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| DRV8837 直流马达驱动解决方案 |
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| 文章来源： 更新时间：2014/9/16 9:43:00 |
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TI公司的DRV883x是H桥马达驱动器系列产品,能驱动DC马达或其它负载,输出部分包括N沟功率MOSFET,驱动电流最大为1.8A, PWM或PH/EN接口,内置的保护包括过流保护,短路保护,欠压锁住和超温保护.主要用在IP网络监视照相机,气表,低压马达控制和水表.本文介绍了DRV8837主要特性,功能框图, DRV883评估模块(EVM)主要特性,电路图和材料清单.
The DRV883x provides an integrated motor driver solution for cameras, consumer products, toys, and other low-voltage or battery-powered motion control applications. The device can drive one DC motor or other devices like solenoids. The output driver block consists of N-channel power MOSFET’s configured as an H-bridge to drive the motor winding. An internal charge pump generates needed gate drive voltages.
The DRV883x can supply up to 1.8 A of output current. It operates on a motor power supply voltage from 0 to 11 V, and a device power supply voltage of 1.8 V to 7.0 V.
The DRV8837 has a PWM (IN/IN) input interface; the DRV8837 has a PH/EN input interface. Both interfaces are compatible with industry-standard devices.
Internal shutdown functions are provided for overcurrent protection, short circuit protection, undervoltage lockout, and overtemperature.
DRV8837主要特性:
H-Bridge Motor Driver
Drives a DC Motor or Other Loads
Low MOSFET On-resistance: HS + LS 280 mΩ
1.8-A Maximum Drive Current
Separate Motor and Logic Supply Pins:
Motor VM: 0 to 11 V
Logic VCC: 1.8 to 7 V
PWM or PH/EN Interface
DRV8837: PWM, IN1/IN2
DRV8838: PH/EN
Low-power Sleep Mode With 120-nA Maximum Sleep
Current
nSLEEP pin
Small Package and Footprint
8 WSON (PowerPAD)
2.0 × 2.0 mm
Protection Features
VCC Undervoltage Lockout (UVLO)
Overcurrent Protection (OCP)
Thermal Shutdown (TSD)
DRV8837应用:
Camera: Surveillance IP Network
Gas Meter
Motor Control: Low-Voltage
Water Meter
图1. DRV8837功能框图
图2. DRV8838功能框图
DRV883评估模块(EVM)
The DRV8837 evaluation module (EVM) demonstrates the capabilities and performance of the DRV8837 motor driver from Texas Instruments. User can control the DRV8837 with the onboard MS430 microcontroller or with an external microcontroller.
DRV883评估模块(EVM)主要特性:
1.8A peak/1.8A continuous output
Wide operating voltage: 1.8 to 11V
Split Vm/Vcc supply isolates motor voltage from logic supply
Evaluate driver performance with on-board MSP430 MCU or external MCU
On-board speed and direction controls; Micro-USB connection for easy evaluation/power up
5V brushed DC motor included
图3. DRV883评估模块(EVM)外形图
图4. DRV883评估模块(EVM)电路图
DRV883评估模块(EVM)材料清单:
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