IS31AP4066D CLASS-AB AUDIO AMPLIFIER DESCRIPTION RECOMMENDED EQUIPMENT The IS31AP4066D demo board is a fully assembled 5.0V, 2A power supply and tested PCB that uses the IS31AP4066D Class-AB Audio source (i.e. MP3 player, Notebook PC, etc.) dual bridge-connected audio power amplifier. 8 or larger speaker Designed to drive speaker impedance of 8 or larger. The demo board provides dual BTL output, capable of delivering 1.6W into an 8 speaker at 5V. ABSOLUTE MAXIMUM RATINGS 5.5V power supply 8 speaker FEATURES Caution: Do not exceed the conditions listed above otherwise Supply voltage range from 2.7V to 5.5V the board will be damaged. Delivers 1.6W into an 8 speaker at 5V supply (THD+N=10%) Delivers 1.3W into an 8 speaker at 5V supply PROCEDURE (THD+N=1%) The IS31AP4066D demo board is fully assembled and Available in QFN-16 (3mm 3mm) package tested. Follow the steps listed below to verify board operation. QUICK START Caution: Do not turn on the power supply until all connections are completed. 1) Connect 8 (or larger) speakers across the (OUTA+, OUTA-) terminal and (OUTB+, OUTB-) terminal. Or connect speakers to the connector (OUTA, OUTB). 2) Connect the ground terminal of the power supply to the GND and the positive terminal to the VCC. Or connect DC power to connector (DC CON). 3) Connect the audio sources to the INA terminal (left channel) and INB terminal (right channel) or connect audio sources to the connector (AUDIO IN). 4) Turn on the power supply. 5) Turn on the audio sources. Figure 1: Photo of IS31AP4066D Evaluation Board ORDERING INFORMATION Part No. Temperature Range Package IS31AP4066D-QFLS2-EB -40C to +85C (Industrial) QFN-16, Lead-free Table 1: Ordering Information For pricing, delivery, and ordering information, please contacts Lumissils analog marketing team at analog Lumissil.com or (408) 969-6600. Lumissil Microsystems www.lumissil.com 1 Rev. A, 01/09/2015 IS31AP4066D CLASS-AB AUDIO AMPLIFIER DETAILED DESCRIPTION HIGH-PASS FILTER The IS31AP4066D demo board features the The input capacitors C (C , C ) and input resistors R I 5 6 I IS31AP4066D Class-AB power amplifier IC, designed (R, R) form a high-pass filter with the corner 1 2 to drive speaker impedance of 8 or larger. frequency, f determined in Equation (2). C 1 f (2) c CUSTOMIZING THE GAIN 2R C I I The IS31AP4066D demo board is shipped with a gain of 18.3dB and is set by resistors R (R , R ) and R (R , I 1 2 F 3 SHUTDOWN MODE R ). Change resistors R and R to reconfigure the gain 4 I F of the board .Gain determined in Equation (1) and refer Jumper (J1) controls the shutdown pin of the to IS31AP4066D data sheet for more detail. IS31AP4066D IC. Connect the shunt across pin 1 and 2 of the jumper (J1) to enter the shutdown mode of the 2 R V F Gain (1) board. R V I R3 82K VCC VCC C1 C2 10uF R5 C3 0.1uF 100K J1 0.1uF CLOSE=SD C5 R1 4 3 INA INA -OUTA 20K 15nF 1 +OUTA C4 SPEAKER 8 BYPASS U1 1uF 12 +OUTB C6 R2 9 10 INB INB -OUTB SPEAKER 20K 15nF IS31AP4066D R4 82K Figure 2: IS31AP4066D Application Circuit Lumissil Microsystems www.lumissil.com 2 Rev. A, 01/09/2015 5 11 GND VDD 6 2 GND VDD 7 GND 13 GND 14 GND 16 15 GND SD