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200W MONO BASH POWER AMPLIFIER
STA5150
200W MONO
POWER AMPLIFIER
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MONOCHIP BRIDGE MONO AMPLIFIER FOR
BASH ® ARCHITECTURE
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160W OUTPUT POWER @ R L = 4
W,
THD = 0.5%
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200W OUTPUT POWER @ R L = 4
W,
THD = 10%
FLEXIWATT27
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HIGH DYNAMIC PREAMPLIFIER INPUT
STAGES
TRANSISTOR POWER PROTECTION
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EXTERNAL PROGRAMMABLE FEEDBACK
TYPE COMPRESSORS
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ABSOLUTE OUTPUT CURRENT LIMIT
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AC COUPLED INPUT TO CLASS AB BRIDGE
OUTPUT AMPLIFIER
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INTEGRATED THERMAL PROTECTION
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POWER SUPPLY OVER VOLTAGE
PROTECTION
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PRECISION RECTIFIERS TO DRIVE THE
DIGITAL CONVERTER
FLEXIWATT POWER PACKAGE WITH 27 PIN
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ON-OFF SEQUENCE/ TIMER WITH MUTE
AND STANDBY
BASH® LICENCE REQUIRED
DESCRIPTION
The STA5150 is a fully integrated power module de-
signed to implement a BASH® amplifier when used
in conjunction with STABP01 digital processor.
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PROPORTIONAL OVER POWER OUTPUT
CURRENT TO LIMIT THE DIGITAL
CONVERTER
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ABSOLUTE POWER BRIDGE OUTPUT
BLOCK DIAGRAM
+VS
G N D
-V S
OUT_ PRE
TR K
PWR _ INP
ABSOLUTE
VALUE
BLOCK
CD+P
+
-
+2
OUTP
IN_PRE
D G
+2
OUTP
COMPRESSOR
OUTPUT BRIDGE
CD-P
V/l
ATT_REL
CD+
S1
PEAK
DETECTOR
SOA
DETECTOR
OVER
VOLTAGE
PROTECTION
PROT.
Ict
THRESH
TRK_OUT
THERMAL
PROTECTION
TURN-
ON/OFF
SEQUENCE
STBY/MUTE
CD+N
-1
OUTN
-1
OUTN
OUTPUT BRIDGE
CD-N
D01AU1280
July 2003
1/14
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STA5150
DESCRIPTION (continued)
Notice that normally only one Digital Converter is needed to supply a stereo or multi-channel amplifier system,
therefore most of the functions implemented in the circuit have summing outputs
The signal circuits are biased by fixed negative and positive voltages referred to Ground. Instead the final stag-
es of the output amplifiers are supplied by two external voltages that are following the audio signal . In this way
the headroom for the output transistors is kept at minimum level to obtain a high efficiency power amplifier.
The Compressor circuits, one for each channel, performs a particular transfer behavior to avoid the dynamic
restriction that an adaptive system like this requires. To have a high flexibility the attack / release time and the
threshold levels are externally programmable. The tracking signal for the external digital converter is generated
from the Absolute Value block that rectifies the audio signal present at the compressor output. The outputs of
these blocks are decoupled by a diode to permit an easy sum of this signal for the multichannel application. The
output power bridges have a dedicated input pin to perform an AC decoupling to cancel the compressor output
DC offset. The gain of the stage is equal to 4 (+12dB). A sophisticated circuit performs the output transistor pow-
er detector that , with the digital converter, reduces the power supply voltage . Moreover, a maximum current
output limiting and the over temperature sensor have been added to protect the circuit itself. The external volt-
age applied to the STBY/MUTE pin forces the two amplifiers in the proper condition to guarantee a silent turn-
on and turn-off.
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
+V s
Positive supply voltage referred to pin 13 (GND)
30
V
-V s
Negative supply voltage referred to pin 13 (GND)
-24
V
V CD+
Positive supply voltage tracking rail referred to pin 13 (GND)
22
V
V CD+
Positive supply voltage operated to Vs+ (1)
0.3
V
V CD-
Negative supply voltage referred to -Vs (1)
-0.3
V
V CD-
Negative supply voltage tracking rail referred to pin 13 (GND)
-22
V
V Att_Rel
Pin 3 Negative & Positive maximum voltage reffered to GND (pin
13)
-0.5 to +20
V
V Pwr_Imp VTrk Pin 7, 10 Negative & Positive maximum voltage referred to
GNC (pin 13)
-20 to +20
V
V In_pre
Pin 8 Negative & Positive maximum voltage referred to GND (pin
13)
-0.5 to +0.5
V
V threshold Pin 17 Negative & Positive maximum voltage referred to GND (pin
13)
-7 to +0.5
V
I stb-max
Pin 11 maximum input current (Internal voltage clamp at 5V)
500
m
A
V stbymute Pin 11 negative maximum voltage referred to GND (pin 13)
-0.5
V
Notes: 1. V CD- must not be more negative than -Vs and V CD+ must not be more positive than +V S
THERMAL DATA
Symbol
Parameter
Value
Unit
T j
Max Junction temperature
150
°C
R th j_case Thermal Resistance Junction to case .............................. .. max
1
°
C/W
2/14
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STA5150
OPERATING RANGE
Symbol
Parameter
Value
Unit
+V s
Positive supply voltage
+20 to +32
V
-V s
Negative supply voltage
-10 to -24
V
V s+
Delta positive supply voltage
5V
£
(Vs+ - VCD+)
£
10V
V
V CD+
Positive supply voltage tracking rail
+3 to 20.7
V
V CD-
Negative supply voltage tracking rail
-20.7 to -3
V
I in_Max
Current at pin In_Pre related to compressor behaviour
-1 to +1
mA peak
V trheshold Voltage at pin Threshold
-5 to 0
V
T amb
Ambient Temperature Range
0 to 70
°C
I sb_max
Pin 11 maximum input current (Internal voltage clmp at 5V)
200
m
A
PIN CONNECTION
1
27
D01AU1281
3/14
D
29275798.078.png
STA5150
PIN FUNCTION
N°
Name
Description
1
-Vs
Negative Bias Supply
2
CD-P
Channel P Time varying tracking rail negative power supply
3
Att_Rel
Attack release rate
4
OutP
Channel P
5
OutP
Channel P
6
CD+P
Channel P positive power supply
7
Pwr_Inp
Input to power stage
8
In_pre
Pre-amp input (virtual ground)
9
Out_pre
Output channel
10
Trk
Absolute value block input
11
Stby/mute
Standby/mute input voltage control
12
Protection
Protection signal for STABP01 digital processor
13
Gnd
Analog Ground
14
+Vs
Positive Bias Supply
15
CD+
Time varying tracking rail positive power supply
16
Trk_out
Reference output for STABP01 digital processor
17
Threshold
Compressor threshold input
18
N.C.
19
N.C.
20
N.C.
21
N.C.
22
CD+N
Channel N positive power supply
23
OutN
Channel N
24
OutN
Channel N
25
N.C.
26
CD-N
Channel N Time varying tracking rail negative power supply
27
-Vs
Negative Bias Supply
4/14
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STA5150
, external components at the nominal value f = 1KHz, Tamb = 25°C unless otherwise specified
Symbol
W
Parameter
Test Condition
Min. Typ. Max.
Unit
PREAMPLIFIER AND COMPRESSOR
V out clamp Maximum Voltage at Out_pre pin
10
11
12
Vpeak
I in
Audio input current
0.8
mA
V control Voltage at Attack_Release pin
Attenuation = 0dB
Attenuation = 6dB
Attenuation = 26dB
0.35
6
0
0.5
9
0.65
12
V
V
V
VC omp_
Th
Input voltage range for the
compression
-5
-1
V
Z th
Input impedance of Threshold pin
100
K
W
Voffset Output Offset at Out_pre pin with: V CRT = 0V; Attenuation = 0dB
V CRT = 0.5V; Attenuation = 6dB
V CRT = 9V; Attenuation = 26dB
-10
-250
-450
10
250
450
mV
mV
mV
THD
Distortion at Out_pre:
V CRT = 0V; Attenuation = 0dB
V CRT = 0.5V; Attenuation = 6dB
V CRT = 9V; Attenuation = 26dB
0.01
%
%
%
5
5
EN
Noise at Out_pre pin :
V CRT = 0V; Attenuation = 0dB
V CRT = 0.5V; Attenuation = 6dB
V CRT = 9V; Attenuation = 26dB
10 (2)
50
60
m
V
m
V
m
V
I ct
Attack time current at pin
Attack_release
1.5
mA
2. This value is due to the thermal noise of the external resistors R r and R i .
TRACKING PARAMETERS
G trk
Tracking reference voltage gain
13
14
15
V
V trk_out Tracking ref. output voltage
0
20
V
I trk_out Current capability
5
6
7
mA
Z trk_in Input impedance (T rk )
1
M
W
OUTPUT BRIDGE
G out
Half Output bridge gain
5.5
6
6.5
dB
G ch
Output bridge differential gain
11
12
13
dB
D
G ch Output bridges gain mismatch
-1
1
dB
P out
Continuous Output Power
THD = 0.5%
THD = 10%
150
190
160
200
W
W
THD
Total harmonic distortion of the
output bridge
Po = 5W
0.01
%
f = 20Hz to 20KHz; Po = 50W
0.1
%
V Off
Output bridge D.C. offset
50
mV
EN
Noise at Output bridge pins
f = 20Hz to 20KHz; Rg = 50
W
12
m
V
Z br_in Input impedance
100
140
180
K
W
5/14
ELECTRICAL CHARACTERISTCS (Test Condition: Vs+ = 28V, Vs- = -24V, V CD+ = 20V, V CD- = -20V,
R L = 4
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