PAM8124 EVB User Guide PAM8124-EV Board User Guide AE Department 1. Revision Information Date Revision Description 2013/8/16 V1.0 Initial release Comment This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM8124 Document number: DSxxxxx Rev. 1 - 0 1 of 8 www.diodes.com August 2013 © Diodes Incorporated PAM8124 EVB User Guide 2. PAM8124 General Description The PAM8124 is a 15W efficient, Class-D audio power amplifier for driving stereo speakers in a single-ended configuration; or a mono speaker in a bridge-tied-load configuration. The PAM8124 can drive stereo speakers (SE) as low as 4Ω. Due to the low power dissipation and high efficiency the device can be used without any external heat sink when playing music. The gain of the amplifier is controlled by 2 gain selectable pins, offering 20dB, 26dB, 32dB, and 36dB gain selections. The PAM8124 is available in a TSSOP-24 package. 3. Key Features ◆ 30W/Ch into 8Ω BTL Load from 22V Supply ◆ 15W/Ch into 4Ω SE Load from 22V Supply ◆ 10W/Ch into 8Ω SE Load from 24V Supply ◆ Operate from 10V to 26V ◆ Single-Ended Analog Inputs ◆ Supports Multiple Output Configurations: - 2-Ch Single-Ended (SE, Half-Bridge) - 1-Ch Bridge-Tied Load (BTL, Full-Bridge) ◆ Four Selectable Fixed-gain Settings ◆ No Pop Noise for Start-up and Shut-down Sequences ◆ Internal Oscillator (No External Components Required) ◆ High Efficient Class-D Operation Eliminates Need for Heat Sinks ◆ Thermal and Short-Circuit Protection with Auto Recovery This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM8124 Document number: DSxxxxx Rev. 1 - 0 2 of 8 www.diodes.com August 2013 © Diodes Incorporated PAM8124 EVB User Guide 4. EV Board Schematic C6 Vin C7 IC1 1 2 SD 3 4 Mute Lin C1 Rin C2 R1 5 R2 6 C3 7 8 9 10 C4 11 12 Vin R3 C5 PVCCL PGNDL SD PGNDL PVCCL LOUT MUTE BSL LIN AVCC RIN SE_BTL VCM GAIN0 AGND GAIN1 AGND BSR PVCCR ROUT VCLAMP PGNDR PVCCR PGNDR AVCC L_BTL R4 C8 D1 24 23 R4 C12 C15 21 20 19 C19 AVCC C16 L_GND R_GND Gain0 17 Gain1 C20 C21 C13 16 L2 15 14 R7 D2 13 R_SE R7 R_BTL R_BTL C11 Vin Mute Gain0 Gain1 SE_BTL 1 AVCC 1 AVCC 1 AVCC 1 AVCC 1 AVCC 2 SD 2 Mute 2 Gain0 2 Gain1 2 SE_BTL 3 L_SE SE_BTL 18 C10 SD C18 L1 22 C9 AVCC L_BTL 3 3 3 3 Figure 1 5. PAM8124 TB24AA EVB Description PAM8124 TB24AA is an evaluation board for the PAM8124, a stereo class-D audio power amplifier. The board is targeted to be used in providing a simple and convenient evaluation environment for the PAM8124. Requires parts, the audio inputs, pin jacks for power supply and signal outputs etc. on the board make it easy to be evaluated. This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM8124 Document number: DSxxxxx Rev. 1 - 0 3 of 8 www.diodes.com August 2013 © Diodes Incorporated PAM8124 EVB User Guide 6. EV Board View and Jack Description Top Layer Power Supply Ground L-CH negative Output L-CH positive Output (Single-Ended) (Single-Ended) L-CH Audio Input BTL-Output negative BTL-Output positive R-CH Audio Input Output mode SD Control MUTE Control G1 seting G0 seting select R-CH negative Output R-CH Positive Output (Single-Ended) This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM8124 Document number: DSxxxxx Rev. 1 - 0 4 of 8 www.diodes.com August 2013 © Diodes Incorporated PAM8124 EVB User Guide Bottom Layer Copper Exposed for Thermal Transfer EV board operational sequence: a. Connect SD to a high and MUTE to a low for normal operation b. Connect audio input from audio input jack c. Connect the loading(speaker or power resistor) to the output jack d. Power on: DC power supply This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM8124 Document number: DSxxxxx Rev. 1 - 0 5 of 8 www.diodes.com August 2013 © Diodes Incorporated PAM8124 EVB User Guide 7. EV Board BOM List Item Value Type Rating Description Vender and port C1,C2 1uF X5R/X7R, Ceramic/0603 25V Input coupling CAP TMK107B7105KA-T C3 1uF X5R/X7R, Ceramic/0603 25V VCM coupling CAP TMK107B7105KA-T C12,C13 1uF X5R/X7R, Ceramic/0603 25V High side driver bootstrap TMK107B7105KA-T C8, C9 0.1uF X5R/X7R, Ceramic/0603 35V PVDD coupling CAP, GMK105BJ104KV-F C7,C10 10uF X5R/X7R, Ceramic/1210 35V PVDD main coupling CAP, GMK325BJ106MN-T C15 0.1uF X5R/X7R, Ceramic/0603 35V AVCC coupling CAP GMK105BJ104KV-F C16 10uF X5R/X7R, Ceramic/1210 35V AVCC main coupling CAP GMK325BJ106MN-T C4 1uF X5R/X7R, Ceramic/0603 25V Vclamp coupling CAP TMK107B7105KA-T R1,R2, 0 0603 C6,C11, 470uF Electrolytic 35V C18,C21, 470uF Electrolytic 35V L1,L2 33uH 1.83A 0Ω 0603 4.7K 0603 R3 R4,R7, IC1 CAP Input Resistor 5% Power supply decoupling CAP Output CAP Output inductance TOKO A7503CY-330M Separate AVCC from PVDD Discharge resistance PAM8124 PAM 8. PCB Layout Example This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM8124 Document number: DSxxxxx Rev. 1 - 0 6 of 8 www.diodes.com August 2013 © Diodes Incorporated PAM8124 EVB User Guide Top layer This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM8124 Document number: DSxxxxx Rev. 1 - 0 7 of 8 www.diodes.com August 2013 © Diodes Incorporated PAM8124 EVB User Guide Bottom layer This application note contains new product information. Diodes, Inc. reserves the right to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. PAM8124 Document number: DSxxxxx Rev. 1 - 0 8 of 8 www.diodes.com August 2013 © Diodes Incorporated