Features
High-Voltage (500V) Startup Circuit
Current Mode Control
Green Mode Control
UVLO (Under Voltage Lockout)
LEB (Leading-Edge Blanking) on CS Pin
Internal Frequency Swapping
Internal Slope Compensation
Internal Over Current Protection
OVP (Over Voltage Protection) on Vcc
OLP (Over Load Protection)
External OTP through a NTC
500mA Driving Capability

Applications
Switching AC/DC Adaptor and Battery Charger
Open Frame Switching Power Supply
LCD Monitor/TV Power

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.