3D Model Datasheet

HTX7045C LLC Half-Bridge Transformers

For isolated gate driver bias supply

HTX7045C Series transformers feature a chip-style construction – a significant advancement over traditional core and bobbin designs that not only reduces the size of the component, but also streamlines the manufacturing process, resulting in a more cost-effective solution.

It offers low interwinding capacitance (as low as 0.7 pF), making it particularly well-suited for use in isolated gate driver bias supplies employing the open-loop LLC topology to achieve ultra-low EMI noise and high CMTI (Common Mode Transient Immunity). These characteristics make it especially beneficial for high-frequency switches including SiC, GaN and IGBT technologies.

The HTX7045C is AEC qualified, making it ideal for automotive traction inverters and motor controls, automotive on-board chargers (OBC), EV charging stations, battery management systems (BMS), automotive DC-DC converters and wide range of other automotive and industrial applications.

Low interwinding capacitance to minimize EMI and achieve high CMTI (Common Mode Transient Immunity)
Optimized for isolated bias supplies for SiC and GaN gate drivers, such as Texas Instrument UCC25800-Q1
Ideal for automotive OBC and traction Inverters in EV/HEV
Highly automated for cost-effective and exceptional quality and reliability
2800 Vrms, 4000 VDC, one minute isolation (hipot) between primary and secondary windings.
AEC-Q200 (–40°C to +125°C)

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Part number

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Count	Unit price
1	$3.42
100	$2.79
350	$2.09
700	$1.26
1000	$0.98

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

Termination

R = Tin over nickel over silver glass frit

Packaging

C = 7" machine-ready reel

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Typical Application

Works with Texas Instruments UCC25800

Input Voltage
9 V — 34 V

Specifications

Electrical specifications at 25°C.

Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±30%)	DCR max (Ω) 3		Leakage Inductance ±20% (µH) 4		Turns Ratio	Capacitance max (pF) 5	Volt-time product (V-µs)	Irms (mA) 6	Isolation Voltage (Vdc) 7
Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±30%)	Pri	Sec	Pri	Sec	Pri : Sec	Capacitance max (pF) 5	Volt-time product (V-µs)	Irms (mA) 6	Isolation Voltage (Vdc) 7
HTX7045C-753ARC	75	0.35	0.35	8.5	8.5	1 : 1	0.75	33.9	730	4000
HTX7045C-104ARC	100	0.40	0.40	9.5	9.5	1 : 1	0.9	38.8	680	4000
HTX7045C-124DRC	120	0.42	0.28	12.5	5.5	1 : 0.67	0.7	38.8	660	4000
HTX7045C-124ERC	120	0.42	0.32	12.0	6.5	1 : 0.75	0.7	45.3	660	4000
HTX7045C-124FRC	120	0.42	0.35	11.0	7.5	1 : 0.83	0.75	38.8	660	4000
HTX7045C-134BRC	130	0.44	0.17	15.0	2.5	1 : 0.4	0.7	45.3	660	4000
HTX7045C-144CRC	140	0.45	0.23	15.0	3.5	1 : 0.5	0.75	45.3	640	4000

Notes

When ordering, please specify turns ratio and packaging codes: e.g. HTX7045C-144CRC
Turns ratio: A = 1 : 1, B = 2.5 : 1, C = 2 : 1, D = 1.5 : 1, E = 1.33 : 1, F = 1.2 : 1
Inductance measured at 100 kHz, 0.1 Vrms, 0 ADC on an Agilent 4263B (or equivalent) with a Coilcraft CCF1546 test fixture.
DCR is measured on a Keithley 580 Micro-ohmmeter (or equivalent).
Leakage Inductance LL is measured at 100 KHz, 0.1 Vrms on an Agilent 4263B (or equivalent) with a Coilcraft CCF1546 test fixture, Sec is shorted for PRI LL / PRI is shorted for SEC LL.
Capacitance Cp is measured at 250 KHz, 0.1 Vrms on Voltech with CCF1611 test fixture.
Current that causes a 40°C rise from 25°C when applied to the primary winding with secondary current defined by the turns ratio.
2800 Vrms, 4000 VDC; one minute isolation (hipot) measured between primary and secondary. 4.9 mm creepage and clearance Material Group 1 (CTI>600).

Termination:

RoHS compliant tin over nickel over silver glass frit.

Packaging:

C = 7" machine-ready reel
EIA 481 embossed plastic tape (350 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
D = 13" machine-ready reel
EIA 481 embossed plastic tape. Factory order only, not stocked (1500 parts per full reel).

Environmental

Environmental:

RoHS compliant , halogen free

Ambient temperature range:

−40°C to +125°C

Storage temperature range:

Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C

Maximum part temperature:

+125°C

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
7" (178 mm)	13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
350	1500*	178/330	60/100	13	22,4	16,4	16	8	4	2	5,5	0,40

* Special order

General specification

Core Material:

Ferrite

Weight:

0.53 − 0.54 g

Packaging:

350/7" reel; 1500/13" reel Plastic tape: 16 mm wide, 0.4 mm thick, 8 mm pocket spacing, 5.5 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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HTX7045C LLC Half-Bridge Transformers

For isolated gate driver bias supply

Selected configuration not available

Typical Application

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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