Overview
The TEA1761T/N2,118 is a synchronous rectifier controller IC developed by NXP USA Inc. It is part of the GreenChip family, designed for use in switched-mode power supplies, particularly on the secondary side of discontinuous conduction mode and quasi-resonant flyback converters. This IC integrates both synchronous rectification and primary feedback control functionality, enabling the design of cost-effective power supplies with a minimal number of external components. Fabricated using NXP's Silicon On Insulator (SOI) process, the TEA1761T offers a wide range of operational capabilities and high thermal performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 8.6 | - | 38 | V |
| Start-up Voltage (Vstartup) | 8.35 | 8.6 | 8.85 | V |
| Operating Supply Current (ICC(oper)) | - | 1.4 | - | mA |
| Driver Activation Voltage (Vact(drv)) | -340 | -310 | -280 | mV |
| Driver Regulation Voltage (Vreg(drv)) | -65 | -55 | -45 | mV |
| Driver Deactivation Voltage (Vdeact(drv)) | -12 | - | - | mV |
| Maximum Output Voltage (Vo(max)) | - | - | 12 | V |
| Operating Temperature | -20 | - | 150 | °C |
| Package Type | - | - | SO-8 (8 leads, 3.9 mm width) | - |
Key Features
- Combined synchronous rectification and primary feedback control functionality.
- Wide supply voltage range (8.6 V to 38 V).
- High level of integration, resulting in a very low external component count.
- Wide opto coupler output voltage range (3.5 V to 38 V).
- Accurate internal voltage reference for voltage control (within 1%).
- Low thermal resistance due to SOI process.
Applications
The TEA1761T/N2,118 is primarily used as a secondary-side synchronous rectifier controller in switched-mode power supplies, particularly in discontinuous conduction mode and quasi-resonant flyback converters. It is suitable for various power supply applications requiring high efficiency and minimal component count.
Q & A
- What is the primary function of the TEA1761T/N2,118?
The primary function is to control synchronous rectification and provide primary feedback control in switched-mode power supplies. - What is the supply voltage range for the TEA1761T/N2,118?
The supply voltage range is from 8.6 V to 38 V. - What type of process is used to fabricate the TEA1761T/N2,118?
The IC is fabricated using NXP's Silicon On Insulator (SOI) process. - What is the typical operating supply current for the TEA1761T/N2,118?
The typical operating supply current is 1.4 mA. - What is the maximum output voltage for the driver?
The maximum output voltage for the driver is 12 V. - What is the operating temperature range for the TEA1761T/N2,118?
The operating temperature range is from -20°C to 150°C. - What type of package does the TEA1761T/N2,118 come in?
The IC comes in an SO-8 package with 8 leads and a body width of 3.9 mm. - What are the key benefits of using the TEA1761T/N2,118?
The key benefits include high integration, low external component count, wide supply voltage range, and accurate internal voltage reference. - Where is the TEA1761T/N2,118 typically used?
It is typically used in the secondary side of discontinuous conduction mode and quasi-resonant flyback converters. - What is the thermal resistance of the TEA1761T/N2,118?
The thermal resistance from junction to ambient in free air is 150 K/W.
