LD7577JA PDF – High Voltage Green-Mode PWM Controller

Part Number: LD7577JA

Function: High Voltage Green-Mode PWM Controller

Package: SOP-7, SOP-8 or DIP-8 Type

Manufacturer: Leadtrend


2 page


The LD7577JA integrated several functions of protections, and EMI-improved solution in a SOP-7, SOP-8/or DIP-8 package. It minimizes the component counts and the circuit space, and it’s perfect for the low cost of applications.

It provides functions of low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. Also, the device features more protections like OLP (Over Load Protection), OVP (Over Voltage Protection), and brownout protection to prevent the circuit being damaged from the abnormal conditions.



1. High-Voltage (500V) Startup Circuit

2. Current Mode Control

3. Non-Audible-Noise Green Mode Control

4. UVLO (Under Voltage Lockout)

5. LEB (Leading-Edge Blanking) on CS Pin   [ … ]

3 page


1. Switching AC/DC Adaptor and Battery Charger

2. Open Frame Switching Power Supply

3. LCD Monitor/TV Power

LD7577JA Datasheet