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Q4435-BL Surface Mount

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 $5.23
250 $4.35
500 $3.63
1000 $3.02
2500 $2.52
5000 $2.02

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

. in stock, ready to ship today.
Request a Sample:

Typical Application

Works with Texas Instruments LM258X (T1)

Input Voltage Output Power Fsw
4 V 6 V 5 V , 1.6 A 8 W 100 kHz

Specifications

Electrical specifications at 25°C.

Part number Inductance
at 0A (µH)
(Tolerance: ±15%)
Inductance
min at   4.85 A (µH)
DCR max (Ω) 1 Leakage
Inductance
max (µH) 2
Turns Ratio Volt-time
product (V-µs)
Isolation
Voltage (Vrms) 3
Pri Sec Pri : Sec
Q4435-BL 22 19 0.020 0.025 0.7 1 : 1 166.5 500
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 – 260°C compatible. Tin-silver over tin over copper clad steel.
  • 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
Tray packaging: –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

q4435s.gif

Physical characteristics

lm258smd.gif
dims_inches_mm.gif

General specification

Core Material:
Ferrite
Weight:
9.0 g
Packaging:
49 parts per tray

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.
Recommended Pick & Place Nozzle:
......
PCB Washing:
Tested with pure water or alcohol only. More info.