TB6560AFG

The TB6560AHQ/AFG ensures high output withstand voltage and current for driving bipolar stepping motors through the use of the BiCD process, which provides a high output withstand voltage. The Ron values for the TB6560AHQ and TB6560AFG are 0.6 Ω and 0.7 Ω respectively, ensuring high performance forward and reverse driving of a two-phase bipolar stepping motor using only a clock signal [1]. Additionally, the TB6560AHQ/AFG features selectable phase excitation modes (2, 1-2, 2W1-2, and 4W1-2) and a high output withstand voltage of VDSS = 40 V [1]. The Absolute Maximum Ratings for the TB6560AHQ/AFG specify the power supply voltage, output current, drain current, input voltage, power dissipation, operating temperature, and storage temperature to ensure safe operation within specified limits [2]. The operating range further defines the power supply voltage, output current, input voltage, and clock frequency for optimal performance within the specified temperature range [3]. The pin functions of the TB6560AHQ/AFG outline the torque setting inputs, clock input for microstepping, enable/disable control, reset function, signal ground, motor power supply pins, and output connections for phase-B driver, ensuring proper functionality and control of the stepping motor driver IC [4]. The block diagram illustrates the internal circuitry of the TB6560AHQ/AFG, including the input circuit, maximum current setting circuit, thermal shutdown circuit, protect circuit, bridge drivers, PWM control circuit, and output connections, all contributing to the high output withstand voltage and current capabilities of the IC for driving bipolar stepping motors [5]. [2, 3, 4, 5].

The purpose of the TB6560AHQ/AFG PWM chopper-type stepping motor driver IC is to provide sinusoidal-input microstep control for bipolar stepping motors in applications requiring various excitation modes such as 2-phase, 1-2 phase, 2W1-2 phase, and 4W1-2 phase. It is designed for low-vibration, high-performance forward and reverse driving of a two-phase bipolar stepping motor using only a clock signal. [1]

The TB6560AHQ/AFG supports four different excitation modes, which can be selected using the M1 and M2 inputs. These modes are: 1. 2-phase excitation mode (M1: L, M2: L) [1] 2. 1-2-phase excitation mode (M1: H, M2: L) [1] 3. 4W1-2-phase excitation mode (M1: L, M2: H) [1] 4. 2W1-2-phase excitation mode (M1: H, M2: H) [1] Each excitation mode has specific phase currents for A-phase and B-phase, as well as corresponding output transistor operating modes. Additionally, there is an initial mode when the RESET pin is low, where the states of the CLK and CW/CCW pins are don't-cares. [1] Therefore, the different excitation modes supported by the TB6560AHQ/AFG are 2-phase, 1-2-phase, 4W1-2-phase, and 2W1-2-phase. [1]