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Overview
| Topology | Flyback Converter |
| Input voltage | 9-18 V |
| Switching frequency | 80-360 kHz |
| Output 1 | 20 V / 0.4 A |
| IC revision | G |
Description
This reference design presents an auxiliary power supply providing a unipolar output voltage adjustable between 15 V and 20 V with a maximum output power of 6 W. The optimized design is for driving high-voltage SiC-MOSFET and IGBT discrete devices as well as power modules in high power converters. The output voltage range covers the requiremens of different devices, and the design can be easiliy integrated in the gate driver system. In addition to the compact size and high efficiency, one of the main features of the design is the extremely low interwinding capacitance of the WE-AGDT 750318114 transformer down to 6.8 pF, which helps to achieve high CMTI rating (Common-Mode Transient Immunity). A high CMTI enables faster switching transitions without compromising the functionality of the system, helping to achieve smaller system size and higher efficiency of the high power converter, as demanded by trending applications in areas like e-mobility, renewable energy and industrial automation.
Features
- Extremely compact (27 x 14 x 14 mm)
- Input voltage range: 9 to 18 V
- Adjustable output voltage
- Validated results for three common output voltages:
- RD002-1: +15V/0V
- RD002-2: +18V/0V
- RD002-3: +20V/0V
- 4 kV primary-secondary Isolation
- WE-AGDT transformer with only 6.8 pF interwinding capacitance
- PSR Flyback topology with LT8302 (ADI Power by Linear)
- Two BoM variants: Standard and AEC-Q component qualification
- Two PCB Layout variants: single sided and double sided
Typical applications
- Battery charging stations
- AC motor inverter
- Solar inverters
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | VIN(V) | VOut1(V) | VOut2(V) | PO(W) | CWW 1(pF) | L(µH) | ISAT(A) | fswitch(kHz) | n | Version | IC Reference | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 50 V(DC), 470 pF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance470 pF | Capacitance±10% | Rated Voltage50 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length2 mm | Width1.25 mm | Height0.8 mm | Pad Dimension0.5 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 1 µF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance1 µF | Capacitance±10% | Rated Voltage50 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor10 % | Insulation Resistance0.1 GΩ | Ceramic TypeX7R Class II | Length2 mm | Width1.25 mm | Height1.25 mm | Pad Dimension0.5 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 10 µF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance10 µF | Capacitance±10% | Rated Voltage50 V (DC) | Size1206 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.005 GΩ | Ceramic TypeX5R Class II | Length3.2 mm | Width1.6 mm | Height1.6 mm | Pad Dimension0.6 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WE-AGDT Auxiliary Gate Drive Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-AGDT Auxiliary Gate Drive Transformer | – | – | – | SizeEP7 | Operating Temperature -40 °C up to +130 °C | – | – | – | Length11.3 mm | Width10.95 mm | Height11.94 mm | – | – | Input Voltage 18 - 36 | Output Voltage 115 V | Output Voltage 2-4 V | Total Output Power5 W | Interwinding Capacitance7 pF | Inductance27 µH | Saturation Current1.5 A | Switching Frequency 350 | Turns Ratio3.5:3.5:1 | VersionFlyback | IC ReferenceLM5180 | ||||
| WE-AGDT Auxiliary Gate Drive Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-AGDT Auxiliary Gate Drive Transformer | – | – | – | SizeEP7 | Operating Temperature -40 °C up to +130 °C | – | – | – | Length11.3 mm | Width10.95 mm | Height11.94 mm | – | – | Input Voltage 18 - 36 | Output Voltage 119 V | – | Total Output Power5 W | Interwinding Capacitance8.2 pF | Inductance27 µH | Saturation Current2 A | Switching Frequency 350 | Turns Ratio1:1.2 | VersionFlyback | IC ReferenceLM5180 | ||||
| WE-AGDT Auxiliary Gate Drive Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-AGDT Auxiliary Gate Drive Transformer | – | – | – | SizeEP7 | Operating Temperature -40 °C up to +130 °C | – | – | – | Length11.3 mm | Width10.95 mm | Height11.94 mm | – | – | Input Voltage 9 - 18 | Output Voltage 115 V | Output Voltage 2-4 V | Total Output Power3 W | Interwinding Capacitance7 pF | Inductance18 µH | Saturation Current1.6 A | Switching Frequency 350 | Turns Ratio2.25:3.5:1 | VersionFlyback | IC ReferenceLM5180 | ||||
| WE-AGDT Auxiliary Gate Drive Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-AGDT Auxiliary Gate Drive Transformer | – | – | – | SizeEP7 | Operating Temperature -40 °C up to +130 °C | – | – | – | Length11.3 mm | Width10.95 mm | Height11.94 mm | – | – | Input Voltage 9 - 18 | Output Voltage 119 V | – | Total Output Power3 W | Interwinding Capacitance6.8 pF | Inductance18 µH | Saturation Current1.95 A | Switching Frequency 350 | Turns Ratio1:2 | VersionFlyback | IC ReferenceLM5180 |