D1787-AL Datasheet, PDF (1/2 Pages) Coilcraft lnc. – SMT Power Inductor

Document 484-1
SMT Power Inductor For National Semiconductor
LM5115 DC Controller IC
The D1787-AL was developed for use with the National
Semiconductor LM5115 Secondary Side Post Regula-
tor Controller and LM5025 Primary Side Controller. This
flat wire power inductor offers extremely low dc resis-
tance and very high current ratings (up to 23 Arms).
The flat core allows for exceptional heat dissipation
and provides an excellent surface for pick and place
operation.
This inductor is ideal for power supply applications where
high current handling is essential and is perfect for low-
voltage dc-dc converters. Custom inductance values are
also possible.
Request free evaluation samples by contacting Coilcraft
or visiting www.coilcraft.com.
Part
number
D1787-AL
DCR SRF
Inductance¹ max typ²
±10% (µH) (mOhms) (MHz)
33.0
2.8
9.0
Isat³ Irms⁴
(A) (A)
8.0 23.0
1. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc using Coilcraft
SMD-D fixture in Agilent/HP 4284A impedance analyzer.
2. SRF measured using Agilent/HP 8753D network analyzer and
Coilcraft SMD-D test fixture.
3. DC current at which the inductance drops 20% (typ) from its value
without current.
4. Average current for a 40°C rise above 25°C ambient.
5. Operating temperature range -40°C to +85°C.
6. Electrical specifications at 25°C.
See Qualification Standards section for environmental and test data.
Temperature Rise vs Current
30
25
20
15
10
5
0
0
5
10
15
20
25
Current (A rms)
© Coilcraft, Inc. 2006
Specifications subject to change without notice.
Please check our website for latest information. Document 484-1 Revised 11/09/06