Product Specification Thermal Print Head Model: Mo-s2-8-5a2

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Product Specification Mitani Micronics Co. Ltd. Product Specification Thermal Print Head Model: MO-S2-8-5A2 Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 1 of 13 Product Specification Mitani Micronics Co. Ltd. 1. Description The specification is applicable to thermal print head, model MO-S2-8-5A2, on which CMOS driver IC’s are mounted. 2. Structure and Appearance 2.1 Structure Two-inch wide side face type thermal print head comprises of a high-density thick film printing technologies on alumina substrate, electric connection method and protective metal shield mounted on an aluminum heat sink. 2.2 Appearance No scratches, stains and/or warps affecting printing quality are allowed. 3. Mechanical Features 3.1 Dimension (1) Outline drawing see Fig. 1 (2) Flatness of heater not more than 20 μm 3.2 Heater Element (1) Number of heater element 384 dots (2) Size of heater element (X) 0.125 mm (Y) 0.130 mm (3) Pitch between each heater element 0.125 mm (4) Print width 48.0 mm 4. Electrical Features 4.1 Circuitry (1) Schematic diagram see Fig. 2 (2) Timing chart see Fig. 3 (3) Specifications for driver ICs see Table 1 (4) Number of driver ICs 64 bits x 6 (5) Logic supply voltage +5V (6) Data signal transfer clocked serial input (7) Clock rate 8 MHz Max. (8) Direction of print data inputs From left to right, Fig. 1 (9) Number of print line separation 6 strobes, Note 1 (10) Thermistor 103ET-2 R25 = 10.0 kΩ±3.0% Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 2 of 13 Product Specification Mitani Micronics Co. Ltd. B25 = 3,250 K ±1.0% Dissipation constant = 0.7 mW/˚ C Time constant = 3.4 s 4.2 Resistance of Heater Element (Single Dot) (1) Average resistance (Rav) 880 Ω± 5 % 4.3 Pin Connection see Table 2 5. Operation Characteristics 5.1 Standard Mechanical Parameters (1) Platen pressure 14.7 ~ 19.6 N/head (1.5 ~ 2.0 kgf/head) (2) Platen diameter 25 .0 mm (3) Platen hardness 30.0 ~ 50.0 Shore hardness 5.2 Standard Operating Parameters (1) Pulse width (heating strobe) (Pw) 0.4 ms (2) Total pulse duration 0.8 ms (3) Heater power consumption (P) 0.6 W/dot (4) Heater voltage (Vpp) 24.0 V (5) Heater element (dot) current 26.1 mA/dot (6) Thermal paper TP50KS-4HM or equivalent (Nippon Paper Industries Co., Ltd.) 5.3 Absolute Maximum Rating (1) Heater energy consumption 0.28 mJ/dot (2) Heater power consumption 0.71 W/dot (3) Heater voltage 26.0 V (4) Duty cycle 60.0 % (5) Heatsink temperature 80 ˚ C 6. Life Expectancy (1) Dot heating cycle (any one dot) 1.0 x 10 8 pulse (Note 2) (2) Abrasion life 100 km Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 3 of 13 Product Specification Mitani Micronics Co. Ltd. Note 1: Strobe 2 and Strobe 6 are internally connected with a jumper wire. Note 2: These figures result from life-test performed on MITANI-TPH’s in unconditioned “real world” –environment (see also section 5.1 and 5.2). Clean conditions (pollution free, heat controlled and/or anti-static discharge assembly or usage etc) can extend lifetime-figures significantly. 7. Environment (1) Operating temperature - 10 ~ + 50 ˚ C (2) Operating humidity (non condensing) 10 ~ 90 %RH (3) Storage temperature - 20 ~ + 80 ˚ C Table 1 CMOS driver IC Min. Typ. Max. Parameter Symbol Supply voltage Vcc 4.5 5.0 5.5 V Consumption current Icc - 3.0 7.0 mA Input voltage VIH Note 3 - Vcc V VIH = Vcc fCLK = 4 MHz Note 3: 0.7 Vcc VIL 0.0 - Note 4 V Note 4: 0.3 Vcc IIH - - 0.5 μA Vcc = 5.0 V IIL - - 0.5 μA Vcc = 5.0 V VDO 0.0 24.0 26.4 V = VTH VOLDO - 1.1 2.0 V at IOLDO = 100 mA IOLDO - - 100.0 mA Input current Driver output Voltage Current Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Unit Remarks Page 4 of 13 Product Specification Parameter Mitani Micronics Co. Ltd. Table 1 CMOS driver IC (continued) Symbol Min. Typ. Max. Unit Remarks Clock frequency fCLK - - 8.0 MHz Clock pulse width tw(CLK) 70.0 - - ns Data setup time tsu(D) 40.0 - - ns Data -> Clock Latch setup time tsu(L) 100.0 - - ns Clock -> Latch Latch pulse width tw(L) 100.0 - - ns Data hold time thold 10.0 - - ns Clock -> Data In Output delay time tp - 2.0 5.0 μs Strobe -> Data Out tw(CLK) Clock Data-In tsu(D) thold Latch tsu(L) Strobe tw(L) tp Hist1-3 Output Voltage Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 5 of 13 Product Specification Mitani Micronics Co. Ltd. Direction of printing-data input R001 R384 Heat Sink G C Head Cover Alumina Substrate F R H S D R001 R384 B A P MITANI 2 THERMAL PRINT HEAD A N #1 #14 E #13 #26 Heatsink Cover Alumina Substrate Magnification D #26 #14 #1 #13 Connector PS-26PE-D4LT1-PN1 Capacitor 16 V- 10 μF Capacitor 35 V- 10 μF 4-M3 x 3.5 (MAX) Occupied by thread Occupied by thread Thermistor O K L M Q J J I Item A B C D E F G H I J K L M N O P Q R S Dimension (Unit in mm) 2.0 ± 0.2 2.0 ± 0.1 11.5 ± 0.5 13.0 ± 0.5 5.0 ± 0.1 48.0 ± 0.1 5.5 ± 0.1 60.0 ± 0.1 48.0 ± 0.1 30.0 ± 0.1 9.0 ± 0.2 15.0 ± 0.1 17.0 ± 0.1 35.0 ± 0.3 ( 27.0 ) ( 4.5 ) 4.0 ± 0.2 2.0 ± 0.2 1.0 +0.5/-0.0 Fig. 1 Outline Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 6 of 13 2 2 Product Specification Mitani Micronics Co. Ltd. Table 2 Pin Connection Pin Description Pin Description 1 Thermistor (TM) 14 Thermistor (TM) 2 VTH 15 VTH 3 Data In 16 Clock 4 Strobe 1 17 Strobe 2, Note 6 5 Strobe 3 18 Strobe 6, Note 6 6 GND 19 GND 7 GND 20 GND 8 GND 21 GND 9 Strobe 4 22 Strobe 5 10 Latch 23 Hist 2 11 24 12 Hist 1 Vcc (+ 5 V) 25 Hist 3 Vcc (+ 5 V) 13 VTH 26 VTH Note 5. Connector model No. PS-26PE-D4LT1-PN1 (JAE) or equivalent Note 6. Pin #17 and Pin #18 are internally connected with a jumper wire. Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 7 of 13 Product Specification VTH Mitani Micronics Co. Ltd. R001 - R064 R065 - R128 R129 - R192 R193 - R256 R257 - R320 R321 - R384 IC #1 IC #2 IC #3 IC #4 IC #5 IC #6 + 35V 10μ F GND STROBE1 STROBE2 STROBE3 STROBE4 STROBE5 STROBE6 See Note 1. HIST1 HIST2 THERMAL DOT HISTORY CONTROL HIST3 LATCH LATCH LATCH LATCH DATA IN SHIFT REGISTER CLOCK VCC + 16V 10μ F GND - TM TM Fig.2 Schematic diagram Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 8 of 13 Product Specification Mitani Micronics Co. Ltd. Clock Data-In Latch Strobe 1-6 Hist 1-3 Off Off Driver Output On On Fig. 3 Timing Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 9 of 13 Product Specification Mitani Micronics Co. Ltd. General Precautions (1) Latch up prevention Latch-up conditions can cause failures and/or severe damage. To prevent latch-up each power should be applied to the thermal print head in the following sequences. Power On: (5 V) 4.75 V Power Off: (5 V) 4.75 V Vcc Vcc (VTH max.) 1.0 V max. VTH (VTH max.) VTH 2.0 ms min. 1.0 V max. 2.0 ms min. (2) Overload protection Strobes should always be at “L” level when the printline is not in contact with a media and/or during “switch-off” in order to prevent “burn-out” of the printing dots. (3) CMOS protection The unit is sensitive to static loads (CMOS IC´s). Utmost care should therefore be taken in order to prevent from any static discharge to the thermal print head during storage and handling. Static discharge may deadly damage the thermal print head. (4) Protective head cover A metal cover is used to protect the IC’s-area against mechanic force. It should never be removed nor should any high pressure or impact be loaded on the protective head cover. (5) Connector Misconnection or loose connection while operating the thermal print head might cause failures or even severe damages. (6) Mechanical protection The surface of the thermal print head must never be treated with objects hard enough to cause scratches. Penetration of the protective layers covering the heaters and/or the conductors may result in electrical shorts or conduction breaks. Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 10 of 13 Product Specification Mitani Micronics Co. Ltd. Thermal Dot History Control (TDHC) General Notes: 1. To read and understand the following requires some knowledge of Thermal Printing and the driving theory of thermal dot-line printer heads. 2. “Strobes 1~6” are usually connected to one common signal and are therefore just referred to as “Strobe” in the following. 3. If TDHC is not used, it is recommended to externally connect “Hist 1” and “Hist 2” to “Vcc” and “Hist 3” to “GND”, in order to prevent from noise- and/or crosstalk influences. DEFINITION Individual dots of a Thermal Print Head (TPH) have the tendency to accumulate heat after successive print cycles in fast sequence. Once this “excess heat” reaches the reaction temperature of the receiving substrate (i.e. thermal paper) the produced image will “smear”. To eliminate this phenomenon, the energy applied to a dot per printing cycle has to be limited. Besides simply slowing down the print speed (which is not really an acceptable option for demanding applications such as label- or ticket-printers), there are numerous methods to adjust the dot heating duration. One method is to track the thermal history of each individual dot and limit the dot energy per printing cycle relative to the so determined thermal status. That method is called Thermal Dot History Control (TDHC). INTERNAL TDHC General MITANI´s MO-series TPH´s features internal 3-level TDHC driver IC´s. Sufficient design freedom for nearly all standard system demands is provided, limiting the otherwise necessary effort for external software and hardware configuration. Further advantages are enhanced image appearance at higher print speeds and potentially less power consumption (smaller power supplies). Activating the TDHC-feature is not mandatory, so that conventional external sequencing methods can be used in existing applications or for complex requirements. Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 11 of 13 Product Specification Mitani Micronics Co. Ltd. Theory of operation The internal TDHC controls the energy of each individual dot relative to the present output data and the data history of the 2 previous print cycles. The combination of that data is stored in a 3-stage “Latch” register stack, and is present at the dot history control circuit as “Now Data”, “1st Previous Data” and “2nd Previous Data” (see Fig. 1). There is one register stack for each dot. 4 different control signals are used to determine the “Driver Out” = “On” duration (heating energy) for each dot, “Strobe”, “Hist 1”, “Hist 2” and “Hist 3”, the timing of all 4 signals is user defined (tSTROBE , tHIST1,tHIST2 and tHIST3). “Hist 3” and “Strobe” Like with conventional TPH driving methods, “Strobe” simultaneously releases all outputs of (at least) one driver-IC. The “Hist 3” signal of the internal TDHC, however, overwrites “Strobe” on each individual driver output position. Whenever the polarity of “Hist 3” is “high” for one output, the respective dot is “Off”, or vice versa, whenever the polarity of “Hist 3” is “low”, all respective “1”-addressed outputs are “On” while “Strobe” is “high”. That means, when the internal TDHC is used, the “high” signal-duration of “Strobe” is the “time-window” for the “Power Out” activity determined by the “Hist 1, Hist 2 and Hist 3” signals. As the “Hist 3”-input is internally pulled “low” when the respective input terminal is not connected (see connector-pin assignment), TDHC is then inactive and conventional methods are required to provide external dot-energy control. Intelligent settings of “Strobe”, “Hist 1”, “Hist 2” and “Hist 3” allows numerous timing and sequencing variants of dot heating duration to manage the dot energy requirements in most applications. Please see the History Control Chart for detailed examples. Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 12 of 13 Product Specification Mitani Micronics Co. Ltd. Basic concept of TDHC-timing: 0 1 1 1 1 * (0 or 1) * (0 or 1) 0 0 1 * (0 or 1) * (0 or 1) 0 1 * (0 or 1) Now Data 1st Previous Data 2nd Previous Data Strobe t STROBE Hist 1 don’t' care Hist 2 don’t care t HIST1 t HIST2 t HIST3 Hist 3 Driver Out Off On Off On Off On Off On Off Thermal Dot History Control Chart Now Data 1st Previous Data 2nd Previous Data 0 1 1 1 1 * (0 or 1) * (0 or 1) 0 0 1 * (0 or 1) * (0 or 1) 0 1 * (0 or 1) t STROBE Strobe Hist 1 Variation Example 1 Hist 2 Hist 3 Driver Out Off On Off On Off Off On Off On Off Off On Off On Off On On Off Off Hist 1 Variation Example 2 Hist 2 Hist 3 Driver Out On Off On Off Hist 1 Variation Example 3 Hist 2 Hist 3 Driver Out On Off On Off Hist 1 Variation Example 4 (complex) Hist 2 Hist 3 Driver Out Hist 1 Variation Example 5 (complex) Hist 2 Hist 3 Driver Out Thermal Print Head MO-S2-8-5A2 (2nd edition / 20081125) Page 13 of 13