LM4873MT National Semiconductor, LM4873MT Datasheet
LM4873MT
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LM4873MT Summary of contents
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... It also utilizes cir- cuitry to reduce “clicks and pops” during device turn-on. Note 1: An LM4873MTE-1 which has been properly mounted to the circuit board will deliver 2.1W into 4 . The other package options for the LM4873 will deliver 1.1W into 8 . See the Application Information section for LM4873MTE-1 usage information ...
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... Connection Diagram See NS Package Number MXA28A for Exposed-DAP TSSOP Connection Diagram See NS Package Number MXA20A for Exposed-DAP TSSOP www.national.com DS100993-30 Top View Order Number LM4873MTE-1 DS100993-2 Top View Order Number LM4873MT, LM4873MTE See NS Package Number MTC20 for TSSOP 2 ...
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... L LM4873MTE (Note 11) L LM4873MTE- (Note 12) L LM4873MTE (Note 12) L LM4873 THD kHz LM4873MTE- (Note 11) L LM4873MTE- (Note 12) L LM4873 THD kHz 41˚C/W (Note 5) 51˚C/W (Note 6) 90˚C/W (Note 7) 41˚ ...
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... MXA28A package whose exposed-DAP is not soldered to any copper. JA Note 11: When driving 3 loads from a 5V supply, the LM4873MTE or LM4873MTE-1 must be mounted to the circuit board and forced-air cooled (450 linear-feet per minute). Note 12: When driving 4 loads from a 5V supply, the LM4873MTE or LM4873MTE-1 must be mounted to the circuit board. ...
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Truth Table for Logic Inputs SHUTDOWN HP-IN INPUT SELECT Low Low Low Low Low High Low High High X LM4873 MODE (INPUT #) Low Bridged (1) High Bridged (2) Low Single-Ended (1) High Single-Ended (2) X Shutdown 5 www.national.com ...
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... THD+N vs Frequency DS100993-36 Note 20: These curves show the thermal dissipation ability of the LM4873MTE at different ambient temperatures given these conditions: 500LFPM + JEDEC board: The part is soldered to a 1S2P 20-lead exposed-DAP TSSOP test board with 500 linear feet per minute of forced-air flow across it ...
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... PC board through 21 8 mil vias. THD+N vs Frequency DS100993-4 7 LM4873MTE-1 THD+N vs Output Power DS100993-96 LM4873MTE-1(Note 21) Power Derating Curve DS100993-A0 THD+N vs Frequency DS100993-5 www.national.com ...
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Non-MTE Specific Characteristics THD+N vs Output Power DS100993-6 THD+N vs Output Power DS100993-87 THD+N vs Frequency DS100993-88 Output Power vs Supply Voltage DS100993-9 www.national.com (Continued) THD+N vs Output Power DS100993-7 THD+N vs Frequency DS100993-89 Output Power vs Load Resistance DS100993-84 ...
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Non-MTE Specific Characteristics Output Power vs Load Resistance DS100993-12 Dropout Voltage vs Supply Voltage DS100993-15 Noise Floor DS100993-18 (Continued) Output Power vs Load Resistance DS100993-13 Power Derating Curve DS100993-16 Channel Separation DS100993-19 9 Power Dissipation vs Output Power DS100993-14 Power ...
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... With low impedance loads, the output power at the loads is heavily dependent on trace resistance from the output pins of the LM4873. Traces from the output of the LM4873MTE to the load or load connectors should be as wide as practical. Any resistance in the output traces will reduce the power de- ...
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Application Information livered to the load. For example, with a 4 trace resistance in each output, output power at the load drops from 2.1W to 2.0W Output power is also dependent on supply regulation. To keep the supply voltage from ...
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Application Information sistor will disable the LM4873. This scheme guarantees that the shutdown pin will not float, thus preventing unwanted state changes. HP-IN FUNCTION The LM4873 possesses a headphone control pin that turns off the amplifiers which drive +OutA and ...
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Application Information CLICK AND POP CIRCUITRY The LM4873 contains circuitry to minimize turn-on transients or “clicks and pops”. In this case, turn-on refers to either power supply turn-on or the device coming out of shutdown mode. When the device is ...
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... LM4873 can still be used without running into bandwidth problems. DEMOBOARD CIRCUIT LAYOUT The demoboard circuit layout is provided here as an ex- ample of a circuit using the LM4873 LM4873MTE is 1 Wrms used with this layout, the exposed-DAP is soldered down to 8 the copper pad beneath the part. Heat is conducted away ...
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Application Information Solder-side Copper Layers (Continued) DS100993-92 15 www.national.com ...
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... Physical Dimensions 20-Lead MOLDED PKG, TSSOP, JEDEC, 4.4mm BODY WIDTH www.national.com inches (millimeters) unless otherwise noted Order Number LM4873MT NS Package Number MTC20 16 ...
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... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead MOLDED TSSOP, EXPOSED PAD, 6.5x4.4x0.9mm Order Number LM4873MTE NS Package Number MXA20A 17 www.national.com ...
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... Physical Dimensions 28-Lead MOLDED TSSOP, EXPOSED PAD, 9.7x4.4x0.9mm www.national.com inches (millimeters) unless otherwise noted (Continued) Order Number LM4873MTE-1 NS Package Number MXA28A 18 ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...