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| Motor driver ICs Stepping motor driver BA6343 The BA6343 is a driver designed to drive the stepping motors used in printers and fax machines. FApplications Printers and facsimiles FFeatures 1) Micro-step drive compatible. 2) Overheating protection circuit on chip. FAbsolute maximum ratings (Ta = 25_C) 3) Wide operating voltage range (7V to 33V). FRecommended operating conditions (Ta = 25_C) 813 Motor driver ICs FBlock diagram BA6343 814 Motor driver ICs FPin descriptions BA6343 815 Motor driver ICs FInput / output circuits (1) Logic and analog inputs BA6343 (2) H-bridge output 816 Motor driver ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VM = 13V, and VCC = 5V) (1) DC characteristics BA6343 (2) AC characteristics (channels A, AB, B, BB, and RL = 100) FCircuit operation Input / output truth table 817 Motor driver ICs FApplication example BA6343 818 Motor driver ICs FOperation notes (1) Power supply voltages 1 and 2 (VM and VCC) The rise and fall order for the power supply voltages 1 and 2 (VM and VCC5) is as follows. Rise: power supply voltage 1 (VM) on ! power supply voltage 2 (VCC5) on Fall: power supply voltage 2 (VCC5) off ! power supply voltage 1 (VM) off (2) Logic and analog input pins Due to the circuit construction, when the logic and analog input pins are open, it is equivalent to a high-level input. (3) Thermal shutdown (TSD) FElectrical characteristics curve BA6343 At Tj = 150_C (min.), all logic input voltages go low (channels A, AB, B and BB). Therefore, the outputs (OUTA, AB, B and BB) all go high impedance. The TSD has approximately 35_C of hysteresis. (4) VCC5 pin When VCC5 is open, it is internally pulled down to ground via a resistor (20k (Typ.)). (5) Heat sink Be certain to connect the heatsink to GND. FExternal dimensions (Units: mm) 819 |
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