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Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

RA6998 Forward Mode Planar Transformer

for Maxim MAX17599 PWM Controller

RoHS compliant
  • Developed for use with Maxim MAX17599 Active Clamp Current-Mode PWM Controller.
  • Designed for forward topology operating at 250 kHz with an input range of 18 – 36 V.

Buy Now:
Count Unit price
1 $8.06
200 $6.91
600 $6.02
1200 $4.68
2400 $4.01
4800 $3.67

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
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Typical Application

Works with Maxim MAX17599

Input Voltage Output 1 Fsw
Sec Gate
18 V 36 V 12 V , 3.3 A 4 V , 0.25 A 250 kHz


Electrical specifications at 25°C.

Part number 2
(Hover for schematics)
at 0A (µH) 3
(Tolerance: ±20%)
DCR max (mΩ) 4 Leakage
max (µH) 5
Turns Ratio Isolation
Voltage (Vrms) 6
Pri Sec Gate Pri : Sec : Gate
RA6998-BL_ 80 15.0 22.0 45.0 0.35 1 : 1.125 : 0.375 1500
  1. Output is for the secondary winding. Output of the gate winding is 4 V, 0.25 A.
  2. When ordering, please specify packaging code: e.g. RA6998-BLD
  3. Inductance is measured at 250 kHz, 0.1 Vrms.
  4. DCR for the secondary is measured with the windings connected in parallel. DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  5. Leakage inductance is for the primary winding with the secondary windings shorted.
  6. 1500 Vrms isolation from primary to secondary and gate.


  • RoHS-compliant  260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations.


  • D = 13″ machine ready reel. EIA-481 embossed plastic tape (200 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
  • B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: –40°C to +85°C
Tape and reel packaging: –40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):



Physical characteristics



Tape and Reel specification


Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_v.gif
200 330 100 13 50,4 44,4 44 32 4 2 9,35 0,37

General specification

Core Material:
10.6 g
200/13″ reel Plastic tape: 44 mm wide, 0.37 mm thick, 32 mm pocket spacing, 9.35 mm pocket depth


Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested with pure water or alcohol only. More info.

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