View TDA7494S_133589.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
TDA7494S
10W AMPLIFIER
10W OUTPUT POWER RL = 8, @ THD = 10% VCC = 28V ST-BY AND MUTE FUNCTIONS NO BOUCHEROT CELL NO ST-BY RC INPUT NETWORK SINGLE SUPPLY RANGING UP TO 35V SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION INTERNALLY FIXED GAIN SOFT CLIPPING LOW TURN-ON TURN-OFF POP NOISE MULTIWATT 15 PACKAGE
MULTIPOWER BI50II TECHNOLOGY
Multiwatt15 ORDERING NUMBER: TDA7494S
DESCRIPTION The TDA7494S 10W is class AB power amplifier assembled in the @Multiwatt 15 package, spe-
cially designed for high quality sound, TV applications. Features of the TDA7494S include Stand-by and mute functions.
BLOCK AND APPLICATION DIAGRAM
13 470nF IN 1 1
PWR
+VCC
14 470F MUTE/STBY PROTECTIONS
30K
PWR GND
OUT
15
SGN GND
8 7 SVR 9 STAND-BY 470F
D99AU1012
10
10K
1F
MUTE
December 1999
1/12
TDA7494S
ABSOLUTE MAXIMUM RATINGS
Symbol VS VIN Ptot Tamb Tstg, Tj DC Supply Voltage Maximum Input Voltage Total Power Dissipation (Tamb = 70C) Ambient Operating Temperature Range (1) Storage and Junction Temperature Parameter Value 40 8 16 -20 to +85 -40 to 150 Unit V Vpp W C C
(1) Operation between -20 to 85 C guaranteed by correlation with 0 to 70C. (2) Pin 3 is ESD sensitive (max. voltage 1.5KV)
PIN CONNECTION
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
D99AU1014
PWR GND OUT +VCC N.C. N.C. MUTE STAND-BY SGN GND SVR N.C. N.C. N.C. N.C. N.C. IN 1
THERMAL DATA
Symbol Rth j-case Rth j-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient max Value Typ = 3.8 35 Max = 4.8 Unit C/W C/W
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = 21V, RL = 8; Rg = 50; Tamb = 25C; unless otherwise specified.)
Symbol VS Iq DCVOS VO PO Parameter Supply Voltage Range Total Quiescent Current Output DC Offset Referred to SVR Potential Quiescent Output Voltage Output Power No Input Signal VS = 18V THD = 10%; VCC = 28V, RL = 8 THD = 1%; VCC = 28V THD = 10%; VCC = 21V, THD = 1%; VCC = 21V, THD = 10%; VCC = 21V, RL = 4 THD = 1%; VCC = 21V, THD = 10%; VCC = 18V, THD = 1%; VCC = 18V THD = 10%; VCC = 18V, RL = 8 THD = 1%; VCC = 18V 2/12 -550 7.8 8 6 5 3.5 5 3.9 4.5 3.5 3.5 2.2 9 10 8 5.5 4 6.6 5.5 6 4.5 3.75 2.85 Test Condition Min. 11 22 Typ. Max. 35 50 550 10.2 Unit V mA mV V W W W W W W
TDA7494S
ELECTRICAL CHARACTERISTICS (continued)
Symbol THD Ipeak Top Vin GV BW eN Total Output Noise f = 20Hz to 22KHz Play f = 20Hz to 22KHz Mute SR Ri SVR TM Ts VST-BY VMUTE IqST-BY AMUTE IstbyBIAS Slew Rate Input Resistance Supply Voltage Rejection Thermal Muting Thermal Shut-down Stand-by threshold Mute Threshold Quiescent Current @ Stand-by Mute Attenuation Stand-by bias current Stand by on; VST-BY = 5V; VMUTE = 5V; Play or Mute Mute Play 2.3 2.3 60 f = 1kHz; CSVR = 470A; VRIP = 1VRMS 5 22.5 36 Parameter Total Harmonic Distortion Output Peak Current Operating Temperature Input Signal Closed Loop Gain Vol Ctrl > 4.5V Test Condition PO = 1W; f = 1KHz; Gv = 26dB (internally limited) 1.4 0 24.5 26 0.6 30 30 8 30 43 150 160 2.5 2.5 0.6 75 80 2 1.5 0.5 150 20 10 5 2.7 2.7 1 50 50 1.9 70 2.8 27.5 Min. Typ. Max. 0.4 Unit % A C Vrms dB MHz V V V/s K dB C C V V mA dB A A A A
ImuteBIAS
Mute bias current
3/12
TDA7494S
Figure 1: Test and Application Circuit.
13 C2 0.1F 14 1
PWR
+VCC
C4 470nF IN 1
OUT C10 470F PGND
C1 1000F
MUTE/STBY PROTECTIONS 15 8 SVR C8 470F R5 10K 7 9 10
GND
C9 1F +5V MUTE +5V
S2 STANDBY SGN GND
S3
GND
D99AU1013
Figure 2: P.C.B. and component layout.
4/12
TDA7494S
APPLICATION SUGGESTIONS The recommended values of the external components are those shown on the application circuit of figure 1. Different values can be used; the following table can help the designer.
COMPONENT R5 C1 C2 C5 C8 C9 C10 SUGGESTION VALUE 10K 1000F 100nF 470nF 470F 1F 470F PURPOSE Mute time constant Supply voltage bypass Supply voltage bypass Input DC decoupling Ripple Rejection Mute time constant Output DC decoupling Lower low frequency cutoff Better SVR Larger mute on/off time Lower low frequency cutoff LARGER THAN SUGGESTION Larger mute on/off time SMALLER THAN SUGGESTION Smaller mute on/off time Danger of oscillation Danger of oscillation Higher low frequency cutoff Worse SVR Smaller mute on/off time Higher low frequency cutoff
TYPICAL CHARACTERISTICS: Refer to the Application Circuit of Fig.1 VS = 21V; RL = 8; f = 1KHz; RS = 8; Tamb = 25C; RS = 50; unless otherwise specified Figure 3: Output Power vs Supply Voltage
POUT (W) 14 12
VS=28V RL=8
D96AU517
Figure 4: Distortion vs Output Power
d (%)
D96AU518
1
10 8 6 4 2 0 d=1% d=10%
f=15KHz f=1KHz
0.1
0.01
5 10 15 20 25 30 Vs(V)
0
2
4
6
8 POUT(W)
5/12
TDA7494S
Figure 5: Output Power vs Supply Voltage
POUT (W) 7
RL=4
D96AU519
Figure 6: Distortion vs Output Power
d (%)
D96AU520
6 5
d=10%
1
VS=21V RL=4
4
d=1%
f=15KHz
3 2 1 0 11 13 15 17 19 VS(V)
0.1
f=1KHz
0.01 0 2 4 6 POUT(W)
Figure 7: Distortion vs Frequency
d (%)
POUT=1W RL=8
D96AU521
Figure 8: Distortion vs Frequency
d (%)
D96AU522
POUT=1W RL=4
1
1
0.1
0.1
0.01 20
100
1K
f(Hz)
0.01 20
100
1K
f(Hz)
Figure 9: Quiescent Current vs Supply Voltage
IQ (mA) 28
D96AU523
Figure 10: Quiescent Output Voltage vs Supply Voltage
VDDC (V) 15
D96AU524
26
13
24 22 20 18 16 10 14 18 22 26 30 VS(V)
11 9 7 5 10 14 18 22 26 30 VS(V)
6/12
TDA7494S
Figure 11: Stand-by Attenuation vs Vpin # 9
ATT (dB)
0dB=1W
D96AU527
Figure 12: Mute Atttenuation vs Vpin # 10
ATT (dB) 0 -20 -40 -60 -80 -100
0dB=1W
D96AU528
0 -20 -40 -60 -80 -100 -120 -140 0 1 2 3 4 Vpin#9(V)
0
1
2
3
4 Vpin#10(V)
Figure 13: Power Dissipation vs Output Power
PDISS (W)
RL=8
D96AU529
Figure 14: Power Dissipation vs Output Power
PDISS (W)
RL=4
D96AU530
8
VS=35V
8
VS=21V
6
VS=28V
6
4
VS=21V
4
VS=18V
2
2
0 0.1
1
10 POUT(W)
0 0.1
1
10 POUT(W)
7/12
TDA7494S
MUTE STAND-BY TRUTH TABLE
MUTE H L H L ST-BY H H L L OPERATING CONDITION STANDBY STANDBY MUTE PLAY
Turn ON/OFF Sequences (for optimising the POP performances) A) USING MUTE AND STAND-BY FUNCTIONS
VS (V) 28
ST-BY pin#9 (V) 5
VSVR pin#7(V)
2.5V MUTE pin#10 (V) 5
INPUT (mV)
VOUT (V)
OFF
STBY MUTE
PLAY
MUTE STBY
OFF
IQ (mA)
D96AU531A
B) USING ONLY THE MUTE FUNCTION To semplify the application, the stand-by pin can be connected directly to Ground. During the ON/OFF transitions we recommend to respect the following conditions:
- At the turn-on the transition mute to play must be made when the SVR pin is higher than 2.5V - At the turn-off the TDA7494S must be brought to mute from the play condition when the SVR pin is higher than 2.5V.
8/12
TDA7494S
PINS: IN1
VS INn 30K 100A SVR
D97AU581
PIN: SVR
VS VS VS
+ 30K
OUT L
20K SVR 20K
6K
1K
6K
1K 30K OUT R -
100A
+
D97AU585A
9/12
TDA7494S
PIN: ST-BY PIN: MUTE
VS 10A STBY 200
VS MUTE 300 10K
50A
D97AU586
D97AU587
PIN: OUT
VS
PINS: PW-GND, S-GND
OUT
VS GND
D97AU593
D97AU588
10/12
TDA7494S
DIM. MIN. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 21.9 21.7 17.65 17.25 10.3 2.65 4.25 4.63 1.9 1.9 3.65 4.55 5.08 17.5 10.7 22.2 22.1 0.49 0.66 1.02 17.53 19.6 20.2 22.5 22.5 18.1 17.75 10.9 2.9 4.85 5.53 2.6 2.6 3.85 0.862 0.854 0.695 0.679 0.406 0.104 0.167 0.182 0.075 0.075 0.144 0.179 0.200 0.689 0.421 0.874 0.870 1.27 17.78 1 0.55 0.75 1.52 18.03 0.019 0.026 0.040 0.690 0.772 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.218 0.102 0.102 0.152 0.050 0.700 mm TYP. MAX. 5 2.65 1.6 0.039 0.022 0.030 0.060 0.710 MIN. inch TYP. MAX. 0.197 0.104 0.063
OUTLINE AND MECHANICAL DATA
Multiwatt15 V
11/12
TDA7494S
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 (c) 1999 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com
12/12

▲Up To Search▲

Price & Availability of TDA7494S

	To Download TDA7494S Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .