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Leadtrend - High Voltage Green-Mode PWM Controller

Numéro de référence LD7750RGN
Description High Voltage Green-Mode PWM Controller
Fabricant Leadtrend 
Logo Leadtrend 





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LD7750RGN fiche technique
LD7750R
05/12/2010
High Voltage Green-Mode PWM Controller with
Over Temperature Protection
Rev. 00
General Description
The LD7750R integrates several functions of protections,
and EMI-improved solution in a SOP-7, SOP-8 or DIP-8
package to minimize the component counts and the circuit
space.
The device provides functions of low startup current,
green-mode power-saving operation, leading-edge
blanking of the current sensing and internal slope
compensation. Also, the LD7750R features more
protections like OLP (Over Load Protection), OVP (Over
Voltage Protection), and OTP (Over Temperature
Protection) to prevent the circuit being damaged under the
abnormal conditions. The LD7750R features built-in
auto-recovery function for OVP on Vcc pin and OLP.
Features
z High-Voltage (500V) Startup Circuit
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 Internal Over Current Protection
z OVP (Over Voltage Protection) on Vcc
z OLP (Over Load Protection)
z External OTP through a NTC
z 500mA Driving Capability
Applications
z Switching AC/DC Adaptor and Battery Charger
z Open Frame Switching Power Supply
z LCD Monitor/TV Power
Typical Application
Leadtrend Technology Corporation
LD7750R-DS-00 May 2010
1
www.leadtrend.com.tw

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