Sunlord Three-line CMC Coil SDMM0906 Series for MIPI C-PHY v1.0
In response to the growing demand for data transferred from smartphone cameras and displays, the MIPI Consortium launched the C-PHY protocol in 2013 with higher transmission rates and lower device costs. Currently, some vendors are using MIPI C-PHY, and it may become a mainstream smartphone application in the future.
Table.1
MIPI C-PHY is a complex transmission line made up of three lines. It uses an embedded clock with up to 9-pin configuration for greater space saving. C-PHY determines the clock signal using the difference between three signal lines at 3/4V, 1/2 V, and 1/4V, respectively. Three lines have different states at the same time, so they have six different states, which are represented by ± X, ±y, and ± Z in the protocol. The state switch represents a transfer cycle.
Fig.1
In the MIPI C-PHY v2.0 protocol, the transmission rate of a group of differential lines is as high as 13.7Gbps. The improvement of the transmission rate brings more high-frequency common mode noise interference, and a common mode choke coil is an effective way to solve the high-frequency common mode interference. The general differential transmission line is composed of two lines, which can be used to filter high-frequency noise with a two-line CMC coil. MIPI C-PHY is a complex transmission line consisting of three lines. If a two-line common mode choke coil is used, the number of devices will be increased, the common mode noise suppression effect is not good and the transmission waveform become disorder. MIPI C-PHY uses a three-line common mode choke coil coupled with three lines inside the magnet to effectively suppress common mode noise without affecting signal transmission.
Fig.2
MIPI C-PHY v1.0 Three-line CMC SDMM0906 Series
Product size and equivalent circuit
Fig.3
Features
Multi-layer and multi-loop structures to achieve high-impedance products
Effective for suppressing common mode noise at high frequency
Mature product technology platform, automatic production
Electrical properties
SDMM0906H Series
Table.2
Insertion loss vs. Frequency (SDMM0906H-3-300T)
Fig.4
Insertion loss vs. Frequency (SDMM0906H-3-300T)
Fig.5
Impedance vs. Frequency (SDMM0906H-3-300T)
Fig.6
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