TEA1501

GreenChip SMPS controller IC

1\. General description

The is the low power member of the GreenChip family and is especially designed for standby Switched Mode Power Supply SMPS applications. The TEA1501 incorporates all the necessary functions for an efficient and low cost power supply for 90 V to 276 V AC universal input. The TEA1501 is a monolithic integrated circuit and is available in a SO8 package. The design is made in the BCD_PowerLogic750 process and includes the high voltage switching device. Using only seven functional pins, the TEA1501 contains extensive control functions to form a flexible and a reliable power supply with a minimum of external components. The TEA1501 operates in a flyback topology see Figure3 with a fixed switching frequency, constant primary peak current control and regulates the output voltage in Burst mode.

2\. Features

2.1 Distinctive features

Direct off-line operation 90 V to 276 V AC

Low external component count

Integrated high voltage start-up current source for a fast start-up within 0.25 s

Integrated power switch: 650 V, 40Ω, 0.25 A

Programmable primary peak current

Data transfer from isolated secondary side to non-isolated primary side via the transformer

On/off function replaces expensive mains switch by a functional switch

2.2 Green features

Low current consumption in Off mode, typical 40µA

Efficient Burst mode operation, for 0.1 W to 3 W output power

2.3 Protection features

Cycle-by-cycle current control with programmable primary peak current

Overvoltage protection

Undervoltage lockout

Overtemperature protection