Datasheet 3D Model

HTX8045C LLC Half-Bridge Transformers

For isolated gate driver bias supply

HTX8045C Series transformers build on the proven chip-style construction of the HTX family - a major improvement over conventional core and bobbin designs. This compact, surface-mount configuration reduces component size and enhances manufacturing efficiency, allowing for more cost-effective production.

With higher isolation voltage compared to the HTX7045C and low interwinding capacitance (as low as 0.55 pF), the HTX8045C is 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 HTX8045C 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 as well as a 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 the UCC25800-Q1 from Texas Instruments and the MPQ18913 from Monolithic Power Systems
Ideal for automotive OBC and traction Inverters in EV/HEV
Designed and fabricated for systems mounted in harsh automotive conditions
AEC-Q200 qualified

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Part number

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Count	Unit price
1	$3.95
100	$3.23
400	$2.42
800	$1.46
1000	$1.14

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-Q1

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 3		Leakage Inductance ±20% (µH) 4		Turns Ratio	Capacitance max (pF) 5	Volt-time product (V-µs) 6	Isolation Voltage (Vrms) 8	Irms (mA)
Part number 1 (Hover for schematics)	Inductance at 0A (µH) 2 (Tolerance: ±30%)	Pri (Ω)	Sec (mΩ)	Pri	Sec	Pri : Sec	Capacitance max (pF) 5	Volt-time product (V-µs) 6	Isolation Voltage (Vrms) 8	Irms (mA)
HTX8045C-753ARC	75	0.345	345.000	9.1	9.1	1 : 1	0.55	21.6	3535	710
HTX8045C-104ARC	100	0.400	400.000	14.6	14.6	1 : 1	0.66	24.8	3535	790
HTX8045C-104DRC	100	0.410	270.000	12.5	5.6	1 : 0.67	0.64	25.9	3535	700
HTX8045C-104ERC	100	0.415	310.000	11.0	6.2	1 : 0.75	0.71	25.9	3535	670
HTX8045C-104FRC	100	0.405	335.000	10.7	7.4	1 : 0.83	0.76	25.9	3535	680
HTX8045C-114BRC	115	0.430	170.000	15.9	2.6	1 : 0.4	0.6	27	3535	650
HTX8045C-124CRC	120	0.450	225.000	14.8	3.8	1 : 0.5	0.68	28.1	3535	640

Notes

When ordering, please specify turns ratio and packaging codes: e.g. HTX8045C-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 HP4263B (or equivalent).
DCR is measured on a HP4263B (or equivalent).
Leakage Inductance LL is measured at 100 KHz, 0.1 Vrms with other windings shorted.
Interwinding capacitance is measured at 250 kHz, 0.1 Vrms across pins 1-4 with pins 2 and 3 open.
Volt-time is for reference and calculated with 2400 Gauss.
Current that causes a 40°C rise from 25°C when applied to the primary winding with secondary current defined by the turns ratio.
5000 VDC, 3535 Vrms; one minute isolation (hipot) measured between primary and secondary. 5.9 mm creepage and clearance Material Group IIIa (175 ≤ CTI < 400).

Termination:

RoHS compliant tin over nickel over silver glass frit.

Packaging:

C = 7" machine-ready reel
EIA 481 embossed plastic tape (400 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 (1200 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 +140°C
Tape and reel packaging: −40°C to +80°C

Maximum part temperature:

+140°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
400	1200*	178/330	60/100	13	30,4	24,4	24	8	4	2	5,5	0,40

* Special order

General specification

Core Material:

Ferrite

Weight:

0.53 − 0.54 g

Packaging:

400/7" reel; 1200/13" reel Plastic tape: 24 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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HTX8045C 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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