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PDF TDA7491MV Data sheet ( Hoja de datos )
| Número de pieza | TDA7491MV | |
| Descripción | 25W mono BTL class-D audio amplifier | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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TDA7491MV
25 W mono BTL class-D audio amplifier
Features
■ 20 W continuous output power:
RL = 8 Ω, THD = 10% at VCC = 18 V
■ 25 W continuous output power:
RL = 6 Ω, THD = 10% at VCC = 16 V
■ Wide range single supply operation (5 V - 18 V)
■ High efficiency (η= 90%)
■ Four selectable, fixed gain settings of 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 (or slug) down
Description
The TDA7491MV is a dual BTL class-D audio
amplifier with single power supply designed for
LCD TVs and monitors.
Thanks to the high efficiency and slug-down
package no heatsink is required.
Furthermore, the filterless operation allows a
reduction in the external component count.
TDA7491MV is pin to pin compatible to
TDA7491LP, TDA7491P, TDA7491HV (please
refer to Application circuit on page 15 for further
details).
Table 1. Device summary
Order codes
Operating Temp. range
Package
TDA7491MV
0 °C to 70 °C
PowerSSO-36 (slug down)
TDA7491MV13TR
0 °C to 70 °C
PowerSSO-36 (slug down)
Packing
Tube
Tape and reel
October 2008
Rev 1
1/24
www.st.com
24
1 page  
TDA7491MV
Pin description
2.2
Pin list
Table 2. Pin description list
Number
Name
Type
1 SUB_GND POWER
2,3 NA
NA
4,5 NA
NA
6,7 NA
8,9 NA
NA
NA
10,11 OUTNA
OUT
12,13 PVCCA
POWER
14,15 PGNDA
POWER
16,17
18
OUTPA
PGND
OUT
POWER
19 VDDPW OUT
20 STBY
INPUT
21 MUTE
INPUT
22 INPA
INPUT
23 INNA
INPUT
24 ROSC
OUT
25 SYNCLCK IN/OUT
26 VDDS
OUT
27 SGND
28 DIAG
29 SVR
30 GAIN0
31 GAIN1
32 VDDS
33 SGND
34 VREF
35 SVCC
36 VSS
POWER
OUT
OUT
INPUT
INPUT
POWER
POWER
OUT
POWER
OUT
Description
Connect to the frame
NA
NA
NA
NA
Negative PWM output for right channel
Power supply for left channel
Power stage round for left channel
Positive PWM output for left channel
Power stage round
3.3 V (nominal) regulator output referred to ground for power
stage
Standby mode control
Mute mode control
Positive differential input of left channel
Negative differential input of left channel
Master oscillator frequency-setting pin
Clock in/out for external oscillator
3.3 V (nominal) regulator output referred to gnd for signal
blocks
Signal Ground
Open-drain diagnostic output
Supply voltage rejection
Gain setting input 1
Gain setting input 2
To be connected to VDD signal
Signal Ground
Half VDDS (nominal) referred to ground
Signal power supply
3.3 V (nominal) regulator output referred to power supply
5/24
5 Page 
TDA7491MV
Characterization curves
Figure 9. FFT (-60 dB)
Test Condition:
Vcc =18V,
RL= 8 ohm,
Rosc =39kΩ, Cosc =100nF,
f =1kHz,
Gv =30dB,
Po = -60dB (@1W=0dB)
Tamb =25℃
Specification Limit:
Typical: >90dB
for theharmonic frequency
FFT (dB)
+0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
20
50 100 200
500 1k
2k
Frequency (Hz)
Figure 10. Closed-loop gain vs frequency
5k 10k 20k
TestCondition:
Vcc=18V,
RL=8ohm,
Rosc=39kO, Cosc=100nF,
0dB@f=1kHz, Po=1w,
Gv=32dB,
Tamb=25℃
+0.5
-0
-0.5
-1
-1.5
d
B -2
r
-2.5
A
-3
-3.5
-4
-4.5
-5
20
Gain=32dB
Gain=22dB
Gain=26dB
Gain=30dB
Vcc=18V,
Rload=8ohm,
0dB@f=1kHz, Po=1w,
Gv=32dB
50
100
200
500
1k
2k
Hz
TDA7491MV8ohmClosed-loopgainvsFre.qat27
5k 10k 20k 30k
11/24
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| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet TDA7491MV.PDF ] | |
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