3D Model Datasheet

JA4429 Flyback Transformer

for Linear Technology LT3799

Developed for Linear Technology for use with the LT3799 Isolated LED Controller with active power factor correction
Mounted on LT3799 Demo Board
Universal input; 24 Watt output

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Typical Application

Works with Analog Devices LT3799

AC Input Voltage	Output 1		Power	Fsw
AC Input Voltage	Sec	Bias	Power	Fsw
85 V — 265 V	24 V , 1 A	24 V , 0.02 A	24 W	100 kHz

Specifications

Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 1.3 A (µH)	DCR max (Ω) 3			Leakage Inductance max (µH) 4	Turns Ratio	Isolation Voltage (Vrms) 5
Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 1.3 A (µH)	Pri	Sec	Bias	Leakage Inductance max (µH) 4	Pri : Sec : Bias	Isolation Voltage (Vrms) 5
JA4429-AL	400	320	0.252	0.126	0.149	7.5	1 : 0.24 : 0.24	3000

Notes

Output is for the secondary. Bias winding output is 24 V, 20 mA.
Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc using an Agilent/ HP 4263B impedance analyzer or equivalent.
DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
Leakage inductance is for the primary and is measured with the secondary shorted.
Isolation: 3000 Vrms, one minute primary to secondary; 500 Vrms primary to bias, tested for one minute

Termination:

RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations. Other terminations available at additional cost.

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):

See FIT/MTBF Calculations

Schematics

Physical characteristics

General specification

Core Material:

Ferrite

Weight:

13.9 g

Packaging:

100 per tray

Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

PCB Washing:

Only pure water or alcohol recommended

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