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DRV8871_16 Datasheet(数据表) 7 Page - Texas Instruments

部件型号  DRV8871
说明  Brushed DC Motor Driver With Internal Current Sense (PWM Control)
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
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DRV8871 Datasheet(HTML) 7 Page - Texas Instruments

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 7 page
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Power
OUT1
VM
Gate
Driver
OUT2
VM
BDC
VM
0.1 µF
bulk
PGND
GND
PPAD
IN1
IN2
Core
Logic
Charge
Pump
VM
VCP
OCP
OCP
VCP
Gate
Driver
VCP
Protection Features
Temperature
Sensor
Overcurrent
Monitoring
Voltage
Monitoring
ILIM
RILIM
Internal
Current Sense
7
DRV8871
www.ti.com
SLVSCY9A – AUGUST 2015 – REVISED JANUARY 2016
Product Folder Links: DRV8871
Submit Documentation Feedback
Copyright © 2015–2016, Texas Instruments Incorporated
7 Detailed Description
7.1 Overview
The DRV8871 is an optimized 8-pin device for driving brushed DC motors with 6.5 to 45 V and up to 3.6-A peak
current. The integrated current regulation restricts motor current to a predefined maximum. Two logic inputs
control the H-bridge driver, which consists of four N-channel MOSFETs that have a typical Rds(on) of 565 mΩ
(including one high-side and one low-side FET). A single power input, VM, serves as both device power and the
motor winding bias voltage. The integrated charge pump of the device boosts VM internally and fully enhances
the high-side FETs. Motor speed can be controlled with pulse-width modulation, at frequencies between 0 to 100
kHz. The device has an integrated sleep mode that is entered by bringing both inputs low. An assortment of
protection features prevent the device from being damaged if a system fault occurs.
7.2 Functional Block Diagram




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