BIDIR-115D datasheet, PDF - EEWORLD Datasheet

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BIDIR-115D: Description15 Amp Bidirectional Digital PWM Motor Speed Controller; File Size64KB，6 Pages; ManufacturerETC

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BIDIR-115D Overview

15 Amp Bidirectional Digital PWM Motor Speed Controller

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BIDIR-115D(S) Speed Controller

15 Amp Bidirectional Digital PWM Motor Speed Controller

BIDIR-115D and BIDIR-115DS

The BIDIR-115D(S) allows you to control the speed and direction of a motor using an analog

voltage input, push buttons, or digital logic pulses. Use of PWM and low on-resistance MOSFETs

allows for high efficiency control with minimal loss of power.

Absolute Maximum Ratings:

Parameter

Max

Units

Continuous Output Current

Instantaneous Output Current

Input Voltage

Warning – operating at or above the absolute maximum ratings may damage your controller or

your equipment under control.

Operating Parameters:

Parameter

Input Voltage

Continuous Output Current

Digital Logic Input Low Level

Digital Logic Input High Level

Digital Input Capacitance

Analog Voltage Input

Potentiometer Total Resistance

Digital Continuous Mode Change Rate

Soft Start from Disabled Mode, Ramp Rate

PWM Frequency

Quiescent Current Drain

Temperature

Min

3.5

150

-40

Typical

0.1

100

200

Max

1.5

250

+60

Units

kΩ

%/s

°C

Pin-out:

Pin Label

P-

DN/CN

P+

DIR

M-

M+

GND

V+

Function

Lower pin of potentiometer (GND)

Wiper of potentiometer (analog)

Decrease Pulse Width (digital)

(internal pull-up in digital mode)

Upper pin of potentiometer (5V)

Increase Pulse Width

(internal pull-up)

Direction

PWM output enable

(internal pull-up)

Negative output to LOAD

Positive output to LOAD

Ground from power supply

Positive Power Supply

Active H/L

L = decrease (digital)

L = increase

L = forward

H = reverse

H = enable

L = disable

Mode

Analog

Both

Digital

Both

BIDIR-115D(S) Speed Controller

Digital Mode:

There are two ways to operate in digital mode: Clocked Mode and Continuous Mode.

Clocked Mode:

In clocked mode, the UP and DN inputs are used to control the duty cycle. For every

rising edge of the UP [DN] line, the output pulse width is increased [decreased] by

approximately 0.8%. Once the pulse width reaches 0%, any further inputs on the DN

line have no effect. Similarly, when the pulse width reaches 100%, any further inputs on

the UP line have no effect.

Continuous Mode:

In continuous mode, the UP and DN inputs are designed for interfacing to push buttons.

When the UP line is brought LOW, the duty cycle is continuously increased at a rate of ~

33% per second. Similarly, when the DN line is brought low, the duty cycle is decreased

at a rate of ~ 33% per second. Any additional increase [decrease] after the pulse width

has reached 100% [0%] will have no effect on the output.

Automatic digital de-bouncing of the inputs is implemented in continuous mode. Spurious

inputs are ignored.

Output Enable:

The output is enabled by default and is internally pulled up. Bringing this pin low immediately

brings the PWM output to 0%. Allowing the pin to go back to high re-enables the PWM output at

the previous duty cycle.

When in digital mode, the duty cycle may be changed by the UP and DN pins at all times, even in

PWM output disabled mode. Thus, it is possible to turn off the output, change the duty cycle, and

turn on the output again, but at the new duty cycle.

Reversing:

A 0-5V digital signal can be sent to the DIR input to reverse the direction of the motor. If using

continuous mode, a switch can be connected between P+ and DIR instead for reversing control.

Ensure that the motor is completely stopped before reversing direction. The onboard fuse

protects the motor in the event of an accidental reverse when the motor is still rotating. Replace

only with a fuse of the same type and rating.

Soft Start (BIDIR-115DS only):

The output is automatically ramped up back to the full PWM level at a rate of 100% per second.

This reduces the stress placed on power supplies and mechanical linkages as motors come back

up to speed.

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