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Introduction
Specifications
Environmental
Performance curves
Schematics
Physical characteristics
Tape & Reel
Soldering/Washing

3D Model Datasheet

ZC1905-BE Flyback Transformers

for STMicroelectronics STEVAL-A6986IV3

Optimized for STEVAL-A6986IV3 from STMicroelectrics with an isobuck-boost topology and an input voltage of up to 28 V
Suitable for isolated IGBT/SiC gate driver, On-board charger for HEV/EV, and industrial applications
Higher isolation and creepage and clearance version is available per request
AEC-Q200 qualified

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Typical Application

Works with STMicroelectrics STEVAL-A6986IV3

Input Voltage	Output 1	Power	Fsw
28 V	30 V , 0.1 A	3 W	500 kHz

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Isat (A) 3	DCR max (Ω)					Leakage Inductance max (µH) 4	Turns Ratio 5	Isolation Voltage (Vrms) 6
Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Isat (A) 3	Pri	Sec1	Sec2	Sec3	Sec4	Leakage Inductance max (µH) 4	Pri : Sec1	Isolation Voltage (Vrms) 6
ZC1905-BED	20	4.8	0.05	1.95	1.95	1.95	1.13	0.25	1 : 2.69	1500

Notes

Sec1, Sec2, Sec3 outputs: 30 V, 0.10 A; Sec4 output: 30 V, 0.25 A.
Inductance is for the primary, measured at 500 kHz, 0.1 Vrms, 0 Adc.
DC current that causes the primary inductance to drop 30% from its value without current.
Leakage inductance is for the primary with the secondary windings shorted.
The turns ratio from the primary to each of the four secondaries is 1 : 2.69.
1500 Vrms, one minute isolation (hipot) between primary and secondary windings.

Termination:

RoHS-compliant, halogen free. 260°C compatible. Tin-silver-copper 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).

Environmental

Environmental:

RoHS compliant , halogen free

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C

Maximum part temperature:

+165°C (Ambient + temp rise)

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

See FIT/MTBF Calculations

Performance curves

L vs Current

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	28	4	2	9,3	0,4

General specification

Core Material:

Ferrite

Weight:

5.1 – 5.3 g

Packaging:

200 per 13″ reel Plastic tape: 44 mm wide, 0.40 mm thick, 28 mm pocket spacing, 9.3 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.

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ZC1905-BE Flyback Transformers

for STMicroelectronics STEVAL-A6986IV3

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Performance curves

L vs Current

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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