Datasheet 3D Model

GA3136-BL Flyback Transformer

for Texas Instruments UCC1809/2809/3809 Primary Side Controller

Developed for TI UCC1809/2809/3809 Primary Side Controller
Designed for 50 W dc-to-dc fixed frequency current mode switching power supplies

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Count	Unit price
1	$7.74
240	$6.26
480	$4.24
1200	$3.56
2400	$3.23
4800	$2.96

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Typical Application

Works with Texas Instruments UCC1809/2809/3809

Input Voltage	Output 1		Power	Fsw
Input Voltage	Sec	Bias	Power	Fsw
22 V — 26 V	53 V , 1 A	12 V , 0.02 A	50 W	150 kHz

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 5.9 A (µH) 3	DCR max 4			Leakage Inductance max (µH) 5	Turns Ratio 6	Isolation Voltage (Vrms) 7
Part number (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min at 5.9 A (µH) 3	Pri (Ω)	Sec (mΩ)	Bias (mΩ)	Leakage Inductance max (µH) 5	Pri : Sec : Bias	Isolation Voltage (Vrms) 7
GA3136-BL	35.0	31.5	0.029	74.000	208.000	0.230	1 : 1.4 : 0.33	1500

Notes

Output is for the secondary winding. Output of the bias winding output is 12 V, 20 mA.
Inductance is measured at 150 kHz, 0.1 Vrms.
Peak primary current drawn at minimum input voltage
DCR for the primary is with the windings connected in parallel.
Leakage inductance is for the primary windings connected in parallel and with the secondary winding shorted.
Turns ratios are with the primary windings connected in parallel.
1500 Vrms, one minute isolation from primary to secondary windings.

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 +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 the PC board.

Physical characteristics

General specification

Core Material:

Ferrite

Weight:

27.1 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. For other solvents, see Doc787_PCB_Washing.pdf.

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