DRV8871_16 Datasheet, PDF (1/25 Pages) Texas Instruments – Brushed DC Motor Driver With Internal Current Sense (PWM Control)

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DRV8871
SLVSCY9A – AUGUST 2015 – REVISED JANUARY 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 R_DS(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 × 6.0 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 DRV8871 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 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 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)
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.
SPACE
Simplified Schematic
6.5 to 45 V
Peak Current Regulation
Controller
DRV8871
IN1
IN2 _{Brushed DC}
Motor Driver
ILIM
Current
Sense and
Regulation
Fault
Protection
3.6 A
BDC
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.