Motor Driver. DRV8871 Datasheet

DRV8871 Driver. Datasheet pdf. Equivalent

Part DRV8871
Description Brushed DC Motor Driver
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DRV8871
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DRV8871
SLVSCY9B – AUGUST 2015 – REVISED JULY 2016
DRV8871 3.6-A Brushed DC Motor Driver With Internal Current Sense (PWM Control)
1 Features
1 H-Bridge Motor Driver
– Drives One DC Motor, One Winding of a
Stepper Motor, or Other Loads
• Wide 6.5-V to 45-V Operating Voltage
• 565-mΩ Typical RDS(on) (HS + LS)
• 3.6-A Peak Current Drive
• PWM Control Interface
• Current Regulation Without a Sense Resistor
• Low-Power Sleep Mode
• Small Package and Footprint
– 8-Pin HSOP With PowerPAD™
– 4.9 × 6 mm
Integrated Protection Features
– VM Undervoltage Lockout (UVLO)
– Overcurrent Protection (OCP)
– Thermal Shutdown (TSD)
– Automatic Fault Recovery
2 Applications
• Printers
• Appliances
• Industrial Equipment
• Other Mechatronic Applications
3 Description
The DRV8871 device is a brushed-DC motor driver
for printers, appliances, industrial equipment, and
other small machines. Two logic inputs control the H-
bridge driver, which consists of four N-channel
MOSFETs that can control motors bidirectionally with
up to 3.6-A peak current. The inputs can be pulse-
width modulated (PWM) to control motor speed, using
a choice of current-decay modes. Setting both inputs
low enters a low-power sleep mode.
The DRV8871 device has advanced current-
regulation circuitry that does not use an analog
voltage reference or external sense resistor. This
novel solution uses a standard low-cost, low-power
resistor to set the current threshold. The ability to limit
current to a known level can significantly reduce the
system power requirements and bulk capacitance
needed to maintain stable voltage, especially for
motor startup and stall conditions.
The device is fully protected from faults and short
circuits, including undervoltage (UVLO), overcurrent
(OCP), and overtemperature (TSD). When the fault
condition is removed, the device automatically
resumes normal operation.
Device Information (1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8871
HSOP (8)
4.90 mm × 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
6.5 to 45 V
Peak Current Regulation
Controller
IN1
IN2
ILIM
DRV8871
Brushed DC
Motor Driver
Current
Sense and
Regulation
Fault
Protection
3.6 A
BDC
Copyright © 2017, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



DRV8871
DRV8871
SLVSCY9B – AUGUST 2015 – REVISED JULY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3
6.2 ESD Ratings.............................................................. 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 7
7.1 Overview ................................................................... 7
7.2 Functional Block Diagram ......................................... 7
7.3 Feature Description................................................... 8
7.4 Device Functional Modes........................................ 10
8 Application and Implementation ........................ 11
8.1 Application Information............................................ 11
8.2 Typical Application ................................................. 11
9 Power Supply Recommendations...................... 14
9.1 Bulk Capacitance .................................................... 14
10 Layout................................................................... 15
10.1 Layout Guidelines ................................................. 15
10.2 Layout Example .................................................... 15
10.3 Thermal Considerations ........................................ 15
10.4 Power Dissipation ................................................. 15
11 Device and Documentation Support ................. 17
11.1 Documentation Support ........................................ 17
11.2 Receiving Notification of Documentation Updates 17
11.3 Community Resources.......................................... 17
11.4 Trademarks ........................................................... 17
11.5 Electrostatic Discharge Caution ............................ 17
11.6 Glossary ................................................................ 17
12 Mechanical, Packaging, and Orderable
Information ........................................................... 17
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (January 2016) to Revision B
Page
• Deleted the power supply voltage ramp rate (VM) parameter from the Absolute Maximum Ratings table .......................... 3
• Added the output current parameter to the Absolute Maximum Ratings table ...................................................................... 3
• Added the Receiving Notification of Documentation Updates section ................................................................................ 17
Changes from Original (August 2015) to Revision A
Page
• Updated the ƒPWM max value and added a note .................................................................................................................... 4
• Removed the redundant TA condition and added ƒPWM = 24 kHz .......................................................................................... 5
• Added more information to clarify how the max RMS current varies for different applications ........................................... 12
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