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PDF STA540SA Data sheet ( Hoja de datos )
| Número de pieza | STA540SA | |
| Descripción | 4 x 10W DUAL/QUAD POWER AMPLIFIER | |
| Fabricantes | STMicroelectronics | |
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STA540SA
4 x 10W DUAL/QUAD POWER AMPLIFIER
TARGET SPECIFICATIONS
1 FEATURES
■ HIGH OUTPUT POWER CAPABILITY
– 4 x 9W / 2Ω @12V; 1KHz; 10%
– 4 x 10W / 4Ω @17V; 1KHz; 10%
– 2 x 26W / 4Ω @14.4V; 1KHz; 10%
– 2 x 15W / 8Ω @16V; 1KHz; 10%
■ MINIMUM EXTERNAL COMPONENTS
COUNT:
– NO BOOTSTRAP CAPACITORS
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN 20dB
■ ST-BY FUNCTION (CMOS COMPATIBLE)
■ NO AUDIBLE POP DURING ST-BY
OPERATIONS
■ DIAGNOSTIC FACILITIES
– CLIP DETECTOR
– OUT TO GND SHORT
– OUT TO VS SHORT
– SOFT SHORT AT TURN-ON
– THERMAL SHUTDOWN PROXIMITY
2 PROTECTIONS
■ OUPUT AC/DC SHORT CIRCUIT
■ SOFT SHORT AT TURN-ON
Figure 1. Package
Clipwatt 19
Table 1. Order Codes
Part Number
STA540SA
Package
Clipwatt 19
■ OVERRATING CHIP TEMPERATURE WITH
SOFT THERMAL LIMITER
■ VERY INDUCTIVE LOADS
■ ESD
3 DESCRIPTION
The amplifier is a class AB Audio amplifier assem-
bled in the Clipwatt19 package designed for high
quality sound application.
The STA540SA is a 4 Single ended amplifier with
integrated in the device the Short Circuit Protec-
tion, the Thermal Protection and the Diagnostics
Functions .
wFwiwg.uDraetaS2h. eBelt4oUc.kcoDmiagram
VCC2
17
VCC1
3
4
IN1
9
ST-BY
5
IN2
16
IN3
15
IN4
8
SVR
A1
+
-
A2 INV
+
-
A3
+
-
A4 INV
+
-
10
P-GND
1
OUT1
2
OUT2
19
OUT3
18
OUT4
12 DIAGNOSTIC
OUTPUT
11
S-GND
D05AU1612
April 2005
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
REV. 1
1/19
1 page  
4 LAYOUT
Figure 6. Component Layout
Figure 7. Components Side
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Figure 8. Solder Side
STA540SA
5/19
5 Page 
STA540SA
7.3 NOTE:
The values found gives an heatsinker that is dimensioned to sustain the max. dissipated power, but as
explained in the Application Note (AN1965) the heatsinker can be smaller when we consider the real ap-
plication where a musical program is used.
If we consider the so called "Average Listening Dissipated Power" concept we obtain a value that is about
40% less respect the Pdmax (see AN1965 for reference).
So in the examples (A) and (B) we will obtain the value for the Average Listening Dissipated Power that
is respectively:
– Example (A) : 10.5 W- 40% = 6.3W that gives Rth j-amb = 13.8 °C/W
– Example (B) : 21 W - 40% = 12.6W that gives Rth j-case = 5.9 °C/W
In figure 26 is shown the Power Derating curve for the device
Figure 29. Power Derating Curve
Pd(W) 30
25
20
15
10
5
0
0
3
4
1
2
1) Infinite
2) 3.5C/W
3) 5C/W
4) 7C/W
20 40 60 80 100 120 140 160
Tamb(C)
8 GENERAL STRUCTURE
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8.1 High Application Flexibility
The availability of 4 independent channels makes it possible to accomplish several kinds of applications
ranging from 4 speakers stereo (F/R) to 2 speakers bridge solutions.
In case of working in single ended conditions the polarity of the speakers driven by the inverting amplifier
must be reversed respect to those driven by non inverting channels. This is to avoid phase inconveniences
causing sound alterations especially during the reproduction of low frequencies.
8.2 Easy Single Ended to Bridge Transition
The change from single ended to bridge configurations is made simply by means of a short circuit across
the inputs, that is no need of further external components.
8.3 Gain Internally Fixed to 20dB in Single Ended, 26dB in Bridge
Advantages of this design choice are in terms of:
■ componentsand space saving
■ output noise, supply voltage rejection and distortion optimization.
11/19
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| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet STA540SA.PDF ] | |
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