LPA2164A POWER | Alldatasheet

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 Integrated boost convertor  Shutdown current:<3uA  Switch on current :3.0A  Internal Compensation  Max duty cycle: 90%  480KHz fixed frequency switching for amplifier work at class_D mode and 900KHz for step up convertor  POUT at 10% THD+N，VIN=3.7V for boost convertor RL=4Ω，POUT=4.8W，boost to 6.0V for amplifier RL=4Ω，POUT=3.1W，boost to 5.0V for amplifier  POUT at 1% THD+N，VIN=3.7V for boost convertor RL=4Ω，POUT=3.6W，boost to 6.0V for amplifier RL=4Ω，POUT=1.8W，boost to 5.0V for amplifier  Filterless, Low Quiescent Current and Low EMI  Amplifier Efficiency up to 84%  Excellent POP&CLICK rejection  OCP, OTP features  Few External Components to Save the Space and cost  Free LC filter digital modulation, direct-drive speakers  Pb-Free Package Marking Information Device Marking Package Shipping LPA2164ASOF LPS LPA2164A YWX SOP-16 3K/REEL Y: Y is year code. W: W is week code. X: X is series number.

Preliminary Datasheet LPA2164A Typical Application Circuit 8 9 16PGND VIN EN AGND SD BYP IN- IN+ MODE OUT- VDD GND OUT+ SW NC FB 8 13 FBSW SD BYP MODE IN+ OUT+ VDD GND OUT- VIN EN LPA2164A VCC C1 C2 104 22uF 4.7uH SS34 C3 C5 470uF 10uF 104 22pF OPTIONAL ON OFF AB ON OFF 105 C11 105 SPEAKER

7 IN-

D INPUT-N C9 R7 INPUT-P 10nF10R

Preliminary Datasheet LPA2164A Functional Pin Description Pin No. PIN Name DESCRIPTION 1 PGND Power ground pin. 2 VIN Power supply for boost convertor. 3 EN Enable pin for boost convertor. Active high. 4 AGND Analog power ground for boost convertor. 5 SD Amplifier Shutdown pin. Active high. 6 BYP Bypass pin. Connect a 1uF capacitor to ground. 7 IN- Negative input of amplifier. 8 IN+ Positive input of amplifier. 9 MODE Class_AB and class_D mode switch pin. Choice class_D mode with high voltage. 10 OUT- Negative output of amplifier. 11 VDD Power supply for amplifier. 12 GND Ground for amplifier. 13 OUT+ Positive output of amplifier. 14 SW Switch pin for boost convertor. 15 NC No connection. 16 FB Feedback pin. Absolute Maximum Ratings Recommended Operating Conditions Thermal Information Parameter Symbol Package Maximum Units Thermal resistance (junction to ambient) θJA SOF16 80 ℃/W Thermal resistance (junction to case) θJC SOF16 36 ℃/W

Preliminary Datasheet LPA2164A Electrical Characteristics For Amplifier (TA = 25° C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Class-D Class-AB Supply power VIN 2.5 6.0 V Output power PO THD+N=10%, f=1KHz,RL=4Ω VDD=6.0V 4.8 4.7 W VDD=5.0V 3.2 3.2 THD+N=10%, f=1KHz,RL=3Ω VDD=6.0V 6.0 5.9 VDD=5.0V 3.8 3.7 THD+N=1%, f=1KHz,RL=4Ω VDD=6.0V 3.4 3.6 VDD=5.0V 2.5 2.6 THD+N=1%, f=1KHz,RL=3Ω VDD=6.0V 4.8 4.7 VDD=5.0V 3.1 3.2 Power supply ripple rejection PSRR INPUT ac-grounded with CIN=0.47uF , VDD=6.0V f=100HZ 75 dB f=1KHz 50 Signal-to-nois e ratio SNR VDD=5V,POUT=0.5W,RL =2Ω f=1KHz 90 91 dB Eifficency η RL=4Ω,PO=0.6W f=1KHz 88 % Quiescent current IQ VDD=5.0V No load 4.65 7 mA Shutdown current ISD 2 uA Offset output voltage VOS VDD=5.0V, VSD =0V 1.1 2 mV Frequency for class_D fsw 480 KHz

Preliminary Datasheet LPA2164A Electrical Characteristics For Boost Convertor (VIN=3.6V,VOUT=5V,CIN=22uF,COUT=22uF//10uF,L=4.7uH) Parameter Conditions Boost of LPA2164A Units Min Typ Max Supply Voltage 2.2 5.5 V Output Voltage Range 6 6.5 V Supply Current(Shutdown) VEN=VOUT=0V, VIN=5V 1 uA Supply Current VEN=VIN=3.6V, VFB=0.6V 150 uA Feedback Voltage 0.588 0.6 0.612 V Feedback Input Current VFB=0.6V 50 nA Switching Frequency 900 KHz Maximum Duty Cycle 90 % EN Input Low Voltage 0.4 V EN Input High Voltage 1.4 V Limit current of power MOSFET 3 A RDS(ON) VOUT=3.3V 100 mΩ

Preliminary Datasheet LPA2164A Typical Operating Characteristic For Amplifier Audio Precision A-A FREQ RESP FAST @ 4ohm PO=4.8W CLASS AB VDD=6V.ats2 ColorSweep Trace Line Style Thick Data Axis Comment 1 1 Cyan Solid 1 Analyzer.Level A Left 1 2 Blue Solid 7 Analyzer.Level B Right Rapid (<2 seconds ) frequency response measurement . Can be even faster if the lowest frequencies are not included . Press F4 to set the 1kHz dbr A and dBr B reference. Optimize for a detailed view. +30 +10 +15 +20 +25 d B r B +30 +10 +15 +20 +25 d B r A 20k 100 200 500 10k Hz Audio Precision A-A FREQ RESP FAST @ 4ohm PO=4.8W CLASS D VDD=6V.ats2 ColorSweep Trace Line Style Thick Data Axis Comment 1 1 Cyan Solid 1 Analyzer.Level A Left 1 2 Blue Solid 7 Analyzer.Level B Right Rapid (<2 seconds ) frequency response measurement . Can be even faster if the lowest frequencies are not included . Press F4 to set the 1kHz dbr A and dBr B reference. Optimize for a detailed view. +30 +10 +15 +20 +25 d B r B +30 +10 +15 +20 +25 d B r A 20k 100 200 500 10k Hz

Preliminary Datasheet LPA2164A Audio Precision A-A THD+N vs FREQUENCY A-A THD+N VS FREQ @4ohm PO=3W CLASS D VDD=6V.ats2 ColorSweep Trace Line Style Thick Data Axis Comment 1 1 Cyan Solid 1 Analyzer.THD+N Ratio B Left 1 2 Blue Solid 7 Analyzer.THD+N Ratio B Right A single sweeps produces a stereo THD +N sweep of Ch A and Ch B when data 1 is set for THD+N and the Stereo box is checked . The upper Analyzer bandwidth is 20kHz. At a 6kHz fundamental only the 2nd and 3rd harmonics are included , above 10kHz only the noise is included in the measurement bandwidth . For band-limited systems IMD testing is better . 0.0001 0.001 0.01 0.1 0.0001 0.001 0.01 0.1 20k 10k 12k 14k 16k 18k Hz Audio Precision A-A THD+N vs FREQUENCY A-A THD+N VS FREQ @4ohm PO=3W CLASS AB VDD=6V.ats2 ColorSweep Trace Line Style Thick Data Axis Comment 1 1 Cyan Solid 1 Analyzer.THD+N Ratio B Left 1 2 Blue Solid 7 Analyzer.THD+N Ratio B Right A single sweeps produces a stereo THD +N sweep of Ch A and Ch B when data 1 is set for THD+N and the Stereo box is checked . The upper Analyzer bandwidth is 20kHz. At a 6kHz fundamental only the 2nd and 3rd harmonics are included , above 10kHz only the noise is included in the measurement bandwidth . For band-limited systems IMD testing is better . 0.0001 0.001 0.01 0.1 0.0001 0.001 0.01 0.1 20k 10k 12k 14k 16k 18k Hz

Preliminary Datasheet LPA2164A

Preliminary Datasheet LPA2164A Typical Operating Characteristic For Boost Convertor Vin=3.3V Vout=5V, 0mA Vin=3.3V Vout=5V, 50mA Vin=3.3V Vout=5V, 100mA Vin=3.3V Vout=5V, 2A Start up wave

Preliminary Datasheet LPA2164A Applications Information(for Amplifier) Maximum Gain The LPA2164A has two internal amplifier stages. The first stage's gain is externally configurable, while the second stage's is internally fixed. The closed-loop gain of the first stage is set by selecting the ratio of Rf to Ri while the second stage's gain is fixed at 2x.The output of amplifier serves as the input to amplifier 2, thus the two amplifiers produce signals identical in magnitude, but different in phase by 180°. Consequently, the differential gain for the IC is Av=20*log [2*(Rf/Ri)] The LPA2164A sets maximum: Rf= 280 k ±10% Class-AB Rf= 280 k ±10% Class -D Shutdown operation In order to reduce power consumption while no t in use, the LPA2164A contains shutdown circuitry to turn off the amplifier's bias circuitry. This shutdown feature turns the amplifier off when logic high is applied to the S D pin. By switching the S D pin connected to high voltage , the LPA2164A supply current draw will be minimized in idle mode. Power supply decoupling The LPA2164A is a high performance CMOS aud io amplifier that requires adequate power supply decoupling to ensure the output THD and PSRR a low as possible. Power supply decoupling affects low frequency response. Optimum decoupling is achieved by using two capacitors of different types targeting to different types of noise on the power supply leads. For higher frequency transients, spikes, or digit al hash on the line, a good low equivalent-series-resistance (ESR) ceramic capacitor, typically 1.0 ìF, works best, placing it as close as possible to the device VDD terminal. For filtering lower - frequency noise signals, a large capacitor of 20 ìF (ceramic) o r greater is recommended, placing it near the audio power amplifier. Short Circuit Protection (SCP) The LPA2164A has short circuit protection circuitry on the outputs to prevent damage to the device when output-to-output or output -to-GND short occurs. When a short circuit is detected on the outputs, the outputs are disabled immediately. If the short was removed, the device activates again. Over Temperature Protection Thermal p rotection on the LPA2164A prevents the device from da mage when the internal die temperature exceeds 150 ℃. There is a 15 degree tolerance on this trip point from device to device. Once the die temperature exceeds the thermal set point, the device outputs are disabled. This is not a latched fault. The thermal fault is cleared once the temperature of the die is reduced by 30℃. This large hysteresis will prevent motor boating sound well and the device begins normal operation at this point without external system intervention. Analog Reference Bypass Capacitor (CBYP) In addition to system cost and size, click and pop performance is affected by the size of the input coupling capacitor, C BYP. A larger input coupling capacitor requires more charge to reach its quiescent DC voltage (nominally 1/2 VDD). This charge comes from the internal circuit via the feedback and is apt to create pops upon device enable. Thus, by minimizing the capacitor size based on necessary low frequency response, turn-on pops can be minimized. The Analog Reference Bypass Capacitor (C BYP) is the most critical capacitor a nd serves several important functions. During start-up or recovery from shutdown mode, C BYP determines the rate at which the amplifier starts up. The second function is to reduce noise caused by the power supply coupling

Preliminary Datasheet LPA2164A into the output drive signal. This noise is from the internal analog reference to the amplifier, which appears as degraded PSRR and THD+N. How to reduce EMI A simple solution is to put an additional capacitor 220pF at power supply terminal for power line. The traces from amplifier to spe akers should design as short as we can. Applications Information(for Boost) The LP2164A integrates a 1200KHz fixed frequency, current-mode regulation architecture to regulate the boost convertor output voltage. The LP 2164A measures the output voltage through an external resistive voltage divider and compares that to the internal 0.6V reference to generate the error voltage to the inductor current to regulate the output voltage. The use of current -mode regulation improves transient response and control loop stability. When the boost convertor is disable d (EN=Low), both power switches are off. There is no current path from SW to OUT. Therefore, the output voltage discharges to ground. When the boost convertor is enabled (EN=High), a limited start -current charges the output voltage rising to SW, then TH part operates in force PWM mode for regulating the output voltage to the target value. At the beginning of each cycle, the N-channel MOSFET switch is turned on, forcing the inductor current to rise. The current at the source of the switch is internally measured and converted to a voltage by the current sense amplifier. That voltage is compared to the error voltage. When the inductor current rises sufficiently, the PWM comparator turns off the switch, forcing the inductor current to the output capacitor which forces the inductor current to decrease. The peak inductor current is controlled by the error voltage. Thus the output voltage controls the inductor current to satisfy the lode. Setting the Output Voltage Set the output voltage by selecting the resistive voltage divider ratio. The voltage divider drops the output voltage to the 0.6V feedback voltage. Use a 100K resistor for R2 of the voltage divider. Determine the high-side resistor R1 by the equation: Vout=(R1/R2+1) x VFB Vout=(R1/R2+1) x 0.6V

Preliminary Datasheet LPA2164A PCB Layout notices 1, In the path of the power supply, plus a 1uF and a 10uF to ground high-frequency filter capacitor. These caps can be connected to the thermal pad directly for an excellent ground connection. Consider adding a small, good quality low ESR ceramic capacitor may achieve better sound effects. 2, Large (470 µF or greater) bulk power supply decoupling capacitors should be placed near the LPA2164A on the VDD supplies. Local, high -frequency bypass capacitors should be placed as close to the VDD pins as possible. 3, Th e power line, ground line and filter capacitor and bypass capacitors as close to the chip's pins, remember not to put the capacitor on the back of the board, through tiny holes through the jumper even over. Keep the current loop from each of the outputs th rough the ferrite bead and the small filter cap and back to PGND as small and tight as possible. The size of this current loop determines its effectiveness as an antenna. 4, Power, ground, and a large current line must try to be wide enough, if you want to add vias, the number of through-holes must be at least 6. The thermal pad must be soldered to the PCB for proper thermal performance and optimal reliability. 5, GND and VDD should be put independently, high-power signals to avoid interference. 6, If you want to pursue as large as the effect of power, a large selection of speakers or sound chamber with low resistance (such as 3.6Ù) speakers, or added to improve the supply voltage boost circuit. 7, Including the line between large current cell and chip, the inductor should be as close and short as possible to chip for a high performance. Adding a coil to this pin would be helpful for EMI certification. If there is a high standards needed in LPA2164A application, we could add a coil and capacitor between chi p and speaker constituting a LC filter which coil would be 100MHz, 100~150Ω and its DCI beyond 3A placing as close as possible to chip, the capacitor should be 1nF connecting the PGND. 8, The position under the amplifier chip on the board must be added vents and large areas of exposed copper and tin to enhance heat dissipation. 9, In case of fixed gain and meeting demand, it should make C IN small as possible as we can because it constitute a high through filter with Rin which cutoff frequency is 1/2*3.414* Cin*Rin. A high capacitance cap could make POP worse. PCB LAYOUT

Preliminary Datasheet LPA2164A Recommend Application Case1: Bluetooth Speaker Box—— Charge(1A) + 5W Class F Amplifier FBSW SD BYP MODE IN- OUT+ VDD GND OUT- VIN EN LPA2164A IN- C1 C2 104 22uF 4.7uH SS34 C3 C5 470uF 10uF 104 22pF OPTIONAL ON OFF AB ON OFF 105 IN+ C11 105 SPEAKER

8 IN+

D SD MODE CHRG_S ACIN BATT LP28019SPF ISETA GND 4,9 Rset Battery CHARGE VIN C18 22uF C19 10uFR11 1KΩ LED 10nF10R

Preliminary Datasheet LPA2164A Case2: Bluetooth Speaker Box with Power Bank—— Charge(1A) +Boost(2A) +(2×5W) Class F Amplifier FBSW SD BYP MODE IN- OUT+ VDD GND OUT- VIN EN LPA2164A C1 C2 104 22uF 4.7uH SS34 C3 C5 470uF 10uF 104 22pF OPTIONAL ON OFF AB ON OFF 105 INL- C11 105 SPEAKER IN+ C9 R6 PGND AGND C12 105 D SD MODE CHRG_S ACIN BATT LP28019SPF ISETA GND 4,9 Rset Battery CHARGE VIN C18 22uF C19 10uFR11 1KΩ LED 7 13 FBSW SD BYP MODE IN- OUT+ VDD GND OUT- VIN EN LPA2164A C12 C22 104 22uF L12 4.7uH SS34 C32 C52 470uF C42 10uF 104 C62 22pF OPTIONAL R22 ON OFF AB ON OFF C72 105 C112 105 SPEAKER D R12 INR+ INR- LX VIN ENVREFN VOUT FB LP6253H CIN Power Bank Output：5V COUT Chip Enable 2.2nF L GND VBUS GND 7,8 5 4 1,2 C8 R61 R612 10nF10R 10nF10R INL+ Classical Application Charger Boost Amplifier LP28056S(1A Linear Charger, ESOP8) LP6253H(2.4A Synchronous Boost, ESOP8) LPA2173(8W Class_F, EQ, ESOP8) LP28019(1A Linear Charger, ESOP8) LP6212(2A Boost, ESOP8 & SOT23-6) LPA2174(8W Differential Input, ESOP8) LP28301(5A Switch Charger, QFN28) LP6255(External MOS, Syn, TQFN-20) LPA2164A(6W Class_F with Boost, EQ, SOP16)

Preliminary Datasheet LPA2164A Packaging Information SOP-16