4588.2 125/220 Watt Full Bandwidth Class Amplifier HCA125ACR
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HCA125ACREF
4588.2
125/220 Watt Full Bandwidth Class Amplifier
HCA125ACREF reference design delivers 125W power into load watts into load. Since efficiency greater than 90%, expensive, bulky heatsinks required. design part Intersil's Cool Audio program that supports customers achieve minimum time-to-market audio products. part this program, this design offered after execution Licensing Agreement. that time, Intersil provides licensee documentation package containing: Circuit Description, Schematics, Test Manufacturing Information, Bill Materials with vendors vendor part numbers, Intersil's Engineering Support Contacts, Evaluation Unit. more information, web, home page http://www.intersil.com. technical assistance, call Central Applications 1-800-442-7747, email centapp@intersil.com.
Features
Watts Power into Watts Power into <0.07% 1kHz 110W into 110dB Relative Full Power Output Noise, 10Hz 22kHz 110µV Constant Group Delay 80kHz Small Signal Bandwidth Power Bandwidth 28kHz Slew Rate 8V/µs Efficiency >90% 100W into Meets EN55013 Requirements Based Intersil HCA8001, Audio Specific Modular Design Differential Input Over-Current, Over-Voltage Thermal Protection Soft Clipping Bridgeable 800W
Applications
Powered Speakers Professional Audio Home Theater Hi-Fi Stereo
Ordering Information
Contact Intersil licensing agents, Continental East International Operations. contact information provided this document.
Reference Design Block Diagram
PLAYER PLAYER PRE-AMPLIFIER HCA125ACREF POWER DISTRIBUTION HCA125ACREF HCA125ACREF HCA125ACREF HCA125ACREF 76.2MM (3") 27.9MM (1.1" HCA125ACREF
172.7MM (6.8"
HCA8001 TUNER, PRE-AMPLIFIER DOLBYDIGITAL DECODER DISPLAY DRIVERS
POWER SUPPLY
HEATSINK SHIELD FETS DIODES HCA8001
CAUTION: These devices sensitive electrostatic discharge; follow proper Handling Procedures. Coolaudiois trademark Intersil Corporation. Dolbyis registered trademark Dolby Laboratories, Inc. http://www.intersil.com 407-727-9207 Copyright Intersil Corporation 1999
HCA125ACREF
Absolute Maximum Ratings
Voltage, VBUS ±70V Audio Inputs Differential Peak Peak Voltage Bias Supply, 12VFLT Floating .15V
Operating Conditions
Voltage, VBUS ±60V Ambient Temperature Range 50oC
CAUTION: Stresses above those listed "Absolute Maximum Ratings" cause permanent damage device. This stress only rating operation device these other conditions above those indicated operational sections this specification implied.
Electrical Specifications
RLOAD VBUS Supply Source Resistance 2.5, Storage Capacitor 22,000µF, 12VFLT Floating Bias Supply 25oC
PARAMETER SUPPLY SPECIFICATION Minimum Voltage ±VBUS Current ±VBUS Current Average Current Floating Bias Supply Current Rising Under Voltage Lock Voltage Falling Under Voltage Lock Voltage ENABLE Threshold Voltage ENABLE Threshold Voltage ENABLE Internal Source Current OUTPUT POWER EFFICIENCY Maximum Output Power (Note Maximum Output Power (Note Maximum Output Power (Note Maximum Output Power (Note Efficiency
SYMBOL
TEST CONDITIONS
UNITS
BIAS Rising Falling VENABLE1 VENABLE2 ENABLE
Full Output Power 1kHz Sine Wave, Full Output Power Load) 1kHz Sine Wave, Full Output Power Load) Idle Current, Signal Current supplied power output gate driver circuitry. voltage that activates amplifier. voltage that shuts down amplifier. Amplifier starts this voltage, input amplifier muted. Input amplifiers active entire amplifier active. Internal "Pull Current
PMAX8 10%THD8 PMAX4 10%THD4 PMAXEFF PMAXEFF PMAXEFF PMAXEFF
1kHz, RLOAD 10%, 1kHz, RLOAD 1kHz, RLOAD 10%, 1kHz, RLOAD POUT POUT POUT POUT 100W
AMPLIFIER PERFORMANCE Total Harmonic Distortion Noise Signal Noise Ratio Output Noise Intermodulation Distortion PSRR (VOUT /VBUS) PSRR (VOUT /VBUS) Amplifier Output Offset Voltage Amplifier Output Impedance Damping Factor ADDITIONAL CHARACTERISTICS Cutoff Frequency, Referenced 1kHz FUPPER8 -3dB, RLOAD Output
THD+N
POUT 100W, RLOAD 1kHz Relative full scale output, 125W into 10Hz 22kHz SMPTE, 60Hz 7kHz, 4:1, RLOAD Output 120Hz voltage across speaker, load Measured 1kHz Output Measured 1kHz Output
0.05 0.03
µV/V
VSNR PSRR PSRRac |VOS| ZOUT
HCA125ACREF
Electrical Specifications
RLOAD VBUS Supply Source Resistance 2.5, Storage Capacitor 22,000µF, 12VFLT Floating Bias Supply (Continued) 25oC PARAMETER Cutoff Frequency, Referenced 1kHz 20kHz Response, Referenced 1kHz Power Bandwidth Slew Rate Maximum Switching Ripple Output Input Gain Input Impedance, Inverting Input Input Impedance, Inverting Input Output Signal Phasing Over Temperature Shut Down Over Temperature Hysteresis Amplifier Output Current Limit Amplifier Output Current Limit Time (Note NOTES: this power level, soft clipping circuitry beginning activate. functions "round off" peaks rather than hard limit most linear amplifiers. This helps give this amplifier pleasing sound during limiting. Moreover, this feature also makes amplifier "sound louder". This time allows amplifier reproduce large, sustained peaks without shutting down, adequate protect amplifier output from shorted speaker lines.
SYMBOL FUPPER4 20kHz FPWM RINRIN+ Phasing OTSD
TEST CONDITIONS -3dB, RLOAD Output Output 20kHz 10W, RLOAD Maximum Frequency Full Power RLOAD Maximum rate change output voltage. Full Output Power, RLOAD Either inverting inverting input. Unused input returned analog ground. Differential amplifier input, other input grounded. Differential amplifier input, other input grounded. Positive going signal inverting input results negative going amplifier output. Rising temperature shutdown amplifier. external thermistor. Difference between rising falling temperature shut down start points. Absolute Value Time amplifier must current limiting before shutdown.
-0.4
UNITS V/µs Degrees
12VFLT SIDE SOLDER POST SIDE BOARD CONNECTOR BOTTOM SIDE
FIGURE BOARD CONNECTOR SHOWN FROM BACK SIDE, LOOKING TOWARD HCA125ACREF BOARD
HCA125ACREF
TABLE HCA125ACREF BOARD TERMINAL DESIGNATIONS TERMINAL DESIGNATION Analog Ground Ground Input Ground Analog Ground Ground Input Ground Analog Ground Ground ENABLE Ground Ground Ground Ground Ground SFCL 12VFLT Ground Ground Ground Ground Ground Ground FUNCTION Input Ground Power Ground Signal Input Power Ground Input Ground Power Ground Signal Input Power Ground Input Ground Power Ground Chip Enable Power Ground Driver Signal Power Ground Pos. Supply Power Ground Pos. Supply Power Ground Pos. Supply Power Ground Pos. Supply Drive Signal Pos. Supply Drive Signal Floating Supply Power Ground Neg. Supply Power Ground Neg. Supply Power Ground Neg. Supply Power Ground Neg. Supply Power Ground Neg. Supply Power Ground
NOTE: terminals indicate phasing input operational amplifier signal phasing amplifier input output. signal from amplifier input degrees phase with this nomenclature. Therefore, positive going signal input will result negative going signal output. Conversely, positive going input input will result positive going output signal.
HCA125ACREF Typical Performance Curves
N(%) FREQUENCY LOAD AMPLIFIER OUTPUT (dBr) N(%) 100W LOAD LOAD -1.0 -2.0 -3.0 -4.0 -5.0 -6.0 FREQUENCY (Hz) FREQUENCY (Hz) AMPLIFIER RESPONSE (dBr) FREQUENCY WATTS
0.01
0.001 0.0005
FIGURE N(%) FREQUENCY LOAD
FIGURE AMPLIFIER FREQUENCY RESPONSE LOAD
52.0
AMPLIFIER OUTPUT INPUT LOAD 45.5 OUTPUT VOLTAGE (VRMS) 39.0 32.5
84.5 47.5 21.5
OUTPUT POWER (WRMS)
602A DIGITIZING SIGNAL ANALYZER
26.0 19.5 13.0
INPUT VOLTAGE (VRMS)
100V/DIV
1ms/DIV
FIGURE AMPLIFIER TRANSFER CHARACTERISTIC WITH VARIOUS SETTINGS SOFT CLIPPING RESISTOR
FIGURE OSCILLOSCOPE DISPLAY AMPLIFIER OUTPUT WITH SOFT CLIPPING CIRCUIT ENABLED
Soft Clipping
Figures show effects soft clipping circuitry within amplifier. Figure shows transfer characteristic amplifier various values soft clipping programming resistor. important aspect soft clipping apparent increase sound level. soft clipping reached, upper lower envelope sinewave gradually reduced. "soft" clipping rounding reduces higher harmonics that would result hard clipping shown Figure enabled. Soft clipping also results amplifier with more pleasing sound. Figure shows rounding output with soft clipping, while Figure shows amplifier output without soft clipping.
602A DIGITIZING SIGNAL ANALYZER
100V/div
1ms/DIV
FIGURE OSCILLOSCOPE DISPLAY AMPLIFIER OUTPUT WITH SOFT CLIPPING CIRCUIT DISABLED
HCA125ACREF Full Size Outline HCA125ACREF Board
VIEW
BOARD CONNECTIONS SHOWN FROM COMPONENT SIDE BOTTOM SIDE SIDE
12VFLT
CONNECTOR 530843-3 CINCH 50-18SN-12 CONTACTS THESE CONNECTORS HAVE GOLD INTERFACE
VIEW
OUT76.2MM
OUT+
172.7MM (6.8"
NOTE: terminals indicate phasing input operational amplifier signal phasing amplifier input output. signal from amplifier input degrees phase with this nomenclature. Therefore, positive going signal input will result negative going signal output. Conversely, positive going input input will result positive going output signal
HCA125ACREF Schematic Diagram HCA125ACREF Board Test Setup
OUTPUT HCA125ACREF OUT- OUT+
ANALYZER AUDIO GENERATOR DISTORTION ANALYZER INPUT
AMPLIFIER LOAD RESISTOR
12VFLT SIDE POST SIDE BOARD CONNECTOR BOTTOM SIDE
MAKE SURE SUPPLY STABLE WITH CAPACITORS 10,000µF
-60V
+60V
10,000µF
EARTH
CAUTION: Remove POWER when INSERTING REMOVING AMPLIFIER board. MAKE SURE POWER SUPPLY CAPACITORS DISCHARGED DAMAGE AMPLIFIER RESULT.
Board Test Equipment Test Procedure Intersil HCA125ACREF Amplifier
Equipment required evaluation Intersil HCA125ACREF Amplifier follows: 60V, Power Supplies Please read next section, Test Procedure Evaluation HCA125ACREF, Item 12V, 200mA Power Supply. Distortion Analyzer such Audio Precision System System equivalent. Load resistors, 200W 350W. Associated connectors cables. HCA125ACREF Amplifier Board.
supplies ±60V this point). safety, turn supplies before connecting capacitors. important note that many linear power supplies function properly with peak current demands these amplifiers frequencies. This reason 10,000µF capacitors applied across supplies. also important make sure supplies stable with these capacitors. strong indicator inadequate supply capacity rising distortion frequencies. amplifier distortion does increase frequency. Transformer supplies with 10,000µF capacitors, single amplifier, most stable, providing transformer provide required current. Depending type testing conducted (Output Power, Frequency Response, THD, etc.) select menu control panel settings Audio Precision Analyzer other distortion analyzer conduct test. Input frequency should between 20Hz 20kHz input voltage level should increased until desired output power achieved. Conduct desired tests accordance with Audio Precision other analyzer test procedures. Power levels 10W, 20W, 100W should selected. Power down audio signal input turn ±60V power supplies before turning floating supply.
Test Procedure Evaluation HCA125ACREF
With audio input signal, ±60V supplies current limit 10,000µF capacitors connected, turn amplifier floating power supply first. Next turn both supplies. supply current with input signal should approximately 30mA. floating supply current should about 120mA. After verifying that supply current normal, increase current limit setting ±60V supplies connect 10,000µF capacitors (the actual amplifier current draw should remain constant with
HCA125ACREF Block Diagram HCA125ACREF Test Setup
AUDIO PRECISION OTHER DISTORTION ANALYZER AUDIO PRECISION UNBALANCED GROUNDED LOAD RESISTOR
SIDE
CAUTION: Remove POWER when INSERTING REMOVING AMPLIFIER board. MAKE SURE POWER SUPPLY CAPACITORS DISCHARGED DAMAGE AMPLIFIER RESULT.
+BUS 12VFLT -BUS
+12V
200mA
2224
NOTE: DIFFERENTIAL INPUT. INPUT SIGNAL INPUT INPUT RETURNED ANALOG GROUND. WHEN USING INPUT, RETURN INPUT ANALOG GROUND. ENABLE LEFT OPEN SINCE 25µA PULL CURRENT WILL ENABLE FAN, SFCL ALSO LEFT OPEN. MUST CONNECTED EARTH GROUND CONNECTION POWER SUPPLY.
10,000µF 100V
10,000µF 100V
MAKE SURE SUPPLY STABLE WITH CAPACITORS
NOTE: +60V -60V supplies must capable supplying peak currents 13A.
HCA125ACREF Amplifier Test Board Interface Connector
INTERFACE BOARD COMPONENTS
AUDIO ENABLE +BUS 12VFLT -BUS
COMPONENT
VALUE 200, 0.25W 200, 0.25W 13K, 0.25W 13K, 0.25W 0.1µF, 50V, Populated 12V, 0.25W Connector Connector
FOOTPRINT 1206 1206 1206 1206 1206 1206 1206 1206 1206 1206
LED1 LED2
+BUS
LED1
LED2 SFCL
SCHEMATIC DIAGRAM INTERFACE BOARD BOARD CONNECTIONS AUDIO INPUT FUNCTION Inverting Non-Inverting Open Open Open Open
above tables show method connecting amplifier audio input interface board connector, either positive negative input amplifier board. Note components need populated. example, only resistors used connection input amplifier. LEDs used, then zener diode associated resistors needed. output available optional controller. Holding ENABLE terminal sinking internal 25µA pull current ground will disable amplifier output stage. Removing this ground shunt will restore normal amplifier operation. Both ENABLE terminals left open.
R3D2 R1R2 +BUS HCA125ACREF CONNECTOR BOARD AGND -BUS -BUS ENABLE
LED1 Intersil Corporation
LED2
Shown Silk Screen Component side looking towards amplifier module.
NOTE: parts populated. 12VFLT Supply. Refer tables components options.
NOTE: terminals indicate phasing input operational amplifier signal phasing amplifier input output. signal from amplifier input degrees phase with this nomenclature. Therefore, positive going signal input will result negative going signal output. Conversely, positive going input input will result positive going output signal
HCA125ACREF Authorized Intersil Licensing Agents
Asia
Continental East, Inc. 3-1-5 Azabudai, Minato-ku Tokyo 106, Japan Tel: 03-3584-0339 FAX: 03-3588-0930
North America Europe
International Operations, Inc. Oakdale Manor Suffern, York 10901 Tel: 914-369-3532 FAX: 914-369-1607
Intersil semiconductor products manufactured, assembled tested under ISO9000 quality systems certification.
Intersil semiconductor products sold description only. Intersil Corporation reserves right make changes circuit design and/or specifications time without notice. Accordingly, reader cautioned verify that data sheets current before placing orders. Information furnished Intersil believed accurate reliable. However, responsibility assumed Intersil subsidiaries use; infringements patents other rights third parties which result from use. license granted implication otherwise under patent patent rights Intersil subsidiaries.
information regarding Intersil Corporation products, site http://www.intersil.com
Sales Office Headquarters
NORTH AMERICA Intersil Corporation 883, Mail Stop 53-204 Melbourne, 32902 TEL: (407) 724-7000 FAX: (407) 724-7240 EUROPE Intersil Mercure Center 100, Fusee 1130 Brussels, Belgium TEL: (32) 2.724.2111 FAX: (32) 2.724.22.05 ASIA Intersil (Taiwan) Ltd. 7F-6, Hsing North Road Taipei, Taiwan Republic China TEL: (886) 2716 9310 FAX: (886) 2715 3029
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