NXP GreenChip X-capacitor discharge IC TEA1708 Enable extreme low standby power using NXP’s rugged automatic X-capacitor discharge IC Equipped with a high-voltage (500 V) clamp, this device withstands surges of more than 6 kV, requires only one low-voltage capacitor, and consumes less than 1 mW at 230 Vac. KEY FEATURES `` Integrated 500 V clamp `` Withstands >6 kV mains surges with R1 = R2 = 200 kΩ See TEA1708 application diagram `` As little as 1 mW power consumption at 230 Vac `` Supply current of 4 µA `` Adjustable AC removal detection time `` Requires only one external low-voltage capacitor `` ~2.3 mA discharge current (internally limited) APPLICATIONS `` AC-connected power supplies with X capacitors above 100 nF that require very low no-load standby power The NXP TEA1708 is rugged for surges, consumes very little power and, because it reduces component count, enables a very compact design. In typical configurations, the TEA1708 is connected across the X-capacitor via two resistors. The TEA1708 integrates a highvoltage clamping circuit, so there is no need for a Metal Oxide Varistor (MOV) to protect the X-capacitor discharge IC. The high-voltage diodes connected to the L & N of a typical active X-cap discharge solution are not needed using the TEA1708, resulting in a lower BOM and fewer external components. In surge tests, the TEA1708 delivers robust performance, withstanding a mains surge voltage in excess of 6 kV when connected via two resistors R1 and R2 of 200 kΩ. The X-capacitor discharge current is internally limited to ~2.3 mA. The discharge delay time is set externally by a low-voltage capacitor. TEA1708 application diagram www.nxp.com © 2013 NXP Semiconductors N.V. All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The Date of release: November 2013 information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and Document order number: 9397 750 17464 may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof Printed in the Netherlands does not convey nor imply any license under patent- or other industrial or intellectual property rights.