### ETC BA6343

```Motor driver ICs
Stepping motor driver
BA6343
The BA6343 is a driver designed to drive the stepping motors used in printers and fax machines.
Applications
Printers and facsimiles
Features
1) Micro-step drive compatible.
2) Overheating protection circuit on chip.
3) Wide operating voltage range (7V to 33V).
Absolute maximum ratings (Ta = 25C)
Recommended operating conditions (Ta = 25C)
813
Motor driver ICs
Block diagram
814
BA6343
Motor driver ICs
BA6343
Pin descriptions
815
Motor driver ICs
Input / output circuits
(1) Logic and analog inputs
(2)
816
H-bridge output
BA6343
Motor driver ICs
BA6343
Electrical characteristics (unless otherwise noted, Ta = 25C, VM = 13V, and VCC = 5V)
(1) DC characteristics
(2)
AC characteristics (channels A, AB, B, BB, and RL = 100Ω)
Circuit operation
Input / output truth table
817
Motor driver ICs
Application example
818
BA6343
Motor driver ICs
Operation 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)
BA6343
At Tj = 150C (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 35C of hysteresis.
(4) VCC5 pin
When VCC5 is open, it is internally pulled down to ground
via a resistor (20kΩ (Typ.)).
(5) Heat sink
Be certain to connect the heatsink to GND.
Electrical characteristics curve
External dimensions (Units: mm)
819
```