lm4843mh National Semiconductor Corporation, lm4843mh Datasheet
lm4843mh
Available stocks
Related parts for lm4843mh
lm4843mh Summary of contents
Page 1
... Note 1: When properly mounted to the circuit board, the LM4843MH will deliver 2W into 4Ω. See the Application Information section for LM4843MH usage information. Note 2: LM4843MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3Ω. Block Diagram Boomer is a registered trademark of NationalSemiconductor Corporation ...
Page 2
... Connection Diagram www.national.com Standard LM4843MH 20038387 Top View Order Number LM4843MH See NS Package Number MXA20 2 ...
Page 3
Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power Dissipation ESD Susceptibility (Note 12) ESD Susceptibility (Note 13) Junction Temperature Soldering ...
Page 4
... Note 7: All voltages are measured with respect to the ground pins, unless otherwise specified. All specifications are tested using the typical application as shown in Figure 1. Note 8: When driving 3Ω loads from a 5V supply the LM4843MH must be mounted to the circuit board and forced-air cooled. Note 9: When driving 4Ω loads from a 5V supply the LM4843MH must be mounted to the circuit board. ...
Page 5
Typical Application FIGURE 2. Typical Application Circuit 5 20038388 www.national.com ...
Page 6
... Typical Performance Characteristics LM4843MH THD+N vs Output Power THD+N vs Output Power THD+N vs Output Power www.national.com THD+N vs Output Power 20038370 THD+N vs Output Power 20038324 THD+N vs Output Power(Note 17) 20038329 6 LM4843MH 20038372 20038325 20038330 ...
Page 7
... Typical Performance Characteristics THD+N vs Output Power LM4843MH THD+N vs Frequency THD+N vs Frequency (Continued) THD+N vs Frequency 20038331 THD+N vs Frequency 20038373 THD+N vs Frequency 20038358 7 LM4843MH 20038371 20038357 20038317 www.national.com ...
Page 8
Typical Performance Characteristics THD+N vs Frequency Output Power vs Load Resistance Power Supply Rejection Ratio www.national.com (Continued) THD+N vs Frequency 20038318 20038362 20038339 8 20038319 Output Power vs Load Resistance 20038307 Dropout Voltage 20038353 ...
Page 9
... Typical Performance Characteristics Volume Control Characteristics Crosstalk Supply Current vs Supply Voltage (Continued) Power Dissipation vs 20038340 20038349 Power Dissipation vs Output Power 20038309 9 Output Power 20038351 Output Power vs Supply Voltage 20038354 LM4843MH 20038365 www.national.com ...
Page 10
... Typical Performance Characteristics LM4843MH (Note 17) Power Derating Curve Note 17: These curves show the thermal dissipation ability of the LM4843MH at different ambient temperatures given these conditions: 2 500LFPM + 2in : The part is soldered to a 2in 2 2in on bottom: The part is soldered to a 2in 2 2 2in : The part is soldered to a 2in , 1oz ...
Page 11
... The last two area recommendations apply for 25˚C ambient temperature. Increase the area to compensate for ambient temperatures above 25˚C. In sys- tems using cooling fans, the LM4843MH can take advantage of forced air cooling. With an air flow rate of 450 linear-feet 2 per minute and a 2 ...
Page 12
... DAP pad that expands to a copper area of 5in PCB, the LM4843’s θ is 20˚C/W. In the MH package JA soldered to a DAP pad that expands to a copper area of 2in on a PCB, the LM4843MH’s θ JA LM4843MH package, θ = 80˚C/W. At any given ambient JA ...
Page 13
Application Information Higher value capacitors need more time to reach a quiescent DC voltage (usually V /2) when charged with a fixed cur- DD rent. The amplifier’s output charges the input capacitor through the feedback resistor Thus, pops ...
Page 14
Application Information Volume Control Table ( Table 2 ) Gain Voltage Range (% of Vdd) (dB) Low High Recommended Low 0 77.5% 100.00% 100.000% -1 75.0% 78.5% 76.875% -2 72.5% 76.25% 74.375% -3 70.0% 73.75% 71.875% -4 67.5% 71.25% 69.375% ...
Page 15
Application Information AUDIO POWER AMPLIFIER DESIGN Audio Amplifier Design: Driving 1W into an 8Ω Load The following are the desired operational parameters: Power Output: Load Impedance: Input Level: Input Impedance: Bandwidth: 100 Hz−20 kHz The design begins by specifying the ...
Page 16
Item Part Number Part Description 1 551011373-001 LM4843 Eval Board PCB etch 001 10 482911373-001 LM4843 MSOP 25 152911368-001 Tant Cap 0.1µF 10V 10% Size = A 3216 26 152911368-002 Tant Cap 0.33µF 10V 10% Size = A 3216 27 ...
Page 17
... LM4843MH Demo Boards Top Layer SilkScreen Top Layer TSSOP 17 20038393 20038394 www.national.com ...
Page 18
... LM4843MH Demo Boards www.national.com (Continued) Bottom Layer (2) LM4843MH 18 20038392 ...
Page 19
... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted Exposed-DAP TSSOP Package Order Number LM4843MH 2. A critical component is any component of a life support device or system whose failure to perform ...