3D Model Datasheet

D1787 Series

SMT Power Inductor for Texas Instruments LM5115DC

D1787 Series high-current, high-inductance power inductors feature a flat-wire construction, resulting in exceptionally low DC resistance. They come in a wide range of sizes and inductance values for POL, VRM, VRD, and other high power applications.

Developed for Texas Instruments LM5115DC Post Regulator Controller
Core shape allows excellent heat dissipation.
Rugged flat wire construction
Exceptionally low DC resistance
Ferrite core for flat L vs. I characteristics
Magnetically shielded to minimize EMI

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Count	Unit price
1	$4.14
250	$3.55
500	$3.09
1000	$2.40
2500	$2.06
5000	$1.90

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Specifications

Electrical specifications at 25°C.

Part number	Inductance (µH) 1 (Tolerance: ±20%)	DCR max (mΩ) 2	SRF typ (MHz) 3	Irms (A) 4
Part number	Inductance (µH) 1 (Tolerance: ±20%)	DCR max (mΩ) 2	SRF typ (MHz) 3	Irms (A) 4
D1787-AL	33	2.8	9.0	23.0

Notes

Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc using a Coilcraft SMD-D fixture in an Agilent/HP 4263B impedance analyzer or equivalent.
DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
SRF measured using an Agilent/HP 8753D network analyzer and a Coilcraft SMD-D test fixture. Details
Irms: Current that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings. Temperature derating curves.

Termination:

RoHS tin-silver (96.5/3.5) over copper.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

−40°C to +85°C with Irms current

Storage temperature range:

Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C

Maximum part temperature:

+125°C (Ambient + temperature rise)

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Performance curves

Inductance vs. Current

Inductance vs. Frequency

Temperature Rise vs. Current

Physical characteristics

General specification

Core Material:

Ferrite

Weight:

34.9 g

Packaging:

25 parts per tray

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

Resistance to soldering heat:

Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

D1787 Series