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Leadtrend Technology - PWM Current Mode Controller

Numéro de référence LD7580AGS
Description PWM Current Mode Controller
Fabricant Leadtrend Technology 
Logo Leadtrend Technology 





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LD7580AGS fiche technique
LD7580A
9/5/2012
PWM Current Mode Controller with
Quasi-Resonant Operation
REV00
General Description
The LD7580A is a current mode PWM controller and
features quasi resonant operation. It operates in DCM at
light load to optimize the efficiency and operates in
boundary condition at high power level.
The LD7580A is integrated with high voltage startup
circuit, green-mode power-saving operation, and
leading-edge blanking of the current sensing. It also
incorporates with several protections like OLP (Over Load
Protection), OVP (Over Voltage Protection), OTP (Over
Temperature Protection) …etc. Highly integration and tiny
package make it an ideal choice in wide variety of
applications, and in addition to minimize the component
counts and the circuit space.
In capable of performing boundary operation, it can
reduce the switching loss and the reverses recovery loss
of rectify diode when the MOSFET turns on. It is designed
to meet the latest power saving regulations for wide input
voltage range of applications.
Features
High-Voltage (500V) Startup Circuit
Current Mode Control
Minimum Drain Voltage Switching
Green Mode Control at Light Load
UVLO (Under Voltage Lockout)
LEB (Leading-Edge Blanking) on CS Pin
Over Voltage Comparator on VCC and QRD Pin
OLP (Over Load Protection)
Internal Over Temperature Shutdown
+500/-700mA Driving Capability
Applications
Switching AC/DC Adaptor
Open Frame Switching Power Supply
LCD Monitor/TV Power Supply
Leadtrend Technology Corporation
LD7850A-DS-00 September 2012
1
www.leadtrend.com.tw

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