3 special circuit descriptions, 3-1 power circuit, Rev. 2.01 – BIXOLON 352plusA User Manual
Page 34
Rev. 2.01
- 34 -
SRP-350/352plusA&C
4-3 Special Circuit Descriptions
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)
No.
VOLTAGE
DESCRIPTION
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