LM4951 Datasheet | Texas Instruments

FEATURES - 2 Click and Pop Circuitry Eliminates Noise during Turn-On and Turn-Off Transitions - Low Current, Active-Low Shutdown Mode - Low Quiescent Current - Thermal Shutdown Protection - Unity-Gain Stable - External Gain Configuration Capability APPLICATIONS - Portable Handheld Devices up to 9V - Cell Phone - PDA KEY SPECIFICATIONS - Wide Voltage Range: 2.7V to 9 V - Quiescent Power Supply Current (VDD = 7.5V): 2.5m A (typ) - Power Output BTL at 7.5V, 1% THD: 1.8 W (typ) - Shutdown Current: 0.01µA (typ) - Fast Turn on Time: 25ms (typ) DESCRIPTION The LM4951 is an audio power amplifier primarily designed for demanding applications in Portable Handheld devices. It is capable of delivering 1.8W mono BTL to an 8Ω load, continuous average power, with less than 1% distortion (THD+N) from a 7.5VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external ponents. The LM4951 does not require bootstrap capacitors, or snubber circuits. The LM4951 features a low-power consumption active-low shutdown mode. Additionally, the LM4951 features an internal thermal shutdown protection mechanism. The LM4951 contains advanced click and pop circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4951 is unity-gain stable and can be configured by external gain-setting resistors. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2004- 2013, Texas Instruments...