RA6999_14 Datasheet, PDF (1/1 Pages) Coilcraft lnc. – Forward Mode Transformer

Document 1198
Forward Mode Transformer ForMaximMAX17599
PWM Controller
• 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 MAXREFDES48#
Core material Ferrite
Terminations  RoHS tin-silver (96.5/3.5) over tin over nickel over phos
bronze.
Weight  10.5 g
Ambient temperature  –40°C to +85°C
Storage temperature  Component: –40°C to +125°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 175 per 13″ reel  Plastic tape: 44 mm wide, 0.4 mm thick,
28 mm pocket spacing, 11.9 mm pocket depth
PCB washing  Tested with pure water or alcohol only. For other solvents,
see Doc787_PCB_Washing.pdf.

Part
  _number1
RA6999-AL_
Inductance
  _{at 0 A}2
DCR max (mOhms)
min (µH)
pri   sec   gate
70
20.5 29.5 36.4
Leakage
inductance
max (µH)
0.35
Turns ratio
pri : sec  pri : gate
1 : 1.125 1 : 0.375
  _Output3
12 V, 3.3 A
1. When ordering, please specify a packaging code:
RA6999-ALD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic tape (175 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 12 V, 0.25 A
4. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
7
Gate
9
1
10
Pri
Sec
3
6
Dimensions are in
inches
mm
US [phone] [e-mail]
UK [phone] [e-mail]
Taiwan [phone] [e-mail]
China [phone] [e-mail]
Singapore + 65-6484 8412 [e-mail]
Document 1198  Revised 08/19/14
© 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.