DRV8848 Driver Datasheet

DRV8848 Datasheet PDF, Equivalent


Part Number

DRV8848

Description

Dual H-Bridge Motor Driver

Manufacture

etcTI

Total Page 28 Pages
Datasheet
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DRV8848
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DRV8848
SLLSEL7A – OCTOBER 2014 – REVISED NOVEMBER 2015
DRV8848 Dual H-Bridge Motor Driver
1 Features
1 Dual H-Bridge Motor Driver
– Single/Dual Brushed DC
– Stepper
• PWM Control Interface
• Optional Current Regulation With 20-μs Fixed Off-
Time
• High Output Current per H-Bridge
– 2-A Maximum Driver Current at 12 V and
TA = 25°C
– Parallel Mode Available Capable of 4-A
Maximum Driver Current at 12 V and
TA = 25°C
• 4- to 18-V Operating Supply Voltage Range
• Low-Current 3-µA Sleep Mode
• Thermally-Enhanced Surface Mount Package
• Protection Features
– VM Undervoltage Lockout (UVLO)
– Overcurrent Protection (OCP)
– Thermal Shutdown (TSD)
– Fault Condition Indication Pin (nFAULT)
2 Applications
• Appliances
• General Brushed and Stepper Motors
• Printers
3 Description
The DRV8848 provides a dual H-bridge motor driver
for home appliances and other mechatronic
applications. The device can be used to drive one or
two DC motors, a bipolar stepper motor, or other
loads. A simple PWM interface allows easy
interfacing to controller circuits.
The output block of each H-bridge driver consists of
N-channel and P-channel power MOSFETs
configured as full H-bridges to drive the motor
windings. Each H-bridge includes circuitry to regulate
the winding current using a fixed off-time chopping
scheme. The DRV8848 is capable of driving up to 2
A of current from each output or 4 A of current in
parallel mode (with proper heat sinking, at 12 V and
TA = 25°C).
A low-power sleep mode is provided, which shuts
down internal circuitry to achieve very-low quiescent
current draw. This sleep mode can be set using a
dedicated nSLEEP pin.
Internal protection functions are provided for UVLO,
OCP, short-circuit protection, and overtemperature.
Fault conditions are indicated by a nFAULT pin.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8848
HTSSOP (16)
5.00 mm × 6.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
4 to 18 V
PWM
PWM
VREF
nFAULT
DRV8848
Dual
H-Bridge
Motor
Driver
1A
DC
M
1A
DC
M
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.

DRV8848
DRV8848
SLLSEL7A – OCTOBER 2014 – REVISED NOVEMBER 2015
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......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Timing Requirements ................................................ 6
6.7 Typical Characteristics .............................................. 7
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 14
8 Application and Implementation ........................ 15
8.1 Application Information............................................ 15
8.2 Typical Application ................................................. 15
9 Power Supply Recommendations...................... 17
9.1 Bulk Capacitance Sizing ......................................... 17
10 Layout................................................................... 18
10.1 Layout Guidelines ................................................. 18
10.2 Layout Example .................................................... 18
11 Device and Documentation Support ................. 19
11.1 Community Resources.......................................... 19
11.2 Trademarks ........................................................... 19
11.3 Electrostatic Discharge Caution ............................ 19
11.4 Glossary ................................................................ 19
12 Mechanical, Packaging, and Orderable
Information ........................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (October 2014) to Revision A
Page
• Updated unit for RDS(ON) .......................................................................................................................................................... 5
• Corrected lines for Figure 6 ................................................................................................................................................. 10
• Added Community Resources ............................................................................................................................................. 19
2 Submit Documentation Feedback
Product Folder Links: DRV8848
Copyright © 2014–2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design DRV8848 SL LSEL7A – OCTOBER 2014 – REVISED NOV EMBER 2015 DRV8848 Dual H-Bridge Motor Driver 1 Features •1 Dual H-Bridge M otor Driver – Single/Dual Brushed DC – Stepper • PWM Control Interface Optional Current Regulation With 20- μs Fixed Off- Time • High Output Cur rent per H-Bridge – 2-A Maximum Drive r Current at 12 V and TA = 25°C – Pa rallel Mode Available Capable of 4-A Ma ximum Driver Current at 12 V and TA = 2 5°C • 4- to 18-V Operating Supply Vo ltage Range • Low-Current 3-µA Sleep Mode • Thermally-Enhanced Surface Mo unt Package • Protection Features – VM Undervoltage Lockout (UVLO) – Ove rcurrent Protection (OCP) – Thermal S hutdown (TSD) – Fault Condition Indic ation Pin (nFAULT) 2 Applications • A ppliances • General Brushed and Stepp er Motors • Printers 3 Description T he DRV8848 provides a dual H-bridge motor driver for home appliances and other mechatronic applications. The .
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