产品描述:
LM48557是一款单电源、单声道、带集成电荷泵的陶瓷扬声器驱动器,专为便携式设备而设计,例如手机和便携式媒体播放器,这些设备的主板空间非常宝贵。LM48557电荷泵允许该设备从单4.2V电源提供5.8Vrms。
LM48557具有高电源抑制比(PSRR),在217赫兹时可达80dB,无需额外的电源调节即可在嘈杂环境中工作。灵活的电源要求允许在2.7V到4.5V之间运行。LM48557具有有效的低电平复位输入,可将器件恢复到默认状态。此外,LM48557还具有36步I2C音量控制和静音功能。低功耗关断模式将电源电流消耗降低到0.01uA
LM48557‘S卓越的卡嗒和爆音抑制消除了上电/关机和关机时的声音瞬变。LM48557采用超小型16凹凸DSBGA封装(1.965 mm x 1.965 mm)。
产品特性:
- Integrated Charge Pump
- Bridge-Tied Load Output
- Differential Input
- High PSRR
- I2C Volume and Mode Control
- Reset Input
- Advanced Click-and-Pop Suppression
- Low Supply Current
- Minimum External Components
- Micro-Power Shutdown
- Available in Space-Saving 16-Bump DSBGA Package
Key Specifications
- Output Voltage at VDD = 4.2V
- RL = 1µF +22Ω, THD+N ≤ 1%: 5.8 VRMS (Typ)
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模拟supply(min)(V)2.7
模拟supply(max)(V)4.5
Speakerchannels(max)Mono
音频输入类型模拟
停机current(ISD)(µA)0.01
PSRR(dB)80
Iq规格(毫安)5
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