Datasheet4U Logo Datasheet4U.com

LD5521 - Quasi-Resonant PWM Flyback Controller

Datasheet Summary

Description

The LD5521 integrate a quasi-resonant PWM control function into a SOT-26 package.

It takes less components counts or circuit space, especially ideal for those total solutions of low cost.

Features

  • more protections like OLP (Over Load Protection) and OVP (Over Voltage Protection) to prevent circuit damage occurred under abnormal conditions. Furthermore, the QR jitter function could reduce the noise level and thus helps the power circuit designers to easily deal with the EMI filter by spending minimum amount of component cost and developing time. Typical.

📥 Download Datasheet

Datasheet preview – LD5521

Datasheet Details

Part number LD5521
Manufacturer Leadtrend
File Size 349.18 KB
Description Quasi-Resonant PWM Flyback Controller
Datasheet download datasheet LD5521 Datasheet
Additional preview pages of the LD5521 datasheet.

📁 Similar Datasheet

  • LD5523 - Multi-Mode PWM Controller (Leadtrend Technology)
  • LD5523E - Multi-Mode PWM Controller (Leadtrend Technology)
  • LD5523H - Multi-Mode PWM Controller (Leadtrend Technology)
  • LD5523P - Multi-Mode PWM Controller (Leadtrend Technology)
  • LD5523Q - Multi-Mode PWM Controller (Leadtrend Technology)
  • LD5523R - Multi-Mode PWM Controller (Leadtrend Technology)
  • LD5525 - Multi-Mode PWM Controller (Leadtrend Technology)
  • LD550DUN-TGA2 - WUXGA TFT LCD (LG)
  • LD550DUN-TGB1 - WUXGA TFT LCD (LG)
  • LD550DUN-TKB1 - WUXGA TFT LCD (LG)
Other Datasheets by Leadtrend
  • LD5520 - Quasi-Resonant PWM Controller
  • LD5523D2 - PWM+QR Multi-mode Controller
  • LD5523K - Multi-Mode PWM Controller of Flyback
  • LD5523M1 - Multi-Mode PWM Controller of Flyback
  • LD5523T - Multi-Mode PWM Controller of Flyback
  • LD5535A1 - Green-Mode PWM Controller
  • LD5535E1 - Green-Mode PWM Controller
  • LD5537B1 - Green-Mode PWM Controller

Full PDF Text Transcription

Click to expand full text
LD5521 07/24/2015 Quasi-Resonant PWM Flyback Controller with Frequency Swapping and Integrated Protections REV. 01 General Description The LD5521 integrate a quasi-resonant PWM control function into a SOT-26 package. It takes less components counts or circuit space, especially ideal for those total solutions of low cost. The implemented functions include low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal soft driving. It also features more protections like OLP (Over Load Protection) and OVP (Over Voltage Protection) to prevent circuit damage occurred under abnormal conditions.
Published: |