3D Model Datasheet

Isolation Transformer

for Texas Instruments SN6501 and SN6505B Push-Pull driver

Coilcraft's UA825x miniature, low-profile transformers are designed for use with SN6501 and SN6505B transformer drivers from Texas Instruments. The center-tapped push-pull transformer features high isolation voltage and high efficiency for isolated power supplies. It is driven by the SN6505B from a 3.3 V or 5.0 V power supply and provides high isolation at 2500 Vrms across the isolation barrier for interfaces such as CAN, RS-485, RS-422, RS-232, SPI, I2C , and low-power LAN in industrial and automotive applications. The UA825x is AEC Grade 1 qualified, making it an ideal solution for DC-DC converters in EV/HEV applications.

Developed for Texas Instruments SN6501 and SN6505B Push-Pull driver
Low profile and center-tapped push-pull transformers for isolated power supply
2500 Vrms, one minute high isolation (hipot) winding to winding
AEC-Q200 Grade 1 (–40°C to +125°C)

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Typical Application

Works with Texas Instruments SN6501 and SN6505B

Part number	Input Voltage	Primary voltage	Secondary voltage	Output
UA8251-AED	3.3 V	3.3 V	3.3 V	3.3 V
UA8252-AED	5 V	5 V	5 V	5 V
UA8253-AED	3.3 V	3.3 V	5 V	5 V
UA8254-AED	3.3 V	3.3 V	3.3 V	3.3 V
UA8255-AED	3.3 V	3.3 V	5 V	5 V

Specifications

Electrical specifications at 25°C.

Part number (Hover for schematics)	Inductance at 0A (µH) 1	DCR max (Ω)		Leakage Inductance max (µH) 2	Turns Ratio	Volt-time product (V-µs) 3	Isolation Voltage (Vrms) 4
Part number (Hover for schematics)	Inductance at 0A (µH) 1	Pri	Sec	Leakage Inductance max (µH) 2	Pri : Sec	Volt-time product (V-µs) 3	Isolation Voltage (Vrms) 4
UA8251-AED	1050	0.306	0.334	0.35	1 : 1.13	10.4	2500
UA8252-AED	900	0.320	0.360	0.35	1 : 1.076	11.5	2500
UA8253-AED	900	0.320	0.550	1.2	1 : 1.693	11.5	2500
UA8254-AED	900	0.320	0.440	1.0	1 : 1.308	11.5	2500
UA8255-AED	900	0.320	0.670	1.7	1 : 2	11.5	2500

Notes

Inductance is for primary windings measured at 10 kHz, 0.05 Vrms, 0 Adc.
Leakage inductance measured between pins 1 and 3 at 100 kHz, 0.1 Vrms with secondary pins shorted.
Volt-time product is for the primary, between pin 1 and 3.
One minute isolation (hipot) primary windings to secondary windings.

Termination:

RoHS tin-silver-copper over tin over nickel over phos bronze.

Packaging:

1000 per 13″ reel. Plastic tape: 24 mm wide, 0.4 mm thick, 12 mm pocket spacing, 4.6 mm pocket depth.

Environmental

Environmental:

RoHS compliant , halogen free

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +165°C
Tape and reel packaging: –40°C to +80°C

Maximum part temperature:

+165°C (ambient + temp rise)

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

See FIT/MTBF Calculations

Schematics

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
1000	330	100	13	30,4	24,4	24	12	4	2	4,6	0,4

General specification

Core Material:

Ferrite

Weight:

0.3 – 0.4 g

Packaging:

1000 per 13″ reel. Plastic tape: 24 mm wide, 0.4 mm thick, 12 mm pocket spacing, 4.6 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:

Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

Isolation Transformer

for Texas Instruments SN6501 and SN6505B Push-Pull driver

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Related product series

Transformers