DIO2125XM10

Rev 1.6 DIO2125XM10 3Vrms Audio Driver with Adjustable Gain Gai Features Descriptions s Voltage Output at 2.5kΩ Load: The DIO2125 is an integrated solution for 3Vrms With 5V Supply Voltage Set-top top box and high definition player, and Ultra Low Distortion: designed to optimize the audio driver circuit SNR>109dB performance while reducing the BOM cost by Typical Vn5.5V, then IC shutdown PSRR Power supply rejection ratio VDD=4.75V to 5.25V VOH High level output voltage VDD=5V, RL=2.5kΩ VOL Low level output voltage VDD=5V, RL=2.5kΩ IIH EN High level input current IIL EN Low level input current IDD Supply current Typ. Max. 2 Unit mV 5.5 V 85 dB 3.1 V -3.05 V VDD=5V, VI=VDD 1 µA VDD=5V, VI=0V 1 µA VDD=5V, EN= VDD, No load 14 VDD=5V, EN= 0, No load 1.5 mA Operating Characteristics Typical value: VDD=5V, RL=2.5kΩ, CPUMP=0.33 0.33µF, CPVSS=1µF, CIN=10µF, RIN=10kΩ, Rfb=20kΩ, TA=25°C, unless otherwise specified. Symbol VO THD+N XTALK IO SNR Parameter Conditions Min. Typ. Max. Unit Output Voltage THD=1%, VDD=5V, f=1kHz, RL=100kΩ 3.1 Total harmonic distortion + noise VO=3VRMS, f=1kHz 0.001 % Channel crosstalk VO=3VRMS, f=1kHz -100 dB Maximum output current VDD=5V 18 mA Signal noise ratio VO=3VRMS, THD+N=0.1%, BW=22kHz A-weighted 108 dB VRMS SR Slew rate 11.8 V/µs CL Maximum capacitive load 220 pF VN Noise output voltage 6 µVRMS GBW Unity gain bandwidth 8 MHz AVO Open loop voltage gain 150 dB VUVP External under-voltage voltage detection IHys External under-voltage voltage detection hysteresis current fCP Charge pump frequency www.dioo.com BW=20Hz to 22kHz 1.11 1.15 1.205 5 265 V µA 450 kHz © 2018 DIOO MICROCIRCUITS CO., LTD DIO2125• Rev. 1.6 3Vrms Audio Driver with Adjustable Gain Electrical Characteristics DIO2125XM10 At TA = +25℃, CPUMP=0.33µF, CPVSS=1µF, unless otherwise noted. THD+N vs Output Voltage 10 THD+N(%) 1 Vcc=5V,BW=20K,f=1K RL=2.5K 0.1 RL=10K 0.01 1E-3 1E-4 0.1 1 10 Output Voltage(Vrms) 1 THD+N(%) 0.1 THD+N vs Frequency Vcc=5V,Vin=1.5Vrms RL=2.5K RL=10K 0.01 1E-3 1E-4 10 100 1k 10k 100k Frequency(Hz) www.dioo.com © 2018 DIOO MICROCIRCUITS CO., LTD DIO2125• Rev. 1.6 3Vrms Audio Driver with Adjustable Gain Typical Performance Characteristics DIO2125XM10 LEFT INPUT RIGHT INPUT C1 C2 R3 R1 1 R2 R4 TVS Diode -INR RIGHT OUTPUT TVS Diode -INL OUTR LEFT OUTPUT OUTL R11 EN GPIO EN UVP GND R13 R12 (Exposed Pad) 10k PVSS Cy PVDD VDD 0.1uF 1uF 10uF CP CN 0.33uF Important Note: 1. In some applications, if the power supply noise 2. In order to protect the device against the power needs to be filtered, the ferrite bead is recommended surge, transient voltage suppressor (TVS) devices de are in a value of 600ohm@100MHz, instead of RC recommended at the output pins OUTL/OUTR network. RC network normally will lower the power supply resulting in the degraded the audio performance. If the resistor is not chosen properly, TVS Diode which can trigger the internal UVP detection circuit and mute the output. As depicted below. OUT L/R LEFT /RIGHT OUTPUT FB1 PVDD VDD 600ohm@100MHz www.dioo.com © 2018 DIOO MICROCIRCUITS CO., LTD DIO2125• Rev. 1.6 3Vrms Audio Driver with Adjustable Gain Application Circuit DIO2125XM10 Gain-Setting Setting Resistors Ranges and Input-Blocking Input Capacitors The gain-setting resistors, RIN and RFB, must be chosen so that noise, stability, and input capacitor size of the DIO2125 are kept within acceptable limits. Voltage gain is defined as RFB divided by RIN. Table 1 lists the recommended resistor value for different gain settings. Selecting Selecting values that are too low demands a large input ac-coupling coupling capacitor CIN. Selecting values that are too high increases the noise of the amplifier. The gain-setting setting resistor must be placed close to the input pins to minimize capacitive loading on these input pins and to ensure maximum stability. Table 1 Input Capacitor with 2Hz cutoff and Resistor Values Recommended Recommende Input Res., Feedback Res., RIN Rfb 22 kΩ 22 kΩ -1 V/V 15 kΩ 30 kΩ -2 V/V 10 kΩ 100 kΩ -10 V/V Inverting Gain CIN RIN RFB -IN f , π or Inverting + 1 C 2πR f Equation 1 Cutoff decision Cutoff Figure 2 Inverting Gain Configurations INPUT-BLOCKING CAPACITORS DC input-blocking blocking capacitors are required to be added in series with the audio signal signa into the input pins of DIO2125.. These capacitors block the dc portion of the e audio source and allow DIO2125 DIO212 inputs to be properly biased to provide maximum performance. These capacitors form a high-pass pass filter with the input resistor, RIN. The cutoff frequency is calculated using the equation below. For this calculation, the capacitance ca used is the input-blocking blocking capacitor, and the resistance is the input resistor chosen from Table 1; then the frequency and/or capacitance can be determined when one of the two values is given. Charge Pump Flying Capacitor and PVSS Capacitor The charge pump flying capacitor serves to transfer charge during the generation of the negative supply voltage. The PVSS capacitor must be at least equal to the charge pump capacitor in order to allow maximum charge www.dioo.com © 2018 DIOO MICROCIRCUITS CO., LTD DIO2125• Rev. 1.6 3Vrms Audio Driver with Adjustable Gain Application Notes DIO2125XM10 values that are smaller than 0.33μF μF can be used, but the maximum output voltage may be reduced and the device may not operate to specifications. Decoupling Capacitors The DIO2125 requires adequate power supply decoupling to ensure that the noise and total harmonic distortion (THD) are low. A good low equivalent-series-resistance equivalent (ESR) ceramic capacitor, typically a combine of paralleled 0.1µF and 10µF,, placed as close as possible to the device VDD lead works best. Placing this decoupling g capacitor close to the DIO2125 DIO212 is important for the performance of the amplifier. For filtering lower-frequency frequency noise signals, a 10μF or greater capacitor placed near the audio power amplifier would woul also help, but it is not required in most applications because of the high PSRR of this device. Pop-Free Power-Up Pop-free free power up is ensured by keeping the EN (shutdown pin) low during power-supply power supply ramp up and ramp down. The EN pin should be kept low until the input ac-coupling coupling capacitors are fully charged before asserting the EN pin high to achieve pop-less less power up. Figure 4 illustrates the preferred sequence. sequence. Supply Supply Ramp Enable Time for AC -Coupling capacitors to charge Figure 4 Power-Up Sequences Capacitive Load The DIO2125 has the ability to drive a high capacitive load up to 220 pF directly. Higher capacitive loads can be accepted by adding a series resistor of 47Ω 47 or larger. External Under-voltage Detection External under-voltage voltage detection can be used use to shut down the DIO2125 before an input device can generate a pop. Although the shutdown voltage is 1.15V, 1. V, customers need to consider the accuracy of system passive components such as resistors and associated temperature variation. Users often select a resistor divider to obtain the power-on and shutdown threshold for the specific application. The typical thresholds can be calculated as follows,, respectively for VSUP_MO at 5V and 12V. V. Usually for best power down noise performance, 12V www.dioo.com © 2018 DIOO MICROCIRCUITS CO., LTD DIO2125• Rev. 1.6 3Vrms Audio Driver with Adjustable Gain transfer. Low ESR X5 or X7 capacitors are recommended r selection, and a value of 0.33μF 0.33 is typical. Capacitor DIO2125XM10 supply for DIO2125 VDD pins. Case 1: VSUP_MO= 12V (Recommended ecommended) VUVP=(1.15V-6µA*R13)*(R11+R12)/R12; A*R13)*(R11+R12)/R12; Vhysteresis=5µA*R13*(R11+R12)/R12; A*R13*(R11+R12)/R12; With the condition R13>>R11//R12. For example, if R11=11k, k, R12=1.4k R12= and R13=47k, Then VUVP=7.688V; Vhysteresis=2.081V = Here, VUVP is the shutdown threshold. In this case, the voltage at UVP pin 8 is greater than 1.44V V under worst case of VSUP_MO ripples. Case 2: VSUP_MO= 5.0V VUVP=(1.15V-6µA*R13)*(R11+R12)/R12; A*R13)*(R11+R12)/R12; Vhysteresis=5µA*R13*(R11+R12)/R12; A*R13*(R11+R12)/R12; With the condition R13>>R11//R12. For example, if R11=5.6k, k, R12=2.2k R12= and R13=47k, Then VUVP=3.077V; Vhysteresis=0.833V =0. Here, VUVP is the shutdown threshold. In this case, the voltage at UVP pin 8 is greater than 1.44V 1. under worst case of VSUP_MO ripples. For further assistance, please contact DIOO worldwide sales office to seek technical support. You can find DIOO sales office information at www.dioo.com. www.dioo.com © 2018 DIOO MICROCIRCUITS CO., LTD DIO2125• Rev. 1.6 3Vrms Audio Driver with Adjustable Gain supply is recommended for UVP circuitry circuitr as below. Typically this 12V V is the power supply which generates the 5V DIO2125XM10 3Vrms Audio Driver with Adjustable Gain Physical Dimensions: EP-MSOP-10(Exposed Pad) Symbol Min Typ Max A - - 1.10 www.dioo.com A1 0 - 0.15 A2 0.75 0.85 0.95 A3 0.25 0.35 0.39 b 0.18 - 0.27 b1 0.17 0.20 0.23 c 0.15 - 0.20 c1 0.14 0.15 0.16 D 2.90 3.00 3.10 D1 0.75 - 2.50 E 4.70 4.90 5.10 E1 2.90 3.00 3.10 E2 0.75 - 2.50 e 0.40 0.50 0.60 L 0.40 0.60 0.80 L1 0.95REF L2 0.25BSC R 0.07 - - R1 0.07 - - Θ 0° - 8° Θ1 9° 12° 15° © 2018 DIOO MICROCIRCUITS CO., LTD DIO2125• Rev. 1.6 DIO2125XM10 Dioo is a professional design and sales corporation for high-quality high quality and performance analog semiconductors. The company focuses on industry markets, such as, cell phone, handheld products, products laptop, and medical equipment and so on. Dioo’s product families include includ analog signal processing and amplifying, LED drivers d and charger IC. Go to http://www.dioo.com for a complete list of Dioo product families. For additional product information, or full datasheet, please contact with our Sales Department or Representatives. www.dioo.com © 2018 DIOO MICROCIRCUITS CO., LTD DIO2125• Rev. 1.6 3Vrms Audio Driver with Adjustable Gain CONTACT US