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LX1721CDBTR Datasheet(PDF) 4 Page - Microsemi Corporation |
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LX1721CDBTR Datasheet(HTML) 4 Page - Microsemi Corporation |
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4 / 14 page  Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 Copyright © 2001 Rev. 1.2a,2004-06-10 AudioMAX™ LX1721 / 1722 Class-D Stereo Power Amplifier Controller PRODUCTION I N T E GRA T ED PR ODUC T S ELECTRICAL CHA RACTERISTICS Unless otherwise specified, the following specifications apply over the operating ambient temperature -20°C < TA < 70°C (NOTE 2). Test conditions: RPWM = 34.8k, CPWM = 100pF, VDD = PVDD = 15V LX1721 / 1722 Parameter Symbol Test Conditions Min Typ Max Units Evaluation Module (See LXE1721) Supply Voltage LX1721 7 15 LX1722 VDD 7 25 V Power Supply Rejection Ratio PSRR VIN = 15V, VRIPPLE = 1VRMS, 20Hz to 20kHz -70 dB VIN = 15V, RL=4Ω, THD+N=1%, 10Hz to 22kHz 25 Output Power (Per Channel) PO VIN = 25V, RL=4Ω, THD+N=1%, 10Hz to 22kHz 60 W VIN = 15V, fIN = 1kHz, PO = 10W 82 Efficiency VIN = 15V, fIN = 1kHz, PO = 20W 85 % fIN = 1kHz, PO = 1W .06 Total Harmonic Distortion Plus Noise THD+N fIN = 20Hz to 20kHz, PO = 1W .2 % Signal-To-Noise Ratio SNR RL = 4Ω, PO = 1W 81 dBr Oscillator Section Oscillator Frequency FOSC 450 kHz Charge Current ICHG (varies with VDD pin voltage) -225 µA Discharge Current IDIS (varies with VDD pin voltage) 225 µA Oscillator Peak Voltage VPK (varies with VDD pin voltage) 3.6 V Oscillator Valley Voltage VVAL (varies with VDD pin voltage) 1.4 V Voltage Stability VDD = 8V to 25V 0.6 2 % Temperature Stability TA = 0 OC to 70OC 1.0 2 % Error Amplifier Input Offset Voltage VIO 5 ‘mV DC Open Loop Gain AOL 60 dB Unity Gain Bandwidth UGBW 7 ‘MHz High Output Voltage VOH IOUT = -100µA 3.5 V Low Output Voltage VOL IOUT = +100µA 100 ‘mV Input Bias Current IIN VIN = 1V to 4V 1 µA Input Amplifier Stage Gain Set by Internal Resistors 3.465 3.5 3.535 V/V Output Voltage, High VOH IOUT = -100µA 3.85 V Output Voltage, Low VOL IOUT = +100µA 1.3 V Input Impedance 180 ‘kΩ Feedback Amplifier Stage Gain LX1721 Set by Internal Resistors 89 91 93 ‘mV/V LX1722 Set by Internal Resistors 56 57 58 ‘mV/V Input Impedance LX1721 250 kΩ LX1722 400 kΩ |
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