Document 1634-1
Flyback Transformer ZB1021-AL
• Design application for MAXIM17691A evaluation kit
• Discontinuous conduction mode flyback transformer
• Designed to operate at 150 kHz with 17 – 36 V input
• 1500Vrms, one minuteisolationbetweenprimary and secondary
Core material Ferrite
Terminations RoHS tin-silver-copper over tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight 3.85 g
Ambient temperature –40°C to +85°C
Max Part Temperature +125°C (ambient + temperature rise)
Storage temperature Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Packaging 200/13″ reel Plastic tape: 32 mm wide, 0.5 mm thick,
24 mm pocket spacing, 11.2 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
DCR max
Leakage
L
at 0 A2
Isat3
(A)
inductance
Isolation5 Power
(Ohms)
Turns ratio
Part
number1
±±0ꢀ (ꢁµ)
max (ꢁµ)4
Pri Sec Aux pri : sec : aux
(Vrms)
(W)
Output
ZB1021-ALD
22
3.4
0.25
0.068 0.018 0.288 1 : 0.33 : 0.5
1500
7.5
5 V, 1.5 A
1. Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (200 parts per reel). Quantities less than full reel
available: in tape (not machine ready) or with leader
and trailer ($25 charge).
Schematic
2. Inductance is for the primary, measured at 150 kHz, 0.1 Vrms, 0 Adc.
3. DC current that causes the primary inductance drop 30% from its value
without current. Click for temperature derating information.
4. Leakage Inductance is for the primary, measured with secondary
windings shorted together.
5. 1500 Vrms, one minute isolation (hipot) from primary to secondary.
6. Auxiliary winding 8 V, 0.005 A.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Connect pin 5 to 6 and pin 7 to 8 on the PC board
Document 1634-1 Revised 04/03/23
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© Coilcraft Inc. 2023
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.