tb62218fng TOSHIBA Semiconductor CORPORATION, tb62218fng Datasheet
tb62218fng
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tb62218fng Summary of contents
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... TOSHIBA BiCD Integrated Circuit Silicon Monolithic BiCD Constant-Current Two-Phase Bipolar Stepping Motor Driver IC The TB62218FNG is a two-phase bipolar stepping motor driver using a PWM chopper. Fabricated with the BiCD process, the TB62218FNG is rated at 40 V/2.0 A. The on-chip voltage regulator allows control of a stepping motor with a single V power supply ...
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... TB62218FNG TB62218FNG VREF_A VREF_B GND VCC RS_B1 RS_B2 NC OUT_B1 OUT_B2 NC NC GND NC OUT OUT GND 2010-10-07 ...
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... R S STANDBY Note: All the grounding wires of the TB62218FNG must run on the solder mask on the PCB and be externally terminated at only one point. Also, a grounding method should be considered for efficient heat dissipation. Careful attention should be paid to the layout of the output, V across output pins or to the power supply or ground. If such a short-circuit occurs, the TB62218FNG may be permanently damaged ...
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... Vref_A 39 8kΩ 3kΩ 3kΩ 1kΩ TB62218FNG Function Motor power ground B-phase negative driver output NC No-connect Motor power ground NC No-connect No-connect B-phase positive driver output NC No-connect Power supply pin of B-phase motor coil and the sink current sensing of B-phase motor coil ...
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... Thermal shutdown (TSD) The thermal shutdown circuit turns off all the outputs when the junction temperature (T (typ.). The outputs retain the current states. The TB62218FNG exits TSD mode and resume normal operation when the TB62218FNG is rebooted or the STAND BY pin is changed from High to Low and then to High. ...
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... The value of even one parameter of the absolute maximum ratings should not be exceeded under any circumstances. The TB62218FNG does not have overvoltage protection. Therefore, the device is damaged if a voltage exceeding its rated maximum is applied. All voltage ratings including supply voltages must always be followed. The other notes and considerations described later should also be referred to. ( 85° ...
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... 2 25° (D-S) OUT j voltage that causes the outputs (OUT_A1, OUT_A2, OUT_B1and OUT_B2 IN and V is defined as the input hysteresis → → TB62218FNG Min Typ. Max (Note) 100 200 300 35 50 ⎯ ⎯ = Low ⎯ High ⎯ ...
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... If the power supply does not have enough sink capability, the power supply and output pins of the device might rise above the rated voltages. The magnitude of the motor back-EMF varies with usage conditions and motor characteristics. It must be fully verified that there is no risk that the TB62218FNG or other components will be damaged or fail due to the motor back-EMF. ...
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... After ISD threshold is exceeded due output short-circuit to power or ground After ISD threshold is exceeded due to tlSD AC an output short-circuit to power or ground 90% t phase 90% 50% 10 TB62218FNG Min Typ. Max ⎯ ⎯ 400 ⎯ ⎯ 100 ⎯ ⎯ 50 ⎯ ⎯ 50 150 200 ...
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... Slow-Decay mode for the remainder of the period. Internal CR CLK I OUT Predefined current level NF 37.5% Mixed-decay Timing charts may be simplified for explanatory purposes. f chop MDT Predefined current level MDT (mixed decay timing) Point: 37.5% (6/16) Fixed 10 TB62218FNG f chop MDT NF 2010-10-07 ...
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... RS comparator detects the predefined current level (NF result, the IC enters Slow-Decay mode. The TB62218FNG transits from Slow-Decay mode to Fast-Decay mode at the point 37. PWM frequency (one chopping frequency) remains in a whole PWM frequency period (on the rising edge of the 11th clock of the OSCM clock). When the OSCM pin clock counter clocks 16 times, the Fast-Decay mode ends ...
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... The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes. Calculation of the Predefined Output Current For PWM constant-current control, the TB62218FNG uses a clock generated by the CR oscillator. The peak output current can be set via the current-sensing resistor ( ÷ ...
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... IC Power Consumption The power consumed by the TB62218FNG is approximately the sum of the following two: 1) the power consumed by the output transistors, and 2) the power consumed by the digital logic and pre-drivers. • The power consumed by the output transistors is calculated, using the R • Whether in Charge, Fast Decay or Slow Decay mode, two of the four transistors comprising each H-bridge contribute to its power consumption at a given time ...
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... CR = 1600 kHz delay occurs between the OSC waveform and internal CR CLK waveform. OSC charge delay Internal CR CLK H OSC (CR Output voltage OUT_A L H Output voltage OUT Predefined current level Output current L Charge Timing charts may be simplified for explanatory purposes. OSC fast delay t chop 50% 50% Slow 14 TB62218FNG 50% Fast 2010-10-07 ...
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... IN_B1 L H IN_B2 L A Input PHASE 100 150 TB62218FNG A PHASE B PHASE Output Input IN A2 IOUT(A) PHASE 100 -100 -100 100 2010-10-07 ...
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... 100 150 TB62218FNG BPHASE Output Input IN A2 IOUT(A) PHASE 100 -100 -100 -100 100% ...
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... 100 150 TB62218FNG A PHASE B PHASE Input Output Input IOUT(A) PHASE 71 38 -38 -71% H ...
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... Therefore, a protection fuse must always be added to the V optimal fuse capacitance varies with usage conditions, and one that does not adversely affect the motor operation or exceed the power dissipation rating of the TB62218FNG should be selected. Calculating OSCM Oscillating Frequency The OSCM oscillating frequency can be approximated using the following equation: ...
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... When mounted on a special glass-epoxy four-layer board for HTSSOP48-P-300-0.50 (Cu thickness: 55μm for top layer and bottom layer, 35μm for middle layers, Size: 100 mm ×110 mm × 1.6 mm, θ(j-a) = 30[°C/W]: typ.) 4.0 3.0 2.0 1 100 125 75 85 Ambient temperature Ta [°C] 19 TB62218FNG 150 175 2010-10-07 ...
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... Careful attention should be paid to the layout of the output, V the power supply or ground. If such a short-circuit occurs, the TB62218FNG may be permanently damaged. Also, if the device is installed in a wrong orientation, a high voltage might be applied to components with lower voltage ratings, causing them to be damaged. The TB62218FNG does not have an overvoltage protection circuit. Thus voltage exceeding the rated maximum voltage is applied, the TB62218FNG will be damaged ...
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... Package Dimensions HTSSOP48-P-300-0.50 21 TB62218FNG Unit: mm 2010-10-07 ...
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... DC voltage will increase. If this output voltage is connected to a speaker with low input withstand voltage, overcurrent or IC failure can cause smoke or ignition. (The over current can cause smoke or ignition from the IC itself.) In particular, please pay attention when using a Bridge Tied Load (BTL) connection type IC that inputs output DC voltage to a speaker directly. 22 TB62218FNG 2010-10-07 ...
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... If the current sink capability of the power supply is small, the device’s motor power supply and output pins might be exposed to conditions beyond maximum ratings. To avoid this problem, take the effect of back-EMF into consideration in your system design. 23 TB62218FNG 2010-10-07 ...
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... Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product. Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. TOSHIBA assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations. 24 TB62218FNG 2010-10-07 ...