3D Model Datasheet

RA6999-AL Forward Mode 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.
For a planar tranformer with a smaller footprint and lower profile, see RA6998-BL

Buy Now:

Count	Unit price
1	$4.19
175	$3.60
700	$3.13
1400	$2.43
2800	$2.09
5000	$1.92

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

Packaging

D = 13" machine-ready reel

. in stock, ready to ship today.

Request a Sample:

Typical Application

Works with Maxim MAX17599

Input Voltage	Output 1	Power
18 V — 36 V	12 V , 3.3 A	40 W

Specifications

Electrical specifications at 25°C.

Part number 2 (Hover for schematics)	Inductance min (µH) 3	DCR max (mΩ) 4			Leakage Inductance max (µH) 5	Turns Ratio	Isolation Voltage (Vrms) 6
Part number 2 (Hover for schematics)	Inductance min (µH) 3	Pri	Sec	Gate	Leakage Inductance max (µH) 5	Pri : Sec : Gate	Isolation Voltage (Vrms) 6
RA6999-AL_	70	20.5	29.5	36.4	0.35	1 : 1.125 : 0.375	1500

Notes

Output is of the secondary winding. Gate winding output is 4 V, 0.25 A.
When ordering, please specify packaging code: e.g. RA6999-ALD
Inductance is for the primary, measured at 250 kHz, 0.1 Vrms, 0 Adc.
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.

Packaging:

D = 13″ machine ready reel. EIA-481 embossed plastic tape (175 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 +125°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
175	330	100	13	50,4	44,4	44	28	4	2	11.9	0,4

General specification

Core Material:

Ferrite

Weight:

10.5 g

Packaging:

175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 28 mm pocket spacing, 11.9 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

RA6999-AL Forward Mode 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

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

RA6998 Forward Mode Planar Transformer

RA7040-AL Forward Mode

YA9215-AL 50 W Resonant Transformer

Warehouses

Language settings

Currency settings

RA6999-AL Forward Mode 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

RA6998 Forward Mode Planar Transformer

RA7040-AL Forward Mode

YA9215-AL 50 W Resonant Transformer

Warning