Overview
The TEA1998TS/1H is a GreenChip synchronous rectifier controller IC developed by NXP USA Inc. This component is part of a new generation of Synchronous Rectifier (SR) controller ICs designed for switched mode power supplies, particularly for flyback converters. It is fabricated using a Silicon-On-Insulator (SOI) process, which enhances its performance and efficiency. The TEA1998TS/1H is dedicated to synchronous rectification on the secondary side of flyback converters, incorporating both the sensing stage and the driver stage for driving the SR MOSFET. This controller is optimized for maximum efficiency at any load condition, making it suitable for a variety of power supply applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Part Number | TEA1998TS/1H | |
| Manufacturer | NXP USA Inc. | |
| Package / Case | TSOP-6 (SC-74) | |
| Voltage - Supply | 3.7 V to 60 V | V |
| Current - Supply | 250 µA | µA |
| Operating Temperature | -40°C to 150°C | °C |
| Mounting Type | Surface Mount | |
| Output Current | 1.2 mA | mA |
| Output Voltage Range | 4.45 V to 10 V | V |
| Power Dissipation | 300 mW | mW |
| Applications | Secondary-Side Controller, Synchronous Rectifier |
Key Features
- Adaptive Gate Drive: The TEA1998TS/1H features adaptive gate drive for maximum efficiency at any load condition, ensuring fast turn-off at the end of conduction.
- Low Supply Current: It has a typical supply current in no-load operation below 250 µA, enhancing overall system efficiency.
- Self-Supplying Capability: The controller can generate its own supply voltage, making it suitable for battery charging applications with low output voltage or for high-side rectification without an auxiliary winding.
- Wide Voltage Range: It operates in an output voltage range between 10 V and 0 V and can handle input voltages up to 60 V.
- Compatibility with SR MOSFETs: The TEA1998TS/1H supports both standard and logic level SR MOSFETs, providing flexibility in design.
- UnderVoltage LockOut (UVLO): The controller includes UVLO with active gate pull-down, ensuring reliable operation under various conditions.
- Support for Charging Standards: It supports USB BC, QuickCharge, and smart charging applications, making it versatile for modern power supply needs.
Applications
The TEA1998TS/1H is primarily used as a secondary-side controller and synchronous rectifier in flyback converters. It is particularly suited for applications requiring high efficiency and reliability, such as:
- Flyback Power Supplies: It is designed to optimize the performance of flyback converters by minimizing conduction losses and enhancing overall efficiency.
- Battery Charging Applications: The self-supplying capability of the TEA1998TS/1H makes it ideal for battery charging applications, especially those with low output voltage.
- High-Side Rectification: It can be used in high-side rectification configurations without the need for an auxiliary winding, which simplifies the design and improves efficiency.
- USB and QuickCharge Applications: The controller supports USB BC, QuickCharge, and smart charging standards, making it a good fit for modern charging solutions.
Q & A
- What is the primary function of the TEA1998TS/1H?
The TEA1998TS/1H is a synchronous rectifier controller IC designed for the secondary side of flyback converters, optimizing efficiency and performance in switched mode power supplies.
- What is the operating temperature range of the TEA1998TS/1H?
The operating temperature range of the TEA1998TS/1H is from -40°C to 150°C.
- What is the typical supply current in no-load operation for the TEA1998TS/1H?
The typical supply current in no-load operation is below 250 µA.
- Can the TEA1998TS/1H generate its own supply voltage?
Yes, the TEA1998TS/1H can generate its own supply voltage, making it suitable for applications with low output voltage or for high-side rectification without an auxiliary winding.
- What types of SR MOSFETs does the TEA1998TS/1H support?
The TEA1998TS/1H supports both standard and logic level SR MOSFETs.
- What are some of the key features of the TEA1998TS/1H?
Key features include adaptive gate drive, low supply current, self-supplying capability, wide voltage range, and support for USB BC, QuickCharge, and smart charging applications.
- What is the package type of the TEA1998TS/1H?
The TEA1998TS/1H is packaged in a TSOP-6 (SC-74) package.
- What are the typical applications of the TEA1998TS/1H?
Typical applications include flyback power supplies, battery charging applications, high-side rectification, and USB/QuickCharge solutions.
- Does the TEA1998TS/1H have UnderVoltage LockOut (UVLO) protection?
Yes, the TEA1998TS/1H includes UVLO with active gate pull-down.
- How does the TEA1998TS/1H enhance efficiency in power supplies?
The TEA1998TS/1H enhances efficiency through adaptive gate drive, low supply current, and self-supplying capabilities, minimizing conduction losses and optimizing performance at any load condition.
