80 to 600W Planar Transformers
Description
Payton SIZE 55 provides a planar solution for medium power applications (such as telecommunication) providing 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) |
|---|---|---|---|---|---|
| 80W, forward at 150 kHz; 400W, full bridge at 300 kHz | L=28-45 W=27 H=6-12 | 40 gr. | 500 Vdc - 4k Vrms | 400 Vpeak max. | 50 A max. |
- Typical efficiency: 97-99%
- Recommended frequency range: 100 kHz - 2.5 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 | 9.5 | 18 | 34 | 56 | 72 | 94 | 140 |
AL values not listed are available upon request.
Typical Thermal Impedance For Different Cooling Conditions
| NATURAL COOLING (Hot Spot - Air) | BLOWING AIR 3 m/sec (Hot Spot-Air) | ONE SIDE HEATSINK (Hot Spot - Heatsink) | TWO SIDES HEATSINK (Hot Spot-Heatsink) |
|---|---|---|---|
| 22 °C/W | 12 °C/W | 7 °C/W | 3.5 °C/W |
Example: Transformer Type T55 DC P.N. 501694
This T55DC-9-2, medium power, low 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 | 600 W (12 Vdc@50 Adc) |
| Operating frequency | 300 kHz |
| Input voltage range | 180-350 V |
| Topology | Full Bridge, ZVT. (with current doubler rectifier) |
| Max. Volt-Sec. product | 376 V- µSec |
| Duty cycle | 0.64 |
| Primary current | 5.96 Arms |
| Secondary output current | 25 Arms |
| Primary to Sec. ratio | 9:2 |
| Dielectric strength pri. to sec.+core | 1500 Vds |
| Dielectric strength sec. to core | 500 Vds |
| Ambient temperature | -40 °C to +85 °C |
| Total losses (With 85 °C heat sink) | 4.7W |
| Hot spot temperature (With 85 °C heat sink) | 118 °C |
| Weight | 25 gr. |
