (mW)

400

300

200

100

0

500

Ω

f = 1kHz

POWER DISSIPATION

vs. OUTPUT POWER

OUTPUT POWER (W)

1.6

1.2

0.8

0.4

0.4

0.8

1.2

1.6

2.0

0

02.0

Ω

f = 1kHz

600

500

400

300

200

100

100

200

300

400

500

600

700

0

0700

POWER DISSIPATION

vs. OUTPUT POWER

OUTPUT POWER (mW)

Ω

f = 1kHz

OUTPUT-NOISE DENSITY

vs. FREQUENCY

FREQUENCY (Hz)

10k

1k

100

200

300

400

500

600

0

100

100k

Typical Operating Characteristics (continued)