High Current SMD Power Choke LPM1240-1270 Series Lowest Height in Package for Notebooks and Servers

LPM1240/1250/1260/1265/1270 Series high current power inductors

The LPM1240-1270 series shielded SMD power inductor features a composite structure and shielded design , offering the lowest height in its package size , the lowest DCR/μH in its package size, and excellent capability to handle high transient current spikes without saturation. The composite structure significantly reduces audible noise, making it suitable for noise-sensitive applications. Operating temperature: -40 to +105°C . Storage temperature: -40 to +105°C , meeting various harsh environment requirements. It is widely used in DC-DC converters , distributed power systems , personal computers and handheld electronic devices , PDA/laptops/desktops/servers , high-current POL converters , and battery-powered devices . It is an ideal choice for compact high-density power supply designs.

• Handles high transient current spikes without saturation.
• Ultra low buzz noise, due to composite construction.
• Shielded construction
• Lowest height in this package footprint.
• Lowest DCR/H, in this package size.

• DC/DC converters in distributed power systems
• Applications usedin power switching
• Personal computers and other handheldelectronic equipment.
• PDA/notebook/desktop/server applications
• High current POL converters
• Low profile, high current power supplies
• Battery powered devices

• Test Frequency : 100KHz / 0.25Vdc
• Heat Rated Current (Irms) will cause the coil temperature rise approximately,△T=40℃ without core loss.
• Saturation Current (Isat) will cause L0 to drop approximately 20%
• The part temperature (ambient + temp rise) should not exceed 125℃ under worst case operating conditions. 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.
• Operating Temperature: -40℃ - +105℃.
• Storage Temperature: -40℃ - +105℃.

Note: Product specifications can be customized.

Q: How does the composite structure reduce audible noise?

A: The composite structure uses special core materials and filling processes to effectively reduce vibration caused by the magnetostrictive effect. This significantly reduces audible noise in the audible frequency range, making it especially suitable for noise-sensitive portable devices and consumer electronics applications.

Q: What is the difference between Irms and Isat? How to select?

A: Irms (rated current) is the DC current value that causes a temperature rise of approximately 40°C in the coil. Isat (saturation current) is the peak current value at which inductance drops by approximately 20%. For selection, we recommend taking the lower of the two values and ensuring the component temperature (ambient temperature + temperature rise) does not exceed 125°C .

Q: What are the advantages of the lowest height design in its package size?

A: The lowest height design in its package size saves PCB vertical space, making it especially suitable for height-constrained compact device designs, meeting the trends of miniaturisation and slim form factors without compromising power handling capability.

Q: How to apply for samples? What is the lead time?

A: You can submit a sample application through our website or email. Please provide your company information and target model. Samples are free of charge and will be shipped within 3-5 working days . Mass order lead time is generally 2-8 weeks .