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Date: 21-03-13

Switching power controller chipset for mobile chargers upto 10W saves BOM cost

NXP has launched new power IC chipset for designing mobile device (both phone and tablet) chargers. The chipset consists of TEA1720A, a primary sensing SMPS (switched mode power supply) controller driving an external bipolar transistor and TEA1705, a secondary-side transient controller IC. The power supply architecture uses the secondary side (TEA1705) for load-step detection, generating wake-up interrupts to the primary side (TEA1720A) in burst mode. Together, the TEA1720A and TEA1705 deliver a fast transient response of 5V ±5%.

“As smartphone and tablet users, we all know that chargers need to be compact and that faster battery charging can make a world of difference when you’re constantly on the move. The GreenChip TEA1720A and TEA1705 deliver on this vision, while also minimizing power consumption when the charger is on standby,” said Marcel van Roosmalen, general manager, power solutions product line, NXP Semiconductors. “From a manufacturer’s point of view, we’re offering an elegant, highly integrated solution that reduces the number of external components required, for higher efficiency, higher power density, significant cost savings, and robust performance. With more than one billion GreenChip power ICs shipped today – and proven success in chargers, adapters and power supplies across a broad range of applications – this latest generation of GreenChip ICs for smartphones and media tablets is an important addition which should help to accelerate the next billionth milestone.”

TEA1720A and TEA1705 controllers are compliant to the USB battery charging specification and ENERGY STAR 2.0 and new US Department of Energy efficiency standards going into effect in 2014. The TEA1720A includes integrated high-voltage (HV) start-up for fast start-up time (

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