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Leadtrend - Green-Mode PWM Controller

Numéro de référence LD7536
Description Green-Mode PWM Controller
Fabricant Leadtrend 
Logo Leadtrend 





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LD7536 fiche technique
LD7536
12/15/2011
Green-Mode PWM Controller with Frequency Swapping
and Integrated Protections
Rev. 02a
General Description
The LD7536 is built-in with several functions, protection
and EMI-improved solution in a tiny package. It takes less
components counts or circuit space, especially ideal for
those total solutions of low cost.
The implemented functions include low startup current,
green-mode power-saving operation, leading-edge
blanking of the current sensing and internal slope
compensation. It also features more protections like
OLP (Over Load Protection) and OVP (Over Voltage
Protection) to prevent circuit damage occurred under
abnormal conditions.
Furthermore, the Frequency Swapping function is to
reduce the noise level and thus helps the power circuit
designers to easily deal with the EMI filter design by
spending minimum amount of component cost and
developing time.
Features
z High-Voltage CMOS Process with Excellent ESD
protection
z Very Low Startup Current (<20μA)
z Current Mode Control
z Green Mode Control
z UVLO (Under Voltage Lockout)
z LEB (Leading-Edge Blanking) on CS Pin
z Internal Frequency Swapping
z Internal Slope Compensation
z OVP (Over Voltage Protection) on Vcc Pin
z OTP (Over Temperature Protection) through a NTC
z OLP (Over Load Protection)
z 300mA Driving Capability
Applications
z Switching AC/DC Adaptor and Battery Charger
z Open Frame Switching Power Supply
Typical Application
Leadtrend Technology Corporation
LD7536-DS-02a December 2011
1
www.leadtrend.com.tw

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