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LM4919 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4919 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
1 / 15 page LM4919 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier General Description The unity gain stable LM4919 is both a mono-BTL audio power amplifier and a Single Ended (SE) stereo headphone amplifier. Operating on a single 1.5V supply, the mono BTL mode delivers 85mW into an 8 Ω load at 1% THD+N. In Single Ended stereo headphone mode, the amplifier delivers 14mW per channel into a 16 Ω load at 1% THD+N. With the LM4919 packaged in the MM package, the cus- tomer benefits include low profile and small size. This pack- age minimizes PCB area and maximizes output power. The LM4919 features circuitry that reduces output transients ("clicks" and "pops") during device turn-on and turn-off, an externally controlled, low-power consumption, active-low shutdown mode, and thermal shutdown. Boomer audio power amplifiers are designed specifically to use few exter- nal components and provide high quality output power in a surface mount package. Key Specifications n Mono-BTL output power n (R L =8 Ω,V DD = 1.5V, THD+N = 1%) 85mW (typ) n Stereo Headphone output power n (R L =16 Ω,V DD = 1.5V, THD+N = 1%) 14mW (typ) n Micropower shutdown current 0.02µA (typ) n Supply voltage operating range 0.9V < V DD < 2.5V n PSRR 1kHz, V DD = 1.5V, RL =16 Ω 72dB (typ) Features n Single-cell 0.9V to 2.5V battery operation n BTL mode for mono speaker n Single ended headphone operation with coupling capacitors n Unity-gain stable n "Click and pop" suppression circuitry n Active low micropower shutdown n Low current, active-low mute mode n Thermal shutdown protection circuitry Applications n Portable one-cell audio products n Portable one-cell electronic devices Typical Application Boomer® is a registered trademark of National Semiconductor Corporation. 20082101 FIGURE 1. Block Diagram May 2004 © 2004 National Semiconductor Corporation DS200821 www.national.com |
Số phần tương tự - LM4919 |
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Mô tả tương tự - LM4919 |
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