Datasheet 3D Model

RA6998 Forward Mode Planar Transformer

for Maxim MAX17599 PWM Controller

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	$8.47
200	$7.26
600	$6.33
1200	$4.92
2400	$4.22
4800	$3.86

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

Packaging

D = 13" machine-ready reel

B = Less than full reel

. in stock, ready to ship today.

Request a Sample:

Typical Application

Works with Maxim MAX17599

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

Specifications

Electrical specifications at 25°C.

Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±20%)	DCR max 4			Leakage Inductance max (µH) 5	Turns Ratio	Isolation Voltage (Vrms) 6
Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±20%)	Pri (mΩ)	Sec (mΩ)	Gate (mΩ)	Leakage Inductance max (µH) 5	Pri : Sec : Gate	Isolation Voltage (Vrms) 6
RA6998-BLD	80	15.0	22.0	45.0	0.35	1 : 1.125 : 0.375	1500

Notes

Output is for the secondary winding. Output of the gate winding is 4 V, 0.25 A.
When ordering, please specify packaging code: e.g. RA6998-BLD
Inductance is measured at 250 kHz, 0.1 Vrms.
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.
Leakage inductance is for the primary winding with the secondary windings shorted.
1500 Vrms isolation from primary to secondary and gate.

Termination:

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

Packaging:

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.

Environmental

Environmental:

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):

See FIT/MTBF Calculations

Schematics

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
200	330	100	13	50,4	44,4	44	32	4	2	9,35	0,37

General specification

Core Material:

Ferrite

Weight:

10.6 g

Packaging:

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

Soldering/Washing

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.

RA6998 Forward Mode Planar Transformer

for Maxim MAX17599 PWM Controller

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Related product series

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PL140 Series

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Warehouses

Language settings

Currency settings

RA6998 Forward Mode Planar Transformer

for Maxim MAX17599 PWM Controller

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Related product series

Magnetics

B0860-CL Planar Transformer

C1539-AL Planar Transformer

DA2025-AL Planar Transformer

HA3648-BL Planar Transformer

HA4000-AL Planar Transformer

JA4309 Planar Transformer

Magnetics for

B0853-AL SMT Planar Transformer

A9786-AL Planar Magnetics

MA5519-AL Planar Transformer

NA5738-DL SMT Planar Transformer

NA5871-AL 800 W Planar Transformer

PA6605-AL Planar Transformer

PL140 Series

PL160 Series

PL300 Series

RA6992-BL SMT Planar Transformer

RA6999-AL Forward Mode Transformer

RA7040-AL Forward Mode

YA9215-AL 50 W Resonant Transformer

Warning