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Hangzhou Silan Microelectronics SD4950TRRoHS

Manufacturer
Hangzhou Silan MicroelectronicsAsian Brands
MPN
SD4950TR
LCSC Part #
C19712348
Packaging
SOP-8
Customer #
Key Attributes
IEEE802.3AF Compatible PD and DC/DC Controller
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QtyUnit Price(Reference Only)Total Amount
1+$ 0.4516$ 0.45
10+$ 0.3522$ 3.52
30+$ 0.3098$ 9.29
100+$ 0.2576$ 25.76
500+$ 0.2348$ 117.40
1,000+$ 0.2201$ 220.10
Standard Packaging4000/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
ManufacturerHangzhou Silan Microelectronics
PackagingSOP-8
Operating Temperature-40℃~+85℃
FunctionStep-down type
Number of Outputs1
Frequency - Switching160kHz~200kHz
Output TypeFixed
TopologyFlyback
Operating Voltage36V~72V
Switch tube (built-in/external)Built-in
Output Voltage-
Output Current960mA
Quiescent Current350uA
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Introduction

AI Translation

SD4950 is a PD and DC/DC controller based on the IEEE 802.3af standard. The PD controller section provides signature resistance detection, inrush current limiting, and other functions for Powered Devices (PD) in Power over Ethernet (PoE) systems. It integrates an internal power MOSFET with a 100V breakdown voltage and 0.6Ω on-resistance, with built-in overcurrent protection, undervoltage protection, and overtemperature protection. The DC/DC controller section features an integrated 150V power MOSFET, employs Primary-Side Regulation (PSR), is suitable for flyback topology, and provides a precise constant-voltage control loop. Operating in PWM+PFM mode, it delivers high system efficiency and excellent EMI characteristics.

Features

AI Translation
  • PD Controller Section:
    • Complete power interface for IEEE 802.3af powered devices
    • On-chip 100V, 0.6Ω power MOSFET
    • Undervoltage protection
    • Overtemperature protection
    • 180mA inrush current limiting
    • 960mA operating current fault auto-restart
  • DC/DC Controller Section:
    • Primary-side control mode
    • Frequency reduction under light load
    • Leading-edge blanking
    • Peak current mode
    • Cycle-by-cycle current limiting
    • Undervoltage lockout
    • Soft-start
    • VCC overvoltage protection
    • Output short-circuit protection
    • Output overvoltage protection
    • Abnormal overcurrent protection
    • Overtemperature protection

Applications

AI Translation
  • Video surveillance
  • IP phone
  • Wireless AP