DRV8850_16 Datasheet, PDF (1/30 Pages) Texas Instruments – Low-Voltage H-Bridge IC with LDO Voltage Regulator

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DRV8850
SLVSCC0B – NOVEMBER 2013 – REVISED DECEMBER 2015
DRV8850 Low-Voltage H-Bridge IC with LDO Voltage Regulator
1 Features
•1 H-Bridge Motor Driver
– Drives a DC Motor, One Winding of a Stepper
Motor, or Other Loads
– Low MOSFET On-Resistance: 45 mΩ per FET
• 5-A Continuous 8-A Peak-Drive Current
• Internal Current Sensing With Current Sense
Output
• 2 to 5.5-V Operating Supply Voltage Range
• Overvoltage and Undervoltage Lockout
• Low-Power Sleep Mode
• 100-mA Isolated Low-Dropout (LDO) Voltage
Regulator
• 24-Pin VQFN Package
2 Applications
• Battery-Operated Applications With High Start-Up
Torque, such as:
– Personal Hygiene (Electric Toothbrushes,
Shavers)
– Toys
– RC Helicopters and Cars
– Robotics
3 Description
The DRV8850 device provides a motor driver plus
LDO voltage regulator solution for consumer
products, toys, and other low-voltage or battery-
powered motion-control applications. The device has
one H-bridge driver to drive a DC motor, a voice-coil
actuator, one winding of a stepper motor, a solenoid,
or other devices. The output driver block consists of
N-channel power MOSFETs configured as an H-
bridge to drive the load. An internal charge pump
generates the needed gate-drive voltages.
The DRV8850 device supplies up to 5 A of
continuous output current (with proper PCB heat
sinking) and up to 8-A peak current. It operates on a
supply voltage from 2 V to 5.5 V.
A low-dropout linear voltage regulator is integrated
with the motor driver to supply power to
microcontrollers or other circuits. The LDO voltage
regulator can be active in device sleep mode, so that
the driver may be shut down without removing power
to any devices powered by the LDO voltage
regulator.
Internal shutdown functions provide overcurrent, short
circuit,
undervoltage,
overvoltage,
and
overtemperature protection. In addition, the device
also has built-in current sensing for accurate current
measurement.
The DRV8850 device is packaged in a 24-pin VQFN
(3.5-mm × 5.5-mm) package (Eco-friendly: RoHS and
no Sb/Br).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV8850
VQFN (24)
5.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
2V to 5.5V
4 _INx
Controller
LDOEN
nSLEEP
LD OO UT
DRV8850
Low-Voltage
H-Bridge IC
Fault
Protection
Low Power
Sleep Mode
5A
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.