LM4913 Datasheet | National Semiconductor

LM4913 2W Monaural, 90m W Stereo Headphone Audio Amplifier December 2002 LM4913 2W Monaural, 90m W Stereo Headphone Audio Amplifier General Description The unity-gain stable LM4913 is both a mono differential output (for bridge-tied loads, or BTL) audio power amplifier and a single-ended (SE) stereo headphone amplifier. Operating on a single 5V supply, the mono BTL mode delivers 2W (typ) to a 4Ω load (Note 1) at 0.3% THD+N. In SE stereo mode, the amplifier will deliver 90m W to 32Ω loads. The LM4913 Features circuitry that suppresses output transients ("clicks and pops"). The LM4913 is designed for notebook and other handheld portable applications. It delivers high quality output power from a surface-mount package and requires few external ponents. The LM4913 is pin and functionally patible with the TPA0213. Other Features include an active-low micro-power shutdown mode and thermal shutdown protection. The LM4913 is available a space efficient 10-lead exposed DAP TSSOP package. Note 1: When operating on a 5VDC supply, an LM4913MH that has been properly mounted to a circuit board will deliver 2W into 4Ω. See the Application Information sections for further information concerning PCB layout suggestions to maximize the LM4913MH’s output power with a 4Ω load. Key Specifications j BTL output power (RL = 4Ω) VDD = at 3.0V, THD = 1% VDD = at 5.0V, THD = 0.3% VDD = at 3.0V VDD = at 5.0V j Micro-power shutdown supply current j PSRR ( @ 1k Hz, 2.9V ≤ VDD ≤ 660m W (typ) 2W (typ) 33m W (typ) 90m W (typ) 1µA (typ) j SE output power (RL = 32Ω and THD = 0.1%) 5.1V, (Fig. 1)) BTL SE 52d B (typ) 62d B (typ) Features n n n n n n n n Advanced "click and pop" suppression circuitry Stereo headphone amplifier mode Low current micro-power shutdown mode Thermal shutdown protection circuitry 2.5V to 5.5V operation Unity-gain stable Gain set with external resistors Space-saving exposed-DAP TSSOP package Applications n PDAs n Cellular phones n Handheld portable electronic...