IS31AP4991 CLASS-AB AUDIO AMPLIFIER

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1 IS3AP499 CLASS-AB AUDIO AMPLIFIER DESCRIPTION The IS3AP499 demo board is a fully assembled and tested PCB that uses the IS3AP499 Class-AB power amplifier to drive an 8Ω or larger speaker in portable audio applications. The demo board accepts a single-ended input signal. The demo board provides a BTL output capable of delivering.w into an 8Ω speaker at 5V. FEATURES Supply voltage range from.7v to 5.5V Delivers.W into an 8Ω speaker at 5V supply. (THD+N=%). Ultra-low distortion (.5%@.5W, khz) Available in MSOP-8 and SOP-8 package QUICK START RECOMMENDED EQUIPMENT 5.V, A power supply Audio source (i.e. MP3 player, Notebook PC, etc.) 8Ω speaker ABSOLUTE MAXIMUM RATINGS 5.5V power supply Caution: Do not exceed the conditions listed above; otherwise the board will be damaged. PROCEDURE The IS3AP499 demo 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. ) 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 power supply to the GND and the positive terminal to the. Or connect DC power to connector (DC INPUT). 3) Connect the audio source to the IN- terminal; or connect audio source to the connector (AUDIO INPUT). 4) Turn on the power supply. 5) Turn on the audio source. Figure : Photo of IS3AP499 Evaluation Board Note: Only one IC type will be installed on PCB. ORDERING INFORMATION Part No. Temperature Range Package IS3AP499-GRLS-EB IS3AP499-SLS-EB -4 C ~ +85 C (Industrial) Table : Ordering Information SOP-8, Lead-free MSOP-8, Lead-free For pricing, delivery, and ordering information, please contacts ISSI s analog marketing team at analog@issi.com or (48) Integrated Silicon Solution, Inc. Rev. A, /7/5

2 IS3AP499 CLASS-AB AUDIO AMPLIFIER DETAILED DESCRIPTION The IS3AP499 demo board features the IS3AP499 Class-AB power amplifier IC, designed to drive speaker impedance of 8Ω or larger. CUSTOMIZING THE GAIN The IS3AP499 demo board is shipped with a gain of 8.3dB and is set by resistors R I (R ) and R F (R ). Change resistors R I and R F to reconfigure the gain of the board and gain determined in Equation () RF V G ain () R I V HIGH-PASS FILTER The input capacitor C I (C 4 ) and input resistor R I (R ) form a high-pass filter with the corner frequency, f C, determined in Equation () and refer to IS3AP499 data sheet for more detail. f c SHUTDOWN MODE R C () I I Jumper (JP) controls the shutdown pin of the IS3AP499 IC. Connect the shunt across pin and of the jumper (JP) to enter the shutdown mode of the board. DC INPUT C uf C uf C5 NC R 8k C3.uF U 6 Audio IN C4 5nF R k C6 uf 4 3 Vin- Standby Vin+ Bypass GND 7 Vout 5 Vout 8 IS3AP499_MSOP8 SPEAKER R3 k C7 U 8.uF 3 Vin- Vout JP CLOSE=SD 7 5 Standby Vin+ Bypass GND Vout 6 4 IS3AP499_SOP8 Figure : IS3AP499 Application Circuit Integrated Silicon Solution, Inc. Rev. A, /7/5

3 IS3AP499 CLASS-AB AUDIO AMPLIFIER BILL OF MATERIALS Name Symbol Description Qty Supplier Part No. Amplifier U Class- AB power amplifier ISSI IS3AP499 Resistor R RES,k,/6W,±%,SMD Yageo RC63FR-7KL Resistor R RES,8k,/6W,±%,SMD Yageo RC63FR-78KL Resistor R3 RES,k,/6W,±5%,SMD Yageo RC63JR-7KL Capacitor C CAP,µF,V,±%,SMD Yageo CC85KKX7R6BB6 Capacitor C,C6 CAP, µf,5v,±%,smd Yageo CC63KKX7R9BB5 Capacitor C3,C7 CAP,.µF,5V,±%,SMD Yageo CC63KKX7R9BB4 Capacitor C4 CAP,5nF,5V,±%,SMD Yageo CC63KKX7R9BB53 Connector DC INPUT.5mm DC connector Connector AUDIO OUT RCA type connector Connector AUDIO INPUT 3.5mm min connector U,C5 No installed Bill of materials, refers to Figure above. Integrated Silicon Solution, Inc. 3 Rev. A, /7/5

4 IS3AP499 CLASS-AB AUDIO AMPLIFIER Figure : Board Component Placement Guide - Top Layer Figure 3: Board PCB Layout - Top Layer Integrated Silicon Solution, Inc. 4 Rev. A, /7/5

5 IS3AP499 CLASS-AB AUDIO AMPLIFIER Figure 4: Board Component Placement Guide - Bottom Layer Figure 5: Board PCB Layout - Bottom Layer Copyright 5 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. 5 Rev. A, /7/5