MAX9779 查看數據表（PDF） - Maxim Integrated

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MAX9779

2.6W Stereo Audio Power Amplifier and DirectDrive Headphone Amplifier

Maxim Integrated 

2.6W Stereo Audio Power Amplifier and

DirectDrive Headphone Amplifier

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VDD, PVDD, HPVDD, CPVDD to GND)..........+6V

GND to PGND.....................................................................±0.3V

CPVSS, C1N, VSS to GND .........................-6.0V to (GND + 0.3V)

HPOUT_ to GND ....................................................................±3V

Any Other Pin .............................................-0.3V to (VDD + 0.3V)

Duration of OUT_ _ Short Circuit to GND or PVDD .....Continuous

Duration of OUT_+ Short Circuit to OUT_- .................Continuous

Duration of HPOUT_ Short Circuit to GND,

VSS or HPVDD.........................................................Continuous

Continuous Current (PVDD, OUT_ _, PGND) ........................1.7A

Continuous Current (CPVDD, C1N, C1P, CPVSS, VSS, HPVDD,

HPOUT_) .......................................................................850mA

Continuous Input Current (all other pins) .........................±20mA

Continuous Power Dissipation (TA = +70°C)

28-Pin Thin QFN (derate 20.8mW/°C above +70°C) ..1667mW

Junction Temperature ......................................................+150°C

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VDD = PVDD = CPVDD = HPVDD = 5V, GND = PGND = CPGND = 0V, SHDN = VDD, CBIAS = 1µF, C1 = C2 = 1µF, speaker load

terminated between OUT_+ and OUT_-, headphone load terminated between HPOUT_ and GND, GAIN1 = GAIN2 = 0V, TA = TMIN to

TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

GENERAL

Supply Voltage Range

Headphone Supply Voltage

SYMBOL

VDD, PVDD

CPVDD,

HPVDD

Quiescent Supply Current

IDD

Shutdown Supply Current

ISHDN

Bias Voltage

VBIAS

Switching Time

tSW

Input Resistance

RIN

Turn-On Time

tSON

SPEAKER AMPLIFIER (HPS = GND)

Output Offset Voltage

VOS

Power-Supply Rejection Ratio

(Note 3)

PSRR

CONDITIONS

Inferred from PSRR test

Inferred from PSRR test

HPS = GND, speaker mode, RL = ∞

HPS = VDD, headphone mode, RL = ∞

SHDN = GND

Gain or input switching

Amplifier inputs (Note 2)

Measured between OUT_+ and OUT_-,

TA = +25°C

PVDD or VDD = 4.5V to 5.5V (TA = +25°C)

f = 1kHz, VRIPPLE = 200mVP-P

f = 10kHz, VRIPPLE = 200mVP-P

MIN TYP MAX UNITS

4.5

5.5

V

3.0

5.5

V

14

29

mA

7

13

0.2

5

µA

1.7

1.8

1.9

V

10

µs

10

20

30

kΩ

25

ms

±1

±15

mV

75

90

80

dB

55

2 _______________________________________________________________________________________

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