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SD4943 AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

SD4943 product

SD4943

Component

20-150 VDC0.5 Abuck converterintegrated MOSFETlight-load frequency reduction

SD4943 is an integrated high-voltage buck DC-DC controller for 20 V to 150 VDC inputs and 0.5 A continuous output designs.

Best for

  • 20 V to 150 VDC buck converters
  • Low-power industrial DC supplies
  • Buck-boost or flyback circuits within documented limits

Avoid if

  • A verified package or compliance status is mandatory but unavailable
  • The design cannot tolerate low-frequency operation at light load
  • Output voltage requires VOUT/VIN of 0.6 or higher

Check before use

  • Verify the exact package and procurement suffix
  • Validate output regulation with the required minimum load
  • Confirm inductor saturation current and diode ratings
  • Assess thermal behavior at maximum input voltage

Key specifications

Input voltage
20 V to 150 VDC
Continuous output current
0.5 A
Switching frequency
2 kHz to 120 kHz
Soft start
4.25 ms

Compliance & Environment

RoHS
-
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

High-voltage DC buck conversionIndustrial auxiliary powerLow-power flyback supplies

Datasheet

25fd94b3bc25232a905a37f8f4ce01f4_SD4943.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for SD4943: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
Schematic symbol for your EDA tool
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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KiCad Library
Verified KiCad 8 symbol, footprint, and 3D model
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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

SD4943 is a SILAN switching buck DC-DC converter IC with integrated power MOSFETs. It is specified for 20 V to 150 VDC input, 0.5 A continuous output current, and 2 kHz to 120 kHz switching operation.