Document 1320
For Silicon Labs Si828x 5kV
Isolated DC-DC Converter
Flyback Transformer
• Developed for use with Silicon Labs Si828x isolated dc-dc-
converter reference designs.
AEC
+
Q200 125°C
• 5000 Vrms, one minute isolation from primary to secondary
• Designedtomeetreinforcedinsulationclasswith8mmcreepage
and clearance.
• AEC-200 Grade 1 (–40°C to +125°C)
Core material Ferrite
Terminations RoHS tin-silver-copper (95.5/3.8/0.7) over tin over
nickel over phos bronze.
Weight 1.1 g
Ambient temperature –40°C to +125°C
Maximum part temperature +160°C
Storage temperature Component: –40°C to +160°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 700 per 13″ reel Plastic tape: 32 mm wide, 0.40 mm thick,
16 mm pocket spacing, 5.72 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Leakage
DCR max (Ohms)
pri sec1 sec2
Part
Input
Inductance2 inductance3
Turns ratio
Isat4
number1 voltage (V)
±±5 (µH)
max (µH)
pri:sec1:sec2
(A)
Output5
TA7788-AL_
7 – 24
25.0
0.60
0.265 0.437
0.235
1:1.25:0.75
1.4
15 V, 0.13 A
1. When ordering, specify a packaging code:
TA7788-ALD
Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic
tape. 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.
2. Inductance is for the primary, measured on an Agilent/HP 4284 at 250 kHz,
0.1 Vrms, 0 Adc.
3. Leakage inductance measured between pins 2 and 3 at 250 kHz, 0.1Vrms,
0 Adc with all secondary pins shorted.
4. DC current that causes an inductance drop of 30% (typ) from its value
without current
5. Output of Sec1 is 15 V, 0.13 A. Output of Sec2 is 9 V, 0.13 A.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
inches
mm
Dimensions are in
Parts shown are preproduction products available for evaluation only. Part changes are not effective until May 1, 2023.
Document 1320 Revised 03/21/23
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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.