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LM4961 Arkusz danych(PDF) 1 Page - National Semiconductor (TI) |
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LM4961 Arkusz danych(HTML) 1 Page - National Semiconductor (TI) |
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1 / 16 page  LM4961 Ceramic Speaker Driver General Description The LM4961 is an audio power amplifier primarily designed for driving Ceramic Speaker for applications in Cell Phone and PDAs. It integrates a boost converter, with variable output voltage, with an audio power amplifier. It is capable of driving 15V p-p in BTL mode to 2uF+ 30 ohms load, continu- ous average power, with less than 1% distortion (THD+N) from a 3.2V DC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal number of external components. The LM4961 does not require boot- strap capacitors, or snubber circuits therefore it is ideally suited for portable applications requiring high voltage output to drive capacitive loads like Ceramic Speakers. The LM4961 features a low-power consumption shutdown mode. Additionally, the LM4961 features an internal thermal shut- down protection mechanism. The LM4961 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4961 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications n Quiescent Power Supply Current 7mA (typ) n Voltage Swing in BTL at 1% THD 15Vp-p (typ) n Shutdown current 0.1µA (typ) Features n Pop & click circuitry eliminates noise during turn-on and turn-off transitions n Low current shutdown mode n Low quiescent current n Mono 15Vp-p BTL output, R L = 2µF+30 Ω, f = 1kHz n Thermal shutdown protection n Unity-gain stable n External gain configuration capability n Including Band exchange SW n Including Leakage cut SW Applications n Cellphone n PDA Connection Diagram LM4961LQ (5x5) 20094084 Top View Order Number LM4XXX See NS Package Number Boomer® is a registered trademark of National Semiconductor Corporation. October 2004 © 2004 National Semiconductor Corporation DS200940 www.national.com |
Podobny numer części - LM4961 |
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Podobny opis - LM4961 |
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