ICEpower125ASX2 Datasheet 1 1
DATASHEETICEpower125ASX2Page 1 of 29Version 1.1ICEpower 125ASX22x125W or 1x500W ICEpower Amplifierwith integrated ICEpower SupplyContentsGeneral Description. 2Block Diagram . 3Connection Diagram . 3Absolute Maximum Ratings. 5Power Specifications . 7General Audio Specifications (SE-mode) . 7General Audio Specifications (BTL-mode).8Electrical Specifications .9Timing Specifications .9Disturbances on the Mains .9Mechanical Specifications .9Typical Performance Characteristics . 10Power vs. Frequency. 15Output Impedance . 15Loading . 15Dissipated Power vs. Output Power . 16Features . 18Protection Features . 20Power Supply Protection . 20Amplifier Local Protection . 21Amplifier Global Protection . 21Input/Output Interface. 22BTL module setup . 23Output stage . 23Operational Timing Diagram . 24Thermal Design . 24
DATASHEETICEpower125ASX2Page 2 of 29Version 1.1Physical Dimensions . 25Drill Pattern . 27Safety Standards. 28ESD Warning . 28Packaging and Storing . 28Notes . 29General DescriptionThe ICEpower125ASX2 is fully integrated, intelligent audio power conversion solution designed particularly for highly competitive consumer and professional audio products. The ICEpower125ASX2 is EMC and safety approved and the “black-box”completeness allows for fast design-in and minimized time to market. Key benefits include: State-of-the-art, high efficiency ICEpower amplification stagebased on the patented HCOM modulation and MECC controltechniques An ICEpower Supply with selectable mains converter and separate aux converter. A wide set of features for plug-and play implementation into applications such as active speakers and subwoofers, wirelessspeakers, multimedia audio, musical instrument amplifiers anddistributed audio.The ICEpower125ASX2 can be configured to either stereo or mono output. Combined with the auxiliary supply for powering external circuitryand the complete elimination of external heat sinks and EMI shields; theICEpower125ASX2 is the natural choice in any audio application that requires a compact, integrated power solution.The ICEpower125ASX2 is protected against short circuits, overload and over heating and includes on-board fuses and EMI filtering to provide a CE and FCC pre-approved design.Key SpecificationsKey Features 450W @ 1% THD N, 20Hz – 20kHz, 4Ω, BTL2 x 120W @ 1% THD N, 20Hz – 20kHz, 4Ω, SE(both channels driven)121dBA dynamic range (BTL-mode)117dBA dynamic range (SE-mode)THD N 0.002% @ 1W (8Ω,1kHz, SE-mode)THD N 0.002% @ 1W (8Ω,1kHz, BTL-mode)86,4 % total efficiency @ 250W, 8ΩCCIF Intermodulation distortion 0.0009%, 10W,4Ω, 18.5kHz/1kHz 25V unregulated auxiliary power supplySelectable Mains 85-132VAC & 170-264VAC Fully integrated audio power solutionRugged constructionThermal protectionOver current protectionSound optimized soft clippingSuitable for CE approved designsEMI conforms to: EN55013EN55020EN61000-3-2EN61000-3-3FCC part 15-BSafety conforms to: IEC 60065 7th ed.UL 60065 7th ed.
DATASHEETICEpower125ASX2Page 3 of 29Version 1.1Block DiagramFigure 1: ICEpower125ASX2 block diagramConnection DiagramFigure 2: ICEpower125ASX2 connections
DATASHEETICEpower125ASX2Page 4 of 29Version 1.1The connector interface of the ICEpower125ASX2 module has four industry standard connectors selected for long term reliability.AC Header Specifications (P100)Type: JST B2P3-VHPINFunctionDescriptionType1LiveLive ACInput2NeutralNeutral ACInputTable 1: AC connector specifications.Speaker Header Specifications (P101)Type: JST B4P-VHPINFunctionDescriptionType1Vo Amplifier output channel 2Output2GNDGNDchannel2GND2GNDGNDchannel1GND4Vo Amplifier output channel 1OutputTable 2: Speaker connector specifications.Signal Header Specifications (P102)Type: JST B8B-PH-K-SPINFunctionDescriptionType1BTL SyncSynchronization pin for amplifiers (used in BTL-mode)Input2EnableAmplifier enableInput/Output3OCMonitor pin amplifier over currentOutput4ThermalThermal monitoring pinOutput5Vin channel 2Input signal channel 2Input6GNDGround terminal for the signal section.GND7GNDGround terminal for the signal section.GND8Vin channel 1Input signal channel 1InputTable 3: Signal connector specifications.Auxiliary Supply Header Specifications (P103)Type: JST B3B-PH-K-SPINFunctionDescriptionType1VdauxPositive unregulated auxiliary supply (typical 24V)Output2GNDGround terminal for the auxiliary section.GND3VsauxNegative unregulated auxiliary supply (typical -24V)OutputTable 4: Auxiliary supply header specifications.
DATASHEETICEpower125ASX2Page 5 of 29Version 1.1Absolute Maximum RatingsAbsolute maximum ratings indicate limits above which damage may occur.Mains Input Section115V mains settingSymbolParameterValueUnitsACmaxMaximum off-line voltage132VAC1)ACminMinimum off-line voltage85VACFMains frequency range 85VAC - 132VAC45 – 65HzTable 6: Absolute maximum ratings, mains input section - 115V setting.230V mains settingSymbolParameterValueUnitsACmaxMaximum off-line voltage264VAC1)ACminMinimum off-line voltage170FMains frequency range 170VAC - 264VAC45 – 65VACHzTable 7: Absolute maximum ratings, mains input section - 230V setting.2) The ICEpower125ASX2 will operate at lower levels but the output power will be reduced. If the off-line voltage is too low the ICEpower125ASX2 will switch off.Auxiliary SupplySymbolIVdIVsParameter2)Maximum current draw from Vd ( 24V)2)Maximum current draw from Vs (-24V)ValueUnit250mA-250mATable 8: Absolute maximum ratings, auxiliary supply.2) If the auxillary supply on the ICEpower125ASX2 is used with a capacitive load please remember to read the section “Capacitive Loading ofthe AUX Supply” in the ICEpower125ASX2 Designer’s Manual.Input SectionSymbolParameterValueUnitVin channel 1 ,Vin channel 2Maximum voltage range on pin 3.3VpTable 9: Absolute maximum ratings, input section.
DATASHEETICEpower125ASX2Page 6 of 29Version 1.1Output SectionSymbolParameterRloadMinimum symmetric load (SE-mode)Minimum asymmetric load (SE-mode) *Minimum load (BTL-mode)Iout3)Maximum current draw from amplifier outputCLMaximal purely capacitive load (SE)Maximal purely capacitive load (BTL)Table 10: Absolute maximum ratings, output section.ValueUnits32&6330ΩΩΩA390220nFnF*) The amplifier can be loaded asymmetrically. One channel can be loaded with minimum 2Ω. The other channel must then be minimum 6Ω3) The over current protection will act to protect the amplifier. (See ”Protection features”)Thermal SectionSymbolParameterTaMax. operating ambient temperature(tropical conditions)Table 11: Absolute maximum ratings, thermal section.Value50UnitOC
DATASHEETICEpower125ASX2Page 7 of 29Version 1.1Power SpecificationsUnless otherwise specified. Ta 25 OC, f 1kHz, RL 4Ω, 230V mainsSymboltPmaxParameterConditions4)Time of maximum rated output power4)MinTypMaxUnits400W out. No preheating.-80-sOPTContinuous output power withoutthermal shutdown. (SE, 4Ω)Thermal stab. @ Ta 25 C.Both channels driven-65-WPTContinuous output power4) withoutthermal shutdown. (SE, 8Ω)Thermal stab. @ Ta 25 OC.Both channels driven-70-WPTContinuous output power4) withoutthermal shutdown. (BTL, 4Ω)Thermal stab. @ Ta 25 OC.-70-WPTContinuous output power4) withoutthermal shutdown. (BTL, 8Ω)Thermal stab. @ Ta 25 OC.-200-WPSMPSQuiescent power consumption(amplifier disabled)Enable pin low-6-WPqQuiescent power consumption(amplifier enabled)Po 0W-9,5-WηTotal power efficiencyPo 100W 4 ohmPo 400W 4 ohmPo 500W 4 ohmPo 250W 8 ohm-7580,481,486,4-%Vdaux,VsauxNominal DC voltageMains voltage and outputpower within specified ranges 17,5 24 28VTable 12: Power specifications.4) The module is mounted vertically in free air.General Audio Specifications (SE-mode)Unless otherwise specified, f 1kHz, PO 1W, Ta 25 OC.SymbolParameterConditionsPOOutput power @ 1%THD N20Hz f 20kHz, both channels driven.(AES17 measurement filter) 6)RL 4Ω230Vac / 50Hz,115Vac / 50Hz-120105-WOutput power @ 10%THD N20Hz f 20kHz, both channels driven.(AES17 measurement filter) 6)RL 4Ω230Vac / 50Hz,115Vac /50Hz-150130-WOutput power @ 1%THD N20Hz f 20kHz, one channel driven.(AES17 measurement filter) 6)RL 4Ω230Vac / 50Hz,115Vac / 50Hz-130120-WTHD NTHD N (4Ω,AES17 measurement filter) 6)f 100Hz, PO 1W-0.0030.01VN,OOutput referenced idle noiseA-weighted203080μVAVNominal Voltage Gainf 1 kHz24,324,825,3dBfFrequency response20Hz - 20kHz, All loads- 0.15 0.5dBPOPOMinTypMaxUnits%
DATASHEETICEpower125ASX2Page 8 of 29Version 1.1fuUpper bandwidth limit (SE)(-3dB)RL 8ΩflLower bandwidth limit (-3dB)ZoAbs. output impedanceZLLoad impedance rangeDDynamic rangeA-weighted (125W, 4Ω)-117-dBIMDIntermodulation (CCIF)f 18.5kHz, 1kHz, PO 10W-0.0009-%TIMTransient intermodulation (DIM30)PO 10W-0.007-%-12090-kHzkHzRL All loads-1.5-Hzf 1kHz-18254 RL 4Ω3*mΩΩTable 13: General audio specifications.*) The amplifier can be loaded asymmetrically. One channel can be loaded with minimum 2Ω. The other channel must then be minimum 6Ω6) An Audio Precision AES17 20 kHz 7th order measurement filter is used for measurements. The frequency 6.67 kHz corresponds to theworst-case scenario where both 2nd and 3rd harmonics are within the audio band.General Audio Specifications (BTL-mode)Unless otherwise specified, f 1kHz, PO 1W, Ta 25 OC.SymbolPOPOTHD NVN,OAVffuflZoZLDIMDTIMParameterConditionsOutput power @ 1%THD N20Hz f 20kHz(AES17 measurement filter) 6)Output power @ 10%THD N20Hz f 20kHz(AES17 measurement filter) 6)THD N in 4Ω(AES17 measurement filter) 6)Output referenced idle noiseRL 4Ω230Vac / 50Hz,115Vac / 50HzRL 4Ω230Vac / 50Hz,115Vac /50Hzf 100Hz, PO 1WNominal Voltage GainFrequency responseUpper bandwidth limit (BTL)(-3dB)Lower bandwidth limit (-3dB)Abs. output impedanceLoad impedance rangeDynamic rangeIntermodulation (CCIF)Transient intermodulation (DIM30)A-weighted20Hz f 20kHzf 1 kHz20Hz - 20kHz, All loadsRL 8ΩRL 4ΩRL All loadsf 1kHzA-weighted at 500W@4Ωf 18.5kHz, 1kHz, PO 10WPO 29,73-30,7 0.3100701.51841210.00030.00631,7 0.730 -%μVdBdBkHzkHzHzmΩΩdB%%Table 14: General audio specifications.6) An Audio Precision AES17 20 kHz 7th order measurement filter is used for measurements. The frequency 6.67 kHz corresponds to the worst-case scenariowhere both 2nd and 3rd harmonics are within the audio band.
DATASHEETICEpower125ASX2Page 9 of 29Version 1.1Electrical SpecificationsUnless otherwise specified, Ta 25 OC.SymbolParameterConditionsMinTypfoSwitching frequency channel 1Idle490540590kHzfoSwitching frequency channel 2Idle450500550kHzfoSwitching frequency BTLIdle490540590kHzfsSwitching frequency range (amplifier)Idle to full scale-590kHzfsmpsSwitching frequency (power supply)100-kHz90-MaxUnitTable 15: Electrical specifications.Timing SpecificationsSymbolParameterConditionstacdPower supply start-up delay.(nominal mains)Time from reaching ACmin to all power suppliesare good and amplifier is active.MinTyp-600MaxUnit1000msTable 16: Timing specifications.Disturbances on the MainsThe signal on the mains connection is often very noisy and large surge voltages are present. The ICEpower125ASX2 isequipped with mains filtering to suppress surges and noise.Special care and component selection has made the ICEpower125ASX2 able to withstand surges up to 8kV, to avoid damageto the ICEpower125ASX2 in case of surges caused by lightning.Mechanical SpecificationsThe ICEpower125ASX2 has passed tough mechanical tests during development to ensure high reliability.TestAccelerationAmountUnpowered tests: The unit is powered after the test to verify functionality.Random vibration2gRMS3x20minBump10g/16ms, 2-4 Hz1000 bumps in each of 6 directions7)Shock70g/12ms3 shocks in each of 6 directions7)Powered tests: The unit is tested with power applied.Sinusoidal vibrations2.5mm, 5-10Hz1g, 10-100Hz2 hours in each of 3 directions7)Random vibrations0.01g, 10-20Hz0.7gRMS –3dB/oct, 20-150Hz2 hours in each of 3 directions7)Table 17: Mechanical tests.7) 6 directions: (up, down, left, right forward and backward). 3 directions: (up and down, left and right, forward and backward)
DATASHEETICEpower125ASX2Page 10 of 29Version 1.1Typical Performance CharacteristicsFrequency Response (SE-mode) 90 30 80 28 70 26 60 24 50 22 40 30 20 20 18dBg 10 16 0 14Adeg-10 12-20-30 10-40 8-50 6-60 4-70 2-80-020501002005001k2k5k10k20k50k100k-90HzFigure 3: Frequency response in 4Ω (blue), 8Ω (green) and open load (red). Top – amplitude. Bottom – phase.Frequency Response (BTL-mode) 90 34 80 32 70 30 60 28 50 26 40 24 30 22 20 20dBg 18A 16 10 0-10 14-20 12-30 10-40 8-50 6-60 4-70 2-80-020501002005001k2k5k10k20k50k100kHzFigure 4: Frequency response in 4Ω (blue), 8Ω (green) and open load (red). Top – amplitude. Bottom – phase.-90deg
DATASHEETICEpower125ASX2Page 11 of 29Version 1.1Harmonic Distortion & Noise 1251020501000.001100m200200m500m125WTHD N vs. Po at 100Hz, 1kHz and 6.67kHz 8) (8Ω). 1000.001100m200200m500m125W102050100200W8)THD N vs. Po at 100Hz, 1kHz and 6.67kHz (8Ω), 115Vac/50Hz8)THD N vs. Po at 100Hz, 1kHz and 6.67kHz (4Ω), 115Vac/50Hz 0 500.20.10.002dBr20THD N vs. Po at 100Hz, 1kHz and 6.67kHz 8) (4Ω), 20k22kHzIdle noise (16K FFT). Residual 30μV(A).f 5kHz. Po 100mW. 4Ω loading.(Relative to 125W into 4 ohm)(Relative to 125W into 4 ohm)Figure 5: Total harmonic distortion & noise (SE).8) An Audio Precision AES17 20 kHz 7th order measurement filter is used for measurements. The frequency 6.67 kHz corresponds to the worst-casescenario where both 2nd and 3rd harmonics are within the audio band.
DATASHEETICEpower125ASX2Page 12 of 29Version 1.1Harmonic Distortion & Noise 00.0001100m600200m500m125102050100200600WW8)THD N vs. Po at 100Hz, 1kHz and 6.67kHz (8Ω). 230Vac/50Hz8)THD N vs. Po at 100Hz, 1kHz and 6.67kHz (4Ω), 000.0001100m600200m500m1258)THD N vs. Po at 100Hz, 1kHz and 6.67kHz (8Ω), 115Vac/50Hz20501002006008)THD N vs. Po at 100Hz, 1kHz and 6.67kHz (4Ω), 115Vac/50Hz 0 k-16002k4k6k8k10k12k14k16k18k20kHzIdle noise (16K FFT). Residual 35μV(A).f 5kHz. Po 100mW. 4Ω loading.(Relative to 400W into 4 ohm)(Relative to 400W into 4 ohm)Figure 6: Total harmonic distortion & noise (BTL).8) An Audio Precision AES17 20 kHz 7th order measurement filter is used for measurements. The frequency 6.67 kHz corresponds tothe worst-case scenario where both 2nd and 3rd harmonics are within the audio band.22k
DATASHEETICEpower125ASX2Page 13 of 29Version 1.1Intermodulation Distortion (CCIF & TIM) (SE-mode)10 k20k22k18k20k22kHzWCCIF IMD vs. PO, RL 4Ω, f1 18,5kHz, f2 1kHz,CCIF IMD analysis. RL 4Ω, PO 10W.IMD@10W 0.002%.10 200m500m1251020WTIM vs. output power. RL 4Ω,TIM@10W 0.004%Figure 7: Intermodulation distortion (SE)50100200400-16002k4k6k8k10k12k14k16kHzTIM FFT analysis. RL 4Ω, PO 10W.
DATASHEETICEpower125ASX2Page 14 of 29Version 1.1Intermodulation Distortion (CCIF & TIM) (BTL-mode)1 k10k12k14k16k18k20k22k18k20k22kHzWCCIF IMD vs. PO, RL 4Ω, f1 18.5kHz, f2 1kHz,CCIF IMD analysis. RL 4Ω, PO 10W.IMD@10W 0.0003%.1 m500m1251020WTIM vs. output power. RL 4Ω,TIM@10W 0.006%Figure 8: Intermodulation distortion (BTL).50100200 300-16002k4k6k8k10k12k14k16kHzTIM FFT analysis. RL 4Ω, PO 10W.
DATASHEETICEpower125ASX2Page 15 of 29Version 1.1Power vs. FrequencyThe maximum allowable short-term output power of the ICEpower125SAX2 is frequency-dependant due to the compensatingZobel network in the output stage. The short-term output power is defined as the maximum undistorted (THD N 1%) outputpower until thermal shutdown occurs. The maximum Full Power Bandwidth is 20 kHz. Above this frequency the Zobel protection circuit may briefly shut down the amplifier to protect the Zobel network from damage.Note that this limitation will never cause problems when the amplifier is fed a music signal at the input, but the limit must betaken into consideration when the amplifier is tested under laboratory conditions using sine waves or noise signals.Output ImpedanceThe output impedance is measured by feeding 1ARMS into the output of the amplifier and measuring the voltage on the output.The voltage then corresponds to the output impedance. The output impedance is measured directly on the terminals on thePCB.The figure below shows the output impedance from 100Hz – 20kHz BTL-mode (left) and for one channel in SE-mode k10k20kHzFigure 9: Measured voltage at output terminals while feeding 1ARMS into the output of the amplifier at PCB.LoadingWith its low output impedance, the ICEpower125ASX2 is designed to be unaffected by loudspeaker loading characteristics.However, care should be taken with purely capacitive loads.Traditionally amplifiers have been tested extensively in laboratories with purely capacitive loads. This was done to test theamplifier’s stability and performance but it does not relate to any normal speaker load as even electrostatic speakers do notpresent a purely capacitive load to the amplifier but include a resistive part as well. The maximum purely capacitive load allowed is 390nF per channel in SE-mode or 220nF in BTL-mode.
DATASHEETICEpower125ASX2Page 16 of 29Version 1.1Dissipated Power vs. Output PowerSE-versionMains Voltage VIN:SE-version115V/50HzLoad impedance [Ω]Idle1/8 rated power(pink noise)1/8 rated power(pink noise)Continuous outputpowerContinuous outputpowerIdle1/8 rated power(pink noise)1/8 rated power(pink noise)Continuous output powerContinuous output powerLine power [W]Output power(both channels)[W]9Mains Voltage VIN:SE-versionRated power[W]Dissipatedpower [W]94105422 x 1316860262 x 7,5114651672 x 65378701652 x 7025230V/50HzLoad impedance[Ω]Rated power[W]Line power [W]Output power(both channels)[W]9Dissipatedpower [W]94120472 x 1517870292x9114651642 x 65348701602 x 7020Table 18: Dissipated power vs. Output power (SE).
DATASHEETICEpower125ASX2Page 17 of 29Version 1.1BTL power dissipationMains Voltage VIN:BTL-versionIdle1/8 rated power (pinknoise)1/8 rated power (pinknoise)Continuous outputpowerContinuous outputpowerMains Voltage VIN:BTL-versionIdle1/8 rated power (pinknoise)1/8 rated power (pinknoise)Continuous outputpowerContinuous outputpower115V/50HzLoad impedance [Ω]Rated power[W]Line power [W]Output power[W]9Dissipatedpower ine power [W]Output power[W]230V/50HzLoad impedance [Ω]Rated power[W]9Dissipatedpower [W]944508056248250453114470977027820023420034Table 19: Dissipated power vs. Output power (BTL).
DATASHEETICEpower125ASX2Page 18 of 29Version 1.1FeaturesThe ICEpower125ASX2 has a number of useful features described below.Over Current monitor pinFigure 10 shows the internal circuit of the OC pin interface.This pin is high ( 5V) during normal operation but it is pulledlow (0V) if a short circuit is detected on the speaker outputterminals.This pin is also activated by other protection features such asZobel protection, saturation detection and DC protection onthe output. If any of these protection features are activated,the pin will be pulled low (0V). This pin is only an output.Figure 10: Over Current monitor pin interfaceThermal monitor pinFigure 11 shows the internal circuit of the thermal pin interface. This pin is high ( 5V) under normal conditions. If theamplifier temperature becomes too high the pin is pulled low(0V). This can happen if the continuous power drawn fromthe amplifier exceeds the limits listed on p. 6 and p. 7. Thispin is only an outputFigure 11: Thermal monitor pin interface.Enable pinThe enable pin can enable/disable the amplifier. If the pin isleft unconnected then the level is high ( 5V), and the amplifier is enabled. If the pin is pulled low (0V) externally, theamplifier will be disabled.The enable pin will also be pulled low by the internal protection circuitry if the amplifier temperature becomes too highor a mains under- voltage is detected. This pin is bidirectional.10k100REnableCGNDGNDGNDGNDFigure 12: Enable pin interface.
DATASHEETICEpower125ASX2Page 19 of 29Version 1.1BTL Sync pinThe BTL synchronization pin is used when the amplifier isoperated in BTL mode. When the amplifier is used in BTLmode, the BTL sync pin must be pulled low (0V). By settingthe BTL sync pin low it is ensured that the switching frequencies of the two separate amplifier channels are tiedclosely together for optimized THD performance.Figure 13: BTL sync pin interfaceAuxiliary power supplyThe auxiliary supply can be used to power an external circuitsuch as a preamplifier or an equalizer/crossover. Rememberthat this supply is unregulated.When using this AUX supply, please remember to read thesections “Shielding and Grounding of Audio Signals” and “Capacitive Loading of the Aux Supply” in the ICEpower125ASX2Designer’s Manual.NOTE:The Vd and Vs outputs are fused. Even brief overloads orshort circuits will blow the fuse!The fuse on the module is a 630mA type to keep the inrushcurrent from blowing the fuse, but the maximum currentdraw (sum of current from Vd,aux and Vc,aux) should neverexceed 500mA.Figure 14: Auxiliary supply equivalent diagram.
DATASHEETICEpower125ASX2Page 20 of 29Version 1.1Protection FeaturesThe ICEpower125ASX2 is equipped with several protection features for surviving overload withoutdamage. The block diagram below illustrates the different protection features.Figure 15: Protection schematicPower Supply ProtectionThe power supply of the ICEpower125ASX2 has 2 protection circuits; over temperature and over current.The temperature protection will be activated if the absolute temperature of the circuit is too high.This can be caused by high ambient temperature, high load (amplifier and AUX supply) for a longtime or a combination of these two parameters.The over current protection will be activated if the output current to amplifier and/or AUX exceedsthe limits. Please remember that the AUX supply is protected by a fuse which will blow if the supplyis overloaded.
Page 21 of 29DATASHEETICEpower125ASX2Version 1.1If one of these protection features is triggered, the power supply either limits its output power orshuts down. In case of a shut down the power supply will rapidly try to restart if the circuit’s temperature is acceptable.Amplifier Local ProtectionThe ICEpower125ASX2 has a local protection circuit for each of the two audio channels. This localprotection handles HF protection, DC protection and saturation detection. If one of these protectionsfeatures is activated on one channel it will only influence the channel where the error occurred.The HF protection circuit is implemented to protect the Zobel network against ultrasonic signals(greater than 20kHz). This protection circuit has a built-in time constant, so it is possible to deliver ahigh frequency, high amplitude signal for a short time.Amplifier Global ProtectionThere are two global protection features in the ICEpower125ASX2 amplifier; an over temperatureprotection and an over current protection.The over temperature protection will only occur if the PRMS is greater that the specified ContinuousOutput Power. In normal use the amplifier will not shut down if properly mounted.The over current detection circuit is included in the ICEpower chipset by detecting saturation of thecontrol system. This condition will typically be allowed for 100ms to 500ms which is enough to avoidaccidental shutdown at peak currents during high music output. The current limit is set to 30A.
Page 22 of 29DATASHEETICEpower125ASX2Version 1.1Input/Output InterfaceInput StageThe single ended input buffer has an anti-aliasing filtering and
Pmax Time of maximum rated output power 4) 400W out. No preheating. - 80 - s P T Continuous output power 4) without thermal shutdown. (SE, 4Ω) Thermal stab. @ T a 25 OC. Both channels driven - 65 - W P T Continuous output power 4) without thermal shutdown. (SE, 8Ω) Thermal stab. @ T a 25 OC. Both channels driven - 70 - W P T Continuous .
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4 Vo Amplifier output channel 1 Output Table 2: Speaker connector specifications. Signal Header Specifications (P102) Type: JST B8B-PH-K-S PIN Function Description Type 1 BTL Sync Synchronization pin for amplifiers (used in BTL-mode) Input 2 Enable Amplifier enable Input/Output 3 OC Monitor pin amplifier over current Output
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