LM4871

Part: LM4871 Boomer® Audio Power Amplifier Series from Texas Instruments

Type: Mono Bridged Audio Power Amplifier

Key Specs:

• PO at 10% THD+N, 1kHz (LM4871LD): 3W (typ) into 3Ω
• PO at 10% THD+N, 1kHz (LM4871LD): 2.5W (typ) into 4Ω
• PO at 10% THD+N, 1kHz (All other LM4871 Packages): 1.5W (typ) into 8Ω
• Shutdown Current: 0.6μA (typ)
• Supply Voltage Range: 2.0V to 5.5V
• THD at 1kHz at 1W Continuous Average Output Power into 8Ω: 0.5% (max)

Features:

• No Output Coupling Capacitors Required
• No Bootstrap Capacitors Required
• No Snubber Circuits Required
• Unity-gain Stable
• WSON, VSSOP, SOIC, or PDIP Packaging
• External Gain Configuration Capability
• Pin Compatible with the LM4861
• Micropower shutdown mode
• Thermal shutdown protection

Applications:

• Portable Computers
• Desktop Computers
• Low Voltage Audio Systems

Package:

• WSON: dimensions not specified (Package Number NGN0008A)
• VSSOP: dimensions not specified (Package Number DGK0008A)
• SOIC: dimensions not specified (Package Number D0008A)
• PDIP: dimensions not specified (Package Number D0008E)

• No Output Coupling Capacitors, Bootstrap Capacitors, or Snubber Circuits Required
• Unity-gain Stable
• WSON, VSSOP, SOIC, or PDIP Packaging
• External Gain Configuration Capability
• Pin Compatible with the LM4861

• Portable Computers
• Desktop Computers
• Low Voltage Audio Systems

The following specifications apply for V_DD = 5V and R_L = 8 Ω unless otherwise specified. Limits apply for T_A = 25°C.

• (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication of device performance.
• All voltages are measured with respect to the ground pin, unless otherwise specified.
• (3) Typicals are specified at 25°C and represent the parametric norm.
• (4) Limits are specified to TI's AOQL (Average Outgoing Quality Level).

Product Folder Links: LM4871

• (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication of device performance.
• (2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications.
• (3) The maximum power dissipation must be derated at elevated temperatures and is dictated by T_JMAX , θ_JA , and the ambient temperature T_A . The maximum allowable power dissipation is P_DMAX = (T_JMAX T_A)/θ_JA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4871, T_JMAX = 150 °C. For the θ_JA 's for different packages, please see the Application Information section or the absolute maximum ratings section.
• (4) Human body model, 100pF discharged through a 1.5kΩ resistor.
• (5) Machine Model, 220pF–240pF discharged through all pins.
• (6) The given θ_JA is for an LM4871 packaged in an NGN0008A with the Exposed–DAP soldered to an exposed 1in² area of 1oz printed circuit board copper.

Operating Ratings