Overview
The TEA1738LT/N1,118 is a Switched Mode Power Supply (SMPS) controller IC developed by NXP USA Inc. This component is part of the GreenChip family, designed to enable the creation of low-cost, highly efficient, and reliable power supplies. The TEA1738LT is specifically tailored for flyback topologies and operates in peak current and frequency control mode, making it suitable for a wide range of AC-DC power applications.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | 8-pin SO (Small Outline) |
| Switching Frequency | Fixed with frequency jitter to reduce EMI |
| Operating Mode | Peak current and frequency control mode |
| Conduction Mode | Continuous Conduction Mode (CCM) with slope compensation |
| OverPower Protection (OPP) | Allows operation under overpower situations for a limited time |
| Protection Features | Input UnderVoltage Protection (UVP), output OverVoltage Protection (OVP), OverTemperature Protection (OTP) |
| OverCurrent Protection (OCP) | Low and adjustable OCP trip level |
| Soft Start | Adjustable soft start |
| Power Dissipation | Up to 0.5 W at Tamb < 75°C |
| Storage Temperature | -55°C to 150°C |
| Junction Temperature | -40°C to 150°C |
| ESD Protection | 4000 V (Human Body Model) |
Key Features
- Low cost and highly efficient design
- Fixed switching frequency with frequency jitter to reduce ElectroMagnetic Interference (EMI)
- Frequency reduction at medium power operation and increase at peak power operation to maintain high efficiency
- Slope compensation for Continuous Conduction Mode (CCM) operation
- Adjustable OverCurrent Protection (OCP) trip level and soft start
- Integrated OverPower Protection (OPP) and OverTemperature Protection (OTP)
- Input UnderVoltage Protection (UVP) and output OverVoltage Protection (OVP) with minimal external components
- Low power consumption in Power-down mode (10 μA typical)
Applications
The TEA1738LT/N1,118 is suitable for a variety of AC-DC power supply applications, including:
- Consumer electronics power supplies
- Industrial power supplies
- Telecommunication equipment power supplies
- LED lighting power supplies
- Other applications requiring efficient and reliable SMPS solutions
Q & A
- What is the primary function of the TEA1738LT/N1,118?
The TEA1738LT/N1,118 is a Switched Mode Power Supply (SMPS) controller IC designed for flyback topologies, enabling the creation of low-cost, highly efficient power supplies.
- What are the key protection features of the TEA1738LT/N1,118?
The IC includes Input UnderVoltage Protection (UVP), output OverVoltage Protection (OVP), OverTemperature Protection (OTP), and OverPower Protection (OPP).
- How does the TEA1738LT/N1,118 reduce ElectroMagnetic Interference (EMI)?
The IC uses a fixed switching frequency with frequency jitter to reduce EMI.
- What is the operating mode of the TEA1738LT/N1,118?
The IC operates in peak current and frequency control mode.
- What is the purpose of the slope compensation in the TEA1738LT/N1,118?
The slope compensation is integrated for Continuous Conduction Mode (CCM) operation.
- How does the TEA1738LT/N1,118 handle overpower situations?
The IC includes OverPower Protection (OPP) that allows operation under overpower situations for a limited amount of time.
- What is the power dissipation of the TEA1738LT/N1,118 at ambient temperatures below 75°C?
The power dissipation is up to 0.5 W at Tamb < 75°C.
- What are the storage and junction temperature ranges for the TEA1738LT/N1,118?
The storage temperature range is -55°C to 150°C, and the junction temperature range is -40°C to 150°C.
- What is the ESD protection level of the TEA1738LT/N1,118?
The IC has an ESD protection level of 4000 V (Human Body Model).
- How does the TEA1738LT/N1,118 manage power consumption in Power-down mode?
In Power-down mode, the IC consumes a very low supply current (10 μA typical).
