Overview
The TEA1755LT/1Y518 is a high-voltage (HV) start-up DC-DCM (Discontinuous Conduction Mode) and QR (Quasi-Resonant) flyback controller integrated with a Power Factor Correction (PFC) controller, designed by NXP USA Inc. This controller is part of the third generation of green Switched Mode Power Supply (SMPS) controller ICs, known for their high efficiency and reliability. The TEA1755LT/1Y518 enables the design of cost-effective power supplies with minimal external components, making it suitable for a wide range of applications requiring up to 250 W of power.
Key Specifications
| Parameter | Description |
|---|---|
| Power Rating | Up to 250 W |
| Mains Voltage Range | 70 V (AC) to 276 V (AC) |
| Operating Modes | DCM/QR flyback, PFC |
| Package Type | SOT109-1 |
| Supply Voltage (VCC) | Vth(UVLO) to Vstartup |
| Protection Features | Overvoltage protection, latch input for general-purpose protection |
| Efficiency | High efficiency at all power levels, including low-power modes |
Key Features
- Integrated PFC and flyback controller for high efficiency and reliability.
- Universal mains supply operation (70 V (AC) to 276 V (AC)).
- Quasi-resonant operation with valley skipping and reduced frequency operation at lower power levels.
- High-voltage BCD800 process for direct start-up from rectified universal mains voltage.
- Low-voltage Silicon On Insulator (SOI) for accurate, high-speed protection functions and control.
- Low standby power consumption and minimized audible noise.
- General-purpose latch input for switching off both converters.
Applications
The TEA1755LT/1Y518 is suitable for a variety of applications that require efficient and reliable power supplies, including:
- Consumer electronics such as TVs, monitors, and audio equipment.
- Industrial power supplies.
- Medical devices requiring high efficiency and low noise.
- LED lighting systems.
- Other high-power DC-DC conversion applications.
Q & A
- What is the maximum power rating of the TEA1755LT/1Y518? The TEA1755LT/1Y518 can handle power requirements of up to 250 W.
- What are the operating voltage ranges for the TEA1755LT/1Y518? It operates within a mains voltage range of 70 V (AC) to 276 V (AC).
- What are the integrated controllers in the TEA1755LT/1Y518? It integrates both PFC and flyback controllers.
- What are the key efficiency features of the TEA1755LT/1Y518? It features quasi-resonant operation with valley skipping and reduced frequency operation at lower power levels for high efficiency.
- How does the TEA1755LT/1Y518 manage low-power conditions? During low-power conditions, the flyback controller switches to frequency reduction mode and limits the peak current to 25% of its maximum value.
- What is the purpose of the latch input in the TEA1755LT/1Y518? The latch input is a general-purpose input used to switch off both converters.
- What are the protection features of the TEA1755LT/1Y518? It includes overvoltage protection and a latch input for general-purpose protection.
- How does the TEA1755LT/1Y518 minimize audible noise? It minimizes audible noise by limiting the peak current during low-power conditions.
- What is the package type of the TEA1755LT/1Y518? It is packaged in SOT109-1.
- What are some typical applications of the TEA1755LT/1Y518? Typical applications include consumer electronics, industrial power supplies, medical devices, and LED lighting systems.
