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The TEA2095TE/1Y is a new synchronous rectifier (SR) controller IC for switch mode power supplies. It uses an adaptive gate drive method to achieve maximum efficiency under any load condition. The SR controller IC is a dedicated controller IC for synchronous rectification of the secondary side of a resonant converter, and it has two driver stages to drive SRMOSFETs to rectify the output of the centre-tap secondary transformer winding. The two gate drive stages have their own sense inputs and can operate independently. They are optimised to operate efficiently with low-impedance MOSFETs and switch at high frequencies. Manufactured using the silicon-on-insulator (SOI) process.

Characteristics

● Efficiency characteristics

● Adaptive gate drive for maximum efficiency at any load

● 90μA supply current in power-saving mode (typical)

● -25mV regulated level for driving low-resistance MOSFETs

● Application features

● Wide supply voltage range: 4.5V to 38.0V

● Dual synchronous rectification for LLC resonance

● Supports 5.0V operating voltage with logic level SR MOSFETs

● Differential inputs for detecting the drain-source voltage of each synchronous rectifier MOSFET

● Two package versions: SO-8 and SO-8 with exposed die pads

● Output capacitor discharge when power is disconnected

● Control characteristics

● SR control, no minimum on-time

● Adaptive gate drive for fast shutdown at end of conduction

● Undervoltage lockout (UVLO) protection with active gate pull-down function

● Interlock function to prevent external MOSFETs from conduction at the same time

● Supports 1.0 MHz switching frequency

Applications

● Adapters

● Desktop and all-in-one computer power supplies

● Server power supplies

● Switch-mode power supplies

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