NXP today announced the launch of GreenChip TEA1733(L) – a low-cost IC that increases energy efficiency and standby performance of power supplies under 75W. Designed specifically for low-power computing and communication applications such as netbook adapters, printer adapter and LCD monitor supplies, the TEA1733 is a Switched Mode Power Supply (SMPS) controller IC that enables standby power levels less than 100mW. The GreenChip TEA1733 is the first of a complete series of low-power AC/DC control ICs to be launched by NXP over the next year.

To enable higher efficiencies at low standby mode and at all load levels, the TEA1733 requires a very low start-up current of 10µA and consumes a low supply current of 1.25mA. 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. Due to its high level of integration, the TEA1733 enables a compact and lighter power supply design with reduced number of external components in the SMPS. The TEA1733 is available in a safe restart protection version as TEA1733 and also in a latched protection version as TEA1733(L).

With almost 500 million GreenChips already sold, NXP Semiconductors is at the forefront of designing and manufacturing energy efficient solutions for the power supply industry. The GreenChip family makes it easier and more cost-effective for power supply manufacturers to comply with energy efficiency specifications such as 80PLUS® and ENERGY STAR®. The GreenChip family of ICs is designed specifically for energy saving and has, from its inception, led industry standards in PC power efficiency especially in notebook power efficiency.

Technical Information
Key features of the GreenChip TEA1733 SMPS controller IC for low-power applications include:

Large input voltage range (12 V to 30 V)
Very low supply current during start-up and restart (typically 10µA)
Low supply current during normal operation (typically 0.5 mA without 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 with fixed minimum peak current at low power operation to
maintain high efficiency at low output power levels
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 OVP, OTP and output OVP)
IC overtemperature protection

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