TPA2028D1中文资料具有快速自动增益控制和动态范围压缩功能的 3W 单声道、模拟输入 D 类音频放大器数据手册TI规格书

描述 Description

The TPA2028D1 device is a mono, filter-free Class-D audio power amplifier with volume control, fast gain ramp SmartGain, dynamic range compression (DRC), and automatic gain control (AGC). It is available in a 1.63 mm × 1.63 mm wafer chip-scale package (DSBGA).

The DRC/AGC function in the TPA2028D1 device is programmable through a digital I2C interface. The DRC/AGC function can be configured to automatically prevent distortion of the audio signal and enhance quiet passages that are normally not heard. The DRC/AGC can also be configured to protect the speaker from damage at high power levels and compress the dynamic range of music to fit within the dynamic range of the speaker. The gain can be selected from –28 dB to +30 dB in 1-dB steps. The TPA2028D1 is capable of driving 3 W at 5 V into a 4-Ω load or 880 mW at 3.6 V into an 8-Ω load. The device features hardware and software shutdown controls and also provides thermal and short-circuit protection. The TPA2028D1 has a faster AGC gain ramp during start-up than TPA2018D1.

In addition to these features, a fast start-up time and small package size make the TPA2028D1 an ideal choice for cellular handsets, PDAs and other portable applications.

特性 Features

• Fast AGC Start-up Time: 5 ms
• Filter-Free Class-D Architecture
• 880 mW Into 8 Ω at 3.6 V (10% THD+N)
• Flexible Operation With/Without I2C™
• Digital I2C™ Volume Control
• Selectable Attack, Release and Hold Times
• Low Supply Current: 1.8 mA
• High PSRR: 80 dB
• Limiter Enable/Disable Function
• Space-Saving Package
• APPLICATIONS
• Portable Navigation Devices
• Notebook PCs
• Portable Games
• USB Speakers

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