The 78253 series of converter transformers are specifically designed for use with the MAX253 chip set to provide isolated power supplies. The 5V version can supply 1W and the 3.3V version can supply 500mW. A centre tapped secondary winding allows for full bridge, half bridge or voltage doubling. The surface mount devices are fully compatible with CECC00802 to 280°C which allows them to be placed and reflowed with IC’s thus reducing time and cost in production.
This document is a datasheet for the C&D Technologies 78253 series of converter transformers, specifically designed for use with the MAX253 chip set to provide isolated power supplies. The series includes 3.3V and 5V versions capable of supplying 500mW and 1W respectively, with isolation voltages up to 4kV for the V variants and 1.5kV for the M variants. The transformers feature a toroidal construction, industrial standard pinout, and are available in both DIP and surface mount packages compatible with CECCO0802 standards.
| Input Voltage | 3.3V and 5V Versions |
|---|---|
| Isolation Voltage (M) | 1500VDC |
| Isolation Voltage (V) | 4000VDC |
| Frequency Range | to 500kHz |
| Operating Temperature | -40°C to 85°C |
| Storage Temperature | -50°C to 125°C |
| Package Material | UL 94V-0 |
The transformers are specifically designed for use with the MAX253 chip set.
The maximum operating free air temperature is 85°C.
The isolation voltage for the 78253/XX(M) models is 1500VDC.