LM4668 National Semiconductor, LM4668 Datasheet
LM4668
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LM4668 Summary of contents
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... LM4668 10W High-Efficiency Mono BTL Audio Power Amplifier General Description The LM4668 is a high efficiency switching audio power amplifier primarily designed for demanding applications in flat panel monitors and TV’ capable of delivering 8Ω mono BTL load with less than 1% distortion (THD+N) from a 12V power supply ...
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Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit (* Zetex ZHCS506) www.national.com 2 20089101 ...
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... RIPPLE p-p BYPASS_1 input referred f = 50Hz f = 60Hz f = 100Hz f = 120Hz f = 1kHz C = 10µF BYPASS − T )/θ or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4668 typical application ≤ T −40˚C ≤ MAX 9V ≤ 12V 8Ω, and LM4668 ...
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... Electrical Characteristics for the LM4668 Note 8: Datasheets min/max specification limits are guaranteed by design, test, or statistical analysis. Note 9: Shutdown current is measured in a normal room environment. The SHUTDOWN pin should be driven as close as possible to GND for minimum shutdown current. Note 10: Please refer to “Under Voltage Protection” on page 8 under “General Features.” ...
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Typical Performance Characteristics Amplifier Output Power vs Power Supply Voltage R = 8Ω 1kHz L Power Rejection Ratio vs Frequency 8Ω, Input Referred DD L Power Rejection Ratio vs Frequency V = 14V, ...
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Typical Performance Characteristics Amplifier Power Dissipation vs Load Power Dissipation V = 12V 8Ω 1kHz DD L Output Power vs Load Resistance V = 14V 1kHz DD Output Power vs Load Resistance V = ...
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Typical Performance Characteristics Power Dissipation vs Ambient Temperature (Continued) 20089124 7 www.national.com ...
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... Under Voltage Protection The under voltage protection disables the output driver sec- tion of the LM4668 while the supply voltage is below 8V. This condition may occur as power is first applied or during low line conditions, changes in load resistance, or when power supply sag occurs. The under voltage protection ensures that all of the LM4668’ ...
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... MH-packaged LM4668 and associated external components. Figures 5 through 7 show the recommended two-layer PC board lay- out that is optimized for the 14-pin LD-packaged LM4668 and associated external components. These circuits are de- (2) signed for use with an external 12V supply and 8Ω speakers (or load resistors). This circuit board is easy to use. Apply 12V and ground to the board’ ...
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Demonstration Board Layout www.national.com FIGURE 2. Recommended MH PCB Layout Top Silkscreen FIGURE 3. Recommended MH PCB Layout Top Layer 10 20089103 20089104 ...
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Demonstration Board Layout (Continued) FIGURE 4. Recommended MH PCB Layout Bottom Layer FIGURE 5. Recommended LD PCB Layout Top Silkscreen Layer 11 20089105 20089125 www.national.com ...
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Demonstration Board Layout www.national.com (Continued) FIGURE 6. Recommended LD PCB Layout Top Layer FIGURE 7. Recommended LD PCB Layout Bottom Layer 12 20089126 20089127 ...
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... Physical Dimensions inches (millimeters) unless otherwise noted LD Package Order Number LM4668LD NS Package Number LDC14A 13 www.national.com ...
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... Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 MH Package Order Number LM4668MH NS Package Number MXA20A 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...