品牌:SGMICRO/圣邦微 | 型号:SGM4703 | 类型:其他IC |
用途:功放 | 封装:TSSOP-28 | 系列:音频功放 |
功率:2*40W | 包装:3000PCS |
The SGM4703 is a high-power, high-efficiency, stereo Class-D audio power amplifier with adjustable power limit (APL) and automatic level control (ALC). It operates with a wide range of supply voltages from 5V to 26V. With 24V supply voltage, it can deliver 2 脳 40W peak output power for a pair of 8惟 speakers with 10% THD+N. The high efficiency of SGM4703 extends battery life in playing music and allows it to deliver an output power of 2 脳 20W without the need for a bulky heat sink on a two-layer system board. Its high PSRR and low EMI emission reduce system design and manufacturing complexities, as well as lower system cost. The SGM4703 features APL and ALC. The APL limits peak audio outputs to a user-defined value to protect audio speakers from excessive power dissipation or over-load. The APL and ALC adjust the voltage gain of the audio amplifiers in response to over-limit audio inputs, eliminating output clipping distortion while maintaining a maximally allowed dynamic range of audio outputs. The limiting voltage of APL and ALC can be either a user-defined value or the supply voltage. The SGM4703 can be configured into driving either a pair of speakers in Bridge-Tied-Load (BTL) configuration for stereo applications or a single speaker in Parallel BTL (PBTL) configuration for mono applications. The SGM4703 features two PWM modulation schemes for Class-D audio amplifiers: Dual-Side-Modulation (DSM) and Single-Side-Modulation (SSM). In SGM4703, comprehensive protection modes against various operating faults ensure its safe and reliable operation.