September This is preliminary information on a new product now in development Details are subject to change without notice

Stmicroelectronics

Description

Niveau: Supérieur, Licence, Bac+3
1/14 STA5150 September 2002 This is preliminary information on a new product now in development. Details are subject to change without notice. n MONOCHIP BRIDGE MONO AMPLIFIER FOR BASH® ARCHITECTURE n 160W OUTPUT POWER @ RL = 4 ?, THD = 0.5% n 200W OUTPUT POWER @ RL = 4 ?, THD = 10% n HIGH DYNAMIC PREAMPLIFIER INPUT STAGES n EXTERNAL PROGRAMMABLE FEEDBACK TYPE COMPRESSORS n AC COUPLED INPUT TO CLASS AB BRIDGE OUTPUT AMPLIFIER n PRECISION RECTIFIERS TO DRIVE THE DIGITAL CONVERTER n ON-OFF SEQUENCE/ TIMER WITH MUTE AND STANDBY n PROPORTIONAL OVER POWER OUTPUT CURRENT TO LIMIT THE DIGITAL CONVERTER n ABSOLUTE POWER BRIDGE OUTPUT TRANSISTOR POWER PROTECTION n ABSOLUTE OUTPUT CURRENT LIMIT n INTEGRATED THERMAL PROTECTION n POWER SUPPLY OVER VOLTAGE PROTECTION n FLEXIWATT POWER PACKAGE WITH 27 PIN n 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. FLEXIWATT27 PRODUCT PREVIEW 200W MONO POWER AMPLIFIER BLOCK DIAGRAM ABSOLUTE VALUE BLOCK OUTPUT BRIDGE PEAK DETECTOR OVER VOLTAGE PROTECTION SOA DETECTOR TURN- ON/OFF SEQUENCE THERMAL PROTECTION COMPRESSOR D G +2 +2 + - V/l S1 Ict OUTPUT BRIDGE CD-N CD+N STBY/MUTE PROT.

• output


• µv


• mv


• maximum input


• voltage tracking


• power supply


• pin


• pre pin

Sujets

• Junction
• Current
• Output
• Power supply

Informations

• Publié par: vehot
• Nombre de lectures: 59
• Langue: English

Extrait

STA5150
200W MONO POWER AMPLIFIER
PRODUCT PREVIEW
MONOCHIP BRIDGE MONO AMPLIFIER FOR
®BASH ARCHITECTURE
160W OUTPUT POWER @ R = 4 W,L
THD = 0.5%
200W OUTPUT POWER @ R = 4 W,L
THD = 10%
FLEXIWATT27
HIGH DYNAMIC PREAMPLIFIER INPUT
STAGES
TRANSISTOR POWER PROTECTION
EXTERNAL PROGRAMMABLE FEEDBACK
ABSOLUTE OUTPUT CURRENT LIMITTYPE COMPRESSORS
INTEGRATED THERMAL PROTECTIONAC COUPLED INPUT TO CLASS AB BRIDGE
POWER SUPPLY OVER VOLTAGE OUTPUT AMPLIFIER
PROTECTION PRECISION RECTIFIERS TO DRIVE THE
DIGITAL CONVERTER FLEXIWATT POWER PACKAGE WITH 27 PIN
ON-OFF SEQUENCE/ TIMER WITH MUTE BASH® LICENCE REQUIRED
AND STANDBY
DESCRIPTION
PROPORTIONAL OVER POWER OUTPUT
The STA5150 is a fully integrated power module de-
CURRENT TO LIMIT THE DIGITAL
signed to implement a BASH® amplifier when used
CONVERTER
in conjunction with STABP01 digital processor.
ABSOLUTE POWER BRIDGE OUTPUT
BLOCK DIAGRAM
+VS GND VS OUT_ PRE TRK PWR_INP
ABSOLUTE CD+P
+ VALUE
+2 OUTP
BLOCK-
IN_PRE G +2 OUTP
COMPRESSOR
OUTPUT BRIDGE CD P
V/l
ATT_REL
CD+
PEAK
S1
DETECTOR
SOA
PROT.
DETECTOROVER
Ict VOLTAGE
PROTECTION
THRESH
TURN TRK_OUT THERMAL
ON/OFF STBY/MUTE
PROTECTION SEQUENCE
CD+N
1 OUTN
1 OUTN
OUTPUT BRIDGE CD N
D01AU1280
September 2002 1/14
This is preliminary information on a new product now in development. Details are subject to change without notice.
DnnnnnnnnnnnnnnnSTA5150
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 Positive supply voltage referred to pin 13 (GND) 30 Vs
-V Negative supply voltage referred to pin 13 (GND) -24 Vs
V Positive supply voltage tracking rail referred to pin 13 (GND) 22 VCD+
(1)V 0.3 VCD+ Positive supply voltage operated to Vs+
(1) -0.3 VVCD- Negative supply voltage referred to -Vs
V Negative supply voltage tracking rail referred to pin 13 (GND) -22 VCD-
V Pin 3 Negative & Positive maximum voltage reffered to GND (pin -0.5 to +20 VAtt_Rel
13)
V VTrk Pin 7, 10 Negative & Positive maximum voltage referred to -20 to +20 VPwr_Imp
GNC (pin 13)
V Pin 8 Negative & Positive maximum voltage referred to GND (pin -0.5 to +0.5 VIn_pre
13)
V Pin 17 Negative & Positive maximum voltage referred to GND (pin -7 to +0.5 Vthreshold
13)
I Pin 11 maximum input current (Internal voltage clamp at 5V) 500 Astb-max
V Pin 11 negative maximum voltage referred to GND (pin 13) -0.5 Vstbymute
Notes: 1. V must not be more negative than -Vs and V must not be more positive than +VCD- CD+ S
THERMAL DATA
Symbol Parameter Value Unit
T Max Junction temperature 150 °Cj
R Thermal Resistance Junction to case .............................. ..max 1 ?C/Wth j_case
2/14
mSTA5150
OPERATING RANGE
Symbol Parameter Value Unit
+V Positive supply voltage +20 to +32 Vs
-V Negative supply voltage -10 to -24 Vs
V Delta positive supply voltage 5V £ (Vs+ - VCD+) £ 10V Vs+
V Positive supply voltage tracking rail +3 to 20.7 VCD+
V Negative supply voltage tracking rail -20.7 to -3 VCD-
I Current at pin In_Pre related to compressor behaviour -1 to +1 mA peakin_Max
V Voltage at pin Threshold -5 to 0 Vtrheshold
T Ambient Temperature Range 0 to 70 °Camb
I Pin 11 maximum input current (Internal voltage clmp at 5V) 200 Asb_max
PIN CONNECTION
1 27
D01AU1281
3/14
Dm
V
S
CD P
ATT REL
OUTP
OUTP
CD+P
PWR_INP
IN_PRE
OUT_PRE
TRK
STBY/MUTE
PROTECTION
GND
+V
S
CD+
TRK_OUT
THRESHOLD
N.C.
N.C.
N.C.
N.C.
CD+N
OUTN
OUTN
N.C.
CD N
VsSTA5150
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
4/14STA5150
ELECTRICAL CHARACTERISTCS (Test Condition: Vs+ = 28V, Vs- = -24V, V = 20V, V = -20V, CD+ CD-
R = 4 , external components at the nominal value f = 1KHz, Tamb = 25°C unless otherwise specified L
Symbol Parameter Test Condition Min. Typ. Max. Unit
PREAMPLIFIER AND COMPRESSOR
V Maximum Voltage at Out_pre pin 10 11 12 Vpeakout clamp
I Audio input current 0.8 mAin
V Voltage at Attack_Release pin Attenuation = 0dB 0 Vcontrol
Attenua 6dB 0.35 0.5 0.65 V
Attenuation = 26dB 6 9 12 V
VC Input voltage range for the -5 -1 Vomp_
Th compression
Z Input impedance of Threshold pin 100 Kth
Voffset Output Offset at Out_pre pin with: V = 0V; Attenuation = 0dB -10 10 mVCRT
V = 0.5V; Attenuation = 6dB -250 250 mVCRT
-450 450 mVV = 9V; Attenuation = 26dBCRT
THD Distortion at Out_pre: V = 0V; Attenuation = 0dB 0.01 %CRT
5 %V = 0.5V; Attenuation = 6dBCRT
5 %V = 9V; Attenuation = 26dBCRT
(2)EN Noise at Out_pre pin : V = 0V; Attenuation = 0dB VCRT 10
VV = 0.5V; Attenuation = 6dBCRT 50
VV = 9V; Attenuation = 26dB 60CRT
I Attack time current at pin 1.5 mAct
Attack_release
2. This value is due to the thermal noise of the external resistors R and R .r i
TRACKING PARAMETERS
G Tracking reference voltage gain 13 14 15 Vtrk
Tracking ref. output voltage 0 20 VVtrk_out
I Current capability 5 6 7 mAtrk_out
Z Input impedance (T)1Mtrk_in rk
OUTPUT BRIDGE
G Half Output bridge gain 5.5 6 6.5 dBout
G Output bridge differential gain 11 12 13 dBch
G Output bridges gain mismatch -1 1 dBch
P Continuous Output Power THD = 0.5% 150 160 Wout
THD = 10% 190 200 W
THD Total harmonic distortion of the Po = 5W 0.01 %
output bridge
f = 20Hz to 20KHz; Po = 50W 0.1 %
V Output bridge D.C. offset 50 mVOff
EN Noise at Output bridge pins f = 20Hz to 20KHz; Rg = 50 12 V
Z Input impedance 100 140 180 Kbr_in
5/14
WDmWmWmWmWSTA5150
ELECTRICAL CHARACTERISTCS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
R Output power Rdson I = 1A 100 200 mdson O
OLG Open Loop Voltage Gain 100 dB
GB Unity Gain Bandwidth 1.4 MHz
SR Slew Rate 7V/s
PROTECTION
V Stby voltage range 0 0.8 Vstby
V Mute voltage range 1.6 3 Vmute
V Play voltage range 4 5 Vplay
T First Over temperature threshold 130 °Ch1
T Second Over temperature 150 °Ch2
threshold
+ -Unbal. Upper Unbalancing ground 5VReferred to (CD - CD )/2
Ground threshold
+ -Unbal. Lower Unbalancing ground -5 VReferred to (CD - CD )/2
Ground threshold
UV Under voltage threshold |Vs+| + |Vs-| 20 Vth
P Power dissipation threshold for I = 50 A; @ Vds = 10V 64 78 Wd_reg. prot
system regulation
P Switch off power dissipation @ Vds = 10V 120 Wd_max
threshold
I Protection current slope for Pd > Pd 400 A/Wprot reg
I Limiting Current threshold 12 14 16 Alct
I+Vs Positive supply current Stby (Vstby/mute pin =