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| DRV8837 直流馬達驅(qū)動解決方案 |
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| 文章來源： 更新時間：2014/9/16 9:43:00 |
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TI公司的DRV883x是H橋馬達驅(qū)動器系列產(chǎn)品,能驅(qū)動DC馬達或其它負載,輸出部分包括N溝功率MOSFET,驅(qū)動電流最大為1.8A, PWM或PH/EN接口,內(nèi)置的保護包括過流保護,短路保護,欠壓鎖住和超溫保護.主要用在IP網(wǎng)絡(luò)監(jiān)視照相機,氣表,低壓馬達控制和水表.本文介紹了DRV8837主要特性,功能框圖, DRV883評估模塊(EVM)主要特性,電路圖和材料清單.
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應用:
Camera: Surveillance IP Network
Gas Meter
Motor Control: Low-Voltage
Water Meter
圖1. DRV8837功能框圖
圖2. DRV8838功能框圖
DRV883評估模塊(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評估模塊(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
圖3. DRV883評估模塊(EVM)外形圖
圖4. DRV883評估模塊(EVM)電路圖
DRV883評估模塊(EVM)材料清單:
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