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Leadtrend LD5521DGL product image
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Leadtrend LD5521DGLRoHS

Manufacturer
LeadtrendAsian Brands
MPN
LD5521DGL
LCSC Part #
C5124412
Packaging
SOT-26
Customer #
Key Attributes
Quasi-Resonant PWM Flyback Controller with Frequency Swapping and Integrated Protections
Datasheetpdf iconLeadtrend LD5521DGL
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Minimum: 5Multiple: 5Sales Unit: Piece
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QtyUnit Price(Reference Only)Total Amount
5+$ 0.2605$ 1.30
50+$ 0.2037$ 10.19
150+$ 0.1793$ 26.90
500+$ 0.1422$ 71.10
3,000+$ 0.1286$ 385.80
6,000+$ 0.1205$ 723.00
Standard Packaging3000/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers
ManufacturerLeadtrend
PackagingSOT-26
Operating Temperature-40℃~+125℃
Output Current-
Frequency - Switching130kHz
Pd - Power Dissipation200mW
Voltage - Breakdown-
Voltage - Supply8V~26.5V
FeaturesOver Voltage Protection;Under Voltage Protection;Overtemperature protection (OTP);Short Circuit Protection;Overload Protection
TopologyFlyback
Output Voltage-
Duty Cycle(Max)-
Working ModeQR
Feedback SystemSecondary-Side Feedback
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Introduction

AI Translation

The LD5521D integrates 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. 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.

Features

AI Translation
  • Secondary-side feedback control with quasi-resonant operation
  • Low startup current (<5μA)
  • 0.5mA ultra-low operating current at light load
  • 130kHz maximum switching frequency
  • Current mode control with cycle-by-cycle current limit
  • Green mode control
  • UVLO (Under Voltage Lockout)
  • LEB (Leading-Edge Blanking) on CS pin
  • VCC OVP (Over Voltage Protection)
  • Adjustable OVP (Over Voltage Protection) on FB pin
  • Output short protection by FB pin
  • OLP (Over Load Protection)
  • Internal OTP (Over Temperature Protection)
  • 250mA/-500mA driving capability

Applications

AI Translation
  • Switching AC/DC Adaptor