30 to 500W Planar Transformers
Description
Payton size 71 provides 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) |
|---|---|---|---|---|---|
| 30W, Flyback CCM at 300kHz 500W Forward at 200 kHz | L=29-45 | 40 gr. | 500 Vdc - 4k Vrms | 600 Vpeak max. | 40A 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 | 13 | 25 | 47 | 75 | 95 | 120 | 187 |
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 | 8 °C/W | 4 °C/W |
Example: Transformer Type T71 P.N. 514280
This T71DC-4-6C, 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 | 387 W (24.2Vdc@16Adc) |
| Operating frequency | 300 kHz |
| Input voltage range | 18-36V |
| Topology | Full Bridge, ZVT. |
| Max. Volt-Sec. product | 116V- µSec |
| Duty cycle | 0.82 |
| Primary current | 12.8Arms |
| Secondary output current | 16Arms |
| Primary to Half Sec. ratio | 4:3 |
| Dielectric strength pri. to sec.+core | 500Vdc |
| sec. to core | 500Vdc |
| Ambient temperature | -55 °C to -+85 °C |
| Total losses (With 85 °C heat sink) | 5W |
| Hot spot temperature (With 85 °C heat sink) | 125 °C |
| Weight | 36 gr. |
