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LD7575 Datasheet

  • LD7575

  • ETC [Green-Mode PWM Controller with High-Voltage Start-Up C...

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LD7575
07/28/2005
Green-Mode PWM Controller with High-Voltage
Start-Up Circuit
Product Spec. (Confidential)
General Description
The LD7575 is a current-mode PWM controller with
excellent power-saving operation.
It features a high-
voltage 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.
Furthermore, the embedded over voltage protection, over
load 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 SOP-8 package.
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
Programmable Switching Frequency
Internal Slope Compensation
OVP (Over Voltage Protection) on Vcc
OLP (Over Load Protection)
500mA Driving Capability
Applications
Switching AC/DC Adapter and Battery Charger
Open Frame Switching Power Supply
LCD Monitor/TV Power
Patent pending
Typical Application
1
Leadtrend Technology Corporation
LD7575-DS-01-PROMATE July 2005

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