Datasheet 3D Models

Flyback Transformers

for Linear Technology LT3751

Designed for use with Linear Technology LT3751 Capacitor Charger Controller
For charging capacitors to 500 V
Coilcraft DA2033-AL and DA2034-AL are specified for 5 A and 10 A applications

COTS Plus tin-silver-copper and tin-lead terminations available

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Count	Unit price
1	$11.98
240	$9.66
480	$6.50
1200	$5.45

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Typical Application

Works with Analog Devices LT3751

Part number	Input Voltage	Output	Fsw
GA3460-BL	12 V — 24 V	500 V	50 kHz
GA3459-BL	5 V — 24 V	500 V	50 kHz

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (µH) 1 (Tolerance: ±10%)	Inductance min (µH)	DCR max (mΩ) 2		Leakage Inductance max (µH) 3	Turns Ratio 4	Isolation Voltage (Vrms) 5
Part number (Hover for schematics)	Inductance at 0A (µH) 1 (Tolerance: ±10%)	Inductance min (µH)	Pri	Sec	Leakage Inductance max (µH) 3	Pri : Sec	Isolation Voltage (Vrms) 5
GA3460-BL	2.5	2.3 @ 50 A	5.6	400	0.06	1 : 10	1500
GA3459-BL	5.0	4.3 @ 20 A	7.7	515	0.10	1 : 10	1500

Notes

Inductance is measured at 50 kHz, 0.1 Vrms.
DCR for the primary is with the windings connected in parallel.
Leakage inductance is for the primary with windings connected in parallel and with the secondary winding shorted.
Turns ratios are with the primary windings connected in parallel.
1500 Vrms, one minute interwinding isolation

Termination:

RoHS tin-silver (96.5/3.5) over tin over nickel over phos bronze. 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

Primary windings to be connected in parallel
on PC board.
Connect pin 6 to ground.

Note: The primary windings of these transformers
DO NOT have the same pinouts

Physical characteristics

General specification

Core Material:

Ferrite

Weight:

24.2 – 27.5 g

Packaging:

24 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:

Tested with pure water or alcohol only. More info.