Amplifier

LTK5128 Datasheet – Audio Power Amplifier Chip

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Part Number: LTK5128

Function: 5W,  AB/ D Audio Power Amplifier

Package  : ESOP-8 type

Manufacturer: LTKCHIP TECHNOLOGY

Image

ltk5128-audio-power-amplifier-chip

Description

The LTK5128 is a 5W, mono Class AB / Class D operating mode cut Function, ultra-low EMI, no need to filter the audio power amplifier chip.

The chip is designed to operate with a wide input voltage range and has protection features such as over-voltage protection, over-current protection, and thermal shutdown protection. It is commonly used in electronic devices such as personal computers, communication equipment, and consumer electronics.

The LTK5128 through a MODE pin can easily switch to AB class Mode, completely eliminate EMI interference. Operating voltage 2.5V-5.5V, in Class D Amplifier mode can provide more than 90% efficiency, the new filter-free Wave structure can save the traditional Class D amplifier output low-pass filter, Thus saving the system cost and PCB space, is ideal for portable applications select. LTK5128 using a unique DRC (Dynamic range control) Technology, reducing the high-power output, due to the loss of the waveform cut to bring the top True, compared to similar products, dynamic response is even better.

 

Pinout

ltk5128-datasheet-pinout

 

Features

1. Filterless Class D / Class AB amplifiers with low quiescent current sum Low EMI

2. FM mode without interference

3. Excellent blasting sound suppression circuit

4. Low noise, low distortion

5. DRC dynamic distortion correction circuit

6.  10% THD + N, VDD = 5V, 4Ω load, provided Up to 3W of output power

7. 10% THD + N, VDD = 5V, 2Ω load, provided Up to 5W of output power

8. Short-circuit current protection

9. Undervoltage protection

10. Shutdown current <0.5uA

 

Application Circuit

ltk5128-application-circuit

Applications

1. Bluetooth speaker

2. Trolley speakers, USB speakers

3. Video player, loudspeaker, etc.

LTK5128 Datasheet PDF

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PT4515 Datasheet – LED Driver Chip – PowTech

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This is an LED driver chip manufactured by PowTech. It is designed to provide efficient power conversion and stable performance for driving LEDs, especially for applications requiring high efficiency and precision control.

Part Number: PT4515

Function: Single-stage linear LED driver chip

Package: TO252-2L, SOT89-3L Type

Manufacturer: PowTech

Image

PT4515 LED Driver

Description

PT4515 is a high-precision linear LED driver chip with a single-stage architecture and no EMI problems. The system does not require magnetic components such as inductors or transformers, and the entire system structure is simple and low-cost.

This LED Driver Chip uses patented current control and compensation technology. The current accuracy can be controlled within ±3%, which can be set by external resistors, and the peak current is 60mA. Multiple chips can be used in parallel to increase current output capacity. PT-4515 has built-in over-temperature and high-voltage automatic current reduction function, and over-temperature protection function.

PT4515 has a high-voltage current drop function. When the voltage of the chip OUT pin is too high (>70V), the output current will be gradually reduced to keep the output power at an approximately constant value to improve the stability of the system. When the high-voltage current drop is in effect, the output current is reduced to a maximum of one-third of the set output current. The system will continuously detect the OUT pin voltage. When the OUT pin voltage drops below 70V, the system current returns to normal.

Features

1. Simple peripheral circuit, no magnetic components required

2. Internally integrated high-voltage startup circuit

3. LED output current is adjustable, supporting a maximum peak current of 60mA

4. Supports multi-chip parallel connection to increase current output capability

5. ±3% LED output current accuracy

6. Excellent EMI performance

7. Over-temperature automatic current adjustment function

8. High-voltage automatic current adjustment function

9. Over-temperature protection function

Pinouts

PT4515 datasheet pinout

Applications

1. LED candle lamp

2. LED bulb/spotlight

3. Other compact LED lighting products

 

Advantages of use:

1. Easy charging via USB power

2. Low-cost solution due to simple circuit configuration

3. Safe charging possible due to built-in various protection functions

 

Other data sheets within the file: PT4515ETOW, PT4515E89C

 

PT4515 Datasheet PDF

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