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Q4338-BL

Flyback Regulator Transformer

RoHS compliant
  • For flyback regulator applications using LM258X SIMPLE SWITCHER®
  • Recommended and approved by National Semiconductor
  • Custom versions available
Buy Now:
Count Unit price
1 $4.31
250 $3.08
500 $2.39
1000 $1.92
2500 $1.74
5000 $1.59

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
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Typical Application

Works with Texas Instruments LM258X (T5)

Input Voltage Output Power Fsw
Sec1 Sec2 Sec3
18 V 36 V 5 V , 1.8 A 12 V , 0.25 A 12 V , 0.25 A 15 W 100 kHz

Specifications

Electrical specifications at 25°C.

Part number
(Hover for schematics)
Inductance
at 0A (µH)
(Tolerance: ±15%)
Inductance
min at   3 A (µH)
DCR max (Ω) 1 Leakage
Inductance
max (µH) 2
Turns Ratio Isolation
Voltage (Vrms) 3
Pri Sec1 Sec2 Sec3 Pri : Sec1 : Sec2 : Sec3
Q4338-BL 66.0 59.4 0.090 0.039 0.580 0.600 3.5 1 : 0.5 : 1.167 : 1.167 500
Notes
  1. DCR measured at 25°C. For other operating temperatures,
    use this DCR at Temperature calculator.
  2. Leakage inductance measured across the primary at 0.10 Vrms, 100 kHz.
  3. 500 Vrms isolation between windings.

Termination:

  • RoHS-compliant – Tin-silver over tin over nickel over phos bronze.
  • COTS Plus tin-silver-copper and tin-lead terminations available.
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: −40°C to +85°C
Packaging trays: −40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Schematics

q4338s-(2).gif

Physical characteristics

lm258l1d.gif

dims_inches_mm-(3).gif

General specification

Core Material:
Ferrite
Weight:
11.5 g

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.
PCB Washing:
Tested with pure water or alcohol only. More info.