通嘉ExternalAdapter应用对策-2008-2.pptVIP

Intel NB requests for higher efficiency Energy Standard before and now 7 Major power losses at no load Loss Analysis (1) e.g. 48V 0.2W Loss Analysis (2) e.g. 0.07W 4 points avg. losses – before modification 4 points losses – after modification Performance Analysis (A) Performance Analysis (B) The lower operation frequency, the less core loss. The lower Snubber capacitance, the higher efficiency. Performance Analysis (C) Features- LD7575 Pi 0.1W, best choice for 2008 EPA requirement Pin compatible with XXX1203/7 High Voltage Start-Up Time 1 Sec. For Capacitance load. Reduce Input Power while output short protection Block Diagram- LD7575 Schematic- LD7575 Features- LD7576 Features all LD7575 function EMI enhanced less System cost CT for OLP delay OLP Delay Time Programmable Soft-Start/ Latch OFF Latch Mode Protection at CT pin Revolutionary Feedback Design Schematic Diagram LD7510 Function Block Diagram External OVP Adjustment * Leadtrend Technology Corp Green your power , Green the world An Energy-Saving IC Design Company All Rights Reserved Solutions for External Adapter FLYBACK in various Applications Total Shipment for LCD Monitor: 40% Adaptor: 60% Energy Standard/ 2008 Power saving 0.3W Efficiency 87% LD solution = Energy Saving +High Efficiency Energy Standard update since July ‘08 48V Hi V, Pi0.3W 5V Lo V, Eff87% Challenge Between 36 ~49W Energy Standard - Europe 2008 ADSL Customers’ request since 2008 Start-up time less than 1 sec, and Power saving below 0.1W LD7575 is the solution A short Start up time of 1 sec has to be realized to guarantee triple-play functions like VoIP and Video over IP (while the current value for this start up time is around 3 seconds). This equipment comes into effect from 1.1.2008. 0.2 Watt 0.3 Watt VDSL port 0.1 Watt 0.3 Watt ADSL port Tier 2: 1.1.-31.12.2008 Tier 1: 1.1. -31.2007 Equipment Efficiency at light load (1W~2.4W) should reach up to 65%. Energy Star before and now New Standard: Eff. down from