參數(shù)資料
型號: MAX9758ETJ+
廠商: Maxim Integrated Products
文件頁數(shù): 9/31頁
文件大?。?/td> 0K
描述: IC AMP AUDIO PWR 2.3W AB 32TQFN
標(biāo)準(zhǔn)包裝: 60
系列: DirectDrive®
類型: AB 類
輸出類型: 2-通道(立體聲)帶立體聲耳機(jī)
在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量: 2.3W x 2 @ 3 歐姆; 130mW x 2 @ 16 歐姆
電源電壓: 4.5 V ~ 5.5 V
特點(diǎn): 消除爆音,短路保護(hù)和熱保護(hù),關(guān)機(jī),音量控制
安裝類型: 表面貼裝
供應(yīng)商設(shè)備封裝: 32-TQFN-EP(5x5)
封裝/外殼: 32-WFQFN 裸露焊盤
包裝: 管件
Analog Volume Control (VOL)
The MAX9756/MAX9757/MAX9758 feature an analog
volume control that varies the gain of the device in 31
discrete steps based upon the DC voltage applied to
VOL (see Table 4). The input range of VOL is from 0
(full volume) to HPVDD (full mute), with example step
sizes shown in Table 3. Connect the reference of the
device driving VOL (Figure 7) to HPVDD. Connect VOL
to GND (full volume) if volume control is not used.
MAX9756/MAX9757/MAX9758
2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
______________________________________________________________________________________
17
Table 4. Volume Levels
VVOL (V) = MULTIPLIER x
HPVDD
SPEAKER MODE
GAIN (dB)
HEADPHONE MODE
GAIN (dB)
MULTIPLIER
VVOL
(MIN)*
VVOL
(MAX)*
GAIN3 = 0
GAIN2 = 0
GAIN1 = 0
GAIN3 = 0
GAIN2 = 0
GAIN1 = 1
GAIN3 = 0
GAIN2 = 1
GAIN1 = 0
GAIN3 = 0
GAIN2 = 1
GAIN1 = 1
GAIN3 = 1
GAIN2 = 0
GAIN1 = 0
GAIN3 = 1
GAIN2 = 0
GAIN1 = 1
GAIN3 = 1
GAIN2 = 1
GAIN1 = 0
GAIN3 = 1
GAIN2 = 1
GAIN1 = 1
GAIN3 = X
GAIN2 = 0
GAIN1 = X
GAIN3 = X
GAIN2 = 1
GAIN1 = X
0.07
0.00
0.49
15
16.5
18
19.5
21
22.5
24
25.5
0
3
0.16
0.49
0.57
14
16
17.5
19
20
22
23.5
25
-1
2.5
0.18
0.57
0.64
13
15
17
18.5
19
21
23
24.5
-2
2
0.21
0.64
0.72
12
14
16.5
18
20
22.5
24
-3
1.5
0.23
0.72
0.80
10
13
16
17.5
16
19
22
23.5
-5
1
0.25
0.80
0.88
8
12
15
17
14
18
21
23
-7
0
0.28
0.88
0.95
6
10
14
16.5
12
16
20
22.5
-9
-1
0.30
0.95
1.03
4
8
13
16
10
14
19
22
-11
-2
0.32
1.03
1.11
2
6
12
15
8
12
18
21
-13
-3
0.35
1.11
1.19
0
4
10
14
6
10
16
20
-15
-5
0.37
1.19
1.26
-2
2
8
13
4
8
14
19
-17
-7
0.39
1.26
1.34
-4
0
6
12
2
6
12
18
-19
-9
0.42
1.34
1.42
-6
-2
4
10
0
4
10
16
-21
-11
0.44
1.42
1.50
-8
-4
2
8
-2
2
8
14
-23
-13
0.46
1.50
1.57
-10
-6
0
6
-4
0
6
12
-25
-15
0.49
1.57
1.65
-12
-8
-2
4
-6
-2
4
10
-27
-17
0.51
1.65
1.73
-14
-10
-4
2
-8
-4
2
8
-29
-19
0.54
1.73
1.80
-16
-12
-6
0
-10
-6
0
6
-31
-21
0.56
1.80
1.88
-18
-14
-8
-2
-12
-8
-2
4
-33
-23
0.58
1.88
1.96
-20
-16
-10
-4
-14
-10
-4
2
-35
-25
0.61
1.96
2.04
-22
-18
-12
-6
-16
-12
-6
0
-37
-27
0.63
2.04
2.11
-24
-20
-14
-8
-18
-14
-8
-2
-39
-29
0.65
2.11
2.19
-26
-22
-16
-10
-20
-16
-10
-4
-41
-31
0.68
2.19
2.27
-28
-24
-18
-12
-22
-18
-12
-6
-43
-33
0.70
2.27
2.35
-32
-26
-20
-14
-26
-20
-14
-8
-47
-35
0.72
2.35
2.42
-36
-28
-22
-16
-30
-22
-16
-10
-51
-37
0.75
2.42
2.50
-40
-32
-24
-18
-34
-26
-18
-12
-55
-39
0.77
2.50
2.58
-44
-36
-26
-20
-38
-30
-20
-14
-59
-41
0.79
2.58
2.66
-48
-40
-28
-22
-42
-34
-22
-15
-63
-43
0.82
2.66
2.73
-52
-44
-32
-24
-46
-38
-26
-18
-67
-47
0.84
2.73
2.81
-56
-48
-36
-26
-50
-42
-30
-20
-71
-51
0.93
2.81
3.30
MUTE
MAX9756
VREF
DAC
HPVDD
VOL
Figure 7. Volume Control Circuit
*Based on HPVDD = 3.3V.
X = Don’t care.
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