For pricing, delivery, and ordering information, please contact ISSI at or call

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1 IS3AP488D Class-AB Audio Amplifier Evaluation Board Guide Description The IS3AP488D demo board is a fully assembled and tested PCB that uses the IS3AP488D Class-AB a dual bridge-connected audio power amplifier. Designed to drive speaker impedance of 4Ω or larger. The demo board provides dual BTL output, capable of delivering.6w into a 4Ω speaker at 5V. Features Supply voltage range from.7v to 5.5V Delivers.6W into a 4Ω speaker at 5V supply. (THD+N=%). Delivers.6W into an 8Ω speaker at 5V supply. (THD+N=%) Available in QFN-6(4mm 4mm) package QUICK START Recommended Equipment 5.V, A power supply Audio source (i.e. MP3 player, Notebook PC) 8Ω or 4Ω speaker Absolute Maximum Ratings 5.5V power supply Caution: Do not exceed the conditions listed above. Doing so may risk causing damage to the board. Procedure Please use the evaluation board by following the procedures listed below to verify operation of IS3AP488D. Caution: Do not turn on the power supply until all connections are completed. Connect 4Ω (or larger) speakers across the (OUTA+, OUTA-) terminal and (OUTB+, OUTB-) terminal. Or connect speakers to the connector (OUTA, OUTB). Connect the ground terminal of the power supply to the and the positive terminal to the VCC. Or connect DC power to connector (DC CON). Connect the audio sources to the INA terminal (left channel) and INB terminal (right channel); or connect audio sources to the connector (AUDIO IN). Turn on the power supply. Turn on the audio sources. Figure Photo of IS3AP488D Evaluation Board Ordering Information Part No. Temperature Range Package IS3AP488D-QFLS-EB -4 C to +85 C (Industrial) QFN-6 (4mm x 4mm), Lead-free Table. Ordering Information For pricing, delivery, and ordering information, please contact ISSI at analog_mkt@issi.com or call Integrated Silicon Solution, Inc. R., 3/8/

2 IS3AP488D Class-AB Audio Amplifier Evaluation Board Guide Evaluation Board Operation The IS3AP488D demo board features the IS3AP488D Class-AB power amplifier IC, designed to drive speaker impedance of 4Ω or larger. Gain Selection The IS3AP488D demo board ships with a preset gain of 8.3dB. The gain of the board is determined by the values of resistors R I (R, R ) and R F (R 3, R 4 ). Change resistors R I and R F to obtain desirable gain value. Equation () allows calculation of specific resistances needed for the desired gain setting. Refer to IS3AP488D data sheet for more details. R V G ain F () R I V High-Pass Filter The input capacitors C I (C 5, C 6 ) and input resistors R I (R, R ) form a high-pass filter with the corner frequency,, determined in Equation (). f c Shutdown Mode () R I C I Jumper (J) controls the shutdown pin of the IS3AP488D IC. Connect the shunt across pin and of the jumper (J) to enter the shutdown mode of the board. uf.uf R3 8K VCC C C C3.F VCC R5 K J CLOSE=SD INA C5 5nF R K C4 uf 4 9 INA BYPASS VDD VDD -OUTA +OUTA +OUTB 3 SPEAKER INB C6 5nF R K 8 INB -OUTB SPEAKER U SD IS3AP488D R4 8K Figure IS3AP488D Application Circuit Integrated Silicon Solution, Inc. R., 3/8/

3 IS3AP488D Class-AB Audio Amplifier Evaluation Board Guide Bill Of Materials No. Name Description Symbol Quantity Manufacturer Part IC Class-AB Mono U IS3AP488D Resistor kω R, R 3 Resistor 8kΩ R3, R4 4 Resistor kω R5 5 Capacitor μf C 6 Capacitor.μF C, C3 7 Capacitor μf C4 8 Capacitor 5nF C5, C6 Table : Please refer to the application circuit about other components in Figure Integrated Silicon Solution, Inc. 3 R., 3/8/

4 IS3AP488D Class-AB Audio Amplifier Evaluation Board Guide 3 Figure 3: Board Component Placement Guide -Top Layer Figure 4: Board PCB Layout- Top Layer Integrated Silicon Solution, Inc. 4 R., 3/8/

5 IS3AP488D Class-AB Audio Amplifier Evaluation Board Guide 3 Figure 5: Board Component Placement Guide -Bottom Layer Figure 6: Board PCB Layout-Bottom Layer Integrated Silicon Solution, Inc. 5 R., 3/8/

6 IS3AP488D Class-AB Audio Amplifier Evaluation Board Guide Copyright 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. 6 R., 3/8/