ST TDA7493 User Manual
3-watt + 3-watt dual BTL class-D audio amplifier
Features
3.0 W + 3.0 W of continuous output power with
R
=4Ω, THD = 10%, VCC = 5 V (filterless)
L
2.8 W + 2.8 W of continuous output power with
R
=4Ω, THD = 10%, VCC = 5 V (with filter)
L
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
Table 1. Device summary
TDA7493
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.
Order codes
TDA7493 0 to 70 °C HTSSOP24 (EPD) Tube
TDA749313TR 0 to 70 °C HTSSOP24 (EPD) Tape and reel
November 2010 Doc ID 14570 Rev 6 1/30
Operating temperature
range
Package Packaging
www.st.com
30
Contents TDA7493
Contents
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
TDA7493 List of figures
List of figures
Figure 1. TDA7493 block diagram (only one of two channels shown) . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. Input high-pass RC filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 5. Device input structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6. Unipolar PWM output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7. Schematic for the filterless configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 8. Master and slave modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9. Typical LC filter for 8 Ω speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 10. Typical LC filter for 4 Ω speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 11. Differential input application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 12. Single-ended input application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 13. Anti-pop configuration for single-ended input application . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 14. Simple anti-pop configuration for single-ended input application . . . . . . . . . . . . . . . . . . . . 19
Figure 15. THD vs output power at 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 16. THD vs output power at 100 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 17. THD vs frequency at 100 mW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 18. THD vs frequency at 1 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 19. Output frequency response at 1 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 20. Crosstalk vs frequency at 1 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 21. FFT (0 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 22. FFT (-60 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 23. THD vs output power at 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 24. THD vs output power at 100 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 25. THD vs frequency at 100 mW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 26. THD vs frequency at 1 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 27. Frequency response at 1 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 28. Crosstalk vs frequency at 1 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 29. FFT (0 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 30. FFT (-60 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 31. HTSSOP24 EPD outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Doc ID 14570 Rev 6 3/30
List of tables TDA7493
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Absolute maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 7. Gain selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 8. Resistance values for input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 9. Master and slave mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 10. HTSSOP24 EPD dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 11. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4/30 Doc ID 14570 Rev 6
TDA7493 Device block diagram
1 Device block diagram
Figure 1 shows the block diagram of one of the two identical channels of the TDA7493.
Figure 1. TDA7493 block diagram (only one of two channels shown)
STANDBYSVRSVCC
SGND
PVCCP
ROSC
INP
INN
GAIN0
GAIN1
SYNCLK
OUTP
PGNDP
PVCCN
OUTN
PGNDN
Doc ID 14570 Rev 6 5/30
Pin description TDA7493
2 Pin description
2.1 Pin-out
Figure 2. Pin connection (top view)
SVR
24
23
22
21
20
19
18
17
16
15
14
13
1
INNL
2
INPL
3
STANDBY
4
PVCCPL
5
OUTPL
6
PGNDPL
7
PGNDNL
8
OUTNL
9
PVCCNL
10
SYNCLK
11
ROSC
12
SGND
The exposed pad is the device ground and must be connected appropriately
Exposed
pad (GND)
INNR
INPR
PVCCPR
OUTPR
PGNDPR
PGNDNR
OUTNR
PVCCNR
GAIN1
GAIN0
SVCC
6/30 Doc ID 14570 Rev 6
TDA7493 Pin description
2.2 Pin list
Table 2. Pin list
Number Name Type Description
1 INNL IN Negative differential input of left channel
2 INPL IN Positive differential input of left channel
Standby mode control (digital):
3 STANDBY IN
4 PVCCPL POWER Power supply for positive branch in left channel
5 OUTPL OUT Positive PWM output for left channel
6 PGNDPL POWER Power stage ground for left channel
7 PGNDNL POWER Power stage ground for left channel
8 OUTNL OUT Negative PWM output for left channel
9 PVCCNL POWER Power supply for negative branch in left channel
10 SYNCLK IN/OUT Clock in/out for external oscillator
11 ROSC OUT Master oscillator frequency setting pin
12 SGND POWER Signal ground
13 SVCC POWER Signal power supply
0: standby
1: play
14 GAIN0 IN Gain setting input 1
15 GAIN1 IN Gain setting input 2
16 PVCCNR POWER Power supply for negative branch in right channel
17 OUTNR OUT Negative PWM output for right channel
18 PGNDNR POWER Power stage ground for right channel
19 PGNDPR POWER Power stage ground for right channel
20 OUTPR OUT Positive PWM output for right channel
21 PVCCPR POWER Power supply for positive branch in right channel
22 SVR OUTPUT Supply voltage rejection
23 INPR IN Positive differential input of right channel
24 INNR IN Negative differential input of right channel
Doc ID 14570 Rev 6 7/30
8/30 Doc ID 14570 Rev 6
3 Applications circuit
Figure 3. Typical application circuit
Applications circuit TDA7493
Jumper 5 for
single-ended
input
Jumper 6 for
single-ended
input
SVCC
STANDBY
INPL
INNL
ROSC
GAIN0
GAIN1
SYNCLK
INPR
INNR
SVR
SGND
TDA7493
PVCCPL
OUTPL
PGNDPL
PVCCNL
OUTNL
PGNDNL
PVCCPR
OUTPR
PGNDPR
PVCCNR
OUTNR
PGNDNR
TDA7493 Electrical specifications
4 Electrical specifications
4.1 Absolute maximum ratings
Table 3. Absolute maximum rating
Symbol Parameter
V
CC
V
CC_STANDBY
Vi
DC supply on pins PVCCPL, PVCCPR, PVCCNL,
PVCCNR, SVCC
Standby DC supply on pins PVCCPL, PVCCPR,
PVCCNL, PVCCNR, SVCC
Input on pins STANDBY, INNL, INPL, INNR, INPR,
GAIN0, GAIN1
Top Operating temperature 0 70 °C
Tstg, Tj Storage and junction temperature -40 150 °C
4.2 Thermal data
Table 4. Thermal data
Symbol Parameter Min Typ Max Unit
Rth j-case Thermal resistance junction to case - 2 3 °C/W
Rth j-amb
1. FR4 with via holes, copper area 9 cm² as explained in Chapter 8 on page 28.
Thermal resistance junction to ambient
(on recommended PCB)
(1)
Negative
value
Positive
value
Unit
-0.3 6 V
-0.3 7 V
-0.3 6 V
-37-°C/W
4.3 Electrical characteristics
Refer to Figure 3: Typical application circuit, VCC = 5 V, RL (load) = 4 Ω, R1 = 39 kΩ,
C4 = 100 nF, f = 1 kHz, G
Table 5. Electrical characteristics
Symbol Parameter Condition Min Typ Max Unit
V
CC
Iq Total quiescent current No filter, no load - 7 - mA
Vos Output offset voltage Vi = 0, Gv = 6 dB, no load -20 - 20 mV
Po
Po
Supply range - 3.0 - 5.5 V
Output power
(filterless)
Output power (with
filter)
= 18 dB, Tamb = 25 °C, unless otherwise specified.
V
Doc ID 14570 Rev 6 9/30
THD = 10% - 3.0 - W
THD = 1% -2.4-W
THD = 10% - 2.8 - W
THD = 1% -2.2-W
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