STA5150 STMICROELECTRONICS | Alldatasheet
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■ MONOCHIP BRIDGE MONO AMPLIFIER FOR BASH ® ARCHITECTURE ■ 160W OUTPUT POWER @ R L = 4 Ω, THD = 0.5% ■ 200W OUTPUT POWER @ R L = 4 Ω, THD = 10% ■ HIGH DYNAMIC PREAMPLIFIER INPUT STAGES ■ EXTERNAL PROGRAMMABLE FEEDBACK TYPE COMPRESSORS ■ AC COUPLED INPUT TO CLASS AB BRIDGE OUTPUT AMPLIFIER ■ PRECISION RECTIFIERS TO DRIVE THE DIGITAL CONVERTER ■ ON-OFF SEQUENCE/ TIMER WITH MUTE AND STANDBY ■ PROPORTIONAL OVER POWER OUTPUT CURRENT TO LIMIT THE DIGITAL CONVERTER ■ ABSOLUTE POWER BRIDGE OUTPUT TRANSISTOR POWER PROTECTION ■ ABSOLUTE OUTPUT CURRENT LIMIT ■ INTEGRATED THERMAL PROTECTION ■ POWER SUPPLY OVER VOLTAGE PROTECTION ■ FLEXIWATT POWER PACKAGE WITH 27 PIN ■ 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 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 DG V/l Ict OUTPUT BRIDGE CD-N CD+N STBY/MUTE PROT. CD+ CD-P OUTP OUTP CD+P IN_PRE ATT_REL TRK_OUT THRESH PWR_INPTRKOUT_ PRE -VSGND+VS D01AU1280 OUTN OUTN-1
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 Notes: 1. VCD- must not be more negative than -Vs and VCD+ must not be more positive than +VS THERMAL DATA Symbol Parameter Value Unit +V s Positive supply voltage referred to pin 13 (GND) 30 V -Vs Negative supply voltage referred to pin 13 (GND) -24 V VCD+ Positive supply voltage tracking rail referred to pin 13 (GND) 22 V VCD+ Positive supply voltage operated to Vs+(1) 0.3 V VCD- Negative supply voltage referred to -Vs (1) -0.3 V VCD- Negative supply voltage tracking rail referred to pin 13 (GND) -22 V VAtt_Rel Pin 3 Negative & Positive maximum voltage reffered to GND (pin 13) -0.5 to +20 V VPwr_Imp VT rk Pin 7, 10 Negative & Positive maximum voltage referred to GNC (pin 13) -20 to +20 V VIn_pre Pin 8 Negative & Positive maximum voltage referred to GND (pin 13) -0.5 to +0.5 V Vthreshold Pin 17 Negative & Positive maximum voltage referred to GND (pin 13) -7 to +0.5 V Istb-max Pin 11 maximum input current (Internal voltage clamp at 5V) 500 µA Vstbymute Pin 11 negative maximum voltage referred to GND (pin 13) -0.5 V Symbol Parameter Value Unit Tj Max Junction temperature 150 °C
Symbol Parameter Value Unit +V s Positive supply voltage +20 to +32 V -Vs Negative supply voltage -10 to -24 V ΔVs+ Delta positive supply voltage 5V ≤ (Vs+ - VCD+) ≤ 10V V VCD+ Positive supply voltage tracking rail +3 to 20.7 V VCD- Negative supply voltage tracking rail -20.7 to -3 V Iin_Max Current at pin In_Pre related to compressor behaviour -1 to +1 mA peak Vtrheshold Voltage at pin Threshold -5 to 0 V Tamb Ambient T emperature Range 0 to 70 °C Isb_max Pin 11 maximum input current (Internal voltage clmp at 5V) 200 µA D01AU1281 CD-P -VS ATT-REL OUTP OUTP CD+P PWR_INP IN_PRE OUT_PRE TRK STBY/MUTE PROTECTION GND S CD+ TRK_OUT THRESHOLD N.C. N.C. N.C. N.C. CD+N OUTN OUTN N.C. CD-N -Vs 1 27
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 T rk Absolute value block input
11 Stby/mute Standby/mute input voltage control
12 Protection Protection signal for ST ABP01 digital processor
13 Gnd Analog Ground
14 +Vs Positive Bias Supply
15 CD+ Time varying tracking rail positive power supply
16 T rk_out Reference output for ST ABP01 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
ELECTRICAL CHARACTERISTCS (Test Condition: Vs+ = 28V, Vs- = -24V, VCD+ = 20V, VCD- = -20V, R L = 4Ω , external components at the nominal value f = 1KHz, Tamb = 25°C unless otherwise specified Symbol Parameter Test Condition Min. Typ. Max. Unit PREAMPLIFIER AND COMPRESSOR Vout clamp Maximum Voltage at Out_pre pin 10 11 12 Vpeak Iin Audio input current 0.8 mA Vcontrol Voltage at Attack_Release pin Attenuation = 0dB Attenuation = 6dB Attenuation = 26dB 0.35 0.5 0.65 V V V VC omp_ Th Input voltage range for the compression -5 -1 V Zth Input impedance of Threshold pin 100 K Ω Voffset Output Offset at Out_pre pin with: VCRT = 0V; Attenuation = 0dB VCRT = 0.5V; Attenuation = 6dB VCRT = 9V; Attenuation = 26dB -10 -250 -450 250 450 mV mV mV THD Distortion at Out_pre: V CRT = 0V; Attenuation = 0dB VCRT = 0.5V; Attenuation = 6dB VCRT = 9V; Attenuation = 26dB 0.01 EN Noise at Out_pre pin : V CRT = 0V; Attenuation = 0dB VCRT = 0.5V; Attenuation = 6dB VCRT = 9V; Attenuation = 26dB 10(2) µV µV µV Ict Attack time current at pin Attack_release 1.5 mA 2. This value is due to the thermal noise of the external resistors Rr and Ri. TRACKING P ARAMETERS G trk T racking reference voltage gain 13 14 15 V Vtrk_out T racking ref. output voltage 0 20 V Itrk_out Current capability 5 6 7 mA Ztrk_in Input impedance (Trk)1 M Ω OUTPUT BRIDGE G out Half Output bridge gain 5.5 6 6.5 dB G ch Output bridge differential gain 11 12 13 dB ΔG ch Output bridges gain mismatch -1 1 dB Pout Continuous Output Power THD = 0.5% THD = 10% 150 190 160 200 W W THD T otal harmonic distortion of the output bridge Po = 5W 0.01 % f = 20Hz to 20KHz; Po = 50W 0.1 % VOff Output bridge D.C. offset 50 mV EN Noise at Output bridge pins f = 20Hz to 20KHz; Rg = 50Ω 12 µV Zbr_in Input impedance 100 140 180 K Ω
R dson Output power Rdson I O = 1A 100 200 m Ω OLG Open Loop Voltage Gain 100 dB GB Unity Gain Bandwidth 1.4 MHz SR Slew Rate 7V / µs PROTECTION Vstby Stby voltage range 0 0.8 V Vmute Mute voltage range 1.6 3 V Vplay Play voltage range 4 5 V Th1 First Over temperature threshold 130 °C Th2 Second Over temperature threshold 150 °C Unbal. Ground Upper Unbalancing ground threshold Referred to (CD+ - CD-)/2 5V Unbal. Ground Lower Unbalancing ground threshold Referred to (CD+ - CD-)/2 -5 V UV th Under voltage threshold |Vs+| + |Vs-| 20 V Pd_reg. Power dissipation threshold for system regulation Iprot = 50µA; @ Vds = 10V 64 78 W Pd_max Switch off power dissipation threshold @ Vds = 10V 120 W Iprot Protection current slope for Pd > Pd reg 400 µA/W Ilct Limiting Current threshold 12 14 16 A I+Vs Positive supply current Stby (Vstby/mute pin = 0V) Mute (Vstby/mute pin = 2.5V) Play (Vstby/mute pin = 5V no signal) mA mA mA I-Vs Negative supply current Stby (Vstby/mute pin = 0V) Mute (Vstby/mute pin = 2.5V) Play (Vstby/mute pin = 5V no signal) mA mA mA ICD+ Positive traking rail supply current Stby (Vstby/mute pin = 0V) Mute (Vstby/mute pin = 2.5V) Play (Vstby/mute pin = 5V no signal) 100 110 110 µA mA mA ICD- Negative traking rail supply current Stby (Vstby/mute pin = 0V) Mute (Vstby/mute pin = 2.5V) Play (Vstby/mute pin = 5V no signal) 100 110 110 µA mA mA Symbol Parameter Test Condition Min. Typ. Max. Unit ELECTRICAL CHARACTERISTCS (continued)
in Mute mode the circuits are biased but the Speakers Outputs are forced to ground potential. These voltages can be get by the external RC network connected to Stby/Mute pin. condition has been detected. The RC network in these cases is used to delay the Normal operation restore. Table 1. Protection Implementation external resistor, but in case of high input signal or low power supply voltage, its gain could be reduced of 26dB. programmable by the external RC network connected to the Att_Rel pins.
Where G is the preamplifier gain without compression. (G = 2·Vthreshold/Vin) to maintain at steady state the output voltage equal 2*|Vthreshold| . Instead in the other region the compressor will be off (G = 5). Figure 1. Compressor activation field
Figure 2. Compressor attenuation vs. input amplitude digital converter. The output voltage swing is internally limited, the gain is internally fixed to 14. rectification (between Out_pre and Trk pins). amplifier stages are driven by the output of the first stages respectively. To protect the output transistors of the power bridge a power detector is implemented (fig 3).
Figure 3. Power Protection Block Diagram does not respond quikly enough reducing the stress to less than 120W. When the currentthrough the sensing resistor, Rsense, reaches 14A (Voltage drop (CD+) - (CD+1) = 700mV). When the average junction temperature of the chip reaches 150°C. The output bridge is muted when the average junction temperature reaches 130°C.
Note: Vcontrol is the voltage at Att_Rel pin. Name Function Value Formula Ri Input resistor 10K Ω Rr Feedback resistor 50K Ω (|G| = 5, Ri = 10KΩ Cac AC Decoupling capacitor 100nF (fp = 16Hz, Rac =100KΩ ) Cct Capacitor for the attack time 2.2 µF (T attack = 13mSec, Vcontrol = 9V , Ict = 1.5mA) R3 Release constant time Resistor 470K Ω (t = 1 Sec. , Cct = 2.2 µF ) R4 Resistor for tracking input voltage filter 10KΩ R5 Resistor for tracking input voltage filter 56KΩ R6 Resistor for tracking input voltage filter 10KΩ C3 Capacitor for T racking input voltage filter 1nF C4 Dc decoupling capacitor 1 µF R7 Bias Resistor for Stby/Mute function 10KΩ R8 Stby/Mute constant time resistor 30K Ω R9 Mute resistor 30K Ω C5 Capacitor for Stby/Mute resistor 2.2 µF R10 = R11 Sensing resistor for SOA detector 50m Ω 5% 4W R12 Conversion resistor for threshold voltage 100KΩ C6 = C7 Power supply filter capacitor 100nF R15 = R16 Centering resistor 400 Ω , 1W C8 = C9 Tracking rail power supply filter 680nF R13 Protection 1K Ω R14 TRK_out 40K Ω C10 = C11 Power supply filter capacitor 470 µF , 63V C12 Feedback capacitor 100pF D1 Schottky diode SB360 R i Rr Rr G Rr ⋅= Cac 1 Cct attack Ict Rct τ
DIM. mm inch C 1.40 0.055 F (1) 0.57 0.022 H1 17.00 0.669 H2 12.80 0.503 H3 0.80 0.031 L4 5 0.197 L5 3.5 0.138 N 2.20 0.086 O 2 0.079 R 1.70 0.067 R1 0.5 0.02 R2 0.3 0.12 R3 1.25 0.049 R4 0.50 0.019 V 5˚ (T yp.) V1 3˚ (T yp.) V2 20˚ (Typ.) V3 45˚ (Typ.) (1): dam-bar protusion not included (2): molding protusion included Flexiwatt27 (vertical) G V V H F L FLEX27ME OL3 L4 N R C B M L5 R1 R1 E D A 7139011 Pin 1
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