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LD7536R fiches techniques PDF

Leadtrend - Green-Mode PWM Controller

Numéro de référence LD7536R
Description Green-Mode PWM Controller
Fabricant Leadtrend 
Logo Leadtrend 





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LD7536R fiche technique
LD7536R
05/11/2010
Green-Mode PWM Controller with Frequency Swapping
and Integrated Protections
Rev. 00
General Description
The LD7536R 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
AC
input
EMI
Filter
OTP
VCC
OUT
COMP
LD7536R
CS
GND
DC
Output
photocoupler
Leadtrend Technology Corporation
LD7536R-DS-00 May 2010
1
www.leadtrend.com.tw

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