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SMT Flyback Transformers for
TI TPS23753 PoE Interface

These parts are not available for new designs. HA3801-BL, HA3802-BL and HA3803-BL transformers enhance the performance of Texas Instruments TPS23753EVM evaluation module. These transformers offer tighter primary to gate drive coupling, which provides higher efficiency and eliminates potential for audible noise.
  • Developed for Texas Instruments TPS23753 for use at 125 kHz.
  • Listed as T2 on SLVU245 for evaluation module TPS23753EVM.
  • 10 W output from 36 – 57 V PoE input or 24 V adapter; 6 W output from 12 V adapter.
  • 1500 Vrms, one minute isolation, primary and bias to secondary
  • RoHS-compliant. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations

SPECIFICATIONS


Part number1 L at 0A2
±10%
(µH)
L at Ipk3
min 
(µH)
DCR max4
(Ohms)
Leakage
L max (µH)5
Turns ratio6 Ipk3
(A)  
Output7
pri     drive  pri : sec pri : drive pri : bias
HA3801-AL_
Not for new
designs

see HA3801-BL
166.5 150.0 0.735 (pri)
0.0225 (sec)
0.510 (drive)
0.985 (bias)
2.50 0.45 6.5 : 1 3.7 : 1 2.0 : 1 1.2 3.3 V, 3 A
HA3802-AL_
Not for new
designs

see HA3802-BL
150.0 135.0 0.520 (pri)
0.0275 (sec)
0.525 (drive)
0.770 (bias)
2.00 0.40 5.0 : 1 3.2 : 1 2.25 : 1 1.2 5.0 V, 2 A
HA3803-AL_
Not for new
designs

see HA3803-BL
166.5 150.0 0.760 (pri)
0.101 (sec)
0.500 (drive)
1.10 (bias)
2.05 0.245 2.0 : 1 4.0 : 1 2.0 : 1 1.2 12 V, 0.83 A
1 When ordering, please specify termination code: e.g. HA3801-ALD
  Termination: L = RoHS compliant tin-silver (96.5/3.5) over tin over nickel over phos bronze
Special order, added cost: T = RoHS tin-silver-copper (95.5/4/0.5) or
S
= non-RoHS tin-lead (63/37).
Packaging: D = 13" reel, machine-ready 
EIA-481 embossed plastic tape (200 parts per full reel).
B = Less than full reel
In tape, but not machine-ready. To have a leader and trailer added ($25 charge), use code letter D instead.
2 Inductance is for the primary, measured at 100 kHz, 1.0 Vrms, 0 A.
3 Ipk: Peak primary current drawn at minimum input voltage.
4 DCR for the secondary is with windings connected in parallel, measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance for the primary is with the secondary and drive windings shorted; leakage inductance for the drive winding is with the secondary windings shorted.
6 Turns ratio is with the secondary windings connected in parallel.
7 Output is with the secondary windings connected in parallel. Bias winding output is 10 V, 20 mA.
Output of the drive winding: 5.6 V, 10 mA (HA3801-AL); 7.5 V, 10 mA (HA3802-AL); 6.0 V, 10 mA (HA3803-AL)
8 Ambient temperature range: –40°C to +125°C
9 Storage temperature range: Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
10 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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Updated: April 11, 2017