500W to 3.5kW Planar Transformers
Description
Payton SIZE 551 provides planar solution for 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) |
|---|---|---|---|---|---|
| 500W, Push-Pull at 100 kHz 3.5kW, full bridge at 250 kHz | L=52-95 W=53-78 H=13-30 | 200 gr. | Up to 4k Vrms | 700 Vpeak max. | 150 A max. |
- Typical efficiency: 97-99%
- Recommended frequency range: 80 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 | 58 | 100 | 180 | 268 | 333 | 420 | 586 |
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) |
|---|---|---|---|
| 7 °C/W | 4 °C/W | 2.6 °C/W | 1.3 °C/W |
Example: Transformer Type T551 AC P.N. 513696
This T551DC-15-3, high power, high input voltage, small dimensional planar transformer is developed for a high power density DC-DC converter, providing the following specifications:
| Transformer Specifications | Value |
|---|---|
| Total output power | 2596 W (16 Vdc@156 Adc) |
| Operating frequency | 72 kHz |
| Input voltage range | 195-435V |
| Topology | Full bridge ZVS, with current doubler |
| Volt-Sec. product | 2252V- µSec |
| Operating Duty cycle | 0.84 |
| Primary current (for 92% power supply effic.) | 19.3 Arms |
| Sec. current | 90 Arms |
| Primary to Sec. ratio (sec. current - 118 Arms) | 15:3 |
| Dielectric strength pri. to sec.+core | 2700 Vdc |
| sec. to core | 2700 Vdc |
| Ambient temperature | -40 °C to +105 °C |
| Total losses (With 65 °C heat sink) | 38W |
| Hot spot temperature (With 65 °C heat sink) | 145 °C |
| Weight | 350 gr. |
