TPA2050D4 具有立体声 D 类放大器和 DirectPath™ 耳机放大器的 1.4W/通道 2 输入音频子系统

The TPA2050D4 features a stereo Class-D poweramplifier along with a stereo DirectPath headphone amplifier. The TPA2050D4 has two stereo single-ended (SE) inputs that can be configured as one stereo differential input. Both input channels have a 32-step volume control and the DirectPath headphone amplifier has a 4-level gain control for coarse volume adjustment. All amplifiers have output short-circuit and thermal-overload protection.

The Class-D amplifiers deliver 1.25 W into 8 Ω at 1% THD from a 5.0 V supply, and 700 mW from 3.6 V. The DirectPath headphone amplifier features an output voltage limiter to reduce the maximum output power to one of seven possible limits. The voltage limiter is programmed through the I2C interface

	TPA2050D4	TPA2051D3	TPA2054D4A
Speaker Channels	Stereo	Mono	Stereo
Speaker Output Power/Ch (W)	1.4	2.9	2.4
Speaker Min Load (Ohms)	8	4	4
Speaker PSRR (dB)	77.7	75	77.7
Headphone Channels	Stereo	Stereo	Stereo
Ground Centered Headphone	Yes	Yes	Yes
Headphone Output Power/Ch (mW)	145	25	145
Headphone Min Load (Ohms)	16	16	16
Headphone PSRR (dB)	78.5	80	78.5
No. of Inputs	2 SE Stereo, 1 Diff Stereo	1 Diff Mono, 2 SE Stereo	2 SE Stereo, 1 Diff Mono
Audio Mode Control	I2C	I2C	I2C
Supply Voltage (Min) (V)	2.5	2.5	2.5
Supply Voltage (Max) (V)	5.5	5.5	5.5
Pin/Package	25DSBGA	25DSBGA	25DSBGA
Approx. Price (US$)	1.10 \| 1ku	0.75 \| 1ku	1.20 \| 1ku

TPA2050D4 特性

Stereo Class-D Amp:
- 1.4 W into 8 Ω from 5.0 V (10% THD + N)
- 1.25 W into 8 Ω; from 5.0 V (1% THD + N)
DirectPath™ Stereo Headphone Amplifier
- No Output Capacitors Required
Gain Select for Headphone Amplifier
Eight Programmable Maximum Headphone Voltage Limits
Two Single-Ended or One Differential Stereo Input
2:1 Input MUX with Mode Control
32-Step Volume Control for Both Input Channels
Independent Shutdown for Headphone and Class-D Amplifiers
Short-Circuit and Thermal-Overload Protection
±8 kV HBM ESD Protection on Headphone Outputs
I2C Interface
25-Ball 2,61 mm × 2,61 mm WCSP
APPLICATIONS
- Smart Phones / Cellular Phones
- Laptop Computers
- Portable Gaming
- Portable Media Players

TPA2050D4 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
TPA2050D4YZKR	ACTIVE	-40 to 85	1.10 \| 1ku	DSBGA (YZK) \| 25	3000 \| LARGE T&R
TPA2050D4YZKT	ACTIVE	-40 to 85	1.30 \| 1ku	DSBGA (YZK) \| 25	250 \| SMALL T&R

TPA2050D4 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
TPA2050D4YZKR	Green (RoHS & no Sb/Br)	SNAGCU	Level-1-260C-UNLIM	TPA2050D4YZKR	TPA2050D4YZKR
TPA2050D4YZKT	Green (RoHS & no Sb/Br)	SNAGCU	Level-1-260C-UNLIM	TPA2050D4YZKT	TPA2050D4YZKT

TPA2050D4 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
TPA2050D4 评估模块 (EVM)	TPA2050D4EVM	开发电路板/EVM