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| 型号： | MAX9779ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2.6W AB 28TQFN |
| 标准包装： | 2,500 |
| 系列： | DirectDrive® |
| 类型： | AB 类 |
| 输出类型： | 2-通道（立体声）带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 2.6W x 2 @ 3 欧姆; 110mW x 2 @ 16 欧姆 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 特点： | 消除爆音，短路保护和热保护，关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
MAX9779
2.6W Stereo Audio Power Amplifier and
DirectDrive Headphone Amplifier
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
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
ELECTRICAL CHARACTERISTICS
(VDD = PVDD = CPVDD = HPVDD = 5V, GND = PGND = CPGND = 0V, SHDN = VDD, CBIAS = 1F, C1 = C2 = 1F, 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
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
GENERAL
Supply Voltage Range
VDD, PVDD
Inferred from PSRR test
4.5
5.5
V
Headphone Supply Voltage
CPVDD,
HPVDD
Inferred from PSRR test
3.0
5.5
V
HPS = GND, speaker mode, RL =
∞
14
29
Quiescent Supply Current
IDD
HPS = VDD, headphone mode, RL =
∞
713
mA
Shutdown Supply Current
ISHDN
SHDN = GND
0.2
5
A
Bias Voltage
VBIAS
1.7
1.8
1.9
V
Switching Time
tSW
Gain or input switching
10
s
Input Resistance
RIN
Amplifier inputs (Note 2)
10
20
30
k
Turn-On Time
tSON
25
ms
SPEAKER AMPLIFIER (HPS = GND)
Output Offset Voltage
VOS
Measured between OUT_+ and OUT_-,
TA = +25°C
±1
±15
mV
PVDD or VDD = 4.5V to 5.5V (TA = +25°C)
75
90
f = 1kHz, VRIPPLE = 200mVP-P
80
Power-Supply Rejection Ratio
(Note 3)
PSRR
f = 10kHz, VRIPPLE = 200mVP-P
55
dB
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