3D Model Datasheet

Flyback Transformers

for STMicroelectronics PM8803

Designed for 20 Watt applications
Operates in continuous conduction mode at 250 kHz with 42 – 57 V input voltage

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Count	Unit price
1	$4.38
175	$3.76
350	$3.27
700	$2.85
1400	$2.21
2800	$1.89

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

Packaging

D = 13" machine-ready reel

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Typical Application

Works with STMicroelectronics PM8803

Part number	Input Voltage	Output 1		Power	Fsw
Part number	Input Voltage	Sec	Bias	Power	Fsw
HA3691-AL_	42 V — 57 V	5 V , 4 A	10 V , 0.02 A	20 W	250 kHz
JA4173-AL_	42 V — 57 V	3.3 V , 6 A	10 V , 0.02 A	20 W	250 kHz

Specifications

Electrical specifications at 25°C.

Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±10%)	Inductance min at 1.3 A (µH)	DCR max (Ω) 4			Leakage Inductance max (µH) 5	Turns Ratio 6	Isolation Voltage (Vrms) 7
Part number 2 (Hover for schematics)	Inductance at 0A (µH) 3 (Tolerance: ±10%)	Inductance min at 1.3 A (µH)	Pri	Sec	Bias	Leakage Inductance max (µH) 5	Pri : Sec : Bias	Isolation Voltage (Vrms) 7
HA3691-AL_	100	90	0.185	0.009	0.340	0.81	1 : 0.25 : 0.469	1500
JA4173-AL_	100	90	0.211	0.006	0.404	1.6	1 : 0.156 : 0.5	1500

Notes

Output of the secondary is with the windings connected in parallel. Bias winding output is 10 V, 20 mA.
When ordering, please specify packaging code: HA3691-ALD.
Inductance measured at 250 kHz, 0.2 Vrms, 0 Adc.
DCR for the secondary is with windings connected in parallel.
Leakage inductance is for the primary and is measured with the secondary shorted.
Turns ratio is with the secondary windings connected in parallel.
1500 Vrms, one minute isolation from primary and bias to secondary.

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.

Packaging:

D = 13″ machine-ready reel. EIA-481 embossed plastic tape (175 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +85°C

Storage temperature range:

Component: –40°C to +85°C.
Tape and reel packaging: –40°C to +80°C

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Schematics

Secondary windings to be connected
in parallel on the PC board.

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
175	330	100	13	38,4	32,4	32	28	4	2	12,93	0,5

General specification

Core Material:

Ferrite

Weight:

6.5 g

Packaging:

175 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth

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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Flyback Transformers

for STMicroelectronics PM8803

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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Warning