LM4682SQBD National Semiconductor, LM4682SQBD Datasheet
LM4682SQBD
Specifications of LM4682SQBD
Related parts for LM4682SQBD
LM4682SQBD Summary of contents
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... The IC features click and pop reduction circuitry that minimizes audible popping during device turn-on and turn-off. The LM4682 is available in a 48-lead LLP package, ideal for portable and desktop computer applications. Boomer® registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation Key Specifications ■ ...
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Block Diagram www.national.com Block Diagram for LM4682 2 20119622 ...
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Connection Diagram LLP Package Top View Order Number LM4682SQ See NS Package Number SQA48A (LLP Package) 3 20119618 www.national.com ...
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Typical Application www.national.com 4 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Input Voltage Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature (Note 6) Storage Temperature Soldering Information LLP Package ...
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Symbol Parameter Headphone Amplifiers Power Out Per Channel P O THD+N Distortion + Noise V Output Noise Voltage, RMS NOISE Power Supply Rejection Ratio PSRR (Referred to Input) Electrical Characteristics for Volume Control The following specifications apply for V Symbol ...
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Typical Performance Characteristics (Power Amplifier) THD+N vs Frequency = 8Ω 9V THD+N vs Frequency = 8Ω 15V THD+N vs Output Power Per Channel V = 12V ...
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THD+N vs Output Power Per Channel V = 12V 10kHz Output Power vs Supply Voltage f = 1kHz Amplifiers Gain vs Frequency = 8Ω 12V www.national.com = ...
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PSRR vs Frequency PSRR vs Frequency V = 15V DD Class-D Amplifier Dissipation vs Load Dissipation Per Channel 12V (both channels driven and measured) 20119644 Class-D Amplifier Dissipation vs Load Dissipation ...
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Efficiency vs Output Power (both channels driven and measured) Efficiency vs Output Power V = 15V (both channels driven and measured) Output Power vs Load Resistance V = 12V ...
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Power Supply Current vs Power Supply Voltage Typical Performance Characteristics (Headphone Amplifier) THD+N vs Frequency = 32Ω 9V THD+N vs Frequency = 32Ω 15V 20119654 = ...
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THD+N vs Output Power = 32Ω 12V Output Power vs Supply Voltage Per Channel f = 1kHz Headphone Amplifier Gain vs Volume Control Voltage V = 15V DD www.national.com = 1kHz ...
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General Features SYSTEM FUNCTIONAL INFORMATION Modulation Technique Unlike typical Class D amplifiers that use single-ended com- parators to generate a pulse-width modulated switching waveform and RC timing circuits to set the switching frequen- cy, the LM4682 uses a balanced differential ...
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Over-Modulation Protection The LM4682’s over-modulation protection is a result of the preamplifier’s inability to produce signal magnitudes that equal the power supply voltages. Since the preamplifier’s out- put magnitude will always be less than the supply voltage, the duty cycle ...
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Voltage Range (% of VOLVDD) Low High Recommended Step 1 77.50% 100.00% 100.000% 2 75.00% 78.50% 76.875% 3 72.50% 76.25% 74.375% 4 70.00% 73.75% 71.875% 5 67.50% 71.25% 69.375% 6 65.00% 68.75% 66.875% 7 62.50% 66.25% 64.375% 8 60.00% 63.75% ...
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Application Hints SUPPLY BYPASSING The major source of noises to be taken care and applying bypassing technique in using LM4682 are those transients response coming from its output stage. During the switching operations of the output stage of LM4682, the ...
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FIGURE 2. Top Layer FIGURE 3. Top Silkscreen Layer 17 20119626 20119627 www.national.com ...
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FIGURE 4. Upper Middle Layer FIGURE 5. Lower Middle Layer 18 20119623 20119624 ...
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FIGURE 6. Bottom Layer 19 20119625 www.national.com ...
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Revision History Rev 1.0 02/22/06 1.1 02/24/06 1.2 03/08/06 1.3 06/29/06 1.4 04/09/08 1.5 04/15/08 1.6 04/21/08 www.national.com Date Initial WEB release of the document. Edited art 201196 71 (changed the y-axis unit from mA to mW. Did few texts ...
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Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM4682SQ NS Package Number SQA48A 21 www.national.com ...
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... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...