Description
Our ERL35 Transformer is a standard high-frequency ferrite transformer, acting as the core power conversion component inside all kinds of switching power supplies.
Furthermore, it works well with multiple circuit topologies such as half-bridge power conversion circuits.
For half-bridge circuits, two switching transistors generate 100kHz high-frequency pulse signals alternately.
In addition, the ERL35 high-frequency transformer converts these pulses into stable AC power output. The final output voltage depends fully on the winding turns ratio of this ERL35 Transformer.
Performance Parameters of ERL35 Transformer
- Operating Frequency: 50kHz–500kHz
- Rated Output Power: 20–400W
- Operating Temperature: -40°C to +125°C
- Storage Temperature: -25°C to +85°C
- Storage Humidity: 30%–95%
Specification
| Parameter | ERL25 | ERL28 | ERL35 | ERL40 |
| Core Model | ERL25 | ERL28 | ERL35 | ERL40 |
| Bobbin Type | Vertical / Horizontal, 5+5pin | Vertical / Horizontal, 5+5 / 6+6pin | Vertical / Horizontal, 5+5pin (Your Current Model) | Vertical / Horizontal, 6+6pin |
| Rated Power | 10–30W | 30–60W | 60–120W | 100–200W |
| Operating Frequency | 20kHz–150kHz | 20kHz–150kHz | 20kHz–150kHz | 20kHz–150kHz |
| Core Material | PC40 / PC44 /PC95 Manganese-Zinc Ferrite | PC40 / PC44/PC95 Manganese-Zinc Ferrite | PC40 / PC44 /PC95 Manganese-Zinc Ferrite | PC40 / PC44 /PC95 Manganese-Zinc Ferrite |
| Primary Inductance | 500–1200μH (Customizable) | 800–2000μH (Customizable) | 1500–3500μH (Customizable) | 2500–5000μH (Customizable) |
| Insulation Class | Class B (130°C) / Class F (155°C) | Class B / Class F | Class B / Class F | Class B / Class F |
| Withstand Voltage | Primary to Secondary: AC 3750V / 1min | Primary to Secondary: AC 3750V / 1min | Primary to Secondary: AC 3750V / 1min | Primary to Secondary: AC 3750V / 1min |
| Operating Temperature | -25°C ~ +125°C | -25°C ~ +125°C | -25°C ~ +125°C | -25°C ~ +125°C |
| Typical Applications | Mobile chargers, LED drivers, low-power adapters | Adapters, set-top box power supplies, industrial control power | Switching power supplies, industrial automation equipment, LED power supplies (Your Target Applications) | High-power power supplies, medical devices, communication equipment |
Core Structural Advantages of ERL35 Transformer
- It uses low-loss MnZn ferrite core to reduce core loss under 50kHz–500kHz high-frequency operation.
- Compact vertical skeleton takes up little PCB space and supports automatic pin soldering.
- Multi-layer winding design allows customized primary and secondary turns ratio for different output voltage demands.
- Low leakage inductance lowers electrical stress on peripheral MOSFET and capacitors, cutting the total BOM cost.
- 155℃ / 180℃ high-temperature enameled wire options meet industrial and medical insulation standards.
Key Working Characteristics of ERL35 Transformer
- Automatic current sharing: Parallel secondary windings balance current without extra balancing resistors, ideal for rectifier circuits.
- High current density: Low temperature rise under full continuous load to realize high power density in compact size.
- High conversion efficiency: Optimized winding layout minimizes power loss between primary and secondary windings.
- Stable heat dissipation: Well-designed core structure prevents overheating during long-hour continuous operation.
- High cost performance: Made of standard universal parts, simple assembly shortens production cycle.
Application of ERL35 Transformer
Furthermore, our ERL35 Transformer is widely adopted in multiple medium-power switching power supply equipment.
It acts as the core magnetic component for PC power supplies, LLC resonant converter modules, industrial communication power adapters and small industrial inverters.
In addition, this ERL35 high-frequency transformer also fits extra scenarios: LED drive power supplies, portable medical isolation power units, solar micro-inverters, low-power servo auxiliary power and laboratory test power modules.
Thanks to its stable 20–400W power output and wide temperature tolerance, it becomes the standard ferrite transformer for mass-produced medium-frequency power conversion equipment.
Customization Service of ERL35 Transformer
- Winding customization: Adjustable input/output turns ratio, multi-group secondary windings are available.
- Pin definition: Custom pin quantity and pin sequence for vertical DIP layout.
- Material options: PC40 / PC44 low-loss ferrite core, 155℃ / 180℃ high-temperature resistant enameled wire.
- Certification support: Produce following CE, RoHS, UL insulation safety standards; test reports can be provided on request.
- Flexible order: Small sample orders and mixed batch orders with other ERL series transformers are acceptable.
Matching Supporting Components
- Power inductors: CD, NR, RH series molded high-current inductors.
- Power semiconductors: MOSFET, IGBT, SiC/GAN chips, PWM driver IC and control MCU.
- EMI filter parts: Common mode chokes, high voltage film capacitors, power resistors.
- Auxiliary transformers: Small EDR, EE series low-power auxiliary transformers.
Our ERL35 Transformer complies with official MnZn ferrite power component design standards released by IEEE for high-frequency SMPS applications.
Details
Real product shot of vertical pin ERL35 transformer with compact skeleton winding
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