Bixolon SRP-350 User Manual

 

 
4-3-1 Power Circuit 
 
This system is operated under 100Vac or 240Vac. The power circuit supplies the three differential DC voltage 
sources. 
 

 

 

[Figure 4-3 Power Block Diagram] 

 
1) Drawer Driving and Feed, Auto Cutter Motor Voltage, TPH Driving Voltage : +24VDC 
+24VDC is supplied from SMPS. This Voltage is smoothed by capacitors (CL1). 
This voltage is used as a Cash Drawer Solenoid Driving voltage, Step motor driving voltage and a source 
voltage of the other voltage sources and TPH Driving Voltage. 
 
2) Voltage : +7.8V (CPU Download Voltage) 
Change the input 24V to 7.8V by a regulation. U1(LM2575S-ADJ) 
 
3) Logic IC Driving Voltage: +5V 
Change the input 7.8V to 5V by a regulation. U2(BA17805-E2) 
 
4) CPU, Flesh, SRAM, Reset Voltage: +3.3V 
Change the input 7.8V to 3.3V by a regulation. U3(BA033FP-E2) 
 
5) USB core Voltage: +2.5V 
Change the input 5V to 2.5V by a regulation. U202(BH25FB1WHFV) 

1 

VPP(+24VDC) 

Cash Drawer Solenoid Driving / Step Motor Voltage 

2 

VTH(+24VDC) 

Thermal Printer Head (TPH) Voltage 

3 

Vdw(+7.8VDC) 

CPU Download Voltage 

4 

Vcc(+5VDC) 

Logic, Sensor Voltage 

5 

Vdd(+3.3VDC) 

CPU, Flesh, SRAM, Reset Voltage 

6 

Vdd(+2.5VDC) 

USB core Voltage