a0009-a Coilcraft, Inc., a0009-a Datasheet

a0009-a

Manufacturer Part Number

a0009-a

Description

Flyback Transformerfor National Semiconductorlm5000 Dc/dc Regulator

Manufacturer

Coilcraft, Inc.

Datasheet

1.A0009-A.pdf (1 pages)

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This surface mount flyback transformer is designed for

use with National Semiconductor LM5000 DC/DC regula-

tor. The core completely encloses the windings to mini-

Part number

1. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc.

2. Leakage inductance measured at 100 kHz, 0.1 Vrms from pins 1 to 4 with all other pins shorted.

3. Isolation measured from pin 1 to pins 5 and 6; from 2 to 5 and 6; and from pins 1, 2, 5 and 6 to the core.

4. Operating temperature range −40°C to +85°C.

5. Electrical specifications at 25°C.

Dimensions

A0009-A

Pins 1 – 4 Pins 2 – 3

Packaged 25 parts per tray.

100

Flyback Transformer

Inductance

±20% (µH)

100

voltage (V)

18 – 55

Input

Specifications subject to change without notice. Document 309 Revised 08/23/04

3.3 V @ 3 A

Output

mize EMI interference. The transformer features very low

DCR, 500 V isolation and a leakage inductance rating of

just 1.0 µH.

0.012 (5,6 – 7,8)

DCR max

0.150 (1 – 4)

0.150 (2 – 3)

(Ohms)

Schematic

Auxiliary

Input

Inductance

max (µH)

Leakage

1.0

For National Semiconductor

LM5000 DC/DC Regulator

in : out : aux

Turns ratio

1 : 0.33 : 1

Output

3.3 V @ 3 A

Document 309

Isolation

(Vrms)

500

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