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TPA321 具有差动输入的 350mW 低压音频功率放大器

The TPA321 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications where internal speakers are required. Operating with a 3.3-V supply, the TPA321 can deliver 250-mW of continuous power into a BTL 8- load at less than 1% THD+N throughout voice band frequencies. Although this device is characterized out to 20 kHz, its operation was optimized for narrower band applications such as cellular communications. The BTL configuration eliminates the need for external coupling capacitors on the output in most applications, which is particularly important for small battery-powered equipment. This device features a shutdown mode for power-sensitive applications with a quiescent current of 0.

	TPA301	TPA311	TPA321
Speaker Channels	Mono	Mono	Mono
Speaker Amp Type	Class-AB	Class-AB	Class-AB
Output Power (W)	0.35	0.35	0.35
PSRR (dB)	85	85	85
Supply Min (Min) (Volt)	2.5	2.5	2.5
Supply Max (Max) (Volt)	5	5.5	5.5

TPA321 特性

• Fully Specified for 3.3-V and 5-V Operation
• Wide Power Supply Compatibility 2.5 V - 5.5 V
• Output Power for RL = 8
  • 350 mW at VDD = 5 V, BTL
  • 250 mW at VDD = 3.3 V, BTL
• Ultra-Low Quiescent Current in Shutdown Mode...0.15 µA
• Thermal and Short-Circuit Protection
• Surface-Mount Packaging
  • SOIC
  • PowerPAD™ MSOP

TPA321 芯片订购指南

器件	状态	温度	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
TPA321D	ACTIVE		0.36 | 1ku	SOIC (D) | 8	75 | TUBE
TPA321DG4	ACTIVE		0.36 | 1ku	SOIC (D) | 8	75 | TUBE
TPA321DGN	ACTIVE		0.46 | 1ku	MSOP-PowerPAD (DGN) | 8	80 | TUBE
TPA321DGNG4	ACTIVE		0.46 | 1ku	MSOP-PowerPAD (DGN) | 8	80 | TUBE
TPA321DGNR	ACTIVE		0.40 | 1ku	MSOP-PowerPAD (DGN) | 8	2500 | LARGE T&R
TPA321DGNRG4	ACTIVE		0.40 | 1ku	MSOP-PowerPAD (DGN) | 8	2500 | LARGE T&R
TPA321DR	ACTIVE		0.30 | 1ku	SOIC (D) | 8	2500 | LARGE T&R
TPA321DRG4	ACTIVE		0.30 | 1ku	SOIC (D) | 8	2500 | LARGE T&R

TPA321 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
TPA321D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPA321D	TPA321D
TPA321DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPA321DG4	TPA321DG4
TPA321DGN	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPA321DGN	TPA321DGN
TPA321DGNG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPA321DGNG4	TPA321DGNG4
TPA321DGNR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPA321DGNR	TPA321DGNR
TPA321DGNRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPA321DGNRG4	TPA321DGNRG4
TPA321DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPA321DR	TPA321DR
TPA321DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TPA321DRG4	TPA321DRG4

TPA321 工具与软件

培训内容	型号	软件/工具类型
音频的快速搜索选择工具	AUDIO_SELECTION_TOOL	免费评估工具
TPA321 评估模块 (EVM)	TPA321EVM	开发电路板/EVM

TPA321 应用技术支持与电子电路设计开发资源下载

1. TPA321 数据资料 dataSheet 下载.PDF
2. TI 德州仪器扬声器放大器和调制器产品选型与价格 . xls