Overview
The TEA1995T/1J, produced by NXP USA Inc., is a dedicated controller IC for synchronous rectification on the secondary side of resonant converters. It is part of a new generation of Synchronous Rectifier (SR) controller ICs designed for switched mode power supplies. This IC incorporates an adaptive gate drive method to ensure maximum efficiency at any load condition. Fabricated using a Silicon-On-Insulator (SOI) process, the TEA1995T/1J is optimized for high-efficiency applications in various power supply configurations.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 38 | V | ||
| Start Voltage (Vstart) | 4.35 | 4.55 | 4.75 | V | |
| Stop Voltage (Vstop) | 4.0 | 4.2 | 4.4 | V | |
| Operating Supply Current (ICC(oper)) | Normal operation (without gate charge) | 0.9 | 1.1 | 1.3 | mA |
| Energy-Save Mode Current | 140 | 160 | 180 | μA | |
| Gate Pull-Down Resistance (Rpd(G)) | VDSA/VDSB = 4 V; IGDA/IGDB = 30 mA; VCC = 12 V | 3.2 | 4 | 5 | Ω |
| Thermal Resistance (Rth(j-a)) | JEDEC test board | 140 | K/W | ||
| Storage Temperature (Tstg) | -55 | 150 | °C | ||
| Junction Temperature (Tj) | -40 | 150 | °C |
Key Features
- Adaptive Gate Drive: Ensures maximum efficiency at any load condition.
- Low Supply Current: Energy-save operation current below 200 μA.
- Wide Supply Voltage Range: Operates from 4.5 V to 38 V.
- Dual Synchronous Rectification: Supports LLC resonant and multi-output flyback converters.
- Independent Gate Driver Stages: Each stage has its own sensing inputs.
- UnderVoltage LockOut (UVLO) Protection: With active gate pull-down.
- SOI Fabrication: Silicon-On-Insulator process for enhanced performance.
- Differential Inputs: For sensing the drain and source voltages of each SR MOSFET.
Applications
The TEA1995T/1J is designed for use in various high-efficiency power supply applications, including:
- Resonant Power Supplies: Drives two external synchronous rectifier MOSFETs for rectification of voltages on secondary transformer windings.
- Adapters: Suitable for high-efficiency adapter designs.
- Desktop and All-in-One PC Power Supplies: Enhances efficiency in computer power supplies.
- Multi-Output Flyback Converters: Supports SR MOSFETs placed at the low side.
Q & A
- What is the primary function of the TEA1995T/1J?
The TEA1995T/1J is a dedicated controller IC for synchronous rectification on the secondary side of resonant converters.
- What is the supply voltage range of the TEA1995T/1J?
The supply voltage range is from 4.5 V to 38 V.
- What is the adaptive gate drive feature?
The adaptive gate drive feature ensures maximum efficiency at any load condition.
- What type of fabrication process is used for the TEA1995T/1J?
The TEA1995T/1J is fabricated using a Silicon-On-Insulator (SOI) process.
- What protection features does the TEA1995T/1J have?
The IC includes UnderVoltage LockOut (UVLO) protection with active gate pull-down.
- Can the TEA1995T/1J be used in multi-output flyback converters?
Yes, it supports SR MOSFETs placed at the low side in multi-output flyback converters.
- What is the typical operating supply current of the TEA1995T/1J?
The typical operating supply current is 1.1 mA.
- What is the energy-save mode current of the TEA1995T/1J?
The energy-save mode current is below 200 μA.
- What is the thermal resistance from junction to ambient for the TEA1995T/1J?
The thermal resistance from junction to ambient is typically 140 K/W on a JEDEC test board.
- What are the storage and junction temperature ranges for the TEA1995T/1J?
The storage temperature range is -55°C to 150°C, and the junction temperature range is -40°C to 150°C.
