_______________________________________________________________________________________ 3

Boosted 2.2W Class D Amplifier

with Automatic Level Control

ELECTRICAL CHARACTERISTICS (continued)

(VBAT = 3.6V, RL = J between SPKP and SPKN, AV = +6dB, CIN = 1FF, 20Hz to 22kHz AC measurement bandwidth, TA = TMIN to

TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Switching Frequency

fS

1.8

2.0

2.2

MHz

Efficiency

E

0.1A P IOUT P 0.75A

93

%

Startup Short-Circuit Time

Converter latch off

50

ms

Thermal Shutdown

165

N

C

LX Leakage Current

VLX = 0V or 5.5V,

VCCOUT = 5.5V

TA = +25NC

-1.0

+0.1

+1.0

F

A

-40NC P TA P +85NC

0.1

SPEAKER AMPLIFIER

Output Offset Voltage

VOS

TA = +25NC

1

3

mV

Click-and-Pop Level

KCP

Peak voltage, TA =

+25NC, A-weighted, 32

samples per second,

ZSPK = 8I + 68FH,

(Notes 3, 4)

Into shutdown

-56

dBV

Out of shutdown

-56

Output Power (Note 5)

POUT

ZSPK = 4I + 33FH

THD+N P 1%

3.4

W

THD+N P 10%

4.1

ZSPK = 8I + 68FH

THD+N P 1%

1.7

THD+N P 10%

2.2

Total Harmonic Distortion Plus

Noise

THD+N

f = 1kHz, POUT = 1.7W, TA = +25NC,

ZSPK = 4I + 33FH

0.05

%

f = 1kHz, POUT = 850mW, TA = +25NC,

ZSPK = 8I + 33FH

0.04

Output Switching Frequency

300

kHz

Gain

AV

GAIN = AGND

5.5

6

6.5

dB

GAIN = unconnected

15

15.5

16

GAIN = VBAT

19.5

20

20.5

Output Current Limit

2

A

Efficiency

E

POUT = 1.5W, f = 1kHz, ZSPK = 8I + 68FH

92

%

POUT = 1.5W, f = 1kHz, ZSPK = 4I + 33FH

87

Output Noise

A-weighted

43

F

VRMS

Input Resistance

RIN

SDBST = SDSPK =

VBAT

AV = 6dB

(GAIN = AGND)

36

54

72

kI

AV = 15.5dB

(GAIN =

unconnected)

12

18

26

AV = 20dB

(GAIN = VBAT)

6.5

11

16

VSDBST = VSDSPK = 0V

All gain settings

110

Common-Mode Rejection Ratio

CMRR

f = 1kHz

60

dB

Bias Voltage

VBIAS

1.3

1.4

1.5

V