UCC12040DVER Description

UCC12040 is a DC/DC power module with a 3-kVRMS basic isolation rating designed to provide efficient, isolated power to isolated circuits that require a bias 

supply with a well-regulated output voltage. The device integrates a transformer and DC/DC controller with a proprietary architecture to provide 500 mW (typical) of isolated power with low EMI. The UCC12040 integrates protection features for increased system 

robustness. The device also has an enable pin, synchronization capability, and regulated 5-V or 3.3-V output options with headroom. 

UCC12040DVER Features

High-density DC/DC module with optimized

integrated transformer technology

Input voltage range: 4.5 V to 5.5 V

Output voltages (selectable): 5.4 V, 5.0 V, 3.7 V, 3.3 V

Output power: 500 mW

Peak efficiency: 60%

Line regulation (typical): 1%

Load regulation (typical): 1.5%

Meets CISPR32 Class B EMI limits without ferrite beads on a 2-layer PCB

Spread spectrum modulation (SSM)

UCC12040DVER Applications

PLC analog input & output modules

Grid protection relays & smart breakers

Medical patient monitors

Isolated bias for digital isolators

Isolated bias for RS-485/RS-422/CAN transceivers

Isolated bias for voltage and current sensors