Precautions

3.1 Precautions

Power Supply Input Polarity and Maximum Voltage

Always ensure that the polarity and voltage of the external power connected to VCC power input connector J1, J2, and/or VDD power input connector J6 are correct. Overvoltage or reverse-polarity power applied to these terminals can open onboard soldered-in fuses and cause other damage to the platform, installed evaluation modules, and/or the power source.

Inserting or Removing EVM Boards

Do not insert or remove EVM boards with power applied Ð damage to the EVM board, the platform, or both may result.

Figure 3±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform

Power Input

 

 

 

 

 

 

 

 

 

 

JP1

 

 

 

 

 

 

 

 

 

F1

C1+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VR1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J1 VCC In +

VCC(J1) DC SOURCE

JP2 AC/DC (J2)

JP3 Batt

 

 

 

 

 

 

 

 

OffPwr

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D4 J2 AC/DC In

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D3

 

D2

D1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J3 Right In

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R1

 

 

 

 

 

 

 

 

 

 

 

 

 

LED1 VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

On

ICC

 

S1

JP4

 

 

 

B1

 

IDD

JP5

Audio

 

Power

 

SUPPLY

POWER

 

VR2

U6

F2

 

 

 

DC

 

 

 

Power

 

 

 

In/Out

 

 

 

+

R2

 

 

J6 VDD In/Out

 

 

 

 

LED2 VDD

 

J7

 

 

Right Out

Audio Input

Signal Conditioning

J4 Stereo In

U1

J5 Left In

****CAUTION****

Do not insert or remove

EVM boards with power

applied

Plug-N-Play Audio Amplifier

TEXAS INSTRUMENTS 1997

Evaluation Platform

SLOP097 Rev. C.1

 

Amps

 

S2

Off

U3

Conditioning

On

U4

U5

TP1

GND

 

 

 

 

 

 

 

J8

 

 

 

 

 

 

 

 

+

 

 

 

 

 

 

 

Right Out

 

 

U2

 

 

 

 

 

±

 

 

 

 

 

 

 

 

±

 

 

 

 

 

 

 

Left Out

 

 

 

 

JP6

Mode

+

 

 

 

 

Mute

 

U5

HP(U5) U2-U4

JP7

 

StereoLeft

 

JP8

Spk(U2-U4)

 

 

 

Polarity

 

 

J9

 

 

 

Lo

 

 

 

 

 

 

 

 

Hi

 

 

Out

 

 

 

 

 

 

 

 

S3 HP Source

+

 

C3

 

 

J10

R3

+

 

C2

HP Out

 

 

 

 

 

 

R4 R5

Speaker

Output

Headphone Output

3-2

Details

Page 16
Image 16
Texas Instruments SLOU082 manual ±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform

SLOU082 specifications

Texas Instruments SLOU082 is a technical document primarily focused on the TPS7A47 device, which is an enhanced, low-noise linear voltage regulator designed for world-class performance in sensitive analog applications. This document explains the features, technologies, and characteristics that set the TPS7A47 apart in the industry.

One of the main features of the TPS7A47 is its ultra-low output noise, boasting a remarkable specification of just 1.2 μVRMS across a bandwidth of 10 Hz to 100 kHz. This characteristic makes it an ideal choice for high-precision, low-noise applications such as RF and audio signal processing, where minimizing noise is crucial for system performance. Additionally, the device offers a wide output voltage range from 1.4 V to 20 V, providing flexibility in various applications.

The TPS7A47 operates with a maximum output current of 1 A, enabling it to support multiple loads efficiently. Its dropout voltage is impressively low, particularly at light load conditions, ensuring high-efficiency performance in battery-powered applications. This aspect significantly extends battery life, making it suitable for portable devices.

Another highlight is the PowerPAD package offered for the TPS7A47, which enhances thermal performance and simplifies PCB design. The integration of thermal protection ensures the regulator operates safely under various conditions, preventing potential damage due to overheating.

The TPS7A47 also includes features such as reverse current protection, which prevents current from flowing back into the input when the output voltage exceeds the input voltage. This feature enhances reliability and extends the longevity of the device in various circuit configurations.

In terms of control, the TPS7A47 utilizes a low-dropout architecture, ensuring steady voltage regulation with minimal input-to-output voltage differential. It also supports a wide range of capacitor types, which allows for flexibility in component selection in layout design.

Overall, the Texas Instruments SLOU082 document on the TPS7A47 provides detailed insights into one of the most effective voltage regulation solutions available today. With exceptional noise performance, a versatile voltage range, robust thermal management, and reliability characteristics, the TPS7A47 is an exemplary choice for engineers and designers aiming to achieve high-performance analog systems.