1.

General description

The TEA1731TS is a low cost Switched Mode Power Supply (SMPS) controller IC

intended for flyback topologies. The TEA1731TS 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 TEA1731TS IC features OverPower Protection (OPP). The controller accepts an

overpower situation for a limited amount of time.

One pin is reserved for protection purposes. OverTemperature Protection (OTP) can be

implemented with a minimal number of external components.

At low-power levels, the primary peak current is set to 25 % of the maximum peak current.

The switching frequency is reduced to limit the switching losses. The combination of fixed

frequency operation at high output power and frequency reduction at low output power

provides high efficiency over the total load range.

The TEA1731TS makes the design of low cost, highly efficient and reliable supplies for

power requirements up to 75 W easier by requiring a minimum number of external

components.

2.

Features and benefits

A typical)

low output power levels

TEA1731TS

GreenChip SMPS control IC

Rev. 2.1 — 16 August 2012

Product data sheet