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UM10758 Dataheets PDF



Part Number UM10758
Manufacturers NXP
Logo NXP
Description 65W notebook adapter
Datasheet UM10758 DatasheetUM10758 Datasheet (PDF)

UM10758 TEA1836DB1094 TEA1836XT + TEA1792T 65 W notebook adapter Rev. 1 — 4 December 2013 User manual Document information Info Keywords Content TEA1836DB1094, TEA1836XT, very low standby power consumption, high peak power, active X-cap discharge, burst mode operation, flyback converter, 65 W, notebook adapter, controller, converter, power supply, demo board TheTEA1836XT is a high-featured low-cost DCM/QR flyback converter controller. It provides high efficiency at all power levels including ve.

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UM10758 TEA1836DB1094 TEA1836XT + TEA1792T 65 W notebook adapter Rev. 1 — 4 December 2013 User manual Document information Info Keywords Content TEA1836DB1094, TEA1836XT, very low standby power consumption, high peak power, active X-cap discharge, burst mode operation, flyback converter, 65 W, notebook adapter, controller, converter, power supply, demo board TheTEA1836XT is a high-featured low-cost DCM/QR flyback converter controller. It provides high efficiency at all power levels including very low no-load power consumption at nominal output voltage in burst mode operation. To minimize the risk of audible noise, burst mode operation is included for the low load range. Switching in the audible frequency range is limited and peak currents are low. The TEA1836XT is intended for power supplies up to 75 W with extra high peak power capabilities to enable supplying high peak power equipment without requiring a PFC. This document describes the 65 W notebook adapter demo board with the TEA1836XT and TEA1792TS. The demo board provides an output of 19.5 V/3.34 A. The average efficiency is above 91 % and the no-load power consumption is below 30 mW. Abstract http://www.Datasheet4U.com NXP Semiconductors UM10758 TEA1836DB1094 TEA1836 + TEA1792 65 W notebook adapter Revision history Rev v.1 Date 20131204 Description first issue Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] UM10758 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. User manual Rev. 1 — 4 December 2013 2 of 28 NXP Semiconductors UM10758 TEA1836DB1094 TEA1836 + TEA1792 65 W notebook adapter 1. Introduction WARNING Lethal voltage and fire ignition hazard The non-insulated high voltages that are present when operating this product, constitute a risk of electric shock, personal injury, death and/or ignition of fire. This product is intended for evaluation purposes only. It shall be operated in a designated test area by personnel qualified according to local requirements and labor laws to work with non-insulated mains voltages and high-voltage circuits. This product shall never be operated unattended. 1.1 Scope of this document This document describes the 65 W notebook adapter TEA1836DB1094 demo board using the TEA18361T and TEA1792TS. It contains a set of measurements that shows the main characteristics. 1.2 TEA1836XT The TEA1836XT is a controller IC for low-cost Switched Mode Power Supplies (SMPS) intended for flyback topologies. The built-in green functions provide high efficiency at all power levels. At high power levels the flyback operates in QR mode. When lowering the power levels, the controller switches to DCM or Frequency Reduction (FR) mode. The peak current is reduced to 25 % of the maximum peak current. At low power levels, when the flyback switching frequency reaches 25 kHz, the flyback converter switches to burst mode. To ensure high efficiency at low power and excellent no-load power performance, a burst mode has been integrated that reduces the optocurrent to a minimum level. As the switching frequency in this mode has a minimum value of 25 kHz while the burst frequency is always below 800 Hz, the frequencies are outside the audible range. During the non-switching phase of the burst mode, the internal IC supply current is reduced to further optimize efficiency. Valley switching is used in all operating modes. The TEA1836XT includes an OverPower Protection (OPP). The OPP enables the controller to deliver 150 % peak power for a limited amount of time (200 ms) in case of overpower situations. If the output is shorted, the output power is limited to 100 % to keep the average power consumption lower than 5 W. The TEA1836XT is realized in a high-voltage SOI (Silicon-On-Insulator) process. This process combines the advantages of a low-voltage process, like accuracy, high-speed protection functions, and control, while maintaining the high-voltage capabilities like high-voltage start-up and integrated X-cap discharge. The TEA1836XT enables low-cost, highly efficient and reliable supplies for power requirements up to 75 W to be designed easily and with a minimum number of external components. UM10758 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. User manual Rev. 1 — 4 December 2013 3 of 28 NXP Semiconductors UM10758 TEA1836DB1094 TEA1836 + TEA1792 65 W notebook adapter 1.3 TEA1792TS The TEA1792TS is a member of the generation of Synchronous Rectifier (SR) controller ICs for switched mode power supplies. Its high level of integration enables the design of a cost-effective power supply with a very low number of external components. The TEA1792TS is a controller IC dedicated to synchronous rectification on the secondary side of discontinuous conduction mode and quasi-resonant flyback converters 1.4 S.


3329 UM10758 AO4486


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