The **HMP1352S-R85** is a high-current, low-profile power inductor, typically used in automotive and industrial electronic applications. It is part of a series designed for high-frequency DC-DC converters where space is limited but power requirements are high. --- ### Technical Specifications Below are the typical electronic characteristics for the **R85** (0.85µH) variant of this component: | Parameter | Value | Notes | | :--- | :--- | :--- | | **Inductance** | 0.85 µH | Nominal value at 100kHz | | **Tolerance** | ±20% | Standard industry tolerance | | **DCR (Max)** | ~1.10 mΩ | DC Resistance (Internal wire loss) | | **Isat (Saturation Current)** | ~40.0 A | Current where inductance drops by 20-30% | | **Irms (Heating Current)** | ~30.0 A | Current causing a 40°C temperature rise | | **Operating Temp** | -55°C to +155°C | Includes self-heating effects | --- ### Key Electronic Features #### 1. Composite Construction The HMP series usually utilizes a **molded magnetic iron powder core**. This construction offers several benefits: * **Soft Saturation:** Unlike ferrite cores that drop inductance sharply, this part loses inductance gradually as current increases. * **Magnetic Shielding:** The molded body reduces Electromagnetic Interference (EMI) by containing the magnetic flux. #### 2. High Current Density The "S" in the part number often indicates a specific footprint size (approx. 13mm x 13mm). Despite its small size, it can handle peak currents exceeding 40 Amps due to the flat wire or high-conductivity copper used internally. #### 3. Low DCR (DC Resistance) The very low resistance (approx. 1.1 mΩ) ensures that the inductor generates minimal heat even when large amounts of power pass through it. This increases the overall efficiency of the power supply. --- ### Common Applications * **Automotive Electronics:** Power steering, LED lighting drivers, and infotainment systems (AEC-Q200 qualified usually). * **Voltage Regulator Modules (VRMs):** Used in servers and high-end workstations. * **DC-DC Converters:** Point-of-Load (PoL) converters for FPGAs and CPUs. --- ### Package Footprint Example ```text Dimensions (approximate): L: 13.5 mm W: 12.6 mm H: 5.0 mm (Low Profile) ```