General description

The TEA1738FT is a low cost Switched Mode Power Supply (SMPS) controller IC intended for flyback topologies. It operates in peak current and frequency control mode. Frequency jitter has been implemented to reduce ElectroMagnetic Interference (EMI). Slope compensation is integrated for Continuous Conduction Mode (CCM) operation. The TEA1738FT IC includes OverPower Protection (OPP). This enables the controller to operate under overpower situations for a limited amount of time. Two pins, VINSENSE and PROTECT, are reserved for protection purposes. Input UnderVoltage Protection (UVP), ouput OverVoltage Protection (OVP) and OverTemperature Protection (OTP) can be implemented using a minimal number of external components.

Features

SMPS controller IC enabling low-cost applications

Large input voltage range (12 V to 30 V)

Integrated OverVoltage Protection on pin VCC

Very low supply current during start-up and restart (10 A typical)

Low start-up voltage (13.2 V typical)

Low supply current during normal operation (0.55 mA typical no load)

Overpower or high/low line compensation

Adjustable overpower time-out

Adjustable overpower restart timer

Fixed switching frequency with frequency jitter to reduce EMI

Frequency reduction at medium power operation to maintain high efficiency

Frequency reduction with fixed minimum peak current at low power operation tomaintain high efficiency at low output power levels

Frequency increase at peak power operation

Slope compensation for CCM operation

Low and adjustable OverCurrent Protection (OCP) trip level

Adjustable soft start

Two protection inputs (e.g. for input UVP and OTP)

IC overtemperature protection

Applications

All applications requiring efficient and cost-effective power supply solutions up to 75 W.