High Voltage Green-Mode PWM Controller
LD7750R
05/12/2010
High Voltage Green-Mode PWM Controller with
Over Temperature Protection
Rev. 00
General Descriptio...
Description
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
Pin Configuration
SOP-7 (TOP VIEW)
SOP-8 /DIP-8 (TOP VIEW)
LD7750R
HV VCC OUT HV NC VC C OUT
8
65
TOP MARK YYWWPP
1 234
8 765
TOP MA...
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