IS31AP2010B 3W 5.0V MONO FILTER-LESS CLASS-D AUDIO POWER AMPLIFIER DESCRIPTION RECOMMENDED EQUIPMENT The IS31AP2010B demo board is a fully assembled 5.0V, 2A power supply and tested PCB that uses the IS31AP2010B Class-D Audio source (i.e. MP3 player, Notebook PC, etc.) power amplifier to drive a 4 speaker (or larger) in 8 or 4 speaker audio applications such as cellular handsets, the earpiece and mobile phones. Designed to operate ABSOLUTE MAXIMUM RATINGS from a 2.7V to 5.5V DC power supply, the demo board accepts a single-ended or differential input signal. The 5.5V power supply demo board provides a BTL output capable of Caution: Do not exceed the conditions listed above otherwise delivering 3W into a 4 speaker at 5V. the board will be damaged. FEATURES PROCEDURE Supply voltage range from 2.7V to 5.5V The IS31AP2010B demo board is fully assembled and Delivers 3W into a 4 speaker at 5V supply tested. Follow the steps listed below to verify board (THD+N=10%). operation. Delivers 1.68W into an 8 speaker at 5V supply Caution: Do not turn on the power supply until all connections (THD+N=10%) are completed. Available in UTQFN-9 package 1) Connect 4 (or larger) speaker across the OUT- terminal and OUT+ terminal. QUICK START 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 IN). 3) If the audio source is differential, remove jumper JP1, connect the negative of the audio source to the IN- terminal, and connect the positive of the audio source to IN+ terminal. 4) If the audio source is single-ended, connect the audio source to the IN+ terminal, and close jumper JP1 or connect audio source to the audio connector (AUDIO IN) and close jumper JP1. 5) Turn on the power supply. 6) Turn on the audio source. Figure 1: Photo of IS31AP2010B Evaluation Board ORDERING INFORMATION Part No. Temperature Range Package IS31AP2010B-UTLS2-EB -40C ~ +85C (Industrial) UTQFN-9, 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, 01/15/2015 IS31AP2010B 3W 5.0V MONO FILTER-LESS CLASS-D AUDIO POWER AMPLIFIER DETAILED DESCRIPTION HIGH-PASS FILTER The IS31AP2010B demo board features the The input capacitors C (C , C ) and input resistors R I 5 4 I IS31AP2010B Class-D power amplifier IC, designed to (R, R) form a high-pass filter with the corner 1 2 drive speaker impedance of 4 or larger. frequency, f determined in Equation (2). c 1 f (2) CUSTOMIZING THE GAIN c 2R C I I The IS31AP2010B demo board is shipped with a gain of 18.4dB and is set by resistors R (R , R ). Change I 1 2 SHUTDOWN MODE resistors R and R to reconfigure the gain of the board. 1 2 Gain determined in Equation (1) and refer to Jumper (JP2) controls the shutdown pin of the IS31AP2010B data sheet for more detail. IS31AP2010B IC. Connect the shunt across pin 1 and 2 of the jumper (JP2) to enter the shutdown mode of 2 150k V Gain (1) the board. R V I VCC R3 VCC 100K U1 VCC DC IN B1 VCC CLOSE=SD C1 C1 C2 C3 C2 10uF B2 SDB VCC 10uF 1uF 0.1uF JP2 A3 OUT- GND OUT- 10nF AUDIO OUT R1 36K AUDIO IN IN+ C4 A1 C3 OUT+ IN+ OUT+ R2 36K A2 C5 IN- C1 GND IN- B3 GND 10nF Speaker IS31AP2010B JP1 CLOSE=SE Figure 2: IS31AP2010B Application Circuit Lumissil Microsystems www.lumissil.com 2 Rev. A, 01/15/2015