Molding SMD Power Inductors - SMS1770 Series
Product Overview
The SMS1770 Series from SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD. offers ultra-high current SMD power inductors designed for demanding applications. These thin, magnetically shielded inductors feature low DC resistance and exceptional anti-electromagnetic interference capabilities, making them ideal for high-density installations. Their integral construction ensures high reliability and superior vibration resistance, while the composite structure minimizes buzz noise. Utilizing low-loss alloy powder for die-casting, these inductors achieve low impedance and small parasitic capacitance, contributing to high efficiency and reduced core eddy-current loss. They operate at frequencies up to 3MHz and have an absolute maximum voltage of 30VDC, complying with RoHS, Halogen Free, and REACH standards.
Product Attributes
- Brand: SHENZHEN LANTU MICRO ELECTRIC TECHNOLOGY CO., LTD.
- Series: SMS1770
- Type: Molding SMD Power Inductor
- Certifications: RoHS, Halogen Free, REACH Compliance
- Origin: China
Applications
- PDA, Notebook, Desktop, Server Applications
- High Current POL Converters
- Battery Powered Devices
- DC/DC Converters in Distributed Power Systems
Technical Specifications
General Specifications
| Parameter | Value |
| Operating Temperature | -55 to +125 (Including coils self-temperature rise) |
| Frequency | Up to 3MHz |
| Absolute Maximum Voltage | 30VDC |
Electrical Characteristics (at 25)
| Part No. | Inductance (L @ 0A) | Tol. | DCR (m) Typ. | DCR (m) Max. | Saturation Current (A) Typ. | Heat Rating Current (A) Typ. |
| SMS1770-R22M | 0.22 H | 20% | 0.63 | 0.75 | 75.00 | 57.00 |
| SMS1770-R47M | 0.47 H | 20% | 0.90 | 1.03 | 72.00 | 55.00 |
| SMS1770-1R0M | 1.0 H | 20% | 1.60 | 2.30 | 55.00 | 32.00 |
| SMS1770-1R5M | 1.5 H | 20% | 1.78 | 2.50 | 48.00 | 31.00 |
| SMS1770-2R2M | 2.2 H | 20% | 2.40 | 2.70 | 34.00 | 29.00 |
| SMS1770-3R3M | 3.3 H | 20% | 3.68 | 4.20 | 30.00 | 24.00 |
| SMS1770-4R7M | 4.7 H | 20% | 4.84 | 5.50 | 24.00 | 21.00 |
| SMS1770-5R6M | 5.6 H | 20% | 6.68 | 7.60 | 23.00 | 20.00 |
| SMS1770-6R8M | 6.8 H | 20% | 8.40 | 9.20 | 22.00 | 17.00 |
| SMS1770-8R2M | 8.2 H | 20% | 10.10 | 11.60 | 20.00 | 13.00 |
| SMS1770-100M | 10 H | 20% | 11.60 | 13.00 | 19.00 | 12.00 |
| SMS1770-150M | 15 H | 20% | 18.80 | 20.50 | 14.50 | 11.00 |
| SMS1770-220M | 22 H | 20% | 25.10 | 26.50 | 11.50 | 8.50 |
| SMS1770-330M | 33 H | 20% | 38.00 | 44.00 | 10.00 | 8.00 |
| SMS1770-470M | 47 H | 20% | 48.00 | 55.00 | 7.50 | 6.00 |
| SMS1770-560M | 56 H | 20% | 54.00 | 62.00 | 7.00 | 5.50 |
| SMS1770-680M | 68 H | 20% | 68.00 | 80.00 | 6.50 | 5.20 |
| SMS1770-101M | 100 H | 20% | 110.00 | 118.00 | 5.00 | 3.70 |
Inductance Tolerance Codes
| Code | Tolerance |
| J | 5% |
| K | 10% |
| L | 15% |
| M | 20% |
| P | 25% |
| N | 30% |
Dimensions (mm)
| Part No. | L | W | H |
| SMS1770 | 17.50 0.50 | 17.15 0.30 | 7.50 Max |
Recommended Land Pattern (mm)
| A | B | C | D | E | F | G | H |
| 17.5 0.50 | 17.15 0.30 | 7.50 Max | 12.0 Typ | 2.50 Typ | 12.4 | 19.5 | 12.5 |
Packaging
| Packing Type | Description |
| Bulk Package (B) | |
| Tape & Reel (TF) | |
Test Equipment
| Parameter | Equipment |
| Inductance (L) | WK3260B LCR meter or equivalent |
| Saturation Current (Isat) & Heat Rating Current (Irms) | WK3260B + WK3265B or equivalent |
| DC Resistance (DCR) | Chroma 16502 or equivalent |
Definitions
| Term | Definition |
| Saturation Current | DC current at which inductance drops 30% from its value without current. |
| Heat Rating Current | The actual value of DC current when the temperature rise is T 40 (Ta=25). |
| Rated DC Current | The lesser value between Isat and Irms. |
Important Notes
Circuit design, component, PCB trace size and thickness, airflow, and other cooling provisions all affect the part temperature. Part temperature should be verified in the end application.
