250W to 2.1kW Planar Transformers
Description
Payton SIZE 541 provides planar solution for medium to high power applications. It offers high efficiency, low EMI, excellent repeatability, low profile and weight with an operating temperature range of -40°C to +130°C.
Transformer Application
| POWER CAPACITY | DIMENSIONS (mm) | TYPICAL WEIGHT | DIELECTRIC ISOLATION | OPERATING VOLTAGE | OPERATING CURRENT (RMS) |
|---|---|---|---|---|---|
| 250W, half bridge at 60 kHz 2.1kW, full bridge at 150 kHz | L=42-80 W=43 H=10-38 | 90 gr. | Up to 4k Vrms | 500 Vpeak max. | 150 A max. |
- Typical efficiency: 97-99%
- Recommended frequency range: 100 kHz - 1.0 MHz.
- Topologies (in order of preference): Full bridge; Half bridge; Push-Pull; Forward; Flyback; Boost; Buck; Resonant topologies.
- Mounting Options: a. Horizontal, b. Vertical
Inductor Application
| STANDARD AL(nH/t2) | 1600 | 1000 | 630 | 400 | 315 | 250 | 160 |
|---|---|---|---|---|---|---|---|
| TYPICAL VALUE OF MAX. Amper Turns | 37 | 64 | 122 | 163 | 206 | 270 | 385 |
AL values not listed are available upon request.
Typical Thermal Impedance For Different Cooling Conditions
| NATURAL COOLING (Hot Spot - Air) | BLOWING AIR 3m/sec (Hot Spot-Air) | ONE SIDE HEATSINK (Hot Spot - Heatsink) | TWO SIDES HEATSINK (Hot Spot-Heatsink) |
|---|---|---|---|
| 12 °C/W | 6.5 °C/W | 3.6 °C/W | 1.8 °C/W |
EXAMPLE: Transformer Type T541 AC P.N. 516632
This T541AC-16-4C, high power, high input voltage, high frequency, small dimensional planar transformer is developed for a high power density DC-DC converter, providing the following specifications.
| Transformer Specifications | Value |
|---|---|
| Total output power | 1008 W (48Vdc @ 21Adc) |
| Operating frequency | 250-500 kHz |
| Input voltage range | 260-410 V. |
| Topology | Full bridge, LLC |
| Max. Volt-Sec. product | 2X776V- µSec |
| Duty cycle | 2x0.5 |
| Primary current | 3.5 Arms Sinusoidal |
| Sec. current | 17.5Arms |
| Primary to Half Sec. ratio | 16:2 |
| Dielectric strength pri. to sec.+core | 3000 Vdc |
| sec. to core | 500 Vdc |
| Ambient temperature | -40 °C to +85 °C |
| Total losses (With 60 °C heat sink) | 8W |
| Hot spot temperature (With 60 °C heat sink) | 120 °C |
| Weight | 120 gr. |
