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

Datasheet 3D Model

ZE2774-BE Isolated Buck Transformer

for STMicroelectronics STEVAL-6986YT2DL

The ZE2774-BE iso-buck boost converter transformer is optimized for the STEVAL-6986YT2DL reference design and built around the A6986I from STMicroelectronics. It supports a 5 V to 24 V input voltage range and delivers dual isolated outputs with two secondary windings. The typical output voltages, +6 V and -3 V, are designed to match the requirements of GaN gate drivers. The solution provides 1500 Vrms isolation voltage and functional insulation, with options for basic or reinforced insulation available on request. It is AEC-Q200 qualified, making it suitable for automotive and industrial power applications. For SiC MOSFET gate drivers, please refer to the ZD2020-AE transformer.

Optimized for the STEVAL-6986YT2DL iso-buck boost converter, based on the A6986I from STMicroelectronics
Designed for an input voltage range of 5 to 24 V with dual isolated outputs (6 V and -3 V)
Suitable for isolated GaN gate drivers, On-board chargers for HEV/EV, and industrial applications.
Functional insulation only. Basic or reinforced versions can be made available per request.
AEC-Q200 qualified

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Typical Application

Works with STMicroelectronics STEVAL-6986YT2DL

Input Voltage	Output		Fsw
Input Voltage	Sec1	Sec2	Fsw
5 V — 24 V	6 V , 0.2 A	-3 V , 0.2 A	250 kHz

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (µH) (Tolerance: ±10%)	Isat (A) 2	DCR max			Leakage Inductance max (µH) 3	Turns Ratio	Isolation Voltage (Vrms) 4
Part number (Hover for schematics)	Inductance at 0A (µH) (Tolerance: ±10%)	Isat (A) 2	Pri (Ω)	Sec1 (mΩ)	Sec2 (mΩ)	Leakage Inductance max (µH) 3	Pri : Sec1 : Sec2	Isolation Voltage (Vrms) 4
ZE2774-BED	20	2.65	0.17	430.00	300.00	0.41	1 : 0.5 : 0.273	1500

Notes

Inductance is for the primary, measured at 250 kHz, 0.1 Vrms, 0 Adc.
Isat: 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.
1500 Vrms, one minute isolation (hipot) between primary and secondary.

Termination:

RoHS tin-silver-copper over tin over nickel over phos bronze

Packaging:

D = 13" machine-ready reel
EIA 481 embossed plastic tape (900 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 + temperature 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
900	330	100	13	22,4	16,4	16	12	4	2	6,0	0,35

General specification

Core Material:

Ferrite

Weight:

0.57 – 0.77g

Packaging:

900/13″ reel Plastic tape: 16 mm wide, 0.35 mm thick, 12 mm pocket spacing, 6.0 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 to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

ZE2774-BE Isolated Buck Transformer

for STMicroelectronics STEVAL-6986YT2DL

Typical Application