TPA2018D1

具有 SmartGain™ AGC/DRC 的 3W 单声道 D 类音频放大器

The is a mono, filter-free Class-D audio power amplifier with volume control, dynamic range compression DRC and automatic gain control AGC. It is available in a 1.63 mm x 1.63 mm WCSP package.

The DRC/AGC function in the TPA2018D1 is programmable via 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 TPA2018D1 is capable of driving 3 W at 5 V into 4 load or 880 mW at 3.6 V into 8 load. The device features hardware and software shutdown controls and also provides thermal and short-circuit protection.

In addition to these features, a fast start-up time and small package size make the TPA2018D1 an ideal choice for cellular handsets, PDAs and other portable applications.

.

Filter-Free Class-D Architecture

.

3 W Into 4 at 5 V 10% THD+N

.

880 mW Into 8 at 3.6 V 10% THD+N

.

Power Supply Range: 2.5 V to 5.5 V

.

Flexible Operation With/Without I2C

.

Programmable DRC/AGC Parameters

.

Digital I2C Volume Control

.

Selectable Gain from -28 dB to 30 dB in 1-dB Steps when compression is used

.

Selectable Attack, Release and Hold Times

.

4 Selectable Compression Ratios

.

Low Supply Current: 1.8 mA

.

Low Shutdown Current: 0.2 µA

.

High PSRR: 80 dB

.

Fast Start-up Time: 5 ms

.

AGC Enable/Disable Function

.

Limiter Enable/Disable Function

.

Short-Circuit and Thermal Protection

.

Space-Saving Package

.

1,63 mm × 1,63 mm Nano-Free WCSP YZF

.

APPLICA ONS

.

Wireless or Cellular Handsets and PDAs

.

Portable Navigation Devices

.

Portable DVD Player

.

Notebook PCs

.

Portable Radio

.

Portable Games

.

Educational Toys

.

USB Speakers