PT12465A Datasheet | PTC

DESCRIPTION The PT12465A is a stepping motor driver, the Hbridges output current controlled by PWM constantcurrent topology. Built-in micro-step sequencer could generate sinusoidal output current to the stepping motor by a single clock input. The PT12465A support multiple excitation modes such as 2-phase, 1-2-phase, W1-2-phase and 2W1-2 phase mode. The motor rotation revs determinate by the clock frequency applies on CK pin and excitation mode, the CW/CCW pin logic level determinate bipolar stepping motor in forward or reverse direction. APPLICATIONS - Camera lens - Camera peripheral devices - Low power stepping motors - HUD reflector FEATURES - AEC-Q100 Grade 2 qualified, operation temperature range -40°C~105°C - Motor power supply voltage range: - Control (VCC): 2.7V to 5.5V - Motor (VM): 2.5V to 16V - Maximum output current: 0.8 A - H-bridge switches on-resistance: Ron = 1.5Ω (high side + low side, VM=7 V) - Built-in microstep sequencer ticking by CK clock signal - Programmable phase current excitation modes (2 phase, 1-2 phase, W1-2 phase and 2W1-2 phase) - Control input pins with internal pull-down resistors - Motor step monitor output (MO) - Thermal shutdown (TSD) protection - VCC under voltage lock-out (UVLO) function - 20 pins, thin small surface-mount package (TSSOP-20 173mil, 0.65 mm lead pitch) BLOCK DIAGRAM Vcc STBY RESET ENABLE CK CW/CCW M1 M2 MO DCY Bandgap UVLO(2V) STANDBY Control Logic Step Logic Microstep Decoder & Decay mode Output Current Gate Driver H-Bridge A PWM Timer AO1...