Datasheet 3D Model

GA3502 Flyback Transformer

for Maxim's PFC LED Driver

Featured on Maxim MAX16801 demonstration board
Designed for PWM Dimming of High-Brightness LEDs

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Count	Unit price
1	$3.63
240	$3.39
480	$3.11
1200	$2.56
2400	$2.19
4800	$2.01

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Typical Application

Works with Maxim MAX16801

Input Voltage	Output 1		Power	Fsw
Input Voltage	Sec	Bias	Power	Fsw
400 V	110 V , 0.4 A	18 V , 0.02 A	44 W	250 kHz

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 0.75 A (µH)	DCR max			Leakage Inductance max (µH) 3	Turns Ratio	Isolation Voltage (Vrms) 4
Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 0.75 A (µH)	Pri (Ω)	Sec (mΩ)	Bias (mΩ)	Leakage Inductance max (µH) 3	Pri : Sec : Bias	Isolation Voltage (Vrms) 4
GA3502-BL	800	720	1.283	361.000	146.000	6.60	1 : 0.35 : 0.06	1500

Notes

Output is for the secondary. Bias winding output is 18 V, 20 mA.
Inductance is for the primary (pins 1 – 3), measured at 250 kHz, 0.3 Vrms.
Leakage inductance is for the primary winding (pins 1 – 3) with the secondary winding shorted.
1500 Vrms, one minuteisolation, primary and bias windings to secondary winding

Termination:

RoHS-compliant. 260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations. Other terminations available at additional cost.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +125°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:

21.3 g

Packaging:

24 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.

PCB Washing:

Only pure water or alcohol recommended.

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