參數(shù)資料
型號： MAX98089EVKIT#TQFN
廠商： Maxim Integrated Products
文件頁數(shù)： 8/131頁
文件大?。?/td> 0K
描述： KIT EVAL FOR MAX98089-TQFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
系列： DirectDrive®
主要目的： 音頻編解碼器
嵌入式： 是，DSP
已用 IC / 零件： MAX98089
主要屬性： 2.8 V ~ 5.5 V 輸入電壓
已供物品： 板，線纜，軟件
Low-Power, Stereo Audio Codec
with FlexSound Technology
Table 25. Power Limiter Registers
Power Limiter
The IC’s power limiter tracks the continuous power deliv-
ered to the loudspeaker and briefly mutes the speaker
amplifier output if the speaker is at risk of sustaining
permanent damage.
Loudspeakers are typically damaged when the voice coil
overheats due to extended operation above the rated
power. During normal operation, heat generated in the
voice coil is transferred to the speaker’s magnet, which
transfers heat to the surrounding air. For the voice coil
to overheat, both the voice coil and the magnet must
overheat. The result is that a loudspeaker can operate
above its rated power for a significant time before it heats
sufficiently to cause damage.
The IC’s power limiter includes user-programmable time
constants and power thresholds to match a wide range
of loudspeakers. Program the power limiter’s threshold to
match the loudspeaker’s rated power handling. This can
be determined through measurement or the loudspeak-
er’s specification. Program time constant 1 to match the
voice coil’s thermal time constant. Program time constant
2 to match the magnet’s thermal time constant. The time
constants can be determined by plotting the voice coil’s
resistance vs. time as power is applied to the speaker.
REGISTER
BIT
NAME
DESCRIPTION
0x44
7
PWRTH
Power Limiter Threshold
If the continuous output power from the speaker amplifiers exceeds this threshold,
the output is briefly muted to protect the speaker. The threshold is measured in watts
assuming an 8I load. VBAT must correctly reflect the voltage of SPKLVDD/SP-
KRVDD to achieve accurate thresholds.
6
VALUE
THRESHOLD
(W)
VALUE
THRESHOLD
(W)
0x0
Power limiter
disabled
0x8
0.27
5
0x1
0.05
0x9
0.35
0x2
0.06
0xA
0.48
0x3
0.09
0xB
0.72
0x4
0.11
0xC
1.00
4
0x5
0.13
0xD
1.43
0x6
0.18
0xE
1.57
0x7
0.22
0xF
1.80
2
PWRK
Power Limiter Weighting Factor
Determines the balance between time constant 1 and 2 to match the dominance of
each time constant in the loudspeaker.
1
VALUE
T1 (%)
T2 (%)
000
50
001
62.5
37.5
010
75
25
011
87.5
12.5
0
100
0
101
12.5
87.5
110
25
75
111
37.5
62.5
Maxim Integrated
105
MAX98089
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MAX9860EVKIT+ KIT EVALUATION FOR MAX9860
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX98089EWY+ 制造商:Maxim Integrated Products 功能描述:STEREO AUDIO CODEC WITH FLEXSOUND TUNING TECHNOLOGY AND BASI - Rail/Tube
MAX98089EWY+T 功能描述:接口—CODEC Audio Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX98090AETL+ 功能描述:接口—CODEC 5V 130mW Stereo Headphone Amp RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX98090AETL+T 功能描述:接口—CODEC 5V 130mW Stereo Headphone Amp RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
MAX98090AEWJ+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
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