THB6016

THB6016H

PWM Chopper-Type bipolar Stepping Motor Driver IC

The THB6016H is a PWM chopper-type sinusoidal micro-step THB6016H ipolar stepping motor driver IC.

It supports both 2-phase/1-2-phase/2W1-2-phase /4W1-2-phase xcitation mode and forward/reverse mode and is capable of ow-vibration, high-performance drive of 2-phase bipolar type tepping motors using only a clock signal.

Features

Single-chip bipolar sinusoidal micro-step stepping motor driver Uses high withstand voltage BiCD process: Ron (upper + lower) = 0.60 (typ.)

Forward and reverse rotation control available Selectable phase drive (2, 1-2, W1-2, and 2W1-2) High output withstand voltage: VCEO = 40 V High output current: IOUT = HQ: 3.5 A (peak) Packages: HZIP25-P-1.27

Built-in input pull-down resistor: 100k (typ.)

Output monitor pin equipped: MO current (IMO (max) = 1 mA) Equipped with reset and enable pins Built-in overheat protection circuit

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HHBY THB6016H Block Diagram

THB6016H

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HHBY THB6016H Pin Functions

H: No NC

F: Other than the above pins, all are NC

Pull-down resistor 100 k (typ.): [all control input pins]

Note:1--- - If the F pin number column indicates more than one pin, the indicated pins should be tied to each other at a position as close to the pins as possible.

(The electrical characteristics of the relevant pins in this document refer to those when they are handled in that way.)

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HHBY THB6016H Description of Functions

1. Excitation Settings

You can use the M1 and M2 pin settings to configure four different excitation settings. (The default is 2-phase excitation using the internal pull-down.)

2. Function

You can change the output to OFF and Initial mode by using the ENABLE and RESET pins respectively.

In Initial mode, the CLK and CW/CCW settings don’t matter.

X: Don’t care 3. Initial Mode

When RESET is used, the phase currents are as follows. In this instance, the MO pin is L (connected to open drain).

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4. Current Decay Settings

Output is generated by four PWM blasts; 25% decay is created by inducing decay during the last blast in Fast mode; 50% decay is created by inducing decay during the last two blasts in Fast mode; and 100% decay is created by inducing all four blasts in Fast mode.

If there is no input with the pull-down resistor connection then the setting is Normal.

5. Torque Settings (Current Value)

The current ratio used in actual operations is determined in regard to the current setting due to

resistance. Configure this for extremely low torque scenarios such as when Weak Excitation mode is stopped.

If there is no input with the pull-down resistor connection then the setting is 100% torque.

6. Protect and MO (Output Pins)

You can configure settings from the receiving side by using an open drain connection for the output pins and making the pull-up voltage variable.

When a given pin is in its designated state it will go ON and output at Low level.

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HHBY THB6016H 7. OSC

Output chopping waves are generated by connecting the condenser and having the CR oscillate. The values are as shown below (roughly: ± 30% margin of error).

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1. How to Turn on the Power

Turn on VDD. When the voltage has stabilized, turn on VMA/B.

In addition, set the Control Input pins to Low when inputting the power. (All the Control Input pins are pulled down internally.)

Once the power is on, the CLK signal is received and excitation advances when RESET goes high and excitation is output when ENABLE goes high. If only RESET goes high, excitation won't be output and only the internal counter will advance. Likewise, if only ENABLE goes high, excitation won't advance even if the CLK signal is input and it will remain in the initial state. The following is an example:

2. Calculating the Setting Current

To perform constant-current operations, it is necessary to configure the base current using an external resistor. If the voltage on the NFA (B) pin is 0.5 V (with a torque of 100%) or greater, it will not charge. Ex.: If the maximum current value is 1 A, the external resistance will be 0.5 W. 3. PWM Oscillator Frequency (External Condenser Setting)

An external condenser connected to the OSC pin is used to internally generate a saw tooth waveform. PWM is controlled using this frequency. Toshiba recommends 100 to 3300 pF for the capacitance, taking variations between ICs into consideration.

Approximation:fosc=1/(Cosc*1.5*(10/Cosc+1)/66)*1000kHz

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4. Power Dissipation

The IC power dissipation is determined by the following equation : P=VDD*IOUT*Ron*2drivers

The higher the ambient temperature, the smaller the power dissipation.

Check the PD-Ta curve, and be sure to design the heat dissipation with a sufficient margin.

5. Heat Sink Fin Processing

The IC fin (rear) is electrically connected to the rear of the chip. If current flows to the fin, the IC will

malfunction. If there is any possibility of a voltage being generated between the IC GND and the fin, either ground the fin or insulate it.

6. Thermal Protection

When the temperature reaches 170ºC(as standard value),the thermal protection circuit is activated Swithing the output to off. There is a variation of plus or minus about 20 C in the temperature that Triggers the circuit operation.

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