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參數(shù)資料
| 型號(hào)： | MAX4411BETP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 80mW, Fixed-Gain, DirectDrive, Stereo Headphone Amplifier with Shutdown |
| 中文描述： | 0.08 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC20 |
| 封裝： | 4 X 4 MM, 0.80 MM HEIGHT, MO-220WGGD-1, QFN-20 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大?。?/td> | 623K |
| 代理商： | MAX4411BETP |
M
80mW, Fixed-Gain, DirectDrive, Stereo
Headphone Amplifier with Shutdown
______________________________________________________________________________________
13
output ripple. Likewise, decreasing the ESR of C2
reduces both ripple and output resistance. Lower
capacitance values can be used in systems with low
maximum output power levels. See the Output Power
vs. Charge-Pump Capacitance and Load Resistance
graph in the
Typical Operating Characteristics.
Power-Supply Bypass Capacitor
The power-supply bypass capacitor (C3) lowers the out-
put impedance of the power supply, and reduces the
impact of the MAX4411
’
s charge-pump switching tran-
sients. Bypass PV
DD
with C3, the same value as C1, and
place it physically close to the PV
DD
and PGND pins.
Adding Volume Control
The addition of a digital potentiometer provides simple
volume control. Figure 6 shows the MAX4411 with the
MAX5408 dual log taper digital potentiometer used as
an input attenuator. Connect the high terminal of the
MAX5408 to the audio input, the low terminal to
ground, and the wiper to C
IN
. Setting the wiper to the
top position passes the audio signal unattenuated.
Setting the wiper to the lowest position fully attenuates
the input.
Layout and Grounding
Proper layout and grounding are essential for optimum
performance. Connect PGND and SGND together at a
single point on the PC board. Connect all components
associated with the charge pump (C2 and C3) to the
PGND plane. Connect PV
DD
and SV
DD
together at the
device. Connect PV
SS
and SV
SS
together at the
device. Bypassing of both supplies is accomplished by
charge-pump capacitors C2 and C3 (see
Typical
Application Circuit
). Place capacitors C2 and C3 as
close to the device as possible. Route PGND and all
traces that carry switching transients away from SGND
and the traces and components in the audio signal
path.
The QFN package features an exposed paddle that
improves thermal efficiency of the package. However,
the MAX4411 does not require additional heatsinking.
Ensure that the exposed paddle is isolated from
GND or V
DD
. Do not connect the exposed paddle to
GND or V
DD
.
When using the MAX4411 in a UCSP package, make
sure the traces to OUTR (bump C2) are wide enough to
handle the maximum expected current flow. Multiple
traces may be necessary.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, printed circuit
board techniques, bump-pad layout, and recommend-
ed reflow temperature profile, as well as the latest infor-
mation on reliability testing results, go to Maxim
’
s
website at www.maxim-ic.com/ucsp and look up the
Application Note:
UCSP–A Wafer-Level Chip-Scale
Package
.
Table 1. Suggested Capacitor Manufacturers
SUPPLIER
PHONE
800-348-2496
847-803-6100
FAX
WEBSITE
Taiyo Yuden
TDK
847-925-0899
847-390-4405
www.t-yuden.com
www.component.tdk.com
Note:
Please indicate you are using the MAX4411 when contacting these component suppliers.
OUTL
MAX4411
INL
13
MAX5408
H0
L0
5
6
W0A
7
LEFT AUDIO
INPUT
15
W1A
10
C
IN
C
IN
RIGHT AUDIO
INPUT
INR
OUTR
11
9
H1
L1
12
11
Figure 6. MAX4411 and MAX5408 Volume Control Circuit
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| MAX4411BETP+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.08W CLS-AB 20TQFN - Rail/Tube |
| MAX4411BETP+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.08W CLS-AB 20TQFN - Tape and Reel |
| MAX4411EBE | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX4411EBE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX4411EBE+G45 | 制造商:Maxim Integrated Products 功能描述: |
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