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© Coilcraft Inc. 2014

This product may not be used in medical or high

risk applications without prior Coilcraft approval.

Specification subject to change without notice.

Please check web site for latest information.

Planar Transformer

Document 1199

Document 1199 Revised 07/03/14

1. When ordering, please specify a

packaging code:

RA6998-BLD

Packaging: D = 13

″ machine ready reel. EIA-481 embossed plastic tape (200 parts per full reel).

B = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead.

2. Inductance is measured at 250 kHz, 0.1 Vrms.

3. Output is for the secondary winding. Output of the gate winding is 4 V, 0.25 A

4. Electrical specifications at 25°C.

Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

Inductance

Leakage

Part

DCR max (mOhms)

inductance

Turns ratio

±20%(µH)

pri

sec

gate

max (µH)

pri : sec

pri : gate

RA6998-BL_

80

15.0

22.0

45.0

0.35

1

:1.125

1

:0.375

12 V, 3.3 A

• Forward mode transformer for the Maxim MAX17599 Active

Clamp Current-Mode PWM Controller

• 18 – 36 V input; 12 V, 3.3 A output

• 1500 Vrms, one minute isolation from primary to secondary

and gate windings

• Specified on reference design MAXREFDES41#

For Maxim MAX17599

PWM Controller

Dimensions are in

inches

mm

Core material Ferrite

Ambient temperature –40°C to +85°C

Storage temperature Component: –40°C to +85°C.

Tape and reel packaging: –40°C to +80°C

Resistance to soldering heat Max three 40 second reflows at

+260°C, parts cooled to room temperature between cycles

Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /

85% relative humidity)

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

38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Packaging 200/13

″ reel Plastic tape: 44 mm wide, 0.37 mm thick,

32 mm pocket spacing, 9.35 mm pocket depth

PCB washing Tested with pure water or alcohol only. For other

solvents, see Doc787_PCB_Washing.pdf

0.360

9,14

max

0.810

20,57

max

0.920

23,37

max

0.006 /0,15

1

3

5

6

9

7

10

0.800

20,32

Recommended

Land Pattern

0.250

6,35

0.190

4,82

0.380

9,64

Ø

0.110

2,79

Ø

0.080

2,03

1

3

10

6

7

9

5

Dot indicates pin 1

9

7

10

1

5

Pri

Sec

Gate

6