® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) FEATURES GENERAL DESCRIPTION 2.5 W/CH Into 4Ω from 5V power supply at THD = 10% (Typ.). 2.5V~5.5V Power supply. Low shutdown Current. Low Quiescent Current. Minimum external components. No output filter required for inductive loads. Output Pin Short-Circuit Protection (Short to Output Pin, Short to GND, Short to VCC) Low noise during turn-on and turn-off transitions. Lead free and green package available. (RoHS Compliant) Wafer Chip Scale (WCSP) and TSSOP 20 pin packaging available. The LY8210 is a high efficiency, 2.5 W stereo class D audio power amplifier. It is a low noise, filterless PWM architecture eliminates the output filter, reducing external component count, system cost, and simplify design. The LY8210 is designed to meet of Multimedia application includes mobile phones and other portable electronic devices. The LY8210 is a single 5V supply, it is capable of driving 4Ω speaker load at a continuous average output of 2.5 W/CH with 10% THD+N. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the LY8210. Output pin short circuit ( short to output pin, short to ground and short to VDD ) protection prevent the device from damage during fault conditions. APPLICATION Portable electronic devices Mobile Phones, PDAs DVD/CD Players, TFT LCD TVs/Monitors USB Audio, 2.1 / 5.1 CH Audio System BLOCK DIAGRAM Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 1 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) PIN CONFIGURATION LY8210 WCSP 18 Ball Pin Configuration (Top View) LY8210 TSSOP20 Pin Configuration (Top View) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 2 ® LY8210 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Rev. 1.7 PIN DESCRIPTION SYMBOL Pin No. WCSP DESCRIPTION TSSOP SDL A2 4 Shutdown pin of left channel. (when low level is active the pin). INPL(+) C3 5 Positive(+) input of left channel. INNL(-) A3 17 Negative(-) input of left channel. VOPL(+) A1 19 Positive(+) BTL output of left channel. VONL(-) C1 1 Negative(-) BTL output of left channel. B3/B4 6/16 Analog Power supply of left and right channel. Power supply of left and right channel. AVDD VDD B2/B5 3/13 Vss C2/A5 B1/B6 8/11/18/20 SDR C5 14 Ground Shutdown pin of right channel. (when low level is active the pin). INPR(+) A4 7 Positive(+) input of right channel. INNR(-) C4 15 Negative(-) input of right channel. VOPR(+) C6 12 Positive(+) BTL output of right channel. VONR(-) A6 10 Negative(-) BTL output of right channel. NC -- 2/9 No Connection. ORDERING INFORMATION LY 8 210 VV V : Package Type CL : WSCP Package AL : 20-PIN TSSOP with Thermal Pad IL : 20-PIN TSSOP without Thermal Pad Product Name A : Product Line LY : Lyontek Product Number Prefix Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 3 ® LY8210 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Rev. 1.7 PACKAGE MARKING FORMAT (For WCSP Package only) AA B C C : Lot Number B : Date Code Product Name TYPICAL APPLICATION CIRCUIT Figure 1. Typical Application Schematic With Differential Input and AVDD Connect to VDD Configuration (WCSP package) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 4 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Figure 2. Typical Application Schematic With Differential Input and AVDD Increase Capacitors Configuration(WCSP package). Note: In case of AVDD and VDD, the use of AVDD Increase Capacitors will optimize the THD+N. ABSOLUTE MAXIMUN RATINGS* PARAMETER Supply Voltage Operating Temperature Input Voltage Storage Temperature Power Dissipation ESD Susceptibility Junction Temperature Soldering Temperature (under 10 sec) SYMBOL VDD TA VI TSTG PD VESD TJMAX TSOLDER RATING 6.0 -40 to 85 (I grade) -0.3V to VDD +0.3V -65 to 150 Internally Limited 2000 150 260 Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 5 UNIT V ℃ V ℃ W V ℃ ℃ ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) ELECTRICAL CHARACTERISTICS (TA = 25℃) PARAMETER Output offset voltage (measured differentially) High-level input current Low-level input current SYMBOL |VOS| |IIH| |IIL| Quiescent Current IQ Shutdown Current ISD TEST CONDITION VI = 0 V, Av = 2 V/V, VDD = 2.5 V to 5.5 V VDD = 5.5 V, VI = 5.8 V VDD = 5.5 V, VI = 0.3 V VDD = 5.5V, No Load VDD = 3.6V, No Load VDD = 2.5V, No Load VSHUTDOWN = 0.8V, VDD = 2.5V to 5.5V MIN. TYP. MAX. UNIT - - 50 mV - 6.8 5.6 4.4 200 10 9.0 6.4 uA uA - 0.6 4 mA µA OPERATING CHARACTERISTICS (1)(TA = 25℃, Gain = 2 V/V) PARAMETER Out Power / Channel SYMBOL TEST CONDITION THD+N= 10%, f = 1 kHz, RL= 8Ω VDD=5.0V THD+N= 1%, f = 1 kHz, RL= 8Ω VDD=5.0V PO THD+N= 10%, f = 1 kHz, RL= 4Ω THD+N= 1%, f = 1 kHz, RL= 4Ω PO = 1.0 W, f = 1 kHz, RL = 8Ω PO = 2.0 W, f = 1 kHz, RL = 4Ω PO = 0.5 W, f = 1 kHz, RL = 8Ω Total harmonic distortion + THD+N noise PO = 0.8 W, f = 1 kHz, RL = 4Ω PO = 0.2 W, f = 1 kHz, RL = 8Ω PO = 0.2 W, f = 1 kHz, RL = 4Ω Power supply rejection ratio PSRR VDD = 2.5 V to 5.5 V Common mode rejection ratio CMRR VIC = 1 Vpp , f = 217 Hz Signal-to-noise ratio SNR PO= 1.0 W, RL = 8Ω VDD = 3.6 V, f = 20 Hz to 20 kHz, Output voltage noise Vn Inputs ac-grounded with Ci = 2 μF Closed-loop Gain Gv VDD = 2.5V to 5.5V Start-up time from shutdown ZI VDD = 2.5V to 5.5V VDD=3.6V VDD=2.5V VDD=3.6V VDD=2.5V VDD=5.0V VDD=3.6V VDD=2.5V VDD=5.0V VDD=3.6V VDD=2.5V MIN. - TYP. 1.5 0.7 0.35 1.2 0.6 0.3 2.5 1.2 0.5 2.0 0.9 0.4 MAX. - - 0.03 - - 0.06 - - 0.03 - - 0.04 - - 0.04 - - 0.04 - - -75 -63 91 - - 50 - - 36 - - 150kΩ/Ri - W VDD=5.0V % VDD=3.6V VDD=2.5V VDD=3.6V VDD=5.0V No weighting A weighting Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 6 UNIT dB dB dB uVRMS 1 V/V ms ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) TYPICAL PERFORMANCE CHARACTERISTICS Figure 3 Total Harmonic Distortion + Noise vs Output Power (RL = 4Ω, Stereo) Figure 4 Total Harmonic Distortion + Noise vs Output Power (RL = 8Ω, Stereo) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 7 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Figure 5 Total Harmonic Distortion + Noise vs Frequency (VDD=5.0V, 4Ω) Figure 6 Total Harmonic Distortion + Noise vs Frequency (VDD=3.6V, 4Ω) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 8 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Figure 7 Total Harmonic Distortion + Noise vs Frequency (VDD=2.5V, 4Ω) Figure 8 Total Harmonic Distortion + Noise vs Frequency (VDD=5.0V, 8Ω) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 9 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Figure 9 Total Harmonic Distortion + Noise vs Frequency (VDD=3.6V, 8Ω) Figure 10 Total Harmonic Distortion + Noise vs Frequency (VDD=2.5V, 8Ω) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 10 ® LY8210 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Rev. 1.7 Figure 11 Efficiency vs Output power ( RL=4Ω, 33μH) LY8210 4 Ohm Rfficiency vs Output Power 100 90 Efficiency (%) 80 70 60 3.6V 5.0V 50 40 30 20 10 0.2 0.3 0.4 0.5 0.6 0.8 1.0 1.2 1.4 1.6 2 2.5 Output Power (W) Figure 12 Efficiency vs Output power ( RL=8Ω, 33μH) LY8210 RL=8 Ohm Efficiency vs Output Power 100 90 Efficiency (%) 80 70 60 3.6V 5.0V 50 40 30 20 10 0.1 0.2 0.3 0.4 0.5 0.6 0.8 1.0 1.2 Output Power (W) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 11 1.4 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) APPLICATION INFORMATION Fully Differential Amplifier The LY8210 is a fully differential amplifier with differential inputs and outputs. The fully differential amplifier consists of a differential amplifier and a common-mode amplifier. The differential amplifier ensures that the amplifier outputs a differential voltage on the output that is equal to the differential input times the gain. The common-mode feedback ensures that the common-mode voltage at the output is biased around VDD/2 regardless of the common-mode voltage at the input. The fully differential LY8210 can still be used with a single-ended input; however, the LY8210 should be used with differential inputs when in a noisy environment, like a wireless handset, to ensure maximum noise rejection. Figure 13. Application Schematic With Differential Input Configuration(WCSP Package) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 12 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Figure 14. Application Schematic With Differential and Capacitors Input Configuration(WCSP Package) Figure 15. Application Schematic With Single-Ended Input Configuration(WCSP Package) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 13 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Figure 16. Application Schematic With Differential and Capacitors Input Configuration(TSSOP Package) Figure 17. Application Schematic With Single-Ended Input Configuration(TSSOP Package) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 14 ® LY8210 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Rev. 1.7 Input Resistors (Ri) and Gain The LY8210 has two internal amplifier stages. The pre-amplifier gain is externally configurable, while the total gain is internally fixed. The closed-loop gain of the pre-amplifier gain is set by selecting the Rf to Ri while the total gain is fixed at 2x. So the input resistors (Ri) set the gain of the amplifier according to the equation. Pre-Amplifier Gain = Rf / Ri Total Gain = (Rf / Ri ) x 2 AVD = 20 x log [2 x (Rf /Ri )] The resistor matching is very important in the amplifiers. Balance of the output on the reference voltage depends on matched ratio of the resistors. CMRR, PSRR, and cancellation of the second harmonic distortion if resistor mismatch occurs. Therefore, it is recommended to use 1% tolerance resistors or better to keep the performance optimized. Matching is more important than overall tolerance. Resistor arrays with 1% matching can be used with a tolerance greater than 1%.Place the input resistors very close to the LY8210 to limit noise injection on the high-impedance nodes. For optimal performance the gain should be set to 2 V/V or lower. Lower gain allows the LY8210 to operate at its best, For example Table 1. Typical Total Gain and AVD Values Rf (KΩ) 150 150 150 150 150 150 Ri (KΩ) 150 75 50 37.5 25 18.75 Pre AMP. Gain 1 2 3 4 6 8 Total Gain 2 4 6 8 12 16 AVD (db) 6.02 12.04 15.56 18.06 21.58 24.08 Input Capacitors (Ci) The LY8210 using fully differential source, So the input coupling capacitors are required. The input capacitors and input resistors form a high-pass filter with the corner frequency(fc), determined in the equation. fc = 1 / ( 2πRi Ci ) The value of the input capacitor is important to consider as it directly affects the bass (low frequency) performance of the circuit. Speakers in wireless phones cannot usually respond well to low frequencies, so the corner frequency can be set to block low frequencies in this application. Equation is reconfigured to solve for the input coupling capacitance. Ci = 1 / ( 2πRi fc ) If the corner frequency is within the audio band, the capacitors should have a tolerance of ±10% or better, because any mismatch in capacitance causes an impedance mismatch at the corner frequency and below. Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 15 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) For example In the table 2 shows the external components. Rin in connect with Cin to create a high-pass filter. Table 2. Typical Component Values Reference Description Note Ri 150KΩ 1% tolerance resistors Ci 0.22uF 80%/–20% Ci = 1 / ( 2πRi fc) Ci = 1 / ( 2π x 150KΩ x 4.8Hz)=0.221uF，Use 0.22uF Decoupling Capacitor (CS) The LY8210 is a high-performance class-D audio amplifier that requires adequate power supply decoupling to ensure the efficiency is high and total harmonic distortion (THD) is low. For higher frequency transients, spikes, or digital hash on the line, a good low equivalent-series-resistance (ESR) ceramic capacitor, typically 1.0uF, placed as close as possible to the device VDD lead works best. Placing this decoupling capacitor close to the LY8210 is very important for the efficiency of the class-D amplifier, because any resistance or inductance in the trace between the device and the capacitor can cause a loss in efficiency. For filtering lower-frequency noise signals, a 10.0uF or greater capacitor placed near the audio power amplifier would also help, but it is not required in most applications because of the high PSRR of this device. PCB Layout All the external components must place very close to the LY8210. The input resistors need to be very close to the LY8210 input pins so noise does not couple on the high impedance nodes between the input resistors and the input amplifier of the LY8210. Then place the decoupling capacitor Cs, close to the LY8210 is important for the efficiency of the class-D amplifier. Any resistance or inductance in the trace between the device and the capacitor can cause a loss in efficiency. Making the high current traces going to VDD, GND, VO+ and VO- pins of the LY8210 should be as wide as possible to minimize trace resistance. If these traces are too thin, the LY8210's performance and output power will decrease. The input traces do not need to be wide, but do need to run side-by-side to enable common-mode noise cancellation. Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 16 ® LY8210 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Rev. 1.7 LY8210CL Demo Board Artwork Top Silkscreen Top Layer Composite view Bottom Layer LY8210 V1.1 BOM List No. Description Reference 1 Resistor, 150KΩ R1,R2,R3,R4,R5,R6 2 Capacitor, 0.1uF C6,C7,C8 3 Capacitor, 0.22uF C1,C2,C3,C4 4 Capacitor, 10.0uF C5 5 LY8210CL U1 6 1*2 Pin Header J1,J2 Note Close Æ Active Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 17 ® LY8210 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) Rev. 1.7 LY8210AL/IL Demo Board Artwork Top Silkscreen Top Layer Composite view Bottom Layer LY8210 V1.1 BOM List No. Description Reference 1 Resistor, 150KΩ R1,R2,R3,R4,R5,R6 2 Capacitor, 0.1uF C6,C7,C8 3 Capacitor, 0.22uF C1,C2,C3,C4 4 Capacitor, 10.0uF C5 5 LY8210AL/IL U1 6 1*2 Pin Header J1,J2 Note Close Æ Active Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 18 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) PACKAGE OUTLINE DIMENSION 18 Ball WCSP Package Outline Dimension Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 19 ® LY8210 Rev. 1.7 2.5 W/CH Stereo Class D Audio power Amplifier (WCSP/ TSSOP) TSSOP 20 Pin Package Outline Dimension Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 20