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Part Number: LM4873_1334329
Description: The LM4873 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will...
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LM4873_1334329
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General Description
LM4873_1334329 General Description
The LM4873 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4W load (Note 1) or 2.4W to a 3W load (Note 2)with less than 1.0% THD+N. In addition, the headphone input pin allows the amplifiers to operate in single-ended mode to drive stereo headphones.
A Mux Control pin toggles between the two stereo sets of amplifier inputs, allowing for two selectable amplifier closed-loop responses. Boomer audio power amplifiers were designed specifically to provide high quality output power from a surface mount package while requiring few external components. To simplify audio system design, the LM4873 combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip.
The LM4873 features an externally controlled, low-power consumption shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection. It also utilizes circuitry to reduce "clicks and pops" during device turn-on.
LM4873_1334329 Maximum Ratings
| Supply Voltage |
6.0V |
| Storage Temperature |
-65°C to +150°C |
| Input Voltage |
-0.3V to VDD +0.3V |
| Power Dissipation (Note 11) |
Internally limited |
| Solder Information (Note 1)Vapor Phase (60 sec.) Infrared (15 sec.) |
215°C 220°C |
| ESD Susceptibility (Note 13) |
200V |
| Junction Temperature |
150°C |
| Thermal Resistance qJC (typ)-M16B qJA (typ)-M16B qJC (typ)-N16A qJA (typ)-N16A qJC (typ)-MTC20 qJA (typ)-MTC20 qJC (typ)-MXA20A qJA (typ)-MXA20A qJA (typ)-MXA20A qJA (typ)-MXA20A qJC (typ)-MXA28A qJA (typ)-MXA28A qJA (typ)-MXA28A qJA (typ)-MXA28A |
20°C/W 80°C/W 20°C/W 63°C/W 20°C/W 80°C/W 2°C/W 41°C/W (Note 5) 51°C/W (Note 6) 90°C/W (Note 7) 2°C/W 41°C/W (Note 8) 51°C/W (Note 9) 90°C/W (Note 10) |
LM4873_1334329 Features
Input mux control and two separate inputs per channel
Stereo headphone amplifier mode
"Click and pop" suppression circuitry
Thermal shutdown protection circuitry
Exposed-DAP TSSOP and TSSOP packaging available
Stereo headphone amplifier mode
"Click and pop" suppression circuitry
Thermal shutdown protection circuitry
Exposed-DAP TSSOP and TSSOP packaging available
LM4873_1334329 Typical Application
Multimedia monitors
Portable and desktop computers
Portable audio systems
Portable and desktop computers
Portable audio systems
LM4873_1334329 Connection Diagram
LM40
PDF/DataSheet Download
- Datasheet: LM40
- File Size: 378376 KB
- Manufacturer: NSC [National Semiconductor]
- Click here to Download
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