TEA1833TS/1H

IC FLYBACK SMPS CTLR 6TSOP

Overview

The TEA1833TS is a low-cost Switched Mode Power Supply SMPS controller IC intended for flyback topologies. The TEA1833TS 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 TEA1833TS IC features OverPower Protection OPP. The controller accepts an overpower situation up to 200 % for a limited amount of time.

Mains undervoltage protection brownin/brownout, output OverVoltage Protection OVP, and OverTemperature Protection OTP can be implemented using a minimal number of external components.

At low-power levels, the primary peak current is set to 22 % 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 TEA1833TS makes the design of low-cost, highly efficient and reliable supplies easier by requiring a minimum number of external components. The device is especially suited for medium power applications.

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## Features

* SMPS controller IC enabling low-cost applications

* Large input voltage range 10.5 V to 36 V

* Integrated OverVoltage Protection OVP on the VCC pin

* Accurate OverVoltage Protection OVP via the ISENSE pin

* Dedicated burst mode, allowing a low VCC capacitor value

* Very low supply current during start-up and restart 11 µA typical

* Low supply current during normal operation 0.58 mA typical without load

* Adaptive internal overpower time-out

* Overpower protection including high/low line compensation

* Fixed switching frequency with frequency jitter to reduce EMI

* Frequency reduction with fixed minimum peak current to maintain high efficiency at low output power levels

* Peak power operation up to 200 % by frequency increase and peak current increase

* Slope compensation for CCM operation

* Limitation of switching frequency at high mains to reduce the maximum drain voltage

* Integrated soft-start

* Drive capability 300 mA source, 750 mA sink

* Maximum duty cycle set at 90 %

* Mains undervoltage protection brownin/brownout

* Output Short Circuit Protection OSCP, avoiding transformer saturation

* External OverTemperature Protection OTP

* IC overtemperature protection

* Internal VCC OVP, external OVP, internal OTP, and external OTP are latched protections; all other protections cause a restart

## Target Applications

* All applications that require an efficient and cost-effective power supply solution. The TEA1833TS is especially suited for medium power applications.

## Features

* All applications that require an efficient and cost-effective power supply solution. The TEA1833TS is especially suited for medium power applications.