參數(shù)資料
型號: MAX9768EVKIT+
廠商: Maxim Integrated Products
文件頁數(shù): 13/26頁
文件大?。?/td> 0K
描述: EVALUATION KIT FOR MAX9768
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 1
放大器類型: D 類
輸出類型: 1-通道(單聲道)
在某負載時最大輸出功率 x 通道數(shù)量: 10W x 1 @ 8 歐姆
電源電壓: 4.5 V ~ 14 V
工作溫度: -40°C ~ 85°C
板類型: 完全填充
已用 IC / 零件: MAX9768
已供物品:
MAX9768
10W Mono Class D Speaker
Amplifier with Volume Control
20
______________________________________________________________________________________
Applications Information
Filterless Class D Operation
The MAX9768 can be operated without a filter and
meet common EMC radiation limits when the speaker
leads are less than approximately 10cm. Lengths
beyond 10cm are possible but should be verified
against the appropriate EMC standard. Select the filter-
less modulation mode with spread-spectrum modula-
tion mode for best performance.
For longer speaker wire lengths, a simple ferrite bead
and capacitor-based filter can be used to meet EMC
limits. See Figure 7 for the correct connections of these
components. Select a ferrite bead with 100
Ω to 600Ω
impedance, and rated for at least 1.5A. The capacitor
value will vary based on the ferrite bead chosen and
the actual speaker lead length. Select the capacitor
value based on EMC performance.
When doing bench evaluation without a filter or a ferrite
bead filter, include a series inductor (68H for 8
Ω load)
to model the actual loudspeaker’s behavior. If this
inductance is omitted, the MAX9768 will have reduced
efficiency and output power, as well as worse THD+N
performance.
Table 7. Setting Class D Output Modulation Scheme
D7 (MSB)
D6
D5
D4
D3
D2
D1
D0 (LSB)
FUNCTION
1
0
1
0
1
0
1
Classic PWM
1
0
1
0
1
0
FILTERLESS MODULATION*
BOOT_+
C1
0.1
μF
C9
330pF
C10
330pF
OUT_+
BOOT_-
C2
0.1
μF
OUT_-
MAX9768
Figure 7. Ferrite Bead Filter
*
Power-on default.
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MAX976ESA+ 功能描述:校驗器 IC Dual High Speed Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓(最大值):6 mV 電源電流(最大值):1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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MAX976ESA-T 功能描述:校驗器 IC Dual High Speed Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓(最大值):6 mV 電源電流(最大值):1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel