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ZF2957-AE Flyback Transformer

STMicroelectronics STEVAL-A6986IV3

RoHS compliant halogen free AEC-Q flag
  • 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 
  • Functional insulation only. Basic or reinforced 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
Sec1 Sec2 Sec3
12 V 28 V 30 V , 0.15 A 30 V , 0.15 A 30 V , 0.15 A 28.5 W 250 kHz

Specifications

Electrical specifications at 25°C.

Part number
(Hover for schematics)
Inductance
at 0A (µH) 2
(Tolerance: ±20%)
Isat (A) 3 DCR max (Ω) Leakage
Inductance
max (µH) 4
Turns Ratio Isolation
Voltage (Vrms) 5
Pri Sec1 Sec2 Sec3 Sec4 Pri : Sec1 : Sec2 : Sec3 : Sec4
ZF2957-AED 22.0 6.0 0.085 4.35 4.35 4.35 1.5 0.25 1 : 2.4 : 2.4 : 2.4 : 2.4 1500
Notes
  1. Sec1, Sec2, Sec3 outputs: 30 V, 0.15 A; Sec4 output: 30 V, 0.50 A.
  2. Inductance is for the primary, measured at 200 kHz, 0.1 Vrms, 0 Adc.
  3. DC current that causes the primary inductance to drop 30% from its value without current.
  4. Leakage inductance is for the primary with the secondary windings shorted.
  5. 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):

Performance curves

L vs Current

Schematics

zf2957s.gif

Physical characteristics

zf2957d.gif

dims_inches_mm.gif

Tape and Reel specification

tapereel_pl.gif

 
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_c.gif
200 330 100 13 50,4 44,4 44 28 4 2 9,3 0,4

General specification

Core Material:
Ferrite
Weight:
10.4 – 10.6 g
Packaging:
200 per 13″ reel Plastic tape: 44 mm wide, 0.4 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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