TDA7492P
25 W + 25 W dual BTL class-D audio amplifier
Datasheet - production data
Description
The TDA7492P 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-paddown (EPD) package no heatsink is required.
PowerSSO-36
with exposed pad down
Features
25 W + 25 W continuous output power at
THD = 10% with VCC = 20 V and RL = 8
Wide-range single-supply operation (8 - 26 V)
High efficiency ( = 90%)
Four selectable, fixed gain settings of
nominally 21.6 dB, 27.6 dB, 31.1 dB and
33.6 dB
Differential inputs minimize common-mode
noise
Standby and mute features
Short-circuit protection
Thermal overload protection
Externally synchronizable
ECOPACK®, environmentally-friendly package
Table 1. Device summary
Order code
Operating temp. range
Package
Packaging
TDA7492P13TR
-40 to 85 °C
PowerSSO-36 EPD
Tape and reel
February 2014
This is information on a product in full production.
DocID15068 Rev 6
1/27
www.st.com
Contents
TDA7492P
Contents
1
Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
4
2.1
Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2
Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Characterization curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1
Characterizations for 6 loads with 18 V . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2
Characterizations for 8 loads with 20 V . . . . . . . . . . . . . . . . . . . . . . . . 13
5
Applications circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6
Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1
Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2
Gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.3
Input resistance and capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4
Internal and external clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.4.1
Master mode (internal clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.4.2
Slave mode (external clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.5
Output low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.6
Protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.7
Diagnostic output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2/27
DocID15068 Rev 6
TDA7492P
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pin description list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
How to set up SYNCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
PowerSSO-36 EPD dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
DocID15068 Rev 6
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27
List of figures
TDA7492P
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
4/27
Internal block diagram (showing one channel only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin connections (top view, PCB view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
THD at 1 kHz vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
THD at 100 Hz vs. output power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
THD at 1 W vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Crosstalk vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FFT 0 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FFT -60 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Output power vs supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
THD at 1 kHz vs output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
THD at 100 Hz vs output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
THD at 1 W vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Crosstalk vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
FFT 0 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
FFT -60 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Test board (SZ-LAB-TDA7492P) layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Applications circuit for class-D amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Standby and mute circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Turn-on/off sequence for minimizing speaker “pop” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Device input circuit and frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Master and slave connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Typical LC filter for a 8 speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Typical LC filter for a 4 speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Behavior of pin DIAG for various protection conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
PowerSSO-36 EPD outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
DocID15068 Rev 6
TDA7492P
1
Device block diagram
Device block diagram
Figure 1 shows the block diagram of one of the two identical channels of the TDA7492P.
Figure 1. Internal block diagram (showing one channel only)
DocID15068 Rev 6
5/27
27
Pin description
TDA7492P
2
Pin description
2.1
Pinout
Figure 2. Pin connections (top view, PCB view)
6/27
SUB_GND
1
36
VSS
OUTPB
2
35
SVCC
OUTPB
3
34
VREF
PGNDB
4
33
INNB
PGNDB
5
32
INPB
PVCCB
6
31
GAIN1
PVCCB
7
30
GAIN0
OUTNB
8
29
SVR
OUTNB
9
28
DIAG
OUTNA
10
27
SGND
OUTNA
11
26
VDDS
PVCCA
12
25
SYNCLK
PVCCA
13
24
ROSC
PGNDA
14
23
INNA
PGNDA
15
22
INPA
OUTPA
16
21
MUTE
OUTPA
17
20
STBY
PGND
18
19
VDDPW
Exposed pad down
(Connect to ground)
DocID15068 Rev 6
TDA7492P
2.2
Pin description
Pin list
Table 2. Pin description list
Pin n°
Name
Type
Description
1
SUB_GND
PWR
Connect to the frame
2,3
OUTPB
O
Positive PWM for right channel
4,5
PGNDB
PWR
Power stage ground for right channel
6,7
PVCCB
PWR
Power supply for right channel
8,9
OUTNB
O
Negative PWM output for right channel
10,11
OUTNA
O
Negative PWM output for left channel
12,13
PVCCA
PWR
Power supply for left channel
14,15
PGNDA
PWR
Power stage ground for left channel
16,17
OUTPA
O
Positive PWM output for left channel
18
PGND
PWR
Power stage ground
19
VDDPW
O
3.3-V (nominal) regulator output referred to ground for power stage
20
STBY
I
Standby mode control
21
MUTE
I
Mute mode control
22
INPA
I
Positive differential input of left channel
23
INNA
I
Negative differential input of left channel
24
ROSC
O
Master oscillator frequency-setting pin
25
SYNCLK
I/O
Clock in/out for external oscillator
26
VDDS
O
3.3-V (nominal) regulator output referred to ground for signal
blocks
27
SGND
PWR
Signal ground
28
DIAG
O
Open-drain diagnostic output
29
SVR
O
Supply voltage rejection
30
GAIN0
I
Gain setting input 1
31
GAIN1
I
Gain setting input 2
32
INPB
I
Positive differential input of right channel
33
INNB
I
Negative differential input of right channel
34
VREF
O
Half VDDS (nominal) referred to ground
35
SVCC
PWR
Signal power supply
36
VSS
O
3.3-V (nominal) regulator output referred to power supply
-
EP
PWR
Exposed pad for connection to ground plane as heatsink
DocID15068 Rev 6
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27
Electrical specifications
TDA7492P
3
Electrical specifications
3.1
Absolute maximum ratings
Table 3. Absolute maximum ratings
Symbol
3.2
Parameter
Value
Unit
VCCMAX
DC supply voltage for pins PVCCA, PVCCB, SVCC
30
V
VI
Voltage limits for input pins STANDBY, MUTE, INNA, INPA,
INNB, INPB, GAIN0, GAIN1
-0.3 to 3.6
V
Top
Operating temperature
-40 to 85
°C
Tj
Junction temperature
-40 to 150
°C
Tstg
Storage temperature
-40 to 150
°C
Thermal data
Table 4. Thermal data
Symbol
Parameter
Rth j-case
Thermal resistance, junction to case
Rth j-amb
Min
-
Thermal resistance, junction to ambient
Typ
2
-
24
(1)
Max
Unit
3
°C/W
-
°C/W
1. FR4 with vias to copper area of 9 cm2
3.3
Electrical specifications
Unless otherwise stated, the results in Table 5 below are given for the conditions:
VCC = 20 V, RL (load) = 8 , ROSC = R3 = 39 k, C8 = 100 nF, f = 1 kHz, GV = 21.6 dB, and
Tamb = 25 °C.
Table 5. Electrical specifications
Symbol
8/27
Parameter
Condition
Min
Typ
Max
Unit
VCC
Supply voltage for
pins PVCCA, PVCCB, SVCC
-
8
-
26
V
Iq
Total quiescent
-
-
26
35
mA
IqSTBY
Quiescent current in standby
-
-
2.5
5.0
µA
Play mode
-
-
±100
mV
VOS
Output offset voltage
Mute mode
-
-
±60
mV
IOCP
Overcurrent protection threshold RL = 0
3.8
4.2
-
A
TjSD
Junction temperature at thermal
shutdown
-
-
150
-
°C
Ri
Input resistance
Differential input
48
60
-
k
DocID15068 Rev 6
TDA7492P
Electrical specifications
Table 5. Electrical specifications (continued)
Symbol
Parameter
Condition
Min
Typ
Max
Unit
VOVP
Overvoltage protection threshold -
28
29
-
V
VUVP
Undervoltage protection
threshold
-
-
-
7
V
High side
-
0.2
-
RdsON
Power transistor on resistance
Low side
-
0.2
-
THD = 10%
-
25
-
Po
Output power
THD = 1%
-
20
-
9.5
-
Output power
VCC = 12 V, THD = 10%
-
Po
VCC = 12 V, THD = 1%
-
7.2
-
PD
Power dissipated by device
Po = 25 W + 25 W,
THD = 10%
-
5.0
-
W
Efficiency
Po = 10 W + 10 W
80
90
-
%
THD
Total harmonic distortion
Po = 1 W
-
0.1
0.4
%
GAIN0 = L, GAIN1 = L
20.6
21.6
22.6
GAIN0 = L, GAIN1 = H
26.6
27.6
28.6
GAIN0 = H, GAIN1 = L
30.1
31.1
32.1
GAIN0 = H, GAIN1 = H
32.6
33.6
34.6
GV
W
W
Closed-loop gain
dB
GV
Gain matching
-
-
-
±1
dB
CT
Cross talk
f = 1 kHz
-
50
-
dB
20
-
Total input noise
A Curve, GV = 20 dB
-
eN
f = 22 Hz to 22 kHz
-
25
35
µV
SVRR
Supply voltage rejection ratio
fr = 100 Hz, Vr = 0.5 V,
CSVR = 10 µF
40
50
-
dB
Tr, Tf
Rise and fall times
-
-
50
-
ns
fSW
Switching frequency
Internal oscillator
290
310
330
kHz
250
-
400
250
-
400
2.3
-
-
-
-
0.8
60
80
-
fSWR
Output switching frequency
range
VinH
Digital input high (H)
VinL
Digital input low (L)
AMUTE
Mute attenuation
With internal oscillator
(1)
With external oscillator
(2)
kHz
VMUTE = 1 V
V
dB
1. fSW = 106 / ((16 * ROSC + 182) * 4) kHz, fSYNCLK = 2 * fSW with R3 = 39 k, see Figure 20.
2. fSW = fSYNCLK / 2 with the frequency of the external oscillator.
DocID15068 Rev 6
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27
Characterization curves
4
TDA7492P
Characterization curves
The following characterizations were made using the SZ-LAB-TDA7492P demo board. The
layout is shown in Figure 19 on page 16. The LC filter for the 6 load used 22 µH and
220 nF components, whilst that for the 8 load used 33 µH and 220 nF.
4.1
Characterizations for 6 loads with 18 V
Figure 3. Output power vs. supply voltage
28
26
Vcc = 8 to 18 V,
24
RL = 6 Ω,
22
Rosc = 39 kΩ, Cosc = 100 nF,
20
Output power (W)
Test conditions:
f = 1 kHz,
Gv = 30 dB,
Tamb = 25r C
Specification limit:
THD = 10%
18
16
14
THD = 1%
12
10
8
Typical:
6
Vcc =18 V, RL = 6 Ω
4
Po = 25 W @THD = 10%
2
0
Po = 20 W @THD = 1%
8
9
10
11
12
13
14
15
16
17
18
Supply voltage (V)
Figure 4. THD at 1 kHz vs. output power
10
5
Test conditions:
Vcc = 18 V,
RL = 6 Ω,
Rosc = 39 kΩ, Cosc = 100 nF,
f = 1 kHz,
THD (%)
2
1
0.5
Gv = 30 dB,
Tamb = 25r C
0.2
0.1
0.05
Specification limit:
Typical:
0.02
Po = 25 W @THD = 10%
0.01
0.005
200m
500m
1
2
Output power (W)
10/27
DocID15068 Rev 6
5
10
20
30
TDA7492P
Characterization curves
Figure 5. THD at 100 Hz vs. output power
10
5
Test conditions:
THD (%)
Vcc = 18 V,
RL = 6 Ω,
2
Rosc = 39 kΩ, Cosc = 100 nF,
1
f = 100 Hz,
0.5
Gv = 30 dB,
Tamb = 25r C
0.2
0.1
0.05
Specification limit:
0.02
Typical:
0.01
Po = 25 W @THD = 10%
0.005
200m
500m
1
2
5
10
2k
5k
20
30
2XWSXWSRZHU:
Figure 6. THD at 1 W vs. frequency
0.5
Test conditions:
Vcc = 18 V,
THD (%)
RL = 6 Ω,
0.2
Rosc = 39 kΩ, Cosc = 100 nF,
f = 1 kHz,
0.1
Gv = 30 dB,
Po = 1 W
0.05
Tamb = 25r C
0.02
0.01
Specification limit:
Typical:
THD < 0.4%
0.005
20
50
100
200
500
1k
10k
20k
Frequency (Hz)
Figure 7. Frequency response
+2
Test conditions:
Vcc = 18 V,
RL = 6 Ω,
Ampl
Rosc = 39 kΩ, Cosc = 100 nF,
(dB)
+1
-0
f = 1 kHz,
Gv = 30 dB,
-1
Po = 1 W
Tamb = 25r C
-2
-3
Specification limit:
Max:
-4
+/-3 dB @20 Hz to 20 kHz
-5
10
20
50
100
200
500
1k
2k
5k
10k
30k
Frequency (Hz)
DocID15068 Rev 6
11/27
27
Characterization curves
TDA7492P
Figure 8. Crosstalk vs frequency
-60
Test conditions:
-65
Vcc = 18 V,
Crosstalk
RL = 6 Ω,
(dB)
-70
-75
Rosc = 39 kΩ, Cosc = 100 nF,
f = 1 kHz,
-80
Gv = 30 dB,
-85
Po = 1 W
-90
Tamb = 25r C
-95
-100
-105
Specification limit:
-110
Typical:
-115
> 50 dB @f = 1 kHz
-120
20
50
100
200
500
1k
2k
5k
10k
20k
Frequency (Hz)
Figure 9. FFT 0 dB
+10
Test conditions:
+0
FFT
-10
(dB)
-20
Vcc = 18 V,
RL = 6 Ω,
-30
Rosc = 39 kΩ, Cosc = 100 nF,
-40
f = 1 kHz,
-50
Gv = 30 dB,
-60
Po = 1 W
-70
Tamb = 25r C
-80
-90
-100
-110
Specification limit:
-120
Typical:
-130
> 60 dB for the harmonic frequency
-140
-150
20
50
100
200
500
1k
2k
5k
10k
Frequency (Hz)
Figure 10. FFT -60 dB
+0
-10
Test conditions:
Vcc = 18 V,
FFT
-20
RL = 6 Ω,
(dB)
-30
Rosc = 39 kΩ, Cosc = 100 nF,
-40
f = 1 kHz,
-50
Gv = 30 dB,
-60
Po = -60 dB @1 W = 0 dB
-70
Tamb = 25r C
-80
-90
-100
-110
Specification limit:
-120
Typical:
-130
> 90dB for the harmonic frequency
-140
-150
20
50
100
200
500
1k
Frequency (Hz)
12/27
DocID15068 Rev 6
2k
5k
10k
20k
20k
TDA7492P
Characterizations for 8 loads with 20 V
Figure 11. Output power vs supply voltage
28
Test conditions:
26
Vcc = 8 to 20 V,
24
RL = 8 Ω,
Output power (W)
4.2
Characterization curves
Rosc = 39 kΩ, Cosc = 100 nF,
f = 1 kHz,
Gv = 30 dB,
Tamb = 25r C
22
20
THD = 10%
18
16
14
12
THD = 1%
10
Specification limit:
8
Typical:
6
Vs = 20 V, RL = 8 Ω
4
Po = 25 W @THD = 10%
2
8
Po = 20 W @THD = 1%
9
10
11
12
13
14
15
16
17
18
19
20
Supply voltage (V)
Figure 12. THD at 1 kHz vs output power
10
Test conditions:
Vcc = 20 V,
RL = 8 Ω,
Rosc = 39 kΩ, Cosc = 100 nF,
5
THD (%)
2
1
f = 1 kHz,
0.5
Gv = 30 dB,
Tamb = 25r C
0.2
0.1
0.05
Specification limit:
Typical:
0.02
Po = 25 W @THD = 10%
0.01
0.005
100m
200m
500m
1
2
5
10
20
30
Output power (W)
DocID15068 Rev 6
13/27
27
Characterization curves
TDA7492P
Figure 13. THD at 100 Hz vs output power
10
Test conditions:
5
THD (%)
Vcc = 20 V,
RL = 8 Ω,
2
Rosc = 39 kΩ, Cosc = 100 nF,
1
f = 100 Hz,
0.5
Gv = 30 dB,
Tamb = 25r C
0.2
0.1
0.05
Specification limit:
0.02
Typical:
0.01
Po = 25 W @THD = 10%
0.005
100m
200m
500m
1
2
5
10
20
30
Output power (W)
Figure 14. THD at 1 W vs frequency
0.5
Test conditions:
Vcc = 20 V,
RL = 8 Ω,
Rosc = 39 kΩ, Cosc = 100 nF,
0.2
THD (%)
f = 1 kHz,
0.1
Gv = 30 dB,
Po = 1 W
0.05
Tamb = 25r C
0.02
Specification Limit:
0.01
Typical:
THD < 0.4%
0.005
20
50
100
200
500
1k
2k
5k
10k
20k
Frequency (Hz)
Figure 15. Frequency response
+2
Test conditions:
Vcc = 20 V,
RL = 8 Ω,
Rosc = 39 kΩ, Cosc = 100 nF,
f = 1 kHz,
+1
Ampl
(dB)
-0
Gv = 30 dB,
-1
Po = 1 W
Tamb = 25r C
-2
-3
Specification limit:
Max:
-4
+/-3 dB @20 Hz to 20 kHz
-5
10
20
50
100
200
500
1k
Frequency (Hz)
14/27
DocID15068 Rev 6
2k
5k
10k
20k 30k
TDA7492P
Characterization curves
Figure 16. Crosstalk vs frequency
-60
Test conditions:
TTTTTTTTTTT TTTT T TTTTT
-65
Vcc = 20 V,
Crosstalk
RL = 8 Ω,
(dB)
-70
-75
Rosc = 39 kΩ, Cosc = 100 nF,
f = 1 kHz,
-80
Gv = 30 dB,
-85
Po = 1 W
-90
Tamb = 25r C
-95
-100
-105
Specification limit:
-110
Typical:
-115
> 50 dB @f = 1 kHz
-120
20
50
100
200
500
1k
2k
5k
10k
20k
2k
5k
10k
20k
5k
10k
20k
Frequency (Hz)
Figure 17. FFT 0 dB
+10
Test conditions:
+0
Vcc = 20 V,
FFT
RL = 8 Ω
(dB)
-10
-20
Rosc = 39 kΩ, Cosc = 100 nF,
-30
f = 1 kHz,
-40
-50
Gv = 30 dB,
-60
Po = 1 W
-70
Tamb = 25r C
-80
-90
-100
-110
Specification limit:
-120
Typical:
-130
> 60 dB for the harmonic frequency
-140
-150
20
50
100
200
500
1k
Frequency (Hz)
Figure 18. FFT -60 dB
+0
Test conditions:
Vcc = 20 V,
RL = 8 Ω,
Rosc = 39 kΩ, Cosc = 100 nF,
-10
FFT
(dB)
-20
-30
-40
f = 1 kHz,
-50
Gv = 30 dB,
-60
Po = -60 dB (1 W = 0 dB)
-70
Tamb = 25r C
-80
-90
-100
Specification limit:
Typical:
> 90 dB for the harmonic frequency
-110
-120
-130
-140
-150
20
50
100
200
500
1k
2k
Frequency (Hz)
DocID15068 Rev 6
15/27
27
Characterization curves
TDA7492P
2. Test Board
Figure 19. Test board (SZ-LAB-TDA7492P) layout
16/27
DocID15068 Rev 6
Applications circuit
TDA7492P
5
Figure 20. Applications circuit for class-D amplifier
&
Q)
& Q)
6*1'
&
Q)
& Q)
6*1'
Jumper settings for gain:
68%B*1'
2873$
/
,13$
2873$
X+
,11$
9''6
&
Q)
5 N
0V:0V
21.6 dB
0 V : 3.3 V
27.6 dB
5
6LQJOH(QGHG
',$*
-
5
-
&
9''6
Q)
',$*
39&&$
/
2871$
DocID15068 Rev 6
31.1 dB
3.3 V : 3.3 V
33.6 dB
6