DRV8870_16 Datasheet, PDF (1/25 Pages) Texas Instruments – Brushed DC Motor Driver

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
DRV8870
SLVSCY8A – AUGUST 2015 – REVISED JANUARY 2016
DRV8870 3.6-A Brushed DC Motor Driver (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 R_DS(on) (HS + LS)
• 3.6-A Peak Current Drive
• PWM Control Interface
• Integrated Current Regulation
• Low-Power Sleep Mode
• Small Package and Footprint
– 8-Pin HSOP With PowerPAD™
– 4.9 × 6.0 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 DRV8870 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 DRV8870 features integrated current regulation,
based on the analog input VREF and the voltage on
pin ISEN, which is proportional to motor current
through an external sense resistor. 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 under-voltage (UVLO), over-current
(OCP), and over-temperature (TSD). When the fault
condition is removed, the device automatically
resumes normal operation.
Device Information ⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8870
HSOP (8)
4.90 mm × 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
SPACE
Simplified Schematic
6.5 to 45 V
H-Bridge States
Controller
DRV8870
3.6 A
IN1
IN2 _{Brushed DC}
BDC
Motor Driver
VREF
Current
Regulation
Fault
Protection
ISEN
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.