Application Solutions

24V input DC-DC converter provides 5V for secure bank card printer

Posted by Chris on August 11, 2022

Losing a credit or bank card can cause a great deal of inconvenience, especially when travelling away from home. Financial institutions can now print and provide a replacement using a highly secure instant issuance card printer in their branches. Bank staff can produce these cards with the security chip for PIN and contactless payments.

Card printers often use an AC-DC 24V power supply to run the print heads and motor drives but require 5V for the control board ICs and processors. Developers of a new secure card printer required a 30W DC-DC converter that would operate from the 24V motor supply and deliver a clean, regulated 5V output.

The engineers contacted their local TDK-Lambda salesperson, who suggested the CCG30-24-05S. Its compact 25.4 x 25.4 mm footprint takes up minimal PCB space, and the six-sided shielded case reduces radiated EMI, which may cause disturbance to the electronics. The CCG’s wide 9 to 36V input range would enable a steady 5V output, even if a card jam caused the motor to stall and significantly lower the 24V power supply output voltage.

TDK-Lambda offers a wide range of isolated PCB mount DC-DC converters.