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LM4954TLX 数据表(PDF) 1 Page - National Semiconductor (TI) |
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LM4954TLX 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 16 page LM4954 High Voltage 3 Watt Audio Power Amplifier General Description The LM4954 is an audio power amplifier primarily designed for demanding applications in mobile phones and other por- table communication device applications. It is capable of delivering 2.4 Watts of continuous average power to an 8 Ω BTL load with less than 1% THD+N from a 7V DC power supply. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal number of external components. The LM4954 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for lower-power portable applications where minimal space and power consumption are primary require- ments. The LM4954 features a low-power consumption global shut- down mode which is achieved by driving the shutdown pin with logic low. Additionally, the LM4954 features an internal thermal shutdown protection mechanism. The LM4954 contains advanced pop & click circuitry which eliminates noises that would otherwise occur during turn-on and turn-off transitions. The LM4954 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Wide Power Supply Voltage Range 2.7 ≤ V DD ≤ 9V j Output Power: VDD = 7V, 1% THD+N 2.4W (typ) j Quiescent power supply current 3mA (typ) j PSRR: VDD = 5V and 3V at 217Hz 80dB (typ) j Shutdown power supply current 0.01µA (typ) Features n No output coupling capacitors, snubber networks or bootstrap capacitors required n Unity gain stable n Externally configurable gain n Ultra low current active low shutdown mode n BTL output can drive capacitive loads up to 100pF n “Click and pop” suppression circuitry n 2.7V - 9.0V operation n Available in space-saving microSMD package Applications n Mobile Phones n PDAs Typical Application Boomer® is a registered trademark of National Semiconductor Corporation. 20129111 FIGURE 1. Typical Audio Amplifier Application Circuit June 2005 © 2005 National Semiconductor Corporation DS201291 www.national.com |
类似零件编号 - LM4954TLX |
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类似说明 - LM4954TLX |
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