50 to 400W Planar Transformers
Description
Payton SIZE 50 provides a planar solution for low to 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) |
|---|---|---|---|---|---|
| 50W, forward at 150 kHz 400W, full bridge at 300 kHz | L=28-45 W=22 H=6-11 | 25 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 | 11 | 22 | 37 | 69 | 79 | 101 | 150 |
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) |
|---|---|---|---|
| 23 °C/W | 13 °C/W | 7 °C/W | 3.5 °C/W |
EXAMPLE: Transformer Type T50 DC P.N. 16452
This T050DC-4-6C, medium power, 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 | 400 W (28 Vdc/14.3 Adc) |
| Operating frequency | 200 kHz |
| Input voltage range | 38.3-60 Vdc |
| Topology | Full Bridge |
| Max. Volt-Sec. product | 141.8 V- µSec |
| Duty cycle | 2*0.375 |
| Primary current | 13.58 Arms max. |
| Primary to half Sec. 1 ratio (sec. current, max - 11.27 Arms) | 4:3 |
| Dielectric strength pri. to sec.+core | 500 Vrms |
| sec. to core | 500 Vrms (Inferred from standard structure and other data) |
| Ambient temperature | 80 °C |
| Total losses (With 70 °C heat sink) | 4.2W |
| Hot spot temperature (With 70 °C heat sink) | 105 °C max. |
| Weight | 25 gr. |
