PoE Ethernet Port Design: Six Questions Engineers Ask Most
VOOHU explains six common PoE design questions, from LAN Transformer DC bias and IEEE 802.3af/at/bt current ratings to 90 W component selection and the PD-side
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Selection guides, cross-reference reviews and engineering Q&A for LAN transformers, RJ45, SFP and other communication components, plus the latest from VOOHU.
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100/1000 BASE-T PoE+ LAN Transformer Selection Comparison: VOOHU WHSG24R03C0 vs. CND-tek G24191S
1. Competitor Product Overview (CND-tek) A single-port Gigabit PoE+ interface has four differential channels to manage. Its magnetics must carry the 1000BASE-T
10/100 BASE-TX LAN Transformer Selection Comparison: VOOHU WHSH16109N0 vs. Bothhand NS0013 LF
1. Competitor Product Overview (Bothhand Enterprise Inc.) For PC Card, CardBus, and compact 10/100M Ethernet interface designs, Bothhand NS0013 LF uses a 16-pin
How to Stop Molded Power Inductor Coil Whine: Light-Load PFM, Magnetostriction, IRMS and ISAT Selection
A practical method for tracing light-load inductor noise and choosing VOOHU molded inductors by L, DCR, IRMS, ISAT and mechanical constraints.
PoE Power Transformer Selection Comparison: VOOHU WHEP7089 vs. Coilcraft POE30P-12LD Replacement Evaluation
VOOHU WHEP7089 and Coilcraft POE30P-12LD are compared for 3 W PoE flyback power transformer replacement evaluation, with attention to terminal topology, electri
How to choose between single channel and dual channel BMS isolation transformer? 600–1600V operating voltage, CMC and daisy chain break positioning
From the aspects of single/dual channel, 600–1600VDC operating voltage, isolation withstand voltage, CMC and chain break waveform, the selection and verificatio
Push-pull transformer selection comparison: VOOHU WH41-111 and Würth Elektronik 78931812505 replacement evaluation
VOOHU WH41-111 vs. Würth Elektronik 78931812505 push-pull transformer replacement evaluation focusing on terminal topology, turns ratio, isolation withstand vol
How to choose multi-phase Buck coupling inductor? Load transient verification of 72–320nH, DCR and high temperature saturation current｜VOOHU
From the phase-to-phase coupling, 72-320nH inductance, DCR, high temperature saturation current and load step waveform, the selection and verification method of
How to Choose an SFP Cage Light Pipe: Panel Matching for No-Light, 1×4 Light-Pipe, and 2×6 Outer-Dual-Light Designs
Learn how to choose a no-light, 1×4 light-pipe, or 2×6 outer-dual-light SFP cage, prevent light leakage and panel misalignment, and match VOOHU SFP+ and SFP28 p
VOOHU Electronics--RJ45 illuminated interface LED lamp position, polarity, VF/IF and PHY driver verification method
When a customer used the VOOHU SYT561188AB1A3DY1027 RJ45 with light for design, they encountered a strange problem: the network port could be connected, but the
How to reduce the leakage inductance of planar transformer? 0.5μH leakage inductance, winding interleaving and switching spike verification in 90W power supply
How to reduce the leakage inductance of planar transformer? Introducing the four products in the VOOHU WHPT-EQ200 90W, Lk maximum 0.5μH series for 24V, 12V, 5V
How to choose USB 2.0 common mode inductor? Impedance, differential insertion loss and ESD layout verification
How to choose USB 2.0 common mode inductor? This article explains the difference between common mode impedance and 90Ω differential impedance, differential inse
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