Document
® TDA7266S
5+5W DUAL BRIDGE AMPLIFIER
WIDE SUPPLY VOLTAGE RANGE (3-18V) MINIMUM EXTERNAL COMPONENTS
TECHNOLOGY BI20II
– NO SWR CAPACITOR
– NO BOOTSTRAP
– NO BOUCHEROT CELLS
)– INTERNALLY FIXED GAIN t(sSTAND-BY & MUTE FUNCTIONS
SHORT CIRCUIT PROTECTION
ucTHERMAL OVERLOAD PROTECTION te Prod ct(s)DESCRIPTION le duThe TDA7266S is a dual bridge amplifier specially so rodesigned for TV and Portable Radio applications.
Multiwatt 15 ORDERING NUMBER: TDA7266S
- Ob te PBLOCK AND APPLICATION DIAGRAM
roduct(s) ) - Obsole0.22µF P t(sIN1 lete ducST-BY
4 7
VCC 3 13
470µF
+ 1 OUT1+ -
100nF
Obso lete ProS-GND
9 Vref
so 0.22µF Ob IN2
12
- 2 OUT1+
+ 15 OUT2+
-
MUTE
6
July 2002
PW-GND 8
- 14 OUT2+
D94AU175B
1/8
TDA7266S
ABSOLUTE MAXIMUM RATINGS
Symbol VS IO Ptot Top
Tstg, Tj
Parameter Supply Voltage Output Peak Current (internally limited) Total Power Dissipation (Tcase = 70°C) Operating Temperature Storage and Junction Temperature
Value 20 1.5 25
0 to 70 -40 to +150
Unit V A W °C °C
THERMAL DATA
Symbol
Description
Value
Unit
Rth j-case Thermal Resistance Junction to case
t(s)PIN CONNECTION (Top view)
Typ. 1.6
Max. 2.2 °C/W
uc15 OUT2+ d14 OUT2ro13 VCC te P t(s)12 IN2
11 N.C.
c10 N.C. le du9 S-GND so ro8 PW-GND
7 ST-BY
b P6 MUTE - O te5 N.C. ) le4 IN1 t(s o3 VCC
s2 OUT1c b1 OUT1+ du - O D95AU261
Pro t(s)ELECTRICAL CHARACTERISTICS (VCC = 11V, RL = 8Ω, f = 1kHz, Tamb = 25°C unless otherwise te cspecified.)
le duSymbol o roVCC s PIq Ob teVOS lePO
THD
Parameter Supply Range Total Quiescent Current Output Offset Voltage Output Power Total Harmonic Distortion
ObsoSVR
Supply Voltage Rejection
Test Condition
THD = 10% PO = 1W PO = 0.1W to 2W f = 100Hz to 15kHz f = 100Hz VR = 0.5V
Min. 3
4.5
40
Typ. 11 50
5 0.05
56
Max. 18 60 120
0.2 1
Unit V mA mV W % %
dB
CT Crosstalk
46 60
dB
AMUTE TW GV ∆Gv
Mute Attenuation Thermal Threshold Closed Loop Voltage Gain Voltage Gain Matching
60 80
dB
150 °C
25 26 27 dB
0.5 dB
Ri VTMUTE
Input Resistance Mute Threshold
for VCC > 6.4V; VO = -30dB for VCC < 6.4V; VO = -30dB
25
2.3 VCC/2
-1
30
2.9 VCC/2 -0.75
4.1 VCC/2
-0.5
KΩ
V V
2/8
ELECTRICAL CHARACTERISTICS (Continued)
Symbol VTST-BY
IST-BY eN
Parameter St-by Threshold ST-BY current V6 = GND Total Output Noise Voltage
Test Condition
A curve f = 20Hz to 20kHz
TDA7266S
Min. 0.8
Typ. 1.3
150
Max. 1.8 100
Unit V µA µV
APPLICATION SUGGESTION
the amplifier, this to avoid "POP" and "CLICK" on
the outputs.
STAND-BY AND MUTE FUNCTIONS
When this voltage reaches the St-by threshold
(A) Microprocessor Application In order to avoid annoying "Pop-Noise" during
)Turn-On/Off transients, it is necessary to guarant(stee the right St-by and mute signals sequence.
It is quite simple to obtain this function using a mi-
ccroprocessor (Fig. 1 and 2). duAt first St-by signal (from mP) goes high and the rovoltage across the St-by terminal (Pin 7) starts to )increase exponentially. The external RC network te P t(sis intended to turn-on slowly the biasing circuits of cFigure 1: Microprocessor Application
level, the amplifier is switched-on and the external capacitors in series to the input terminals (C3, C5) start to charge.
It’s necessary to mantain the mute signal low until the capacitors are fully charged, this to avoid that the device goes in play mode causing a loud "Pop Noise" on the speakers.
A delay of 100-200ms between St-by and mute signals is suitable for a proper operation.
- Obsole te ProduC1 0.22µF ) leIN1 ct(s bsoST-BY R1 10K
du - OC2 ro )10µF
4 7
VCC
3 13
C5 470µF
+ 1 OUT1+
-
C6 100nF
te P uct(sµP
S-GND 9
bsole ProdC3 0.22µF O te IN2
Vref 12
ole MUTE R2 10K Obs C4
6
- 2 OUT1+
+ 15 OUT2+ -
1µF
PW-GND 8
- 14 OUT2+
D95AU258A
3/8
TDA7266S
Figure 2: Microprocessor Driving Signals.
+VS(V) +18
VIN (mV)
)VST-BY
pin 7
t(s1.8 c1.3 du0.8 te Pro t(s)VMUTE
pin 6
le uc4.1 so rod2.9 b P2.3 ct(s) - O bsoleteIq u O(mA)
lete Prodduct(s) -VOUT Obso lete Pro(V)
OFF ST-BY MUTE
PLAY
MUTE
ST-BY
OFF D96AU259
bso(B) Low Cost Application OIn low cost applications where the mP is not pre-
external voltage divider. The device is switched-on/off from the supply line
sent, the suggested circuit is shown in fig.3.
and the external capacitor C4 is intended to delay
the St-by and mute threshold exceeding, avoiding
The St-by and mute terminals are tied together "Popping" problems.
and they are connected to the supply line via an
4/8
Figure 3a: Stand-alone Low-cost Application.
TDA7266S
VCC
Vs
R1 47K
C3 0.22µF
IN1 ST-BY
4 7
3 13
C1 470µF
C2 100nF
+ 1 OUT1+
-
R2 C4
47K 10µF
t(s)S-GND 9
ducC5 0.22µF ro )IN2
Vref 12
lete P uct(sMUTE d6
- 2 OUT1+
+ 15 OUT2+ -
) - Obso lete ProPW-GND ct(s bso8
- 14 OUT2+
D95AU260B
OObbssooleletetePProrodduuct(s) - OFigure 3b: PCB and Component Layout of the Application Circuit (Fig. 1).
5/8
TDA7266S
Figure 4: Distortion vs Frequency
Figure 5: Gain vs Frequency
T H D (% ) 10
1
V cc = 11 V Rl = 8 ohm
Level(dBr) 5.0000 4.0000
3.0.