LM4830 National Semiconductor, LM4830 Datasheet
LM4830
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LM4830 Summary of contents
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... LM4830 Two-Way Audio Amplification System with Volume Control General Description The LM4830 is an integrated solution for two-way audio am- plification. It contains a bridge-connected audio power ampli- fier capable of delivering 1W of continuous average power load with less than 1% THD from a 5V power supply. ...
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Typical Application www.national.com FIGURE 1. Typical Application Circuit 2 DS012677-1 ...
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... A VCL IN = − mW kHz VCL (Refer to Figure 220˚C −40˚C T 85˚C A 2.7V V 5.5V DD 32˚C/W 79˚C/W 21˚C/W 61˚C/W = 25˚C. A LM4830 Units (Limits) Typical Limit (Note 6) (Note 7) 5.8 mA (min) 11.0 20.0 mA (max) 11.4 mA 7.9 mA 0.5 2.0 µA (max) 0.7 50.0 mV (max) 30 µV 16 µV 1.15 1.0 W (min) 1 ...
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... IHF-A Weighting Filter mW kHz 1W kHz Power Amp JMAX )/ or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4830M resistor 25˚C. A LM4830 Units (Limits) Typical Limit (Note 6) (Note 7) −72 ...
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Computer Application Circuit FIGURE 2. 5 DS012677-4 www.national.com ...
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Typical Performance Characteristics Output Power vs Supply Voltage DS012677-5 Output Power vs Supply Voltage DS012677-8 THD + N vs Output Power DS012677-11 THD + N vs Output Power DS012677-14 www.national.com (Power Amp-Bridged) Wideband Noise Floor DS012677-6 Output Power vs Supply ...
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Typical Performance Characteristics THD + N vs Output Power DS012677-17 THD + N vs Output Power DS012677-20 THD + N vs Output Power DS012677-23 THD + N vs Output Power DS012677-26 (Power Amp-Bridged) (Continued) THD + N vs Output Power ...
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Typical Performance Characteristics THD + N vs Output Power DS012677-29 Wideband Noise Floor DS012677-32 Output Attenuation in Shutdown Mode DS012677-35 Supply Current vs Supply Voltage DS012677-38 www.national.com (Power Amp-Bridged) (Continued) Power Amp Crosstalk to Preamp and Buffer DS012677-30 Wideband Noise ...
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... If each of the amplifiers in the LM4830 were of the same power level, each of their power dissipations would need to be taken into account. However, this is not the case and the bridged power amplifier is the only major power dis- sipation contributor ...
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... NC COMPUTER APPLICATION CIRCUIT The LM4830 can also be used to drive both an internal sys- tem speaker and stereo headphones simultaneously, as shown in Figure 2 . The internally configured unity-gain buffer requires the preamp to also be set inverting unity-gain fashion to maintain proper signal phase between channels for the stereo headphone amplifier ...
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... When the switch is closed, the shut- down pin is connected to ground and enables the amplifier. If the switch is open, the external pull-up resistor disables the LM4830 by bringing the shutdown pin scheme guarantees that the shutdown pin will not float, pre- venting unwanted state changes. ...
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... Physical Dimensions inches (millimeters) unless otherwise noted 24-Lead (0.300" Wide) Molded Small Outline Package, JEDEC 24-Lead (0.600" Wide) Molded Dual-In-Line Package Order Number LM4830M NS Package Number M24B Order Number LM4830N NS Package Number N24A 13 www.national.com ...
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... National Semiconductor Asia Pacific Customer Fax: +49 (0) 1 80-530 85 86 Response Group Email: europe.support@nsc.com Tel: 65-2544466 Fax: 65-2504466 Tel: +49 (0) 1 80-532 78 32 Email: sea.support@nsc.com Tel: +49 (0) 1 80-534 16 80 National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 ...