TDA7851FH-QIX [STMICROELECTRONICS]

4 48 W MOSFET quad bridge power amplifier;
TDA7851FH-QIX
型号: TDA7851FH-QIX
厂家: ST    ST
描述:

4 48 W MOSFET quad bridge power amplifier

文件: 总18页 (文件大小:446K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
TDA7851F  
4 x 48 W MOSFET quad bridge power amplifier  
Datasheet - production data  
Automute at min. supply voltage detection  
Low external component count:  
– Internally fixed gain (26 dB)  
– No external compensation  
– No bootstrap capacitors  
Output DC offset detector  
Protections:  
'!0'03ꢀꢀꢄꢅꢀ  
'!0'03ꢀꢁꢂꢃꢁ  
– Output short circuit to GND, to V , across  
s
Flexiwatt25  
(Horizontal)  
Flexiwatt25  
(Vertical)  
the load  
– Very inductive loads  
– Overrating chip temperature with soft  
thermal limiter  
– Load dump voltage  
– Fortuitous open GND  
– Reversed battery  
– ESD  
Features  
Multipower BCD technology  
High output power capability:  
– 4 x 48 W/4 Ω max.  
Description  
The TDA7851F is a breakthrough MOSFET  
technology class AB audio power amplifier,  
designed for high-power car radio.  
– 4 x 28 W/4 Ω @ 14.4 V, 1 kHz, 10%  
– 4 x 72 W/2 Ω max.  
MOSFET output power stage  
Excellent 2 Ω driving capability  
Hi-Fi class distortion  
Low output noise  
The fully complementary P-Channel/N-Channel  
output structure allows a rail-to-rail output voltage  
swing. This, combined with high output current  
and minimized saturation losses, sets new power  
references in the car-radio field, with unparalleled  
distortion performance.  
Standby function  
Mute function  
Table 1. Device summary  
Order code  
Package  
Packing  
TDA7851F  
Flexiwatt25 (vertical)  
Tube  
Tube  
TDA7851FH-QIX  
Flexiwatt25 (horizontal)  
February 2016  
DocID17714 Rev 4  
1/18  
This is information on a product in full production.  
www.st.com  
 
 
 
Contents  
TDA7851F  
Contents  
1
2
3
Block diagram and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
1.1  
1.2  
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
2.1  
2.2  
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
3.1  
3.2  
3.3  
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
4
Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
4.1  
4.2  
4.3  
4.4  
SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Standby and muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Heatsink definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
5
6
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
5.1  
5.2  
Flexiwatt 25 (vertical) package information . . . . . . . . . . . . . . . . . . . . . . . 13  
Flexiwatt 25 (horizontal) package information . . . . . . . . . . . . . . . . . . . . . 15  
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
2/18  
DocID17714 Rev 4  
TDA7851F  
List of tables  
List of tables  
Table 1.  
Table 2.  
Table 3.  
Table 4.  
Table 5.  
Table 6.  
Table 7.  
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Flexiwatt 25 (vertical) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Flexiwatt 25 (horizontal) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
DocID17714 Rev 4  
3/18  
3
List of figures  
TDA7851F  
List of figures  
Figure 1.  
Figure 2.  
Figure 3.  
Figure 4.  
Figure 5.  
Figure 6.  
Figure 7.  
Figure 8.  
Figure 9.  
Block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Output power vs. supply voltage (R = 4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
L
Output power vs. supply voltage (R = 2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
L
Distortion vs. output power (R = 4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
L
Distortion vs. output power (R = 2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
L
Distortion vs. frequency (R = 4 Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
L
Figure 10. Distortion vs. frequency (R = 2 Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
L
Figure 11. Crosstalk vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Figure 12. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Figure 13. Output attenuation vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Figure 14. Power dissipation and efficiency vs. output power (R = 4 Ω, SINE) . . . . . . . . . . . . . . . . . 10  
L
Figure 15. Power dissipation and efficiency vs. output power (R = 2 Ω, SINE) . . . . . . . . . . . . . . . . . 10  
L
Figure 16. Power dissipation vs. output power (R = 4 Ω, audio program simulation). . . . . . . . . . . . . 11  
L
Figure 17. Power dissipation vs. output power (R = 2 Ω, audio program simulation). . . . . . . . . . . . . 11  
L
Figure 18. ITU R-ARM frequency response, weighting filter for transient pop. . . . . . . . . . . . . . . . . . . 11  
Figure 19. Flexiwatt 25 (vertical) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
Figure 20. Flexiwatt 25 (horizontal) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
4/18  
DocID17714 Rev 4  
TDA7851F  
Block diagram and application circuit  
1
Block diagram and application circuit  
1.1  
Block diagram  
Figure 1. Block diagram  
6CCꢀ  
6CCꢂ  
34"9  
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362  
4!"  
3ꢁ'.$  
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1.2  
Application circuit  
Figure 2. Application circuit  
#ꢌ  
#ꢊ  
ꢆꢇꢀP&  
ꢂꢂꢆꢆP&  
6CCꢀꢁꢂ  
6CCꢄꢁꢅ  
ꢂꢆ  
2ꢀ  
34"9  
ꢀꢆ+  
#ꢈ  
P&  
/54ꢀ  
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2ꢂ  
-54%  
ꢂꢂ  
ꢅꢊ+  
#ꢀꢆ  
P&  
#ꢀ  
).ꢀ  
ꢀꢀ  
ꢀꢂ  
ꢀꢉ  
ꢆꢇꢀP&  
).ꢂ  
ꢀꢊ  
ꢀꢌ  
ꢀꢈ  
#ꢂ ꢆꢇꢀP&  
).ꢄ  
#ꢄ ꢆꢇꢀP&  
ꢂꢀ  
ꢂꢅ  
ꢂꢄ  
).ꢅ  
ꢀꢅ  
ꢀꢄ  
#ꢅ ꢆꢇꢀP&  
3ꢁ'.$  
ꢀꢋ  
ꢀꢆ  
ꢂꢉ  
362  
4!"  
/$  
#ꢉ  
ꢆꢇꢅꢊP&  
#ꢋ  
ꢅꢊP&  
!#ꢀꢀꢆꢂꢁ  
2ꢄ  
6
ꢅꢊ+  
/$ /54  
'!0'03ꢀꢁꢅꢀꢇ  
DocID17714 Rev 4  
5/18  
17  
 
 
 
 
 
Pin description  
TDA7851F  
2
Pin description  
2.1  
Pin connection  
Figure 3. Pin connection (top view)  
ꢂꢉ  
'!0'03ꢀꢁꢅꢀꢄ  
2.2  
Thermal data  
Table 2. Thermal data  
Parameter  
Symbol  
Value  
Unit  
Rth j-case Thermal resistance junction-to-case  
max  
1
°C/W  
6/18  
DocID17714 Rev 4  
 
 
 
 
 
TDA7851F  
Electrical specifications  
3
Electrical specifications  
3.1  
Absolute maximum ratings  
Table 3. Absolute maximum ratings  
Symbol  
Parameter  
Operating supply voltage  
Value  
Unit  
VS  
18  
28  
50  
V
V
V
VS (DC) DC supply voltage  
VS (pk)  
Peak supply voltage (for t = 50 ms)  
Output peak current  
IO  
Non repetitive (t = 100 μs)  
Repetitive (duty cycle 10% at f = 10 Hz)  
10  
9
A
A
Ptot  
Tj  
Power dissipation Tcase = 70 °C  
Junction temperature  
85  
150  
W
°C  
°C  
Tstg  
Storage temperature  
-55 to 150  
3.2  
Electrical characteristics  
Refer to the test and application diagram, V = 14.4 V; R = 4 Ω; Rg = 600 Ω; f = 1 kHz;  
S
L
T
= 25 °C; unless otherwise specified.  
amb  
Table 4. Electrical characteristics  
Test condition  
Symbol  
Parameter  
Min.  
Typ.  
Max.  
Unit  
VS  
Iq1  
Supply voltage range  
Quiescent current  
-
8
-
150  
-
18  
V
RL =  
100  
-60  
300  
+60  
mA  
mV  
VOS  
Output offset voltage  
Play mode / Mute mode  
During mute ON/OFF output offset  
voltage  
-10  
-
+10  
+10  
mV  
mV  
ITU R-ARM weighted  
dVOS  
see Figure 18  
During standby ON/OFF output  
offset voltage  
-10  
25  
-
Gv  
Voltage gain  
-
-
26  
27  
±1  
dB  
dB  
dGv  
Channel gain unbalance  
VS = 14.4 V; THD = 10%  
VS = 14.4 V; THD = 1%  
25  
-
28  
22  
W
W
-
-
Po  
Output power  
VS = 14.4 V; THD = 10%, 2 Ω  
VS = 14.4 V; THD = 1%, 2 Ω  
48  
38  
W
W
45  
75  
48  
VS = 14.4 V; RL = 4 Ω  
VS = 14.4 V; RL = 2 Ω  
Vs = 15.2V; RL = 4 Ω (square  
Po max. Max. output power(1)  
-
-
W
wave input (2 Vrms))  
DocID17714 Rev 4  
7/18  
17  
 
 
 
 
 
Electrical specifications  
TDA7851F  
Table 4. Electrical characteristics (continued)  
Test condition  
Symbol  
Parameter  
Min.  
Typ.  
Max.  
Unit  
THD  
Distortion  
Po = 4 W  
-
0.01  
0.05  
%
"A" Weighted  
35  
50  
μV  
μV  
eNo  
Output noise  
-
Bw = 20 Hz to 20 kHz  
100  
SVR  
fch  
Supply voltage rejection  
High cut-off frequency  
Input Impedance  
f = 100 Hz; Vr = 1 Vrms  
50  
100  
70  
70  
-
-
dB  
kHz  
kΩ  
PO = 0.5W  
-
300  
100  
Ri  
130  
f = 1 kHz PO = 4 W  
f = 10 kHz PO = 4 W  
60  
70  
60  
-
-
dB  
dB  
CT  
Cross talk  
VSt-By = 1.2 V  
VSt-By = 0  
-
-
-
-
20  
10  
±1  
μA  
μA  
μA  
V
ISB  
Standby current consumption  
Standby pin current  
Ipin5  
VSt-By = 1.2 V to 2.6 V  
(Amp: ON)  
-
-
VSB out Standby out threshold voltage  
2.6  
-
-
VSB in  
AM  
VM out  
VM in  
Standby in threshold voltage  
Mute attenuation  
(Amp: OFF)  
POref = 4 W  
-
1.2  
1.2  
V
80  
2.6  
-
90  
-
dB  
V
Mute out threshold voltage  
Mute in threshold voltage  
(Amp: Play)  
(Amp: Mute)  
-
V
(Amp: Mute)  
Att. 80 dB; POref = 4 W  
6.7  
7
V
VAM in  
VS automute threshold  
Muting pin current  
(Amp: Play)  
Att. < 0.1 dB; PO = 0.5 W  
7.5  
12  
-
8
V
VMUTE = 1.2 V  
7
18  
18  
μA  
μA  
(Sourced current)  
Ipin23  
VMUTE = 2.6 V  
-5  
Offset detector  
VOFF  
Detected diff. output offset  
VST-BY = 5 V  
±1  
-
±2  
0.2  
0
±3  
0.4  
15  
V
V
Vo > ±3 V, Ioff Det = 1 mA  
0 V < Voff Det < 18 V  
VOFF_SAT Off detector sat voltage  
VOFF_LK Off detector leakage current  
1. Saturated square wave output  
Vo < ±1 V  
-
μA  
8/18  
DocID17714 Rev 4  
TDA7851F  
Electrical specifications  
3.3  
Electrical characteristics curves  
Figure 4. Quiescent current vs. supply voltage  
Figure 5. Output power vs. supply voltage  
(R = 4 Ω)  
L
)
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ꢀꢅꢆ  
ꢀꢄꢆ  
ꢀꢂꢆ  
ꢌꢆ  
ꢊꢉ  
ꢊꢆ  
ꢋꢉ  
ꢋꢆ  
ꢉꢉ  
ꢉꢆ  
ꢅꢉ  
ꢅꢆ  
ꢄꢉ  
ꢄꢆ  
ꢂꢉ  
ꢂꢆ  
ꢀꢉ  
ꢀꢆ  
6I ꢏ ꢆ  
2,  
0OꢁMAX  
2,ꢏ ꢅ:  
F ꢏꢀ +(Z  
f
4($ꢏꢀꢆꢐ  
4($ꢏꢀꢐ  
ꢀꢆ  
ꢀꢂ  
ꢀꢅ  
ꢀꢋ  
ꢀꢌ  
ꢀꢆ  
ꢀꢀ  
ꢀꢂ  
ꢀꢄ  
ꢀꢅ  
ꢀꢉ  
ꢀꢋ  
ꢀꢊ  
ꢀꢌ  
6
ꢍ6ꢎ  
6S ꢍ6ꢎ  
S
'!0'03ꢀꢁꢁꢈꢂ  
'!0'03ꢀꢁꢁꢈꢃ  
Figure 6. Output power vs. supply voltage  
(R = 2 Ω)  
Figure 7. Distortion vs. output power (R = 4 Ω)  
L
L
0O ꢍ7ꢎ  
4($ ꢍꢎ  
ꢀꢆ  
ꢀꢄꢆ  
ꢀꢂꢆ  
ꢀꢀꢆ  
ꢀꢆꢆ  
ꢈꢆ  
0OꢁMAX  
6S ꢏ ꢀꢅꢇꢅ 6  
2, ꢏ ꢅ:  
2,ꢏꢂ:  
Fꢏꢀ +(Z  
ꢌꢆ  
F ꢏ ꢀꢆ +(Z  
4($ꢏꢀꢆꢐ  
4($ꢏꢀꢐ  
ꢊꢆ  
ꢆꢇꢀ  
ꢋꢆ  
ꢉꢆ  
ꢅꢆ  
F ꢏ ꢀ +(Z  
ꢆꢇꢆꢀ  
ꢄꢆ  
ꢂꢆ  
ꢀꢆ  
ꢆꢇꢆꢆꢀ  
ꢀꢆ  
ꢀꢀ  
ꢀꢂ  
ꢀꢄ  
ꢀꢅ  
ꢀꢉ  
ꢀꢋ  
ꢀꢊ  
ꢀꢌ  
ꢆꢇꢀ  
ꢀꢆ  
ꢀꢆꢆ  
0O ꢍ7ꢎ  
6
S ꢍ6ꢎ  
'!0'03ꢀꢁꢁꢈꢆ  
'!0'03ꢀꢁꢁꢈꢇ  
Figure 8. Distortion vs. output power (R = 2 Ω) Figure 9. Distortion vs. frequency (R = 4 Ω)  
L
L
4($ ꢍꢎ  
4($ ꢍꢎ  
ꢀꢆ  
ꢀꢆ  
6S ꢏ ꢀꢅꢇꢅ 6  
2, ꢏ ꢅ :  
0O ꢏ ꢅ 7  
6S ꢏ ꢀꢅꢇꢅ 6  
2, ꢏ ꢂ :  
F ꢏ ꢀꢆ +(Z  
F ꢏ ꢀ +(Z  
ꢆꢇꢀ  
ꢆꢇꢀ  
ꢆꢇꢆꢀ  
ꢆꢇꢆꢆꢀ  
ꢆꢇꢆꢀ  
ꢆꢇꢆꢆꢀ  
ꢀꢆ  
ꢀꢆꢆ  
ꢀꢆꢆꢆ  
F ꢍ(Zꢎ  
ꢀꢆꢆꢆꢆ  
ꢀꢆꢆꢆꢆꢆ  
ꢆꢇꢀ  
ꢀꢆ  
ꢀꢆꢆ  
0O ꢍ7ꢎ  
'!0'03ꢀꢁꢁꢈꢄ  
'!0'03ꢀꢁꢁꢈꢅ  
DocID17714 Rev 4  
9/18  
17  
 
 
 
 
 
 
 
Electrical specifications  
TDA7851F  
Figure 10. Distortion vs. frequency (R = 2 Ω)  
Figure 11. Crosstalk vs. frequency  
L
4($ ꢍꢎ  
ꢀꢆ  
#2/334!,+ ꢍD"ꢎ  
ꢁꢂꢆ  
ꢁꢄꢆ  
ꢁꢅꢆ  
ꢁꢉꢆ  
ꢁꢋꢆ  
ꢁꢊꢆ  
ꢁꢌꢆ  
ꢁꢈꢆ  
ꢁꢀꢆꢆ  
6S ꢏ ꢀꢅꢇꢅ 6  
2, ꢏ ꢂ:  
0O ꢏ ꢌ 7  
2, ꢏ ꢅ :  
0O ꢏ ꢅ7  
2G ꢏ ꢋꢆꢆ:  
ꢆꢇꢀ  
ꢆꢇꢆꢀ  
ꢆꢇꢆꢆꢀ  
ꢀꢆ  
ꢀꢆꢆ  
ꢀꢆꢆꢆ  
F ꢍ(Zꢎ  
ꢀꢆꢆꢆꢆ  
ꢀꢆꢆꢆꢆꢆ  
ꢀꢆ  
ꢀꢆꢆ  
ꢀꢆꢆꢆ  
F ꢍ(Zꢎ  
ꢀꢆꢆꢆꢆ  
ꢀꢆꢆꢆꢆꢆ  
'!0'03ꢀꢁꢁꢈꢈ  
'!0'03ꢀꢁꢁꢈꢉ  
Figure 12. Supply voltage rejection vs.  
frequency  
Figure 13. Output attenuation vs. supply  
voltage  
/54054 !44. ꢍD"ꢎ  
362 ꢍD"ꢎ  
ꢁꢂꢆ  
ꢁꢄꢆ  
ꢁꢅꢆ  
ꢁꢉꢆ  
ꢁꢋꢆ  
ꢁꢊꢆ  
ꢁꢌꢆ  
ꢁꢈꢆ  
ꢁꢀꢆꢆ  
ꢁꢂꢆ  
ꢁꢅꢆ  
ꢁꢋꢆ  
ꢁꢌꢆ  
ꢁꢀꢆꢆ  
2G ꢏ ꢋꢆꢆ:  
6RIPPLE ꢏ ꢀ6RMS  
2, ꢏ ꢅ:  
0O ꢏ ꢅ 7 REF  
ꢀꢆ  
ꢀꢆꢆ  
ꢀꢆꢆꢆ  
F ꢍ(Zꢎ  
ꢀꢆꢆꢆꢆ  
ꢀꢆꢆꢆꢆꢆ  
ꢀꢆ  
6S ꢍ6ꢎ  
'!0'03ꢀꢁꢂꢀꢁ  
'!0'03ꢀꢁꢂꢀꢀ  
Figure 14. Power dissipation and efficiency vs. Figure 15. Power dissipation and efficiency vs.  
output power (R = 4 Ω, SINE) output power (R = 2 Ω, SINE)  
L
L
0
TOT ꢍ7ꢎ  
ꢎ  
0TOT ꢍ7ꢎ  
K ꢎ  
ꢀꢌꢆ  
ꢀꢋꢆ  
ꢀꢅꢆ  
ꢀꢂꢆ  
ꢀꢆꢆ  
ꢌꢆ  
ꢈꢆ  
ꢌꢆ  
ꢊꢆ  
ꢋꢆ  
ꢉꢆ  
ꢅꢆ  
ꢄꢆ  
ꢂꢆ  
ꢀꢆ  
ꢈꢆ  
ꢌꢆ  
ꢊꢆ  
ꢈꢆ  
ꢌꢆ  
ꢊꢆ  
ꢋꢆ  
ꢉꢆ  
ꢅꢆ  
ꢄꢆ  
ꢂꢆ  
ꢀꢆ  
K
6S ꢏ ꢀꢅꢇꢅ 6  
, ꢏ ꢅ X ꢂ:  
F ꢏ ꢀ +(Z 3).%  
6S ꢏ ꢀꢅꢇꢅ 6  
2, ꢏ ꢅ X ꢅ:  
F ꢏ ꢀ +(Z 3).%  
2
K
ꢋꢆ  
ꢉꢆ  
ꢅꢆ  
0TOT  
0TOT  
ꢄꢆ  
ꢂꢆ  
ꢋꢆ  
ꢅꢆ  
ꢀꢆ  
ꢂꢆ  
ꢀꢆ ꢀꢂ ꢀꢅ ꢀꢋ ꢀꢌ ꢂꢆ ꢂꢂ ꢂꢅ ꢂꢋ ꢂꢌ  
ꢀꢆ  
ꢀꢉ  
ꢂꢆ  
ꢂꢉ  
0O ꢍ7ꢎ  
ꢄꢆ  
ꢄꢉ  
ꢅꢆ  
ꢅꢉ  
ꢉꢆ  
0O ꢍ7ꢎ  
'!0'03ꢀꢁꢂꢀꢂ  
'!0'03ꢀꢁꢂꢀꢃ  
10/18  
DocID17714 Rev 4  
 
 
 
 
 
 
TDA7851F  
Electrical specifications  
Figure 16. Power dissipation vs. output power  
Figure 17. Power dissipation vs. output power  
(R = 4 Ω, audio program simulation)  
(R = 2 Ω, audio program simulation)  
L
L
0TOT ꢍ7ꢎ  
0
TOT ꢍ7ꢎ  
ꢋꢆ  
ꢉꢉ  
ꢉꢆ  
ꢅꢉ  
ꢅꢆ  
ꢄꢉ  
ꢄꢆ  
ꢂꢉ  
ꢂꢆ  
ꢀꢉ  
ꢀꢆ  
ꢄꢆ  
ꢂꢉ  
ꢂꢆ  
ꢀꢉ  
ꢀꢆ  
6S ꢏ ꢀꢅꢇꢅ 6  
2, ꢏ ꢅ X ꢅ :  
'!533)!. ./)3%  
6S ꢏ ꢀꢅꢇꢅ 6  
2, ꢏ ꢅ X ꢂ :  
'!533)!. ./)3%  
#,)0 34!24  
#,)0 34!24  
ꢀꢆ  
O ꢍ7ꢎ  
0O ꢍ7ꢎ  
0
'!0'03ꢀꢁꢂꢀꢆ  
'!0'03ꢀꢁꢂꢀꢇ  
Figure 18. ITU R-ARM frequency response,  
weighting filter for transient pop  
/UTPUT ATTENUATION ꢍD"ꢎ  
ꢀꢆ  
ꢁꢀꢆ  
ꢁꢂꢆ  
ꢁꢄꢆ  
ꢁꢅꢆ  
ꢁꢉꢆ  
ꢀꢆ  
ꢀꢆꢆ  
ꢀꢆꢆꢆ  
(Z  
ꢀꢆꢆꢆꢆ  
ꢀꢆꢆꢆꢆꢆ  
'!0'03ꢀꢁꢂꢀꢄ  
DocID17714 Rev 4  
11/18  
17  
 
 
 
Application hints  
TDA7851F  
4
Application hints  
4.1  
SVR  
Besides its contribution to the ripple rejection, the SVR capacitor governs the turn ON/OFF  
time sequence and, consequently, plays an essential role in the pop optimization during  
ON/OFF transients.To conveniently serve both needs, its minimum recommended value  
is 10μF.  
4.2  
4.3  
Input stage  
The TDA7851's inputs are ground-compatible and can stand very high input signals  
(± 8 Vpk) without any performance degradation.  
If the standard value for the input capacitors (0.1 μF) is adopted, the low frequency cut-off  
amounts to 16 Hz.  
The input capacitors should be 1/4 of the capacitor connected to AC-GND pin for optimum  
pop performance.  
Standby and muting  
Standby and muting facilities are both CMOS-compatible. In absence of true CMOS ports or  
microprocessors, a direct connection to Vs of these two pins is admissible but a 470 k  
equivalent resistance should be present between the power supply and muting and standby  
pins.  
R-C cells have always to be used in order to smooth down the transitions for preventing any  
audible transient noise.  
About standby, the time constant to be assigned in order to obtain a virtually pop-free  
transition has to be slower than 2.5 V /ms.  
4.4  
Heatsink definition  
Under normal usage (4 Ohm speakers) the heatsink's thermal requirements have to be  
deduced from Figure 16, which reports the simulated power dissipation when real  
music/speech programmers are played out. Noise with Gaussian-distributed amplitude was  
employed for this simulation. Based on that, frequent clipping occurrence (worst-case)  
causes P  
= 26 W. Assuming Tamb = 70 °C and TCHIP = 150 °C as boundary conditions,  
diss  
the heatsink's thermal resistance should be approximately 2 °C/W. This would avoid any  
thermal shutdown occurrence even after long-term and full-volume operation.  
12/18  
DocID17714 Rev 4  
 
 
 
 
 
TDA7851F  
Package information  
5
Package information  
In order to meet environmental requirements, ST offers these devices in different grades of  
®
®
ECOPACK packages, depending on their level of environmental compliance. ECOPACK  
specifications, grade definitions and product status are available at: www.st.com.  
®
ECOPACK is an ST trademark.  
5.1  
Flexiwatt 25 (vertical) package information  
Figure 19. Flexiwatt 25 (vertical) package outline  
9
&
%
9
+
+ꢈ  
9ꢂ  
$
+ꢆ  
+ꢂ  
5ꢂ  
5ꢃ  
9ꢈ  
5ꢆ  
5
/
/ꢈ  
9ꢈ  
9ꢆ  
'
5ꢆ  
5ꢈ  
5ꢈ  
0
5ꢈ  
(
/ꢉ  
3LQꢇꢈ  
*
)
*ꢈ  
0ꢈ  
ꢀꢁꢂꢃꢄꢅꢆB)Bꢃ:ꢇꢇꢇꢇꢇꢇꢇꢇ  
*$3*36ꢀꢁꢂꢃꢃ  
Table 5. Flexiwatt 25 (vertical) package mechanical data  
Dimensions  
Ref  
Millimeters  
Typ.  
Inches(1)  
Min.  
Max.  
Min.  
Typ.  
Max.  
A
B
C
D
E
4.45  
1.80  
-
4.50  
1.90  
1.40  
0.90  
0.39  
4.65  
2.00  
-
0.1752  
0.0709  
-
0.1772  
0.0748  
0.0551  
0.0354  
0.0154  
0.1831  
0.0787  
-
0.75  
0.37  
1.05  
0.42  
0.0295  
0.0146  
0.0413  
0.0165  
DocID17714 Rev 4  
13/18  
17  
 
 
 
 
Package information  
TDA7851F  
Table 5. Flexiwatt 25 (vertical) package mechanical data (continued)  
Dimensions  
Ref  
Millimeters  
Typ.  
Inches(1)  
Typ.  
Min.  
Max.  
Min.  
Max.  
F(2)  
G
-
-
0.570  
-
-
0.0224  
0.80  
1.00  
24.00  
29.23  
17.00  
12.80  
0.80  
22.47  
18.97  
15.70  
7.85  
5.00  
3.50  
4.00  
4.00  
2.20  
2.00  
1.70  
0.50  
0.30  
1.25  
0.50  
5°  
1.20  
0.0315  
0.0394  
0.9449  
1.1508  
0.6693  
0.5039  
0.0315  
0.8846  
0.7469  
0.6181  
0.3091  
0.1969  
0.1378  
0.1575  
0.1575  
0.0866  
0.0787  
0.0669  
0.0197  
0.0118  
0.0492  
0.0197  
5°  
0.0472  
G1  
H(3)  
H1  
H2  
H3  
L
23.75  
24.25  
0.9350  
0.9547  
28.90  
29.30  
1.1378  
1.1535  
-
-
-
-
-
-
-
-
-
-
-
-
22.07  
22.87  
0.8689  
0.9004  
L1  
L2(3)  
L3  
L4  
L5  
M
18.57  
19.37  
0.7311  
0.7626  
15.50  
15.90  
0.6102  
0.6260  
7.70  
7.95  
0.3031  
0.3130  
-
-
-
-
3.35  
3.65  
0.1319  
0.1437  
3.70  
4.30  
0.1457  
0.1693  
M1  
N
3.60  
4.40  
0.1417  
0.1732  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
O
R
R1  
R2  
R3  
R4  
V
V1  
V2  
V3  
3°  
3°  
20°  
20°  
45°  
45°  
1. Values in inches are converted from mm and rounded to 4 decimal digits.  
2. Dam-bar protusion not included.  
3. Molding protusion included.  
14/18  
DocID17714 Rev 4  
 
TDA7851F  
Package information  
5.2  
Flexiwatt 25 (horizontal) package information  
Figure 20. Flexiwatt 25 (horizontal) package outline  
9
+
+ꢆ  
$
+ꢈ  
+ꢂ  
0
0ꢈ  
)
*
*ꢈ  
0ꢆ  
ꢀꢂꢊꢊꢀꢂꢂB'B4,  
*$3*36ꢀꢁꢂꢃꢄ  
Table 6. Flexiwatt 25 (horizontal) package mechanical data  
Dimensions  
Ref  
Millimeters  
Typ.  
Inches(1)  
Typ.  
Min.  
Max.  
Min.  
Max.  
A
B
4.45  
4.50  
1.90  
1.40  
2.00  
0.39  
-
4.65  
2.00  
-
0.1752  
0.1772  
0.0748  
0.0551  
0.0787  
0.0154  
-
0.1831  
1.80  
0.0709  
0.0787  
C
-
-
-
D
-
-
-
-
E
0.37  
0.42  
0.57  
1.25  
24.30  
29.30  
-
0.0146  
0.0165  
0.0224  
0.0492  
0.9567  
1.1535  
-
F(2)  
-
0.75  
23.70  
28.90  
-
-
G
1.00  
24.00  
29.23  
17.00  
12.80  
0.80  
22.04  
0.0295  
0.0394  
0.9449  
1.1508  
0.6693  
0.5039  
0.0315  
0.8677  
G1  
H(3)  
H1  
H2  
H3  
L
0.9331  
1.1378  
-
-
-
-
-
-
-
-
-
21.64  
22.44  
0.8520  
0.8835  
DocID17714 Rev 4  
15/18  
17  
 
 
 
Package information  
TDA7851F  
Table 6. Flexiwatt 25 (horizontal) package mechanical data (continued)  
Dimensions  
Ref  
Millimeters  
Typ.  
Inches(1)  
Typ.  
Min.  
Max.  
Min.  
Max.  
L1  
L2 (3)  
L3  
L4  
L5  
L6  
M
10.15  
10.5  
15.70  
7.85  
5
10.85  
0.3996  
0.4134  
0.6181  
0.3091  
0.1969  
0.2146  
0.0768  
0.1181  
0.1862  
0.2209  
0.0866  
0.1378  
0.0669  
0.0197  
0.0118  
0.0492  
0.0197  
5°  
0.4272  
15.50  
15.90  
0.6102  
0.6260  
7.70  
7.95  
0.3031  
0.3130  
-
-
-
-
5.15  
5.45  
1.95  
3.00  
4.73  
5.61  
2.20  
3.50  
1.70  
0.50  
0.30  
1.25  
0.50  
5°  
5.85  
0.2028  
0.2303  
1.80  
2.10  
0.0709  
0.0827  
2.75  
3.50  
0.1083  
0.1378  
M1  
M2  
N
-
-
-
-
-
-
-
-
-
-
-
-
P
3.20  
3.80  
0.1260  
0.1496  
R
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
R1  
R2  
R3  
R4  
V
V1  
V2  
V3  
3°  
3°  
20°  
20°  
45°  
45°  
1. Values in inches are converted from mm and rounded to 4 decimal digits.  
2. Dam-bar protusion not included.  
3. Molding protusion included.  
16/18  
DocID17714 Rev 4  
TDA7851F  
Revision history  
6
Revision history  
Table 7. Document revision history  
Date  
Revision  
Changes  
09-Jul-2010  
1
Initial release.  
Updated: Features on page 1;  
13-Jun-2012  
18-Sep-2013  
2
3
Section 3.2: Electrical characteristics on page 7.  
Updated disclaimer.  
Updated Table 1: Device summary on page 1 (added  
new order code).  
05-Feb-2016  
4
Updated Section 5: Package information (added  
Flexiwatt25 horizontal package information).  
DocID17714 Rev 4  
17/18  
17  
 
 
TDA7851F  
IMPORTANT NOTICE – PLEASE READ CAREFULLY  
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and  
improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on  
ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order  
acknowledgement.  
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or  
the design of Purchasers’ products.  
No license, express or implied, to any intellectual property right is granted by ST herein.  
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.  
ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.  
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.  
© 2016 STMicroelectronics – All rights reserved  
18/18  
DocID17714 Rev 4  

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