STABP01 DIGITAL PROCESSOR ■ BASH® LICENCE REQUIRED DESCRIPTION The STABP01 processor is used to control the BASH® Digital Converter. When used in conjunction with BASH® amplifiers a fully integrated high efficiency power amplifier is realized. By analyzing the audio input, the Processor determines the appropriate on/off events and generates a digital pulse for the Digital Converter. The converter turns this pulse into a power signal that feeds the power amplifier. The feedback system allows the processor to constantly adapt to the audio signal and regenerate the digital pulse thereby maintaining a constant voltage across the output devices. DIP20 SO20 ORDERING NUMBERS: STABP01 (DIP20) STABP01D (SO20) BLOCK DIAGRAM VREF INTERNAL CIRCUIT ON 1V 10V UVLO: 7V = on 5V = off - Q R Q S 10V + - 1V POWER SUPPLY1 + SOFT SWITCH 250Hz Rt Q Q 1V CLOCK S R + Ct COMP + V+ - ERROR AMP - VFB COMP/3 D CURRENT SENSE COMPARATOR FAST ATTACK + CONTROL + SOFT SW RESET Q Q DEAD TIME POWER_VS2 + 1V DISCHARGE (RESET) TRANSISTOR OUTPUT R Q - GROUND2 PWM LATCH 10V ONE SHOT SIGNAL 17R - 1V S Q + CURRENT_SENSE BUFFER IN GROUND1 1V RESET + R CLK - BUFFER + 1V 2R FA IN OUTPUT - 1V 10V + R - CLK Q D Q RESET BUFFER OUT 1V - + OPEN DRAIN OUTPUT ONE SHOT DELAY 1V REC_OUT 2200pF 1V 2200pF 50K ONE SHOT 1V 20K DUTY ACCEL R162 10V C51 D00AU1219 December 2002 1/7 STABP01 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vs Supply Voltage 10.5 V Io Output Current ±0.6 A Eo Output Energy(capacitive load) 5 µJ Vi Analog Input Voltage -0.3 to 8 V Io Error Amplifier Output Sink Current 10 mA 500 mW -65 to 150 °C 300 °C -25 to 85 °C Ptot Power Dissipation at Tamb Tstg Storage Ambient Temperature TL Lead Temperature (soldering 10s) Top Operating Temperature Range THERMAL DATA Symbol Rth j-amb Parameter SO20 DIP20 Unit 95 90 °C/W Thermal Resistance junction-ambient soldered on PCB PIN CONNECTION BUFFER OUT 1 20 BUFFER IN VFB 2 19 FAST ATTACK V+ 3 18 RECTIFIER COMP 4 17 DUTY ACCEL CURRENT SENSE 5 16 ONE SHOT DEAD TIME 6 15 ONE SHOT DELAY POWER SUPPLY2 7 14 POWER SUPPLY1 MAIN OUTPUT 8 13 SOFT SW OUT GROUND2 9 12 GROUND1 11 SOFT SW RESET CLOCK(RT/CT) 10 D00AU1217B TYPICAL APPLICATION CIRCUIT REFERENCE SIGNAL STABP01 PROCESSOR PROTECTION SIGNAL AC 2/7 POWER SUPPLY BUCK CONVERTER STA575 POWER AMP D00AU1218 AUDIO INPUT STABP01 ELECTRICAL CHARACTERISTCS (Vs = 10V; Rt = 22kΩ; Ct = 2.2nF; t = 25°C unless otherwise specified) Symbol Parameter Test Conditions Min Typ Max Unit 225 250 300 kHz OSCILLATOR SECTION fs Initial Accuracy (*) Tj=25C, SW Out Off Ts Temperature Stability Tmin<Tamb<Tmax Amplitude Vpin10 Peak to Peak 5 % 0.5 V ERROR AMP SECTION Ib AVOL B Input Bias Current µA Open loop Gain 65 90 dB Unity Gain Bandwidth 0.7 1 MHz 60 70 dB SVR Supply Voltage Rejection ICMR Input Common Mode Range CMRR Common Mode Rejection Ratio OR 1 Output Voltage Range 6<Vs<10V 0 8 90 I = 1mA 0.5 V dB 8.5 V CURRENT SENSE SECTION Gv Gain V4/V5, V5 <1V, Duty Cycle = 80% 2.7 3 3.3 V/V V5 Maximum Input Signal V4 = 5V 0.9 1 1.1 V Ib Input Bias Current V5 <0.9V, 1 µA Odt Delay to Output (minimum output pulse) 150 300 ns 0.1 1.5 0.4 2.2 V V OUTPUT SECTION VOL Output Low Level Isink=20mA Isink=200mA VOH Output High Level Isource=20mA Isource=200mA tr Rise Time Tj=25°C CL=1nF 50 150 ns tf Fall Time Tj=25°C CL=1nF 50 150 ns 9.6 7.8 9.9 8.5 V V UNDER-VOLTAGE LOCKOUT SECTION UVstart Start Threshold 6.3 7 7.7 V UVstop Min Operating Voltage After Turn-on 4.5 5 5.5 V TOTAL STANDBY CURRENT Ist Start-up Current 0.5 1 mA Is Operating Supply Current 10 20 mA 3/7 STABP01 ELECTRICAL CHARACTERISTCS (continued) Symbol Parameter Test Conditions Min Typ Max Unit 1 µA BUFFER SECTION Ib Input Bias Current B Unity Gain Bandwidth SVR Supply Voltage Rejection ICMR Input Common Mode Range OR Output Range 6<Vs<10V I = 1mA 0.7 1 MHz 60 70 dB 0 9 V 0.5 8.5 V 0.4 2.2 V V SOFT SWITCH SECTION VOL Output Low Level Isink=20mA Isink=200mA VOH Output High Level Isource=20mA Isource=200mA tr Rise Time Tj=25°C CL=1nF 50 150 ns tf Fall Time Tj=25°C CL=1nF 50 150 ns Vreset 0.1 1.5 9.6 7.8 Reset Level 9.9 8.5 V V 1 V FAST ATTACK CONTROL SECTION Gdiff Differential Gain 16 18 20 V/V OSth Level for one shot 0.9 1 1.1 V OSDth Level for one shot delay 0.9 1 1.1 V I15leak Leakage pin 15 V15 = 0.8V 0.2 µA I17leak Leakage pin 17 V17 = 10V, V16 = 0V 0.2 µA (*) Rt, Ct = 1% precision component 4/7 STABP01 mm DIM. MIN. a1 0.254 B 1.39 TYP. inch MAX. MIN. TYP. MAX. 0.010 1.65 0.055 0.065 b 0.45 0.018 b1 0.25 0.010 D 25.4 1.000 E 8.5 0.335 e 2.54 0.100 e3 22.86 0.900 F 7.1 0.280 I 3.93 0.155 L OUTLINE AND MECHANICAL DATA 3.3 0.130 DIP20 Z 1.34 0.053 5/7 STABP01 mm inch OUTLINE AND MECHANICAL DATA DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 2.35 2.65 0.093 0.104 A1 0.1 0.3 0.004 0.012 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.009 0.013 D 12.6 13 0.496 0.512 E 7.4 7.6 0.291 0.299 e 1.27 0.050 H 10 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 L 0.4 1.27 0.016 0.050 SO20 K 0˚ (min.)8˚ (max.) L h x 45˚ A B e A1 K H D 20 11 E 1 0 1 SO20MEC 6/7 C STABP01 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. 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