Description
LM4863 Dual 2.2W Audio Amplifier Plus Stereo Headphone Function
The is a dual bridge-connected audio power amplifier which, when connected a 5V supply, will deliver a 4 load (Note a 3 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. 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 LM4863 combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip. The LM4863 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.
Note or LM4863LQ that has been properly mounted to a circuit board will deliver 2.2W into 4. The other package options for the LM4863 will deliver 1.1W into 8. See the Application Information sections for further information concerning the LM4863MTE and LM4863LQ. Note or LM4863LQ that has been properly mounted to a circuit board and forced-air cooled will deliver 2.5W into 3.
at 1% THD+N 3, 4 loads 3, 4 loads LM4863MTE, 8 load 1.1W(typ) n Single-ended mode THD+N at 75mW into 0.5%(max) n Shutdown current 0.7µA(typ) n Supply voltage range to 5.5V
Features
Stereo headphone amplifier mode “Click and pop” suppression circuitry Unity-gain stable Thermal shutdown protection circuitry SOIC, DIP, TSSOP and exposed-DAP TSSOP and LLP packages
Applications
n Multimedia monitors n Portable and desktop computers n Portable televisions
Note: Pin out shown for DIP and SO packages. Refer to the Connection Diagrams for the pinout of the TSSOP, Exposed-DAP TSSOP, and Exposed-DAP LLP packages.
Boomer is a registered trademark of National Semiconductor Corporation.
Top View Order Number LM4863M, LM4863N See NS Package Number M16B for SO See NS Package Number N16E for DIP
Top View Order Number LM4863MT See NS Package Number MTC20 for TSSOP
Top View Order Number LM4863MTE See NS Package Number MXA20A for Exposed-DAP TSSOP
Top View Order Number LM4863LQ See NS Package Number LQA24A for Exposed-DAP LLP
JC (typ) M16B JA (typ) M16B JC (typ) N16A JA (typ) N16A JC (typ) MTC20 JA (typ) MTC20 JC (typ) MXA20A JA (typ) MXA20A JA (typ) MXA20A JA (typ) MXA20A JC (typ) LQ24A JA (typ) LQ24A
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 (Note 4) ESD Susceptibility(Note 5) ESD Susceptibility (Note 6) Junction Temperature Solder Information Small Outline Package Vapor Phase (60 sec.) Infrared (15 sec.) -0.3V to VDD +0.3V Internally limited 200V 150°C
Temperature Range TMIN TA TMAX Supply Voltage 85°C 2.0V VDD 5.5V
See AN-450 “Surface Mounting and their Effects on Product Reliablilty” for other methods of soldering surface mount devices. Thermal Resistance
The following specifications apply for VDD = 5V unless otherwise noted. Limits apply for = 25°C. Symbol Parameter Conditions LM4863 Typical (Note 12) VDD IDD Supply Voltage Quiescent Power Supply Current VIN = 0A (Note 14), HP-IN = 0V VIN = 0A (Note 14), HP-IN = 4V ISD VIH VIL Shutdown Current Headphone High Input Voltage Headphone Low Input Voltage VDD applied to the SHUTDOWN pin Limit (Note V (min) V (max) mA (max) mA (min) mA µA (min) V (min) V (max) Units (Limits)
The following specifications apply for VDD = 5V unless otherwise specified. Limits apply for = 25°C. Symbol Parameter Conditions LM4863 Typical (Note 12) VOS PO Output Offset Voltage Output Power (Note 15) VIN = 0V THD+N = 1kHz (Note = 8 THD+N = 1kHz (Note RL W Limit (Note 13) 50 Units (Limits)