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LM4883SQ Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4883SQ Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 23 page  LM4883 Dual 2.1W Audio Amplifier Plus Stereo Headphone Function General Description The LM4883 is a dual bridge-connected audio power ampli- fier which, when connected to a 5V supply, will deliver 2.1W toa4 Ω load (Note 1) or 2.4W to a 3Ω 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 when driving stereo headphones. A MUX control pin allows selec- tion between the two stereo sets of amplifier inputs. The MUX control can also be used to select two different 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 sim- plify audio system design, the LM4883SQ combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip. The LM4883SQ features an internally controlled, low-power consumption shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection. It also utilizes cir- cuitry to reduce “clicks and pops” during device turn-on. Note 1: An LM4883SQ that has been properly mounted to a circuit board will deliver 2.1W into 4 Ω. See the Application Information sections for further information concerning the LM4883SQ. Note 2: An LM4883SQ that has been properly mounted to a circuit board and forced-air cooled will deliver 2.4W into 3 Ω. Key Specifications j PO at 1% THD+N R L =3 Ω 2.4W (typ) R L =4 Ω 2.1W (typ) R L =8 Ω 1.3W (typ) j Single-ended mode THD+N at 75mW into 32 Ω (5V, 1kHz) 0.01% (typ) j Shutdown current 0.04µA (typ) j Supply voltage range 2.4V to 5.5V j PSRR at 217Hz 85dB (typ) Features n Input mux control and two separate inputs per channel n Stereo headphone amplifier mode n Improved “click and pop” suppression circuitry n Thermal shutdown protection circuitry n PCB area-saving SQ package Applications n Multimedia monitors n Portable and desktop computers n Portable audio systems Connection Diagrams LM4883SQ LM4883SQ Top Mark 200887A3 Top View Order Number LM4883SQ See NS Package Number SQA24B 200887C6 Top View U = Fab Code Z = Assembly Plant Code XY = Date Code TT = Die Traceability Boomer® is a registered trademark of National Semiconductor Corporation. November 2004 © 2004 National Semiconductor Corporation DS200887 www.national.com |
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