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STMicroelectronics Electronic Components Datasheet

TDA7491P Datasheet

2 x 10-watt dual BTL class-D audio amplifier

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TDA7491P
2 x 10-watt dual BTL class-D audio amplifier
Features
10 W + 10 W continuous output power:
RL = 6 Ω, THD = 10% at VCC = 11 V
9.5 W + 9.5 W continuous output power:
RL = 8 Ω, THD = 10% at VCC = 12 V
Wide range single supply operation (5 V - 18 V)
High efficiency (η = 90%)
Four selectable, fixed gain settings of
nominally 20 dB, 26 dB, 30 dB and 32 dB
Differential inputs minimize common-mode
noise
Filterless operation
No ‘pop’ at turn-on/off
Standby and mute features
Short-circuit protection
Thermal overload protection
Externally synchronizable
PowerSSO-36 with
exposed pad down
Description
The TDA7491P is a dual BTL class-D audio
amplifier with single power supply designed for
LCD TVs and monitors.
Thanks to the high efficiency and
exposed-pad-down (EPD) package no separate
heatsink is required.
Furthermore, the filterless operation allows a
reduction in the external component count.
The TDA7491P is pin-to-pin compatible with the
TDA7491LP and TDA7491HV.
Table 1. Device summary
Order code
Operating temperature
Package
TDA7491P
-40 to 85 °C
PowerSSO-36 EPD
TDA7491P13TR
-40 to 85 °C
PowerSSO-36 EPD
Packaging
Tube
Tape and reel
January 2012
Doc ID 13540 Rev 6
1/42
www.st.com
42


STMicroelectronics Electronic Components Datasheet

TDA7491P Datasheet

2 x 10-watt dual BTL class-D audio amplifier

No Preview Available !

Contents
Contents
TDA7491P
1 Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Pin out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Characterization curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 With 4-Ω load at VCC = 10 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 With 6-Ω load at VCC = 11 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3 With 8-Ω load at VCC = 12 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1 Applications circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.3 Gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.4 Input resistance and capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.5 Internal and external clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.5.1 Master mode (internal clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.5.2 Slave mode (external clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.6 Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.6.1 Reconstruction low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.6.2 Filterless modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.7 Protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.8 Diagnostic output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.9 Heatsink requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.10 Test board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2/42 Doc ID 13540 Rev 6


Part Number TDA7491P
Description 2 x 10-watt dual BTL class-D audio amplifier
Maker STMicroelectronics
PDF Download

TDA7491P Datasheet PDF






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