The **CDH-C-R** series (typically associated with manufacturers like **Cyntec**) refers to a specific line of **Surface Mount Device (SMD) Power Inductors**. These components are essential in modern electronics for managing power supply and filtering signals. --- ### 1. Technical Specifications Below is a breakdown of the typical electronic characteristics found in the CDH-C-R series: | Feature | Description | | :--- | :--- | | **Component Type** | Shielded SMD Power Inductor | | **Magnetic Shielding** | Magnetic resin shielded (reduces EMI/interference) | | **Core Material** | Ferrite core for high efficiency | | **Operating Temp** | Typically -40°C to +125°C | | **Termination** | Lead-free (RoHS compliant) silver or tin plating | --- ### 2. Key Electronic Functions The CDH-C-R series serves three primary purposes in a circuit: 1. **Energy Storage:** In DC-DC converters (Buck or Boost), these inductors store energy in a magnetic field during the switching cycle and release it to the load. 2. **Noise Filtering:** They act as low-pass filters, allowing direct current (DC) to pass while blocking high-frequency noise and ripples. 3. **Voltage Regulation:** They help maintain a steady output voltage in power management integrated circuits (PMICs). --- ### 3. Deciphering the Part Number While specific codes vary by manufacturer, the nomenclature generally follows this logic: | Segment | Meaning | Example | | :--- | :--- | :--- | | **CDH** | Series Name (Inductor Type) | CDH | | **C** | Construction style (Compact/Core type) | C | | **Size Code** | Dimensions (e.g., 4D28, 6D28) | 6D28 | | **Inductance** | Value in Microhenries ($\mu H$) | 100 (10 $\mu H$) | | **R** | Packaging (usually Tape & Reel) | R | --- ### 4. Applications These parts are commonly found in compact consumer electronics due to their low profile and high current handling: * **Mobile Devices:** Smartphones and tablets. * **Computing:** Laptops, SSD power rails, and motherboards. * **LCD Displays:** Backlight drivers and panel power. * **DC-DC Converters:** Integrated power modules. --- ### 5. Comparison: Shielded vs. Unshielded The **CDH-C-R** is typically a **shielded** inductor. Here is why that matters: ```markdown - Shielded (CDH-C-R): - Lower Electromagnetic Interference (EMI). - Higher component density allowed on PCB. - Slightly higher cost due to resin/shielding process. - Unshielded: - Higher EMI leakage. - Risk of interfering with nearby sensitive components. - Cheaper and smaller. ```