TB6612FNG驱动模块使用说明

TB6612FNG模块使用说明

慧净电子

简单说明

?电机电源接口带有反接保护电路.相对于传统的L298N效率上提高很多,体积上也大副减少,当然也就显得更加娇贵,所以我们建议有一定动手能力的朋友使用,接线的时候务必细心细心再细心,本模块全部测试OK才会售出,所以不接受任何形式的退换货,此点不能接受的朋友请慎拍.希望大家理解.

TB6612的的用法

TB6612的的用法：

TB6612是双驱动，也就是可以驱动两个电机

下面分别是控制两个电机的IO口

STBY口接单片机的IO口清零电机全部停止，置1通过AIN1 AIN2，BIN1，BIN2 来控制正反转

VM 接12V以内电源

VCC 接5V电源

GND 就不多说了啊

驱动1路

PWMA 接单片机的PWM口

模块原理图

控制逻辑表

1 TB6612FNG简介

? TB6612FNG是东芝半导体公司生产的一款直流电机驱动器件，它具有大电流MOSFET-H桥结构，双通道电路输出，可同时驱动2个电机。

? TB6612FNG每通道输出最高1 A的连续驱动电流，启动峰值电流达2A／3A(连续脉冲／单脉冲)；4种电机控制模式：正转／反转／制动／停止；PWM支持频率高达100 kHz；待机状态；片内低压检测电路与热停机保护电路；工作温度：-20～85℃；SSOP24小型贴片封装。

.

如上图所示，TB6612FNG的主要引脚功能：AINl／AIN2、BIN1／BIN2、PWMA／PWMB为控制信号输入端；AO1／A02、B01／B02为2路电机控制输出端；STBY为正常工作／待机状态控制引脚；VM(3～13.5 V)和VCC(2．7～5．5 V)分别为电机驱动电压输入和逻辑电平输入端。

TB6612FNG是基于MOSFET的H桥集成电路，效率远高于晶体管H桥驱动器。相比L293D每通道平均600 mA的驱动电流和1．2 A的脉冲峰值电流，它的输出负载能力提高了一倍。相比L298N的热耗性和外围二极管续流电路，它无需外加散热片，外围电路简单，只需外接电源滤波电容

就可以直接驱动电机，利于减小系统尺寸。对于PWM信号，高达100 kHz的频率相比以上2款芯片的5 kHz和40 kHz也具有非常大的优势.

Overview

?The TB6612FNG (308k pdf) is a great dual motor driver that is perfect for interfacing two small DC motors such as our micro metal gearmotors to a microcontroller, and it can also be used to control a single bipolar stepper motor. The MOSFET-based H-bridges are much more efficient than the BJT-based H-bridges used in older drivers such as the L298N and Sanyo’s LB1836M, which allows more current to be delivered to the motors and less to be drawn from the logic supply (the LB1836 still has the TB6612 beat for really low-voltage applications). Our little breakout board gives you direct access to all of the features of the TB6612FNG and adds power supply

capacitors and reverse battery protection on the motor supply (note: there is no

reverse protection on the Vcc connection).

?In a typical application, power connections are made on one side of the board and control connections are made on the other. All of the control inputs are internally pulled low. Each of the two motor channels has two direction control pins and a

speed control pin that accepts a PWM input with a frequency of up to 100 kHz.

TheSTBYpin must be driven high to take the driver out of standby mode.

TB6612 Specifications ?Recommended motor voltage (VMOT): 4.5 – 13.5 V

?Logic voltage (VCC): 2.7 – 5.5 V

?Output current maximum: 3 A per channel

?Output current continuous: 1 A per channel (can be paralleled to deliver 2 A continuous)

?Maximum PWM frequency: 100 kHz

?Built-in thermal shutdown circuit

?Filtering capacitors on both supply lines

?Reverse-power protection on the motor supply

Real-world power dissipation

considerations

?The TB6612 motor driver used on the carrier board has a peak current rating of 3 A per channel. The peak ratings are for quick transients (e.g. when a motor is first turned on), and the continuous rating of 1 A is dependent on various conditions, such as the ambient temperature. The actual current you can deliver will depend on how well you can keep the motor driver cool. The carrier’s printed circuit board is designed to draw heat out of the motor driver chip, but performance can be improved by adding a heat sink.