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TPA711 Datasheet

  • TPA711

  • 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

  • 32頁

  • TI

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TPA711
700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
SLOS230B 鈥?NOVEMBER 1998 鈥?REVISED MARCH 2000
D
D
D
D
Fully Specified for 3.3-V and 5-V Operation
Wide Power Supply Compatibility
2.5 V 鈥?5.5 V
Output Power
鈥?700 mW at V
DD
= 5 V, BTL, R
L
= 8
鈩?/div>
鈥?85 mW at V
DD
= 5 V, SE, R
L
= 32
鈩?/div>
鈥?250 mW at V
DD
= 3.3 V, BTL, R
L
= 8
鈩?/div>
鈥?37 mW at V
DD
= 3.3 V, SE, R
L
= 32
鈩?/div>
Shutdown Control
鈥?I
DD
= 7
碌A
at 3.3 V
鈥?I
DD
= 50
碌A
at 5 V
D
D
D
D
BTL to SE Mode Control
Integrated Depop Circuitry
Thermal and Short-Circuit Protection
Surface-Mount Packaging
鈥?SOIC
鈥?PowerPAD鈩?MSOP
D OR DGN PACKAGE
(TOP VIEW)
description
SHUTDOWN
BYPASS
SE/BTL
IN
1
2
3
4
8
7
6
5
The TPA711 is a bridge-tied load (BTL) or
single-ended (SE) audio power amplifier devel-
oped especially for low-voltage applicationswhere internal speakers and external earphone operation are
required. Operating with a 3.3-V supply, the TPA711 can deliver 250-mW of continuous power into a BTL 8-鈩?/div>
load at less than 0.6% THD+N throughout voice band frequencies. Although this device is characterized out
to 20 kHz, its operation was optimized for narrower band applications such as wireless communications. The
BTL configuration eliminates the need for external coupling capacitors on the output in most applications, which
is particularly important for small battery-powered equipment. A unique feature of the TPA711 is that it allows
the amplifier to switch from BTL to SE
on the fly
when an earphone drive is required. This eliminates complicated
mechanical switching or auxiliary devices just to drive the external load. This device features a shutdown mode
for power-sensitive applications with special depop circuitry to eliminate speaker noise when exiting shutdown
mode. The TPA711 is available in an 8-pin SOIC and the surface-mount PowerPAD MSOP package, which
reduces board space by 50% and height by 40%.
V
O
鈥?/div>
GND
V
DD
V
O
+
VDD 6
RF
Audio
Input
RI
CI
2
CB
BYPASS
4
IN
VDD/2
VO+ 5
CS
鈥?/div>
+
VDD
鈥?/div>
+
From System Control
From HP Jack
1
3
SHUTDOWN
SE/BTL
Bias
Control
VO鈥?8
7
GND
700 mW
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
漏
2000, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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