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TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
3.9 24V/5V Converter Circuit
Fig. 3.10 24V/5V Converter Circuit
Figure 3.9 is the DC-TO-DC (DC24V to DC 5V) converter circuit, which is a step-down
system circuit structure. U24 is the DC-TO-DC converter IC, which can convert voltage by
using PWM control mode. The output voltage is dependent on R3 and R4.