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LD7921 - Primary-Side PWM Power Switch

Description

The LD7921 integrated a 700V power MOSFET and a primary-side feedback PWM controller with CV/CC operation in a SOP-6/DIP-7 package.

The LD7921 is designed for low power adapter/charger and LED lighting applications.

It minimizes the components counts and is available in tiny packages.

Features

  • OTP (Over Temperature Protection) and OVP (Over Voltage Protection) to prevent the circuit from being damaged under abnormal conditions. Features z Built-in 700V Power MOSFET z Primary-side Feedback Control z Constant Current Control z Built-in Load Regulation Compensation z Built-in Primary Winding Inductance Compensation z Low Startup Current (.

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Datasheet preview – LD7921

Datasheet Details

Part number LD7921
Manufacturer Leadtrend Technology
File Size 309.18 KB
Description Primary-Side PWM Power Switch
Datasheet download datasheet LD7921 Datasheet
Additional preview pages of the LD7921 datasheet.

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Full PDF Text Transcription

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LD7921 02/02/2012 Primary-Side PWM Power Switch with CV/CC Operation Ver. 00 General Description The LD7921 integrated a 700V power MOSFET and a primary-side feedback PWM controller with CV/CC operation in a SOP-6/DIP-7 package. The LD7921 is designed for low power adapter/charger and LED lighting applications. It minimizes the components counts and is available in tiny packages. Those make it an ideal design for low cost applications. The LD7921 provides constant voltage, constant current (CV/CC) operation requiring neither photo-coupler nor secondary control circuit. Also, the LD7921 features OTP (Over Temperature Protection) and OVP (Over Voltage Protection) to prevent the circuit from being damaged under abnormal conditions.
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