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TDA7493 Datasheet

3-watt + 3-watt dual BTL class-D audio amplifier

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TDA7493
3-watt + 3-watt dual BTL class-D audio amplifier
Features
„ 3.0 W + 3.0 W of continuous output power with
RL = 4 , THD = 10%, VCC = 5 V (filterless)
„ 2.8 W + 2.8 W of continuous output power with
RL = 4 , THD = 10%, VCC = 5 V (with filter)
„ Single supply voltage range 3.0 V to 5.5 V
„ High efficiency (η = 83%)
„ Four selectable, fixed gain settings of
6 dB, 12 dB, 15.6 dB and 18 dB
„ Differential inputs minimize common-mode
noise
„ Filterless operation
„ Standby feature
„ Short-circuit protection
„ Thermal-overload protection
„ Externally synchronizable
HTSSOP24 package with exposed pad down
Description
The TDA7493 is a dual BTL class-D audio
amplifier, specially designed for LCD TV, LCD
monitors or small speakers on cradles with
single-supply operation.
The filterless operation allows the external
component count to be reduced.
The TDA7493 is assembled in the HTSSOP24
package. Thanks to the high efficiency and to the
exposed-pad-down (EPD) package no separate
heatsink is required.
Table 1. Device summary
Order codes
Operating temperature
range
Package
TDA7493
0 to 70 °C
HTSSOP24 (EPD)
TDA749313TR
0 to 70 °C
HTSSOP24 (EPD)
Packaging
Tube
Tape and reel
November 2010
Doc ID 14570 Rev 6
1/30
www.st.com
30


STMicroelectronics Electronic Components Datasheet

TDA7493 Datasheet

3-watt + 3-watt dual BTL class-D audio amplifier

No Preview Available !

Contents
Contents
TDA7493
1 Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Pin-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Applications circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2 Gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.3 Input resistance and capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.4 Filterless modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.5 Internal clock and external clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.6 Output low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.7 Protection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.8 Differential input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.8.1 Single-ended input application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6 Electrical characterization curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1 For the configuration with LC filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2 For the configuration without filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 Heatsink provision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2/30 Doc ID 14570 Rev 6


Part Number TDA7493
Description 3-watt + 3-watt dual BTL class-D audio amplifier
Maker STMicroelectronics
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TDA7493 Datasheet PDF





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