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No-Opto Flyback Transformers

for Texas Instruments LM25180 and LM5180

RoHS compliant
  • Optimized for LM25180 and LM5180 flyback converters from Texas Instruments
  • Five output versions for various single-output designs with 4 – 65 V input
  • Eliminates auxiliary winding for simple and reliable converter designs
  • 1500 Vrms, one minute isolation (hipot) between primary and secondary
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Typical Application

Works with Texas Instruments LM25180 and LM5180

Part number Input Voltage Output Power Fsw
YA9033-ALD 4 V 65 V 8 V , 0.75 A 6 W 300 kHz
YA9034-ALD 4 V 65 V 12 V , 0.5 A 6 W 300 kHz
YA9035-ALD 4 V 65 V 15 V , 0.4 A 6 W 300 kHz
YA9036-ALD 4 V 65 V 24 V , 0.25 A 6 W 300 kHz
YA9037-ALD 4 V 65 V 48 V , 0.1 A 6 W 300 kHz

Specifications

Electrical specifications at 25°C.

Part number Inductance
at 0A (µH) 1
(Tolerance: ±10%)
Inductance
min at   2 A (µH) 2
DCR max (Ω) Leakage
Inductance
max (µH) 3
Turns Ratio Isolation
Voltage (Vrms) 4
Pri Sec Pri : Sec
YA9033-ALD 32.0 25.6 0.240 0.032 0.480 1 : 0.5 1500
YA9034-ALD 36.0 28.8 0.244 0.084 0.426 1 : 0.666 1500
YA9035-ALD 30.0 24.0 0.168 0.168 0.290 1 : 1 1500
YA9036-ALD 30.0 24.0 0.168 0.437 0.314 1 : 2 1500
YA9037-ALD 32.0 25.6 0.232 1.444 0.384 1 : 3 1500
Notes
  1. Inductance is for the primary, measured at 300 kHz, 0.1 Vrms, 0 Adc.
  2. Minimum inductance is for the primary, measured at 300 KHz, 0.1 Vrms, 2 Adc.
  3. Leakage inductance is for the primary winding with the secondary windings shorted.
  4. One minute isolation (hipot) measured between primary and secondary.

Termination:

  • RoHS tin-silver-copper over tin over nickel over phos bronze. Other terminations available at additional cost.

Packaging:

  • D = 13" machine-ready reel
    EIA 481 embossed plastic tape (300 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
Ambient temperature range:
−40°C to +85°C
Storage temperature range:
Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
Maximum part temperature:
+125°C (Ambient + temperature rise)
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Schematics

ya903xs.gif

Connect pin 5 to 6 and pin 7 to 8 on the PC board

Physical characteristics


ya903xd.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
300 330 100 13 38,4 32,4 32 20 4 2 10,69 0,5

General specification

Core Material:
Ferrite
Weight:
2 – 2.3 g
Packaging:
300/13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 20 mm pocket spacing, 10.69 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.