KBA2338 Datasheet | Kingbor Technology

Description The k B2338A is a high efficiency, 3W mono class-D audio power amplifier. A low noise, filterless PWM architecture eliminates the output filter, reducing external ponent count, system cost, and simplifying design. Operating in a single 5V supply, k B2338A is capable of driving 4ȍ speaker load at a continuous average output of 3W/10% THD+N or 2W/1% THD+N. The k B2338A has high efficiency with speaker load pared to a typical class AB amplifier. With a 3.6V supply driving an 8ȍ speaker , the efficiency for a 400m W power level is 88%. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the k B2338A. The gain of k B2338A is externally configurable which allows independent gain control from multiple sources by summing signals from seperate sources. The k B2338A is available in space-saving WCSP and DFN packages. MARKING DIAGRAMS A3 C3 1 9ïPIN FLIPïCHIP WCSP A1 A20 5 C1 8 1 8 PIN UDFN 2x2.2 SD NC INP INM 1 2 3 4 8 7 6 5 OUTM GND VP OUTP Features z z Unique Modulation Scheme Reduces EMI Emissions Efficiency at 3.6V With an 8-ȍ Speaker: í 88% at 400 m W í 80% at 100 m W Low 2.38-m A Quiescent Current and 0.5-µA Shutdown Current 2.5V to 6.0V Wide Supply Voltage Optimized PWM Output Stage Eliminates LC Output Filter Improved PSRR (í72 d B) Eliminates Need for a Voltage Regulator Fully Differential Design Reduces RF Rectification and Eliminates Bypass Capacitor Improved CMRR Eliminates Two Input Coupling Capacitors Internally Generated 250-k Hz Switching Frequency Integrated Pop and Click Suppression Circuitry 1.5mm u 1.5mm Wafer Chip Scale Package (WCSP) and 3mm u 3mm DFN-8 package Ro HS pliant and 100% lead(Pb)-free Applications - - - - Cellular Phone Portable Electronic Devices PDAs and Smart Phones Portable puter z z z z z z z z z z Ordering Information Order Number k BA2338B-UDFN k BA2338-WCSP Package Type UDFN-8 WCSP-9 Marking xxxx A20 5 Operating Temperature range -40 °C to 85°C -40 °C to 85°C March 2007 Kingbor...