IS31AP4088A DUAL 2.84W STEREO AUDIO AMPLIFIER PLUS HEADPHONE DRIVER January 2012 GENERAL DESCRIPTION KEY SPECIFICATIONS The IS31AP4088A is a dual bridge-connected audio P at 1% THD+N, V = 5V O DD power amplifier which, when connected to a 5V supply, R = 4 ----------------------------- 2.30W (Typ.) L will deliver 2.84W to a 4 load. R = 8 ----------------------------- 1.38W (Typ.) L P at 10% THD+N, V = 5V To simplify audio system design, the IS31AP4088A O DD combines dual bridge speaker amplifiers and stereo R = 4 ----------------------------- 2.84W (Typ.) L headphone amplifiers on one chip. R = 8 ----------------------------- 1.71W (Typ.) L P at 1% THD+N, V = 4V O DD The IS31AP4088A features a low-power consumption R = 4 ----------------------------- 1.40W (Typ.) shutdown mode and thermal shutdown protection. It L also utilizes circuitry to reduce clicks and pops during R = 8 ----------------------------- 0.89W (Typ.) L device turn-on. Shutdown current ------------------ 0.04 A (Typ.) Supply voltage range -------------- 2.7V ~ 5.5V QFN-16(4mm 4mm) package APPLICATIONS Cell phones, PDA, MP4, PMP FEATURES Portable and desktop computers Suppress click-and-pop Desktops audio system Thermal shutdown protection circuitry Multimedia monitors Stereo headphone amplifier mode Micro power shutdown mode TYPICAL APPLICATION CIRCUIT R2 20K VCC VCC C3 SHUTDOWN WORKING 1uF R5 1K 2,11 15 SHUTDOWN C5 100uF INA VDD BNC C1 R1 4 INA - -OUTA 3 20K 0.22uF + +OUTA 1 VCC - R7 100K + R8 100K 9 BYPASS HP Sense 14 C4 + 1uF PHONEJACK (STEREO) - +OUTB 12 INB + BNC C2 -OUTB 10 R3 8 INB - 20K R6 1K 0.22uF C6 100uF GND 5,6,7,13,16 R4 20K Figure 1 Typical Application Circuit Lumissil Microsystems www.lumissil.com 1 Rev.A, 12/21/2011 IS31AP4088A PIN CONFIGURATION Package Pin Configuration (Top View) +OUTA +OUTB 1 12 QFN-16 VDD VDD 2 11 -OUTA -OUTB 3 10 INA BYPASS 4 9 PIN DESCRIPTION No. Pin Description 1 +OUTA Left channel +output. 2,11 VDD Supply voltage. 3 -OUTA Left channel output. 4 INA Left channel input. 5~7,13,16 GND GND. 8 INB Right channel input. Bypass capacitor which provides the common mode 9 Bypass voltage. 10 -OUTB Right channel -output. 12 +OUTB Right channel +output. 14 Hp Sense Headphone sense control. 15 Shut down control, hold low for shutdown mode. Shutdown Thermal Pad Connect to GND. Lumissil Microsystems www.lumissil.com 2 Rev.A, 12/21/2011