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LD7576 Datasheet(PDF) 1 Page - Leadtrend Technology |
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LD7576 Datasheet(HTML) 1 Page - Leadtrend Technology |
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1 / 22 page  LD7576/76H/76J/76K 12/9/2009 1 Leadtrend Technology Corporation www.leadtrend.com.tw LD7576-DS-04a December 2009 Green-Mode PWM Controller with High-Voltage Start-Up Circuit and Adjustable OLP Delay Time REV. 04a General Description The LD7576X series brings high performance, and combines highly integrated functions, protections and EMI-improve solution. It’s an ideal solution for those cost-sensitive systems, reducing component count and overall system cost. The LD7576X series features near-lossless high voltage startup circuit, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. They are also equipped with protections, such as OLP (Over Load Protection), OVP (Over Voltage Protection) and OTP (Over Temperature Protection), to prevent circuit damage under abnormal conditions. The LD7576X series is available in DIP-8 and SOP-8, SOP-7 packages. Features High-Voltage (500V) Startup Circuit Current Mode Control Non-Audible-Noise Green Mode Control UVLO (Under Voltage Lockout) LEB (Leading-Edge Blanking) on CS Pin Internal Slope Compensation OVP (Over Voltage Protection) on Vcc On-Chip OTP (Over Temperature Protection) OLP (Over Load Protection) Latch Mode Protection by CT pin 500mA Driving Capability Adjustable OLP delay time Applications Switching AC/DC Adaptor and Battery Charger Open Frame Switching Power Supply LCD Monitor/TV Power Typical Application EMI Filter CT OUT CS VCC GND COMP LD7576X photocoupler AC input TL431 HV * * * See Application Information |
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