TEA1530AT

GreenChip^TMII SMPS control IC

General description

The GreenChip™II is the second generation of green Switched Mode Power Supply (SMPS) controller ICs. Its high level of integration allows the design of a cost effective power supply with a very low number of external components.

The TEA1530AT can be used in Fixed Frequency converter designs for low voltage, high current applications. At low power (standby) levels, the system operates in cycle skipping mode which minimizes the switching losses during standby.

The proprietary high voltage BCD800 process makes direct start-up possible from the rectified universal mains voltage in an effective and green way. A second low voltage BICMOS IC is used for accurate, high speed protection functions and control.

The TEA1530AT enables highly efficient and reliable supplies to be designed easily.

Features

Distinctive features

■ Universal mains supply operation (70 V to 276 V AC)

■ High level of integration, resulting in a very low external component count

■ Fixed frequency operation

Green features

■ Cycle skipping mode at very low loads; input power < 300 mW at no-load operation for a typical adapter application

■ On-chip start-up current source.

Protection features

■ Safe restart mode for system fault conditions

■ Undervoltage protection (foldback during overload)

■ IC OverTemperature Protection (OTP) (latched)

■ Low and adjustable OverCurrent Protection (OCP) trip level

■ Soft (re)start

■ Mains voltage-dependent operation-enabling level

■ General purpose input for latched or safe restart protection and timing, e.g. to be used for overvoltage protection (OVP), output short-circuit protection or system OTP.

Applications

■ Printer & LCD adapters / chargers / supplies. The device can however also be used in all applications that demand an efficient and cost-effective solution up to 65 W.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). All voltages are measured with respect to ground (pin 2); positive currents flow into the chip; pin VCC may not be current driven. The voltage ratings are valid provided other ratings are not violated; current ratings are valid provided the maximum power rating is not violated.

Block diagram

Typical configuration

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