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LD7577GN fiches techniques PDF

Leadtrend - High Voltage Green-Mode PWM Controller

Numéro de référence LD7577GN
Description High Voltage Green-Mode PWM Controller
Fabricant Leadtrend 
Logo Leadtrend 





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LD7577GN fiche technique
LD7577
1/15/2009
High Voltage Green-Mode PWM Controller with
Brown-Out Protection
Rev. 01
General Description
The LD7577 integrates several functions of protections, and
EMI-improved solution in SOP-8 package. It minimizes 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, it features more protections like OLP (Over Load
Protection), OVP (Over Voltage Protection), and brownout
protection to prevent the circuit from being damaged under
abnormal conditions.
Features
z High-Voltage (500V) Startup Circuit
z Current Mode Control
z Non-Audible-Noise Green Mode Control
z UVLO (Under Voltage Lockout)
z LEB (Leading-Edge Blanking) on CS Pin
z Internal Slope Compensation
z OVP (Over Voltage Protection) on Vcc Pin
z AC Input OVP (Over Voltage Protection)
z OLP (Over Load Protection)
z Precision Brownout Protection
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
AC EMI
input Filter
*
HV VCC OUT
BNO
LD7577
CS
GND COMP
*
*See Application Information
Leadtrend Technology Corporation
LD7577-DS-01 January 2009
1
www.leadtrend.com.tw
photocoupler
TL431

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