STMICROELECTRONICS TDA7490L

TDA7490L
®
15W + 15W STEREO CLASS-D AMPLIFIER
28W MONO IN BTL
15W + 15W OUTPUT POWER:
RL = 8Ω/4Ω; THD = 10%
HIGH EFFICIENCY
WIDE SUPPLY VOLTAGE RANGE (FROM
±10 TO ±25V)
SPLIT SUPPLY
TURN OFF/ON POP FREE
ST-BY AND MUTE FEATURES
SHORT CIRCUIT PROTECTION ACROSS
THE LOAD
THERMAL OVERLOAD PROTECTION
EXTERNALLY SINCHRONIZABLE
BRIDGE CONFIGURATION
Flexiwatt 25
ORDERING NUMBER: TDA7490L
DESCRIPTION
The TDA7490L is a dual audio class D amplifier
assembled in Flexiwatt 25 package; it is specially
designed for high efficiency application mainly for
TV and Home Stereo sets.
Figure 1. Test and application circuit. (Stereo Configuration)
R1 10K
R17 52.3K
MUTE
STBY
R2
30K
R3
10K
R21 4.7K
C26 470pF C25 470pF
7
6
INPUT1
9
10
PREAMPLIFIER1
C23
2200µF
14
+VCC
C22
100nF
2
C21
2200µF
R15
100
5
INTEGRATOR1
3
12
C3
100nF
-VCC
L1 30µ
C18 330pF
OUT1
C10
220nF
8
OSC
EXT_CK
C17
24pF
1
C7 100nF
-VCC
C19
560pF
R14 22K
16
R1 10K
C20
33nF
11
13
C4
100nF
-VCC
4
PWM-stage1
G=2.5
C2
1nF
-VCC
R4
130K
R20
68K
C27
2.2µF
C1 330nF
+VCC
15
R13
10K
C16 330pF
25
R 6.8
C5 330nF
INPUT2
C6
1nF
PREAMPLIFIER2
18
PWM-stage2
G=2.5
19
R5 4.7K
23
INTEGRATOR2
17
21
20
24
22
L2 30µ
R12 22K
C15
560pF
C14
33nF
OUT2
C29
220nF
R11
100
C8 470pF
-VCC
R6
68K
C9 470pF
C28
2200µF
-VCC
C11
100nF
C12
2200µF
+VCC
D98AU978A
R9 52.3K
March 2001
1/9
TDA7490L
Figure 2. Test and application circuit. (Bridge Configuration)
470pF
C40
C41
R4
68K
7
INPUT
R5 52.3K
470pF
The LC filter is optimized for 8Ω
(<->LC filter for 4Ω in single-ended)
It hos to be changed for other loads
9
-
10
PRE
L9 30µ
Int.
PWM-stage
+
3
C23
235nF
C26
470nF
dumping
(common
mode)
R27
10
R63
4.7K
C24
235nF
18
PRE
+
PWM-stage
Int.
23
-
19
470pF
C60 R61
68K
R25
Rload
R28
10
C29
470nF
L10 30µ
17
470pF
C59
R62 52.3K
D99AU1081
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
DC Supply Voltage (no signal)
±30
V
Ptot
Tstg, Tj
Power Dissipation Tcase = 70°C
35
W
Top
V6,8,10,18
Storage and Junction Temperature
–40 to 150
°C
0 to 70
°C
V
Operating Temperature Range
Maximum Voltage on pins # 6,8,10,18 referred to GND
±5
THERMAL DATA
Symbol
Rth j-case
2/9
Parameter
Thermal Resistance Junction-case
Typ.
1
Max.
Unit
°C/W
TDA7490L
PIN CONNECTION (Top view)
Vreg
-VCC
+VCC
OUT2
N.C.
BOOT2
IN2
FEED4
FEED3
T2
-5V
GND
CURREF
T1
+5V
IN1
OSC
FEED2
FEED1
STBY-MUTE
+VCC
BOOT1
-VCC
25
OUT1
-VCC
1
D97AU816B
PIN FUNCTIONS
N.
Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
-VCC sign/sub
-VCCpow1
out 1
+VCCpow1
BOOT1
STBY-MUTE
FEED1
OSC
FEED2
IN1
T1
+5V
GND
CURREF
T2
-5V
FEED3
IN2
FEED4
NC
BOOT2
+VCCpow2
OUT2
-VCCpow2
Vreg
Function
Negative signal/substrate supply
Negative power supply CH1
PWM output of CH1
Positive power supply CH1
Bootstrap CH1
Control State Pin
Feedback pin 1 CH1
Master Oscillator Setting Freequency Pin (or external sync.)
Feedback pin2 CH1
Input CH1
Triangular waveform CH1
+5V regulator (only for internal purposes)
Signal ground
Setting current resistor
Triangular waveform CH2
-5V regulator (only for internal purposes)
Feedback pin1 CH2
Input CH2
Feedback pin2 CH2
Not connected
Bootstrap CH2
Positive power supply CH2
PWM output of CH2
Negative power supply CH2
10V regulator
3/9
TDA7490L
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±17V; RL = 8Ω; Demod. filter L =
30mH, C = 220nF; f = 1KHz; fsw = 200kHz; Tamb = 25°‘C unless otherwise specified.)
Symbol
Parameter
Test Condition
Supply Range
Iq
VOS
Total Quiescent Current
PO
Output Power
THD = 10%
THD = 1%
Output Power in Bridge
Configuration
PO(BTL)
PO (1)
Min.
Typ.
±10
VS
RL = ∞ no LC filter
Output Offset Voltage
70
–150
12
10
Unit
±25
V
120
mA
+150
mV
15
12
W
W
Vs =±17V; RL = 16Ω
THD = 10%
THD = 1%
28
22.5
W
W
Vs =±13V; RL = 8Ω
THD = 10%
THD = 1%
28
22.5
W
W
15
12
W
W
RL = 4Ω VCC = ±13V
THD = 10%
THD = 1%
Output Power
Max.
PD
Maximum Dissipated Power
VCC = ±17V; RL = 8Ω
PO = 15W + 15W; THD = 10%
4
W
η
Efficiency (*)
PO = 15W + 15W
86
%
Total Harmonic Distortion
Overcurrent Protection
Threshold
RL = 8Ω; PO = 1W
RL = 0
0.1
%
5
A
150
°C
THD
Imax
3.5
Tj
Thermal Shut-down Junction
Temperature
GV
Closed Loop Gain
29
∆GV (3)
eN
Gain Matching
Total Input Noise
RG = 50Ω
-1
A Curve
f = 20Hz to 22KHz
7
12
µV
µV
Cross talk
f = 1KHz, PO = 1W
55
dB
30
kΩ
CT
Ri
Input Resistance
SVR
Supply Voltage Rejection
Vrmax
Tr, Tf
Overvoltage Threshold (5)
Rising and Falling Time
RDSON
FSW (4)
20
f = 100Hz; Vr = 0.5
30
dB
dB
60
55
50
Power Transistor on Resistance
Switching Frequency Range
31
+1
100
dB
60
70
V
ns
0.4
0.8
200
230
Ω
KHz
MUTE & STAND-BY FUNCTIONS
VST-BY
Stand-by range
0
0.7
V
VMUTE
Mute Range
1.7
2.5
V
VPLAY
AMUTE
Play Range
Mute Attenuation
4
55
5
V
dB
IqST-BY
Quiescent Current @ Stand-by
5
mA
*: PO = measured across the load using the following inductor:
COIL58120 MPPA 2 (magnectics) TURNS = 20 ø 1mm
(1) L = 15µH, C = 470nF
(3) ∆Gv is intended with R2, R17, R5, R9 1% precision
(4) FSW = 0.25 ⋅ (1/(300ns + R13 ⋅ ( C17 + 76pF) ⋅ 0.85)
(5) VRMAX = (+VCC) - (-VCC) when VR ≥VRMAX the device goes in Stand-By mode
4/9
60
3
TDA7490L
Figure 3. P.C. Board and component layout of the Figs. 1, 2.
(for Stereo and Bridge compatible configuration)
C
O
M
P
O
N
E
N
T
S
I
D
E
S
O
L
D
E
R
S
I
D
E
5/9
TDA7490L
Figure 4. Distortion vs. Output Power
Figure 5. Distortion vs. Output Power
5
5
Stereo
VS ± 17V; Rl=8Ω;
f=1KHz
2
1
0.5
0.5
0.2
0.2
0.1
0.1
0.05
0.05
0.02
0.02
0
2
4
6
8
10
12
14
PO(W)
Figure 6. Crosstalk vs. Frequency
0.01
0
2
4
6
8
10
12
14
PO(W)
Figure 7. Frequency Response
D99AU1102
CT
(dB)
VS ± 17V;
Rl=8Ω;
0dB=1W
-20
Stereo
VS ± 13V; Rl=4Ω;
f=1KHz
2
1
0.01
D99AU1084
THD
(%)
D99AU1086
THD
(%)
AMP
(dB)
D99AU1103
2
0
-30
-2
-40
VS= ±17V;
Rl= 8Ω;
0dB= 1W
-4
-50
-6
-60
-70
-8
-80
-10
-90
-12
-100
0.001
0.01
0.1
1
f(KHz)
Figure 8. Power Dissipation vs. Output Power
Ptot
(W)
D99AU1087
7
VS= ±17V;
Rl= 8Ω;
f= 1KHz
6
-14
0.01
0.1
1
10
f(KHz)
Figure 9. Distortion vs. Output Power in BTL
D99AU1104
THD
(%)
5
Bridge
VS ± 13V;
Rl=8Ω;
f=1KHz
2
1
5
0.5
4
0.2
3
0.1
2
0.05
1
0
6/9
0.02
0
2
4
6
8
10
12
14 PO(W)
0.01
0
5
10
15
20
25
PO(W)
TDA7490L
Figure 10. Distortion vs. Output Power in BTL
D99AU1105
THD
(%)
5
Bridge
VS ± 17V;
Rl=16Ω;
f=1KHz
2
1
0.5
0.2
0.1
0.05
0.02
0.01
0
5
10
15
20
25
PO(W)
7/9
TDA7490L
DIM.
A
B
C
D
E
F (1)
G
G1
H (2)
H1
H2
H3
L (2)
L1
L2 (2)
L3
L4
L5
M
M1
N
O
R
R1
R2
R3
R4
V
V1
V2
V3
MIN.
4.45
1.80
0.75
0.37
0.80
23.75
28.90
22.07
18.57
15.50
7.70
3.70
3.60
mm
TYP.
4.50
1.90
1.40
0.90
0.39
1.00
24.00
29.23
17.00
12.80
0.80
22.47
18.97
15.70
7.85
5
3.5
4.00
4.00
2.20
2
1.70
0.5
0.3
1.25
0.50
MAX.
4.65
2.00
MIN.
0.175
0.070
1.05
0.42
0.57
1.20
24.25
29.30
0.029
0.014
22.87
19.37
15.90
7.95
0.869
0.731
0.610
0.303
4.30
4.40
0.145
0.142
0.031
0.935
1.138
inch
TYP.
0.177
0.074
0.055
0.035
0.015
0.040
0.945
1.150
0.669
0.503
0.031
0.884
0.747
0.618
0.309
0.197
0.138
0.157
0.157
0.086
0.079
0.067
0.02
0.12
0.049
0.019
MAX.
0.183
0.079
OUTLINE AND
MECHANICAL DATA
0.041
0.016
0.022
0.047
0.955
1.153
0.904
0.762
0.626
0.313
0.169
0.173
5˚ (Typ.)
3˚ (Typ.)
20˚ (Typ.)
45˚ (Typ.)
Flexiwatt25
(1): dam-bar protusion not included
(2): molding protusion included
H
H1
V3
A
H2
O
H3
R3
L4
R4
V1
R2
L2
N
L3
R
L
L1
V1
V2
R2
D
R1
L5
R1
R1
E
G
G1
F
V
M
B
C
V
FLEX25ME
8/9
M1
TDA7490L
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 2001 STMicroelectronics – Printed in Italy – All Rights Reserved
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