STABP01

STABP01 DIGITAL PROCESSOR ■ BASH® LICENCE REQUIRED DESCRIPTION ) s ( t c u d o ) r s ( P t c e t u e d l o o r s P b e O t e l ) o s ( s t b c u O d o ) r s P ( t c e t u e l d o o r s P b O e t e l o s b O 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 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 Ptot Power Dissipation at Tamb Tstg Storage Ambient Temperature TL Lead Temperature (soldering 10s) Top Operating Temperature Range Symbol Rth j-amb Parameter BUFFER OUT s ( t c COMP e t e ol bs O 1 )- VFB 2 b O 20 ete 18 4 17 5 DEAD TIME 6 (s) so RECTIFIER DUTY ACCEL ONE SHOT 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 du ct CLOCK(RT/CT) 10 D00AU1217B TYPICAL APPLICATION CIRCUIT t e l o REFERENCE SIGNAL s b O STABP01 PROCESSOR PROTECTION SIGNAL POWER SUPPLY BUCK CONVERTER STA575 POWER AMP D00AU1218 AUDIO INPUT uc d o r P e let FAST ATTACK b O 16 DIP20 95 BUFFER IN 19 3 CURRENT SENSE o r P e AC Pr l o s PIN CONNECTION Pr ct u d o SO20 Thermal Resistance junction-ambient soldered on PCB u d o °C -25 to 85 V+ (s) 300 THERMAL DATA 2/7 Value 90 °C ) s t( Unit °C/W 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