tb62214fng TOSHIBA Semiconductor CORPORATION, tb62214fng Datasheet
tb62214fng
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tb62214fng Summary of contents
Page 1
... BiCD Constant-Current Two-Phase Bipolar Stepping Motor Driver IC The TB62214FNG is a two-phase bipolar stepping motor driver using a PWM chopper controlled by clock input. Fabricated with the BiCD process, the TB62214FNG is rated at 40 V/2 The on-chip voltage regulator allows control of a stepping motor with a single V power supply ...
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... TB62214FNG TB62214FNG VREF_A VREF_B GND VCC RS_B1 RS_B2 NC OUT_B1 OUT_B2 NC NC GND NC OUT_B 1 OUT_B 2 GND 2010-10-01 ...
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... R S ENABLE Note: All the grounding wires of the TB62214FNG 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 TB62214FNG may be permanently damaged ...
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... TB62214FNG Function GND Motor power ground OUT_B2 B-phase negative driver output OUT_B1 NC No connect GND Motor power ground NC No connect NC No connect OUT_B2 B-phase positive driver output OUT_B1 NC No connect ...
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... The ENABLE pin controls whether or not to let the current flow through a given phase for a stepper motor drive. This pin serves to select if the motor is stopped in Off mode or activated. The pin must be fixed to Low on the power-on or power-down of the TB62214FNG. During power on, once the VM voltage has reached the voltage required to operate the motor, set this to High. ...
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... The thermal shutdown circuit turns off all the outputs when the junction temperature (T (typ.). The outputs retain the current states. The TB62214FNG exits TSD mode and resume normal operation when the TB62214FNG is rebooted or both the D_MODE_1 and D_MODE_2 pins are switched to Low. ...
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... The value of even one parameter of the absolute maximum ratings should not be exceeded under any circumstances. The TB62214FNG 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 ...
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... 25° (D-S) OUT j voltage that causes the outputs (OUT_A1, OUT_A2, OUT_B1 and OUT_B2 and V is defined as the input hysteresis → → TB62214FNG Min Typ. Max (Note) 100 200 35 50 ⎯ ⎯ ⎯ 2.4 ⎯ ⎯ ⎯ ...
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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 TB62214FNG 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 output short-circuit to power or ISD ground CLK 90% 50 TB62214FNG Min Typ. Max ⎯ ⎯ 100 ⎯ 300 ⎯ 250 150 200 250 100 150 200 ⎯ ...
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... Timing Charts of CLK, Output Current and MO Output Timing charts may be simplified for explanatory purposes. Clock input A phase Two-phase excitation B phase MO output A phase 1-2-phase excitation B phase MO output A phase W1-2 phase excitation B phase MO output f chop MDT Predefined current level MDT (mixed decay timing) Point: 37.5% (6/16) Fixed 11 TB62214FNG f chop MDT NF 2010-10-01 ...
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... RS comparator detects the predefined current level (NF result, the IC enters Slow-Decay mode. The TB62214FNG 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 TB62214FNG uses a clock generated by the CR oscillator. The peak output current can be set via the current-sensing resistor (R ÷ ...
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... IC Power Consumption The power consumed by the TB62214FNG 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) L Output H voltage OUT_A L H Output voltage OUT Predefined current level Output current L Charge OSC fast delay t chop 50% 50% Slow Timing Waveforms of OSC and Internal CR CLK 15 TB62214FNG 50% Fast 2010-10-01 ...
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... CCW − 100 − 150 A Phase 150 CW 100 50 0 − 100 − 100 − 50 − 100 CCW − 150 A Phase 16 TB62214FNG Initialize position MO output: Low 150 Initialize position MO output: Low 150 Initialize position 150 MO output: Low 2010-10-01 ...
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... Therefore, a protection fuse must always be added to the VM power supply as a safety precaution. The 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 TB62214FNG should be selected. Calculating OSCM Oscillating Frequency ...
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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] 18 TB62214FNG 150 175 2010-10-01 ...
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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 TB62214FNG 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 TB62214FNG does not have an overvoltage protection circuit. Thus voltage exceeding the rated maximum voltage is applied, the TB62214FNG will be damaged ...
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... Package Dimensions HTSSOP48-P-300-0.50 20 TB62214FNG Unit: mm 2010-10-01 ...
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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. 21 TB62214FNG 2010-10-01 ...
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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. 22 TB62214FNG 2010-10-01 ...
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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. 23 TB62214FNG 2010-10-01 ...