IS31AP4996 1.1W AUDIO POWER AMPLIFIER WITH ACTIVE-HIGH STANDBY MODE DESCRIPTION RECOMMENDED EQUIPMENT The IS31AP4996 has been designed for demanding audio applications such as mobile phones and permits the reduction of a number of external components. The IC is capable of delivering 1.1W of continuous RMS output power into an 8Ω load @ 5V. An externally-controlled standby mode reduces the device supply current to much less than 2μA. It also includes an integrated thermal shutdown protection circuit. The unity-gain stable amplifier can be configured by external gain setting resistors. 5.0V, 2A power supply Audio source (i.e. MP3 player, Notebook PC, etc.) 8Ω speakers ABSOLUTE MAXIMUM RATINGS ≤ 5.5V power supply Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. PROCEDURE FEATURES Operating from VCC = 2.7V ~ 5.5V 1.1W output power @ VCC = 5V, THD+N= 1%, f = 1kHz, with 8Ω load Ultra-low consumption in standby mode (much less than 2μA) 56dB PSRR @217Hz in grounded mode Near-zero click-and-pop Ultra-low distortion (0.074%@0.5W, 1kHz) SOP-8 and MSOP-8 package The IS31AP4996 evaluation board is fully assembled and tested. Follow the steps listed below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) 2) 3) QUICK START 4) 5) Connect an 8Ω (or larger) speaker across the OUT- terminal and OUT+ terminal. Or connect speaker to the connector (AUDIO OUT). Connect the ground terminal of the 5V DC power supply to the GND and the positive terminal to the VCC. Or connect DC power to the connector (DC INPUT). Connect the audio source to the IN- terminal; or connect audio source to the connector (AUDIO INPUT). Turn on the power supply. Turn on the audio source. Figure 1: Photo of IS31AP4996 Evaluation Board ORDERING INFORMATION Part No. Temperature Range Package IS31AP4996-GRLS2-EB IS31AP4996-SLS2-EB -40°C ~ +85°C (Industrial) SOP-8, Lead-free MSOP-8, Lead-free Table1: Ordering Information For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing team at [email protected] or (408) 969-6600. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 06/03/2013 1 IS31AP4996 1.1W AUDIO POWER AMPLIFIER WITH ACTIVE-HIGH STANDBY MODE EVALUATION BOARD OPERATION HIGH-PASS FILTER The IS31AP4996 demo board features the IS31AP4996 Class-AB power amplifier IC, designed to drive a speaker impedance of 8Ω or larger. The input capacitor CI (C3) and input resistor RI (R1) form a high-pass filter with the corner frequency, fc, determined by Equation (2). Refer to the IS31AP4996 datasheet for more details. 1 CUSTOMIZING THE GAIN f c 2R C I I The IS31AP4996 demo board is shipped with a gain of 6dB; set by resistors RI (R1) and RF (R2). Change resistors RI and RF to reconfigure the gain of the board. The gain is determined by Equation (1): Gain 2 R F V V RI (2) SHUTDOWN MODE Jumper (JP1) controls the shutdown pin of the IS31AP4996 IC. Connect jumper (JP1) to place the board in shutdown mode. (1) C4 NC R2 TP1 CON1 DC IN VCC 20K C1 10uF VCC 0.1uF 20K IN- TP4 INN 4 IN- 3 0.47uF SD IN- 1 Close=SD TP6 CON3 BYPASS AUDIO OUT SD 7 CON2 AUDIO IN 2 OUT- 5 IN+ C5 Bypass OUT- GND TP3 U1 R1 VCC TP2 C3 6 C2 1uF OUT+ 8 OUT+ TP5 IS31AP4996-GRLS2 R3 VCC 100K JP1 VCC C6 4 3 2 SD 1 OUT- 5 OUT- IN+ BYPASS SD 7 Bypass IN- GND INN VCC U2 6 1uF OUT+ 8 OUT+ IS31AP4996-SLS2 Figure 2: IS31AP4996 Application Schematic Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 06/03/2013 2 IS31AP4996 1.1W AUDIO POWER AMPLIFIER WITH ACTIVE-HIGH STANDBY MODE Bill of Materials Name Symbol Amplifier U1 Resistors Qty Supplier Part No. 1.1W Class- AB Power Amplifier 1 ISSI IS31AP4996 R1,R2 RES,20k,1/16W,±5%,SMD 2 Resistor R3 RES,100k,1/16W,±5%,SMD 1 Capacitor C1 CAP,10µF,16V,±20%,SMD 1 Capacitor C2 CAP, 1µF,16V,±20%,SMD 1 Capacitor C3 CAP,0.1µF,50V,±20%,SMD 1 Capacitor C5 CAP,0.47µF,16V,±20%,SMD 1 Not Connect 3 C6,C4,U2 Description Bill of materials, refer to Figure 2 above. Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 06/03/2013 3 IS31AP4996 1.1W AUDIO POWER AMPLIFIER WITH ACTIVE-HIGH STANDBY MODE 0 0 2 2 2 1 1 2 1 2 2 1 2 1 2 1 2 1 2 1 2 0 0 Figure 3: Board Component Placement Guide -Top Layer Figure 4: Board PCB Layout- Top Layer Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 06/03/2013 4 IS31AP4996 1.1W AUDIO POWER AMPLIFIER WITH ACTIVE-HIGH STANDBY MODE 0 0 2 2 2 1 1 2 1 2 2 1 2 1 2 1 2 1 2 1 2 0 0 Figure 5: Board Component Placement Guide -Bottom Layer Figure 6: Board PCB Layout-Bottom Layer Copyright © 2013 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that: a.) the risk of injury or damage has been minimized; b.) the user assume all such risks; and c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 06/03/2013 5