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LTPH245 Datasheet(PDF) 29 Page - Seiko Instruments Inc

Part # LTPH245
Description  LINE THERMAL PRINTER MECHANISM TECHNICAL REFERENCE
PDF  64 Pages
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Manufacturer  SII [Seiko Instruments Inc]
Direct Link  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

LTPH245 Datasheet(HTML) 29 Page - Seiko Instruments Inc

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3-16
3.5.4
Head Voltage
The printer has a built-in head driver IC. Table 3-8 shows the head voltage.
Table 3-8 Head Voltage
Item
Voltage Range
Head drive voltage
Vp
4.2 to 8.5 V
Head logic voltage
Vdd
4.5 to 5.5 V
3.5.5
Peak Current
Since the peak current (maximum current) may reach the values calculated using equation (2) when the
thermal head is driven, make sure that the allowable current for the cable material and the voltage drop
on the cables are well within the specified range.
Equation (2):
Ip:
Peak current (A)
N:
Number of dots that are driven simultaneously
Vp:
Head drive voltage (V)
RH:
Head resistance (
Ω)
N
× Vp
Ip=

RH



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