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The TPA2028D1 is a mono 3W filterless Class D audio power amplifier with integrated volume control, dynamic range compression (DRC) and automatic gain control (AGC). The DRV/AGC function can be programmed via the digital I2C interface. 3W power to 4 ohm load (THD+N is 10%), operating voltage from 2.5 V to 5.5 V, operating current 1.8 mA, shutdown current 0.2 uA, mainly used in wireless or cellular phones and PDA, PND, DVD playback , laptops, portable radios and game consoles, and educational toys. This article describes the main features of TPA2028D1, functional block diagrams, indicator test block diagrams, and TPA2028D1YZFEVM evaluation board performance, circuit diagrams and bill of materials (BOM).The TPA2028D1 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 wafer chip- Scale package (WCSP).
The DRC/AGC function in the TPA2028D1 is programmable via a digital I 2 C 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.
Main features of TPA2028D1:
Fast AGC Start-up Time: 5 ms
Pin-out Compatible with TPA2018D1
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 I 2 C
Programmable DRC/AGC Parameters
Digital I 2 C 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
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)
TPA2028D1 application:
• Wireless or Cellular Handsets and PDAs
• Portable Navigation Devices
• Portable DVD Player
• Notebook PCs
• Portable Radio
• Portable Games
• Educational Toys
• USB Speakers
Figure 1. Functional block diagram of the TPA2028D1
Figure 2. Block diagram of the TPA2028D1 indicator test
Figure 3. Block diagram of the simplified application of the TPA2028D1
TPA2028D1YZFEVM Evaluation Board
The TPA2028D1 evaluation module (EVM) is a complete, stand-alone audio board. It contains the TPA2028D1 WCSP (YZF) Class-D audio power amplifier.
TPA2028D1YZFEVM evaluation board indicators:
Figure 4. Outline drawing of the TPA2028D1YZFEVM evaluation board
Figure 5. Circuit diagram of the TPA2028D1YZFEVM evaluation board (1)
Figure 6. Circuit diagram of the TPA2028D1YZFEVM evaluation board (2)
TPA2028D1YZFEVM Evaluation Board Bill of Materials (BOM):
Data Centre,Fiber Optic Patch Cord Assembly,Multimode Fiber Optic Patch Cord,Outdoor Fiber Optic Patch Cord
Huizhou Fibercan Industrial Co.Ltd , https://www.fibercan-network.com