Datasheet 3D Models

ZA9709 and WA8427 Push-Pull Transformer

for Texas Instruments SN6505B Push Pull Driver

Coilcraft's ZA9709 and WA8427 miniature, low-profile transformer is designed for use with 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 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 ZA9709 and WA8427 are AEC Grade 1 qualified, making it an ideal solution for DC-DC converters in EV/HEV applications.

Designed for use with SN6505B Push Pull Driver by Texas Instruments
Low profile and center-tapped push-pull transformers for isolated power supply
Operates at 400 kHz with 2.25 – 5.5 V input
2500 Vrms, one minute high isolation (hipot) winding to winding
AEC-Q200 qualified

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Count	Unit price
1	$4.34
100	$3.47
250	$2.82
500	$2.35
900	$1.98
2700	$1.69
5400	$1.47

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

Termination

E =Tin-silver-copper over tin over nickel over phos bronze

Packaging

D = 13" machine-ready reel

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Typical Application

Works with Texas Instruments SN6505B

Part number	Input Voltage	Output	Power	Fsw
ZA9709-AED	2.25 V — 5.5 V	3.3 V , 1 A	3.3 W	400 kHz
WA8427-AED	2.2 V — 5.5 V	5 V , 1 A	5 W	400 kHz

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
ZA9709-AED	145	0.076	0.128	0.25	1 : 1.67	8.64	2500
WA8427-AED	145	0.076	0.100	0.25	1 : 1.11	8.64	2500

Notes

Inductance is for the primary, measured at 100 kHz, 0.01 Vrms, 0 Adc.
Leakage inductance is measured between pins 1 and 3 at 100 kHz, 0.1 Vrms with secondary pins shorted.
Volt-time product is for primary windings, between pin 1 and 3.
2500 Vrms, one minute isolation (hipot) between primary and secondary windings.

Termination:

RoHS-compliant. 260°C compatible. RoHS tin-silver-copper over tin over nickel over phos bronze. Other terminations available at additional cost.

Packaging:

D = 13″ machine ready reel. EIA-481 embossed plastic tape. (900 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).

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 + temperature 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
900	330	100	13	30,4	24,4	24	16	4	2	4,6	0,4

General specification

Core Material:

Ferrite

Weight:

0.60 – 0.65 g

Packaging:

900 per reel, 13″ reel Plastic tape: 24 mm wide, 0.4 mm thick, 16 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.

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ZA9709 and WA8427 Push-Pull Transformer

for Texas Instruments SN6505B Push Pull Driver

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

Warning