[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-562874-105":59,"doc-detail-562874-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","ld7575-ds-04b-green-mode-pwm-controller-with-high-voltage-start-up-circuit","LD7575 - DS-04b - Green-Mode PWM Controller with High-Voltage Start-Up Circuit","","LD7575 is a current-mode PWM controller designed for efficient AC/DC power applications, combining a high-voltage startup current source with a lossless startup circuit. It integrates leading-edge blanking on the CS pin, internal slope compensation, programmable switching frequency, and green-mode control for non-audible noise operation. The device provides UVLO, OVP on Vcc, and OLP protection, and supports SOP-8 and DIP-8 packages with 500 mA gate driving capability.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/ld7575-ds-04b-green-mode-pwm-controller-with-high-voltage-start-up-circuit/562874/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/ld7575-ds-04b-green-mode-pwm-controller-with-high-voltage-start-up-circuit/562874.png","ImageObject",300,407,{"name":92,"@type":93},"CatatanPagi","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-14","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is LD7575’s primary function and operating approach?","Question",{"text":112,"@type":113},"LD7575 is a current-mode PWM controller with a high-voltage startup circuit and integrated protections. It uses green-mode control to support efficient power conversion with non-audible noise operation.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the startup circuit work in LD7575?",{"text":117,"@type":113},"The HV pin connects to the positive terminal of the bulk capacitor to supply startup current. When Vcc reaches the UVLO(on) threshold, the HV startup loop turns off to reduce power loss.",{"name":119,"@type":110,"acceptedAnswer":120},"Which protection features are included in LD7575?",{"text":121,"@type":113},"LD7575 includes UVLO (under-voltage lockout), OVP (over-voltage protection) on Vcc, and OLP (over-load protection). It also uses leading-edge blanking on the CS pin and internal slope compensation for stable current-mode control.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},562874,1791885152,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},962090894170,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","LD7575  \n11/29/2007  \n\n| Green-Mode PWM Controller with High-Voltage\u003Cbr>Start-Up Circuit |  |\n| --- | --- |\n| REV: 04b\u003Cbr>General Description\u003Cbr>The LD7575 is a current-mode PWM controller with excellent power-saving operation. It features a highvoltage current source to directly supply the startup current from bulk capacitor and further to provide a lossless startup circuit. The integrated functions such as the leading-edge blanking of the current sensing, internal slope compensation, and the small package provide the users a high efficiency, minimum external component counts, and low cost solution for AC/DC power applications.\u003Cbr>Furthermore, the embedded over voltage protection, overload protection and the special green-mode control provide the solution for users to design a high performance power circuit easily. The LD7575 is offered in both SOP-8 and DIP-8 package. | Features\u003Cbr>z High-Voltage (500V) Startup Circuit\u003Cbr>z Current Mode Control\u003Cbr>z Non-Audible-Noise Green Mode Control\u003Cbr>z UVLO (Under Voltage Lockout)\u003Cbr>z LEB (Leading-Edge Blanking) on CS Pin\u003Cbr>z Programmable Switching Frequency\u003Cbr>z Internal Slope Compensation\u003Cbr>z OVP (Over Voltage Protection) on Vcc\u003Cbr>z OLP (Over Load Protection)\u003Cbr>z 500mA Driving Capability\u003Cbr>Applications\u003Cbr>z Switching AC/DC Adapter and Battery Charger\u003Cbr>z Open Frame Switching Power Supply\u003Cbr>z LCD Monitor/TV Power |\n| Typical Application\u003Cbr>|  |\n\n1  \nLeadtrend Technology Corporation [www.leadtrend.com.tw](www.leadtrend.com.tw)  \nLD7575-DS-04b November 2007  \nLD7575  \n\n| Pin Configuration\u003Cbr>SOP-8 & DIP-8 (TOP VIEW)\u003Cbr>\u003Cbr>YY: Year code\u003Cbr>WW: Week code\u003Cbr>PP: Production code\u003Cbr>HV\u003Cbr>NC\u003Cbr>VCC\u003Cbr>OUT\u003Cbr>RT\u003Cbr>COMP\u003Cbr>CS\u003Cbr>GND |\n| --- |\n| Ordering Information\u003Cbr>Part number Package Top Mark Shipping LD7575 PS SOP-8 PB Free LD7575PS 2500 /tape & reel LD7575 GS SOP-8 Green Package LD7575GS 2500 /tape & reel LD7575 PN DIP-8 PB Free LD7575PN 3600 /tube /Carton\u003Cbr>The LD7575 is ROHS compliant/ Green Package.\u003Cbr>Pin Descriptions\u003Cbr>PIN NAME FUNCTION 1 RT This pin will program the switching frequency, to connect a resistor with ground to set the switching frequency. 2 COMP Voltage feedback pin (same as the COMP pin in UC384X), By connecting a photo-coupler to close the control loop and achieve the regulation. 3 CS Current sense pin, connect to sense the MOSFET current 4 GND Ground 5 OUT Gate drive output to drive the external MOSFET 6 VCC Supply voltage pin 7 NC Unconnected Pin 8 HV Connect this pin to positive terminal of bulk capacitor to provide the startup current for the controller. When Vcc voltage trips the UVLO(on), this HV loop will be off to save the power loss on the startup circuit. |\n\n2  \nLeadtrend Technology Corporation [www.leadtrend.com.tw](www.leadtrend.com.tw)  \nLD7575-DS-04b November 2007  \nLD7575  \n\n| Block Diagram |  |  |\n| --- | --- | --- |\n| RT\u003Cbr>COMP\u003Cbr>CS | HV\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>Green-Mode Control\u003Cbr>\u003Cbr>5.0V \u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>GND | VCC\u003Cbr>OUT |\n\n3  \nLeadtrend Technology Corporation [www.leadtrend.com.tw](www.leadtrend.com.tw)  \nLD7575-DS-04b November 2007  \nLD7575  \nAbsolute Maximum Ratings  \nSupply Voltage VCC 30V  \nHigh-Voltage Pin, HV -0.3V~500V COMP, RT, CS -0.3 ~7V Junction Temperature 150°C Operating Ambient Temperature  -40°C to 85°C Storage Temperature Range -65°C to 150°C Package Thermal Resistance (SOP-8)  160°C/W  \nPackage Thermal Resistance (DIP-8)  100°C/W Power Dissipation (SOP-8, at Ambient Temperature = 85°C)  400mW  \nPower Dissipation (DIP-8, at Ambient Temperature = 85°C)  650mW Lead temperature (Soldering, 10sec)  260°CESD Voltage Protection, Human Body Model (except HV Pin) 3KVESD Voltage Protection, Machine Model 200V Gate Output Current 500mA  \nCaution:  \nStresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specifi","cbCailh2ctKi958d","https://ap.wps.com/l/cbCailh2ctKi958d","pdf",308225,18,"English","# General Description\n## Features\n## Applications\n## Pin Configuration and Descriptions\n## Typical Application\n## Block Diagram\n## Absolute Maximum Ratings\n## Recommended Operating Conditions\n## Electrical Characteristics","[{\"question\":\"What is LD7575’s primary function and operating approach?\",\"answer\":\"LD7575 is a current-mode PWM controller with a high-voltage startup circuit and integrated protections. It uses green-mode control to support efficient power conversion with non-audible noise operation.\"},{\"question\":\"How does the startup circuit work in LD7575?\",\"answer\":\"The HV pin connects to the positive terminal of the bulk capacitor to supply startup current. When Vcc reaches the UVLO(on) threshold, the HV startup loop turns off to reduce power loss.\"},{\"question\":\"Which protection features are included in LD7575?\",\"answer\":\"LD7575 includes UVLO (under-voltage lockout), OVP (over-voltage protection) on Vcc, and OLP (over-load protection). It also uses leading-edge blanking on the CS pin and internal slope compensation for stable current-mode control.\"}]","LD7575 - DS-04b - Green-Mode PWM Controller with High-Voltage Start-Up Circuit | PDF",1791809957,45]