LM4953 Datasheet | National Semiconductor

Description The LM4953 is an audio power amplifier designed for driving Ceramic Speaker in portable applications. When powered by a 3.6V supply, it is capable of forcing 12.6Vpp across a 2µF + 30Ω bridge-tied-load (BTL) with less than 1% THD+N. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external ponents. The LM4953 does not require bootstrap capacitors, or snubber circuits. Therefore it is ideally suited for display applications requiring high power and minimal size. The LM4953 features a low-power consumption shutdown mode. Additionally, the LM4953 features an internal thermal shutdown protection mechanism. The LM4953 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4953 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Quiescent Power Supply Current (Vdd = 3V) 7m A(typ) j BTL Voltage Swing (2µF+30Ω load, 1% THD+N, Vdd = 3.6V) j Shutdown Current 12.6Vpp (typ) 1µA (max) Features n Pop & click circuitry eliminates noise during turn-on and turn-off transitions n Low, 1µA (max) shutdown current n Low, 7m A (typ) quiescent current n 12.6Vpp mono BTL output, load = 2µF+ 30Ω n Thermal shutdown n Unity-gain stable n External gain configuration capability Applications n Cellphone n PDA Typical Application FIGURE 1. Typical Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation. © 2005 National Semiconductor Corporation DS201421 .national. Connection Diagram LLP Package .. Top View Order Number LM4953SD See NS Package Number SDA14A Pin Descriptions Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Name SD CPVDD CCP+ PGND CCPVCP_OUT NC AVSS OUT B AVDD OUT A NC VIN SGND Function Active Low Shutdown Charge Pump Power Supply Positive Terminal - Charge Pump Flying Capacitor Power Ground Negative...