YD1502 规格书.pdf

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1、YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 1 20W Stereo Class-D Audio Amplifier With Power Limit And Dynamic Temperature Control General Description The YD1502 is a high efficiency stereo Class-D audio amplifier with adjustable power limit function and dynamic temperature control.The loud

2、speaker driver operates from 826V supply voltage and analog circuit operates at 3.3V supply voltage.It can deliver 20W/CH output power into 8 loudspeaker within 0.2%THD+N and without external heat sink when playing music.YD1502 provides parallel BTL(Mono)application,and it can deliver 40W into 4 lou

3、dspeaker within 0.11%THD+N.The adjustable power limit function allows user to set a voltage rail lower than half of 3.3V to limit the amount of current through the speaker.Output DC detection prevents speaker damage from long-time current stress.The dynamic temperature control is a gain control syst

4、em.As chip junction temperature higher than a warning level,the gain level will decrease until junction temperature lower than the warning level.The output short circuit and over temperature protection include auto-recovery feature.The YD1502 is available in a thermally enhanced eTSSOP-28 package.Fe

5、atures Single supply voltage-8V 26V for loudspeaker driver-Built-in LDO output 3.3V for others Loudspeaker power from 24V supply-BTL Mode:20W/CH into 8 0.2%THD+N-PBTL Mode:40W/CH into 4 0.11%THD+N Loudspeaker power from 13V supply-BTL Mode:10W/CH into 8 10%THD+N 87%efficient Class-D operation elimin

6、ates need for heat sink Differential inputs Four selectable,fixed gain settings Internal oscillator Short-Circuit protection with auto recovery option Under-voltage detection Over-voltage protection Pop noise and click noise reduction Adjustable power limit function for speaker protection Output DC

7、detection for speaker protection Filter-Free operation Over temperature protection with auto recovery Dynamic temperature control prevents chip from over heating Applications TV audio Bluetooth speaker system Docking speaker system Consumer audio equipment YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司

8、源达科技香港有限公司 2 Typical Application Circuit Figure 1 Typical Application Circuit(for BTL Stereo,Single-ended Input)Figure 2 Typical Application Circuit(for Parallel BTL Mono,Single-ended Input)YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 3 Pin Configuration Package Pin Configuration(Top View)e

9、TSSOP-28 Ordering Information Order Number Package TypeQTY/Reel Operating Temperature Range YD1502IAB28EeTSSOP-28 2500-40C +85C YD1502 Environmental Code E:RoHS Pin Code 28:28 Pins Package Type AB:eTSSOP Temperature Code I:Industrial,-40C +85C YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 4

10、Pin Description No.Pin Description 1 SDB Shutdown signal for IC(Low=disabled,output Hi-Z;High=operational).Voltage compliance to 26V.2 FAULTB Open drain output used to display short circuit or dc detect fault.Voltage compliant to 26V.Short circuit faults can be set to auto-recovery by connecting FAU

11、LTB pin to SDB pin.Otherwise,both short circuit faults and dc detect faults must be reset by cycling VCC.3 INL+Positive audio input for left channel.Biased at 1.65V.4 INL-Negative audio input for left channel.Biased at 1.65V.5 GAIN0 Gain select least significant bit.Voltage compliance to 26V.6 GAIN1

12、 Gain select most significant bit.Voltage compliance to 26V.7,13,17,21,22,26 NC Not connected.8 AGND Analog signal ground.Connect to the thermal pad.9 AVDD 3.3V regulated output.10 PLIM Power limit level adjustment.Connect a resistor divider from AVDD to GND to set power limit.Give VPLIMIT 1.55V)and

13、 GND are all without power limit feature.11 INR-Negative audio input for right channel.Biased at 1.65V.12 INR+Positive audio input for right channel.Biased at 1.65V.14 PBTL Parallel BTL mode switch,high for parallel BTL output.Voltage compliance to 26V.15,16 VCCR High-voltage power supply for right-

14、channel.Right channel and left channel power supply inputs are connect internal.18 OUTR+Class-D H-bridge positive output for right channel.19 PGND Power ground for the H-bridges.20 OUTR-Class-D H-bridge negative output for right channel.23 OUTL-Class-D H-bridge negative output for left channel.24 PG

15、ND Power ground for the H-bridges.25 OUTL+Class-D H-bridge positive output for left channel.27,28 VCCL High-voltage power supply for left-channel.Right channel and left channel power supply inputs are connect internal.Thermal Pad Connect to GND.YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 5

16、 Absolute Maximum Ratings Supply voltage(VCCR,VCCL),VCC-0.3V +30V Interface pin voltage(SDB,GAIN0,GAIN1,PBTL,FAULTB)-0.3V +26V (PLIM,INL+,INL-,INR+,INR-)-0.3V +3.6V Minimum load resistance,RL,(BTL:VCC 15V)-4.8 (BTL:VCC 15V)-3.2 PBTL-3.2 Operating temperature range,TA-40C +85C Junction temperature,TJ

17、MAX-+150C Storage temperature range,TSTG-65C +150C Thermal resistance,JA-28C/W ESD(HBM)-2kV Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device.These are stress ratings only,and functional operation of the device at these or any other conditions beyon

18、d those indicated under recommended operating conditions is not implied.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.DC Electrical Characteristics VCC=24V,TA=25C,RL=8(unless otherwise noted).Symbol Parameter Condition Min.Typ.Max.UnitVCC Supply vol

19、tage to VCCR,VCCL 8 26 V VSDB=2V,no load 32 50 ICC Quiescent current VSDB=2V,no load,VCC=12V 20 35 mA VSDB=0.8V,no load 10 25 ISD Shutdown current VSDB=0.8V,no load,VCC=12V 10 25 A Drain-source on-state resistance-High side PMOS 300 RDS(ON)Drain-source on-state resistance-Low side NMOS VCC=12V,Id=50

20、0mA,TJ=25C 200 m VOS Class-D output offset voltage(measured differentially)VI=0,Gain=36dB 10 mV Gain1=0.8V,Gain0=0.8V 18 20 22 Gain1=0.8V,Gain0=2V 24 26 28 Gain1=2V,Gain0=0.8V 30 32 34 G Gain Gain1=2V,Gain0=2V 34 36 38 dB tON Turn-on time VSDB=2V 51 ms tOFF Turn-off time VSDB=0.8V 4 s AVDD Internal

21、regulated output IAVDD=0.1mA 3.0 3.3 3.6 V Logic Electrical Characteristics VIH High level input voltage SDB,GAIN0,GAIN1,PBTL 2 V VIL Low level input voltage SDB,GAIN0,GAIN1,PBTL 0.8 V VOL Low level output voltage FAULTB,RPU=100k,VCC=26V 0.8 V IIH High level input current SDB,GAIN0,GAIN1,PBTL,VI=2V,

22、VCC=18V 50 A IIL Low level input current SDB,GAIN0,GAIN1,PBTL,VI=0.8V,VCC=18V 5 A YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 6 AC Electrical Characteristics VCC=24V,TA=25C,RL=8(unless otherwise noted).Symbol Parameter Condition Min.Typ.Max.UnitTHD+N=10%,f=1kHz,VCC=13V 10 PO Output power T

23、HD+N=10%,f=1kHz,VCC=16V 15 W VCC=24V,RL=8,f=1kHz,PO=15W(half-power)0.1 THD+N Total harmonic distortion+noise VCC=12V,RL=8,f=1kHz,PO=5W(half-power)0.11%VN Output integrated noise 20Hz to 22kHz,A-weighted filter,Gain=20dB,RL=8 130 V SNR Signal-to-noise ratio Maximum output at THD+N 1%,f=1kHz,Gain=20dB

24、,A-weighted 102 dB PSRR Power supply ripple rejection 200mVP-P ripple at 1kHz,Gain=20dB,Inputs ac-coupled to AGND -62 dB XTALK Crosstalk f=1kHz,VO=1Vrms,Gain=20dB -83 dB fOSC Oscillator frequency 250 310 kHz TSD Thermal trip point 170 C TSD_HY Thermal hysteresis 20 C YD1502 2*20W D 类音频功率放大器类音频功率放大器

25、源达科技香港有限公司 源达科技香港有限公司 7 Typical Performance Characteristics THD+N(%)Output Power(W)0.01200.1.11010m8020m50m 100m500m 1251020RL=4+33HGain=20dBf=1kHzVCC=8VVCC=10VVCC=12VVCC=15V Figure 3 THD+N vs.Output Power THD+N(%)Output Power(W)0.01200.1.11010m5020m50m 100m500m 1251020RL=8+66HGain=20dBf=1kHzVCC=12V

26、VCC=15VVCC=24VVCC=18V Figure 5 THD+N vs.Output Power Output Power(W)Efficiency(%）010203040506070809010005101520253035404550RL=6+47HGain=20dBVCC=18VVCC=12VVCC=15V Figure 7 Efficiency vs.Output Power THD+N(%)Output Power(W)0.01200.1.11010m8020m50m 100m500m 1251020RL=6+47HGain=20dBf=1kHzVCC=12VVCC=15VV

27、CC=24VVCC=18V Figure 4 THD+N vs.Output Power Frequency(Hz)THD+N(%)20501002005001k2k5k20k0.001200.01.0.115VCC=24VGain=20dBRL=8+66HPo=1WPo=5WPo=10W Figure 6 THD+N vs.Frequency Output Power(W)Efficiency(%）0102030405060708090100051015202530354045505560RL=8+66HGain=20dBVCC=12VVCC=24VVCC=18VVCC=15V Figure

28、 8 Efficiency vs.Output Power YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 8 PSRR(dB)2020k501002005001k2k5k10kFrequency(Hz)+0-100-80-60-40-20RL=8+66HGain=20dBVRipple=0.2VPPVCC=12VVCC=18VVCC=24V Figure 9 PSRR YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 9 Functional Block Diagram PG

29、NDVCCROUTR+VCCLINR+INR-Gain Gontrol AmplifierPowerStagePLIMITModulatorPLIMINL-INL+OUTL+OUTR-Dynamic Temperature ControlPWMLogicOUTL-DCDetectPLIMITGain Gontrol AmplifierPowerStageModulatorPWMLogicShort-CircuitProtectionPBTLSelectRampGeneratorBias&ReferencePLIMITReferenceControl LogicThermalDetectUnde

30、r-VoltageProtectionFAULTBLogicGainSelectI/O BufferPBTL SelectShort Circuit ErrorDC Detect ErrorRegulatorThermalWarningThermalWarningPGNDFAULTBAGNDAVDDGAIN0GAIN1SDBPBTL YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 10 Applications Information Gain Settings The gain of the YD1502 is set by two

31、 input pins,GAIN0 and GAIN1.By varying input resistance in YD1502,the various volume gains are achieved.The respective volume gain and input resistance are listed in Table 1.However,there is 20%variation in input resistance from production variation.Table 1 Volume gain and input impedance GAIN1 GAIN

32、0 Volume Gain(dB)Input Resistance,RIN(k)0 0 20 60 0 1 26 30 1 0 32 15 1 1 36 9 Shutdown(SDB)Control Pulling SDB pin low will let YD1502 operate in low-current state for power conservation.The YD1502 outputs will enter mute once SDB pin is pulled low,and regulator will also disable to save power.If l

33、et SDB pin floating,the chip will enter shutdown mode because of the internal pull low resistor.For the best power-off performance,place the chip in the shutdown mode in advance of removing the power supply.DC Detection YD1502 has dc detection circuit to protect the speakers from DC current which mi

34、ght be occurred as input capacitor defect or inputs short on printed circuit board.The detection circuit detects first volume amplifier stage output,when both differential outputs voltage become higher than a determined voltage or lower than a determined voltage for more than 420ms,the dc detect err

35、or will occur and report to FAULTB pin.At the same time,loudspeaker drivers of right/left channel will disable and enter Hi-Z.This fault cant be cleared by cycling SDB,it is necessary to cycle the VCC supply.The minimum differential input voltages required to trigger the DC detect function are shown

36、 in table2.The input voltage must keep above the voltage listed in the table for more than 420msec to trigger the DC detect fault.The equivalent class-D output duty of the DC detect threshold is listed in table3.For 8V supply,DC detect fault will occur as output duty exceed 13%for more than 420msec.

37、Table 2 DC Detect Threshold AV(dB)VIN(mV,differential)20 104 26 52 32 26 36 16 Table 3 Output DC Detect Duty(for Either Channel)VCC(V)Output Duty Exceeds 8 13%12 8.7%16 6.5%24 4.3%Thermal Protection If the internal junction temperature is higher than 170oC,the outputs of loudspeaker drivers will be

38、disabled and at low state.The temperature for YD1502 returning to normal operation is about 150oC.The variation of protected temperature is about 10%.Thermal protection faults are not reported on the FAULTB pin.Short-Circuit Protection To protect loudspeaker drivers from over-current damage,YD1502 h

39、as built-in short-circuit protection circuit.When the wires connected to loudspeakers are shorted to each other or shorted to GND or to VCC,overload detectors may activate.Once one of right and left channel overload detectors are active,the amplifier outputs will enter a Hi-Z state and the protectio

40、n latch is engaged.The short protection fault is reported on FAULTB pin as a low state.The latch can be cleared by reset SDB or power supply cycling.The short circuit protection latch can have auto-recovery function by connect the FAULTB pin directly to SDB pin.The latch state will be released after

41、 420ms,and the short protection latch will re-cycle if output overload is detected again.Under-Voltage Detection When the AVDD voltage is lower than 2.7V or the VCC is lower than 7.5V,loudspeaker drivers of right/left channel will be disabled and kept at low state.Otherwise,YD1502 return to normal o

42、peration.YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公司 源达科技香港有限公司 11 Over-Voltage Protection When the VCC is higher than 30V,loudspeaker will be disabled kept at low state.The protection status will be released as VCC lower than 28.7V.Power Limit Function The voltage at PLIM pin(pin 10)can used to limi

43、t the power of first gain control amplifier output.Add a resistor divider from AVDD to ground to set the voltage VPLIMIT at the PLIMIT pin.The voltage VPLIM sets a limit on the output peak-to-peak voltage.The maximum BTL output voltage of the gain control amplifier is limited to 2(1.55VVPLIM).The Cl

44、ass-D BTL output voltage on loudspeaker is amplified by 9.95 of 2(1.55VVPLIM).For normal BTL operation(Stereo)and PBTL(Mono)operation:LPOUTRVP295.922 for unclipped power(1)Where:-VP is the peak voltage of gain control amplifier output,if(VINGv/2)(1.55VVPLIM),then VP=(1.55VVPLIM).-VIN is the input pe

45、ak voltage.-Gv is the gain of gain control amplifier,the four gain levels are 1V/V,2V/V,4V/V,6.34V/V,corresponding to 20dB,26dB,32dB,36dB overall gain.-AVDD is the regulator output at pin 9,typical 3.3V.-RL is the load resistance.-POUT(10%THD)=1.25 x POUT(unclipped).Figure 10 Gain Contribution of th

46、e Two Gain Stages Table 4 PLIM Typical Operation Test ConditionsOutput PO(W)VPLIM(V)THD+N=1%VPLIM(V)THD+N=10%Output Voltage(VP-P)25 0.54 0.65 40 20 0.65 0.75 35.6 15 0.77 0.85 30.8 10 0.91 0.98 25.2 VCC=24VRL=8 5 1.1 1.15 17.8 Note:Connect PLIM pin to AVDD(1.55V)or GND(either one)to disable power li

47、mit function.PBTL(Mono)Function YD1502 provides the application of parallel BTL operation with two outputs of each channel connected directly.If the PBTL pin is tied high,the positive and negative outputs of left and right channel are synchronized and in phase.Apply the input signal to the RIGHT cha

48、nnel input in PBTL mode and let the LEFT channel input grounded,and place the speaker between the LEFT and RIGHT outputs.The output current capability is doubled of that in normal mode.See the application circuit example for PBTL(Mono)mode operation.For normal BTL(Stereo)operation,connect the PBTL p

49、in to ground.Dynamic Temperature Control(DTC)The DTC function is designed to protect the loudspeaker from over heating.As the junction temperature is higher than OT_W,the gain of amplifier will decrease step by step every 0.25s.Finally,as the junction temperature is lower than OT_R,the attenuated ga

50、in steps will be released step by step every 0.5s.If DTC cant suppress the temperature and the temperature reach to the OT trip point(170oC),the amplifier will be shutdown.The OT hysteresis temperature equals to OT_R.Typically,OT_W is 160oC and OT_R is 145oC.YD1502 2*20W D 类音频功率放大器类音频功率放大器 源达科技香港有限公