A Product Line of Diodes Incorporated PAM8124 HIGH POWER AUDIO Description Pin Assignments TSSOP-24-EP driving stereo speakers in a single-ended configuration; or a mono PVCCL 1 SDN 2 PVCCL 3 MUTE 4 LIN 5 RIN 6 VCM 7 AGND 8 AGND 9 PVCCR 10 VCLAMP 11 PVCCR 12 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, up to 95%, 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-EP package. 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: PAM8124 X XX YWW LL 24 23 22 21 20 19 18 17 16 15 14 13 PGNDL PGNDL LOUT BSL AVCC SE_BTL GAIN0 GAIN1 BSR ROUT PGNDR PGNDR Applications 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 • Space-Saving Surface-Mount TSSOP-24EP Package • Pb-Free Package Televisions • Home Sound Systems • Active Speakers Typical Applications Circuit U1 10V_to_26V 1 2 SD 3 4 Mute 5 L_in 6 R_in 7 C1 1uF 8 9 C3 1uF 10V_to_26V PAM8124 Document number: DS36627 Rev. 1 - 2 10 11 12 PVCCL PGNDL SDN PGNDL PVCCL LOUT MUTE LIN RIN VCM BSL PAM8124 NEW PRODUCT The PAM8124 is a 15W efficient, Class-D audio power amplifier for AVCC SE_BTL GAIN0 AGND GAIN1 AGND BSR PVCCR ROUT VCLAMP PGNDR PVCCR PGNDR 24 C5 220nF 23 R1 4.7K L1 22 L_out1 C7 470uF 8ohm 33uH 21 C2 20 1uF 10V_to_26V 19 SE_BTL 18 G0 17 16 15 14 G1 C4 1uF L2 33uH 13 1 of 15 www.diodes.com C6 220nF R2 4.7K C8 470uF 8ohm R_out1 October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 NEW PRODUCT Pin Descriptions Pin 1, 3 Name PVCCL I/O/P P 2 SDN I 4 MUTE I 5 6 LIN RIN I I 7 8, 9 10, 12 VCM AGND PVCCR O P P 11 VCLAMP P 13, 14 PGNDR P 15 16 17 18 ROUT BSR GAIN1 GAIN0 O I/O I I 19 SE_BTL I 20 21 22 23, 24 AVCC BSL LOUT PGNDL P I/O O P Function Power supply for left channel H-bridge, not connected to PVCCR or AVCC Shutdown signal for IC (low = shutdown, high = operational). TTL logic levels with compliance to AVCC A logic high on this pin disables the outputs. A low on this pin enables the outputs. TTL logic levels with compliance to AVCC Audio input for left channel Audio input for right channel Reference for analog cells Analog ground for digital/analog cells in core Power supply for right channel H-bridge, not connected to PVCCL or AVCC Internally generated voltage supply for bootstrap. Not to be used as a supply or connected to any component other than the decoupling capacitor. Power ground for right channel H-bridge Class-D H-bridge output for right channel Bootstrap I /O for right channel H-bridge Gain select most-significant bit. TTL logic levels with compliance to AVCC Gain select least-significant bit. TTL logic levels with compliance to AVCC A logic low on this pin enables one single-ended input in BTL configuration. A logic high on this pin enables two inputs in SE/BTL configuration. TTL logic levels with compliance to AVCC High-voltage analog power supply Bootstrap I /O for left channel H-bridge Class-D H-bridge output for left channel Power ground for left channel H-bridge Functional Block Diagram PAM8124 Document number: DS36627 Rev. 1 - 2 2 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) Parameter Rating 28 Unit V -0.3 to VCC +0.3 V -0.3 to +5.5 -65 to +150 150 40 V °C °C °C/W NEW PRODUCT Supply Voltage (VCC) Logic Input Voltage (SDN, MUTE, GAIN0, GAIN1, SE_BTL) Analog Input Voltage (LIN, RIN) Storage Temperature Maximum Junction Temperature Junction to ambient thermal resistance Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Symbol Parameter Min Max Unit VCC Supply Voltage 10 26 V TA Operating Ambient Temperature Range -40 +85 °C TJ Junction Temperature Range -40 +125 °C Electrical Characteristics (@TA = +25°C, VCC = 24V, Gain = 20dB, RL = 8Ω unless otherwise specified.) Symbol |VOS| ICC(q) Parameter Class-D output offset voltage(measured differently) Quiescent supply current Test Conditions Min Typ Max Units Vi = 0V, AV = 36dB 20 100 mV SDN = 2.5V, MUTE = 0V, No Load 25 40 mA mA ICC(MUTE) Quiescent supply current in mute mode MUTE = 2.5V, No load 25 40 ICC(SDN) Quiescent current in shutdown mode SDN = 0.8V, No load 30 60 RDS(ON) Drain-source on-state resistance IO = 0.5A 150 G Gain Mute Attenuation PSRR Power Supply Rejection Ratio Output Power at 1% THD+N PO Output Power at 10% THD+N THD+N Total harmonic distortion + noise Vn Output integrated noise floor Cs GAIN1 = 0.8V, GAIN0 = 0.8V 18 20 22 GAIN1 = 0.8V, GAIN0 = 2.5V GAIN1 = 2.5V, GAIN0 = 0.8V GAIN1 = 2.5V, GAIN0 = 2.5V Vi = 1Vrms 24 30 34 26 32 36 -60 28 34 38 VRIPPLE = 200mVpp, f = 1kHz,gain = 20dB -52 RL = 4Ω, f = 1kHz 14 RL = 8Ω, f = 1kHz 8 RL = 4Ω, f = 1kHz 18 µA mΩ dB dB dB W 10 RL = 8Ω, f = 1kHz RL =4Ω, f = 1kHz, Po = 10W 0.15 RL = 8Ω, f = 1kHz, Po = 5W 0.08 20Hz to 22kHz, A-weighted, Gain = 20dB 200 % µV Crosstalk PO = 1W, f = 1kHz, Gain = 20dB -70 dB SNR OTP OTH Signal-to-noise ratio Thermal trip point Thermal hysteresis THD+N<1%, f = 1kHz, Gain = 20dB dB °C °C fosc Oscillator frequency 92 160 60 300 360 PAM8124 Document number: DS36627 Rev. 1 - 2 SE_BTL = 2.5V SE_BTL = 0.8V 3 of 15 www.diodes.com 250 350 kHz October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Performance Characteristics (@TA = +25°C, VCC = 24V, f = 1kHz, Gain = 20dB unless otherwise specified.) NEW PRODUCT THD+N vs. Output Power (RL = 4Ω, SE) THD+N vs. Output Power (RL = 8Ω, SE) 20 20 10 10 5 5 2 2 1 % 1 % 0.5 0.5 0.2 0.2 0.1 0.1 0.05 0.06 1m 2m 5m 10m 20m 50m 100m 200m 500m 1 2 5 10 0.03 1m 20 30 2m 5m 10m 20m 50m 200m 500m 1 2 5 10 20 THD+N vs. Frequency (RL = 8Ω, SE) THD+N vs. Frequency (RL = 4Ω, SE) 20 10 100m W W 20 PO = 2W/ 5W/ 8W (Red / Blue/ Pink) 10 5 5 PO = 1W/ 2W/ 6W (Red / Blue/ Pink) 2 2 1 1 % % 0.5 0.5 0.2 0.2 0.1 0.1 0.05 0.05 0.03 20 50 100 200 500 1k 2k 5k 10k 0.02 20 20k 50 100 200 500 Hz 1k 2k 5k 10k 20k Hz THD+N vs. Output Power (RL = 8Ω, BTL) THD+N vs. Frequency (RL = 8Ω, BTL) 20 20 10 10 5 5 PO = 5W/ 10W/ 15W (Red / Blue/ Pink) 2 2 1 1 % % 0.5 0.5 0.2 0.1 0.2 0.05 0.1 0.02 0.05 0.03 1m 2m 5m 10m 20m 50m 100m 200m 500m 1 2 5 10 20 50 0.01 20 W PAM8124 Document number: DS36627 Rev. 1 - 2 50 100 200 500 1k 2k 5k 10k 20k Hz 4 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Performance Characteristics (@TA = +25°C, VCC = 24V, f = 1kHz, Gain = 20dB unless otherwise specified.) Crosstalk vs. Frequency (RL = 8Ω, SE) Crosstalk vs. Frequency (RL = 4Ω, SE) +0 +0 NEW PRODUCT -5 -10 -15 -20 -25 -5 -10 PO = 1W L to R/ R to L (Red /Blue) -15 -20 T -25 -30 -30 -35 -35 -40 -40 -45 d B T PO = 1W L to R/ R to L (Red / Blue) -45 d B -50 -50 -55 -55 -60 -60 -65 -65 -70 -70 -75 -75 -80 -80 -85 -85 -90 -90 -95 -95 -100 20 50 100 200 500 1k 2k 5k 10k -100 20 20k 50 100 200 500 Hz +0 T T T -5 -5 -10 -10 -15 -15 -20 -20 -25 -25 -30 -45 -50 -50 -55 -55 -60 -60 -65 -65 -70 -70 -75 5k 10k 20k 5k 10k T T -75 50 100 200 500 1k 2k 5k 10k -80 20 20k 50 100 200 Hz 500 1k 2k Hz PSRR vs. Frequency (RL = 8Ω, BTL) T T T 20k -40 -45 +0 10k -35 d B -40 -80 20 5k -30 -35 d B 2k PSRR vs. Frequency (RL = 8Ω, SE) PSRR vs. Frequency (RL = 4Ω, SE) +0 1k Hz Noise Floor (RL = 8Ω, SE) +0 T T T -5 -10 -10 -20 -15 -30 -20 -40 -25 -30 -50 d B r -35 d B -40 -60 -70 -45 A -80 -50 -55 -90 -60 -100 -65 -110 -70 -120 -75 -80 20 50 100 200 500 1k 2k 5k 10k 20k -130 20 PAM8124 Document number: DS36627 Rev. 1 - 2 50 100 200 500 1k 2k 20k Hz Hz 5 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Performance Characteristics (@TA = +25°C, VCC = 24V, f = 1kHz, Gain = 20dB unless otherwise specified.) Frequency Response (RL = 8Ω, SE) Frequency Response (RL = 8Ω, BTL) +24 NEW PRODUCT +24 +23 +22 +21 +23 LFILT = 33µH CFILT = 0.22µF CDC = 470µF +22 +21 +20 +20 +19 +19 d B g A +17 d B g +16 A +18 +18 +17 +16 +15 +15 +14 +14 +13 +13 +12 +12 +11 +11 +10 20 50 100 200 500 1k 2k 5k 10k 20k +10 20 50 100 200 500 1k 2k Efficiency vs. Output Power (RL = 4Ω) Efficiency vs. Output Power (RL = 8Ω) Quiescent Current vs. Supply Voltage OSC Frequency vs. Supply Voltage PAM8124 Document number: DS36627 Rev. 1 - 2 5k 10k 20k Hz Hz 6 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Performance Characteristics (@TA = +25°C, VCC = 24V, f = 1kHz, Gain = 20dB unless otherwise specified.) NEW PRODUCT Case Temperature vs. Output Power (RL = 4Ω) Case Temperature vs. Output Power (RL = 8Ω) Two Channels Driving Two Channels Driving Application Information Input Capacitors (Ci) In the typical application, an input capacitor Ci, is required to allow the amplifier to bias the input signal to the proper DC level for optimum operation. In this case, Ci and the minimum input impedance Ri form is a high-pass filter with the corner frequency determined in the follow equation: fC = 1 ( 2π RiCi) It is important to consider the value of Ci as it directly affects the low frequency performance of the circuit. For example, when Ri is 40kΩ and the specification calls for a flat bass response are down to 20Hz. Equation is reconfigured as followed: Ci = 1 ( 2π Rifc ) When input resistance variation is considered Ci is 200nF, so one would likely choose a value of 220nF. A further consideration for this capacitor is the leakage path from the input source through the input network (Ci, Ri + Rf) to the load. This leakage current creates a DC offset voltage at the input to the amplifier that reduces useful headroom, especially in high gain applications. For this reason, a low-leakage tantalum or ceramic capacitor is the best choice. Gain Setting Control The gain of the PAM8124 is set by two input terminals, GAIN0 and GAIN1. The gains listed in following table are realized by changing the taps on the input resistors inside the amplifier. This causes the input impedance to be dependent on the gain setting. The actual gain settings are controlled by ratios of resistors, so the gain variation from part-to-part is small. However, the input impedance from part-to-part at the same gain may shift by ±20% due to shifts in the actual resistance of the input resistors. Table 1: Gain Setting Gain1 Gain0 Amplifier Gain (dB), Typical Input Impedance (kΩ), Typical (Ri) 0 0 1 1 0 1 0 1 20 26 30 36 40 20 10 6.67 PAM8124 Document number: DS36627 Rev. 1 - 2 7 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Application Information (cont.) Input Resistance NEW PRODUCT Changing the gain setting can vary the input resistance of the amplifier from its smallest value (6.67kΩ ±20%) to the largest value (40kΩ ±20%). As a result, if a single capacitor is used in the input high-pass filter, the –3dB cutoff frequency may change when changing gain steps. The –3dB frequency can be calculated using the following Equation. Use the Ri values given in Table 1. fC = 1 ( 2π RiCi) Single-Ended Output Capacitor In single-ended (SE) applications, the dc blocking capacitor forms a high-pass filter with the speaker impedance. The frequency response rolls off with decreasing frequency at a rate of 20dB/decade. The cutoff frequency is determined by: f coh = 1 2πR L CSE Table 2 shows some common component values and the associated cutoff frequencies: Table 2: Common Filter Responses RL-Speaker Impedance (Ω) 4 6 8 CSE-DC Blocking Capacitor (µF) fc = 60Hz (-3dB) fc = 40Hz (-3dB) fc = 20Hz (-3dB) 680 1000 2200 470 680 1500 330 470 1000 Output Filter and Frequency Response For the best frequency response, a flat pass band output filter (second-order Butterworth) may be used. The output filter components consist of the series inductor and capacitor to ground at the LOUT and ROUT pins. There are several possible configurations, depending on the speaker impedance and whether the output configuration is single-ended (SE) or bridge-tied load (BTL). Table 3 lists the recommended values for the filter components. It is important to use a high-quality capacitor in this application. A rating of at least X7R is required. Table 3: Recommended Filter Output Components Output Configuration Speaker Impedance(Ω) 4 Single Ended (SE) 8 Bridge Tied Load (BTL) 8 PAM8124 Document number: DS36627 Rev. 1 - 2 Filter Inductor(µH) 22 33 22 8 of 15 www.diodes.com Filter Capacitor(nF) 680 220 680 October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 NEW PRODUCT Application Information (cont.) BTL Filter Configuration SE Filter Configuration Power and Heat Dissipation Choose speakers that are able to stand large output power from the PAM8124. Otherwise, speaker may suffer damage. Heat dissipation is very important when the device works in full power operation. Two factors affect the heat dissipation, the efficiency of the device that determines the dissipation power, and the thermal resistance of the package that determines the heat dissipation capability. Generally, class-D amplifiers are high efficiency and need no heat sink. Operating at higher powers a heat sink still may not be necessary if the PCB is carefully designed to achieve good thermal dissipation. How to Reduce EMI Most applications require a ferrite bead filter for EMI elimination shown at Figure 1. The ferrite filter reduces EMI around 1MHz and higher. When selecting a ferrite bead, choose one with high impedance at high frequencies, but low impedance at low frequencies. Ferrite Bead OUT+ 200pF Ferrite Bead OUT- 200pF Figure 1. Ferrite Bead Filter to Reduce EMI Dual-Side PCB To achieve good heat dissipation, the PCB's copper plate should be thicker than 35um and the copper plate on both sides of the PCB should be utilized for heat sink. The thermal pad on the bottom of the device should be soldered to the plate of the PCB, and via holes, usually 9 to 16, should be drilled in the PCB area under the device and deposited copper on the vias should be thick enough so that the heat can be dissipated to the other side of the plate. There should be no insulation mask on the other side of the copper plate. It is better to drill more vias on the PCB around the device if possible. PAM8124 Document number: DS36627 Rev. 1 - 2 9 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Application Information (cont.) MUTE Operation NEW PRODUCT The MUTE pin is an input for controlling the output state of the PAM8124. A logic high on this pin causes the outputs to run at a constant 50% duty cycle. A logic low on this pin enables the outputs. This pin may be used as a quick disable or enable of the outputs. Shutdown Operation The PAM8124 employs a shutdown operation mode to reduce supply current to the absolute minimum level during periods of non-use to save power. The SDN input terminal should be pulling high during normal operation when the amplifier is in use. Pulling SDN low causes the outputs to mute and the amplifier to enter a low-current state. SDN should never be left unconnected to prevent the amplifier from unpredictable operation. For the best power-off pop performance, the amplifier should be set in shutdown mode prior to removing the power supply voltage. For the best start-up pop performance, the amplifier should be set in mute mode prior to restarting the amplifier. Internal Bias Generator Capacitor Selection The internal bias generator (VCM) provides the internal bias for the preamplifier stage. The external input capacitors and this internal reference allow the inputs to be biased within the optimal common-mode range of the input preamplifiers. The selection of the capacitor value on the VCM terminal is critical for achieving the best device performance. During startup or recovery from shutdown state the VCM capacitor determines the rate at which the amplifier starts up. The startup time is not critical for the best de-pop performance since any heard pop sound is the result of the class-D output switching-on other than that of the startup time. However, at least a 0.47µF capacitor is recommended for the VCM capacitor. Another function of the VCM capacitor is to bypass high frequency noise on the internal bias generator. Power Supply Decoupling, CS The PAM8124 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output total harmonic distortion (THD) as low as possible. Power supply decoupling also prevents oscillations caused by long lead between the amplifier and the speaker. The optimum decoupling is achieved by using two capacitors of different types that target different types of noise on the power supply leads. For higher frequency transients, spikes, or digital hash on the line, a good low equivalent-series-resistance (ESR) ceramic capacitor of 0.1µF is typically recommended, placed as close as possible to the device's PVCC lead. To filter lower-frequency noises a large aluminium electrolytic capacitor of 470µF or greater is recommended, placed near the audio power amplifier. The 10µF capacitor also serves as a local storage capacitor for supplying current during large signal transients on the amplifier outputs. BSL and BSR Capacitors The half H-bridge output stages use NMOS transistors therefore requiring bootstrap capacitors for the high side of each output to turn on correctly. A ceramic capacitor 220nF or more rated for over 25V must be connected from each output to its corresponding bootstrap input. Specifically, one 220nF capacitor must be connected from LOUT to BSL and another 220nF capacitor from ROUT to BSR. It is recommended to use 1μF BST capacitor to replace 220nF for lower than 100Hz applications. VCLAMP Capacitors To ensure that the maximum gate-to-source voltage for the NMOS output transistors is not exceeded, an internal regulator is used to clamp the gate voltage. A 1µF capacitor must be connected from VCLAMP to ground and must be rated for at least 25V. The voltages at the VCLAMP terminals vary with VCC and may not be used to power any other circuitry. Using Low-ESR Capacitors Low-ESR capacitors are recommended throughout this application section. A real (with respect to ideal) capacitor can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this resistor minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this resistance the more the real capacitor behaves as an ideal capacitor. Short-Circuit Protection The PAM8124 has short circuit protection circuitry on the outputs to prevent damage to the device when output-to-output shorts (BTL mode), output-to-GND shorts, or output-to-VCC shorts occur. Once a short-circuit is detected on the outputs, the output drive is immediately disabled. This is not a latched fault. If the short was removed, the normal operation is restored. PAM8124 Document number: DS36627 Rev. 1 - 2 10 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Application Information (cont.) Thermal Protection tolerance on this trip point from device to device. Once the die temperature exceeds the set thermal point, the device enters into the shutdown state and the outputs are disabled. This is not a latched fault, the thermal fault is cleared once the temperature of the die is reduced by 60°C. The device begins normal operation at this point without external system intervention. Over Voltage Protection and Under Voltage Lock-out (OVP and UVLO) An over voltage protection (OVP) circuit is integrated in PAM8124, when the supply voltage is over 28V the OVP is active and then the output stage is disabled. The PAM8124 will auto recovery when the supply voltage is lower than the OVP threshold. The PAM8124 incorporates circuitry designed to detect low supply voltage. When the supply voltage drops to 9V or below, the PAM8124 goes into a state of shutdown. When the supply voltage is higher than UVLO threshold normal operation is resumed. Typical Applications Circuits C7 0.1uF C10 10uF C13 470uF VCC U1 1 2 SD 3 4 Mute L_in R_in C1 1uF C2 1uF R1 5 R2 6 7 C4 1uF 8 9 10 C3 1uF 11 12 PVCCL PGNDL SDN PGNDL PVCCL LOUT MUTE LIN RIN VCM BSL PAM8124 NEW PRODUCT Thermal protection on the PAM8124 prevents damage to the device when the internal die temperature exceeds 160°C. There is a ±15 degree AVCC SE_BTL GAIN0 AGND GAIN1 AGND BSR PVCCR ROUT VCLAMP PGNDR PVCCR PGNDR 24 C15 220nF 23 R3 4.7K L1 22 L_out C17 470uF 8ohm 33uH 21 C5 1uF VCC 20 C8 0.1uF 19 18 G0 17 16 C11 10uF G1 C6 1uF 15 14 13 L2 33uH C16 220nF R4 4.7K C18 470uF 8ohm R_out VCC C9 0.1uF C12 10uF C14 470uF Schematic for Single-Ended (SE) Configuration (8Ω Speaker) PAM8124 Document number: DS36627 Rev. 1 - 2 11 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Application Information (cont.) NEW PRODUCT Typical Applications Circuits (cont.) C7 0.1uF C10 10uF C13 470uF VCC U1 2 3 4 Mute IN+ IN- C1 1uF C2 1uF R1 5 R2 6 7 C4 1uF 8 9 10 C3 1uF 11 12 PVCCL PGNDL SDN PGNDL PVCCL LOUT MUTE LIN RIN VCM BSL AVCC PAM8124 1 SD SE_BTL GAIN0 AGND GAIN1 AGND BSR PVCCR ROUT VCLAMP PGNDR PVCCR PGNDR 24 C15 680nF 23 R3 4.7K L1 22 22uH 21 C5 1uF VCC 20 C8 0.1uF 19 18 8ohm G0 17 16 C11 10uF G1 C6 1uF 15 L2 22uH 14 C16 680nF 13 R4 4.7K VCC C9 0.1uF C12 10uF C14 470uF Schematic for Bridge-Tied-Load (BTL) Configuration with Differential Input (8Ω Speaker) C7 0.1uF C10 10uF C13 470uF VCC U1 2 SD 3 4 Mute IN R1 C1 5 1uF 6 7 C4 1uF 8 9 C3 1uF 10 11 12 PVCCL PGNDL SDN PGNDL PVCCL LOUT MUTE LIN RIN VCM BSL AVCC PAM8124 1 SE_BTL GAIN0 AGND GAIN1 AGND BSR PVCCR ROUT VCLAMP PGNDR PVCCR PGNDR 24 C15 680nF 23 L1 22 21 20 22uH C5 1uF VCC C8 0.1uF 19 18 C11 10uF 8ohm G0 17 16 R3 4.7K G1 C6 15 14 13 1uF L2 22uH C16 680nF R4 4.7K VCC C9 0.1uF C12 10uF C14 470uF Schematic for Bridge-Tied-Load (BTL) Configuration with Single-Ended Input (8Ω Speaker) PAM8124 Document number: DS36627 Rev. 1 - 2 12 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Ordering Information NEW PRODUCT PAM8124 X X X Package Type Package Configuration R: TSSOP Part Number PAM8124RHR Shipping Package H: 24 Pin R: Tape & Real Package TSSOP-24-EP Standard Package 3000 Units/Tape&Reel Marking Information PAM8124 Document number: DS36627 Rev. 1 - 2 PAM8124 X XX YWW LL PVCCL 1 SDN 2 PVCCL 3 MUTE 4 LIN 5 RIN 6 VCM 7 AGND 8 AGND 9 PVCCR 10 VCLAMP 11 PVCCR 12 24 23 22 21 20 19 18 17 16 15 14 13 PGNDL PGNDL LOUT BSL AVCC SE_BTL GAIN0 GAIN1 BSR ROUT PGNDR PGNDR 13 of 15 www.diodes.com PAM8124: Product Code X: Internal Code Y: Year W: Week LL: Internal Code October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 Package Outline Dimensions (All dimensions in mm.) NEW PRODUCT Package: TSSOP-24-EP PAM8124 Document number: DS36627 Rev. 1 - 2 14 of 15 www.diodes.com October 2013 © Diodes Incorporated A Product Line of Diodes Incorporated PAM8124 NEW PRODUCT IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. 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Copyright © 2013, Diodes Incorporated www.diodes.com PAM8124 Document number: DS36627 Rev. 1 - 2 15 of 15 www.diodes.com October 2013 © Diodes Incorporated