FEATURES
H-Bridge Motor Driver
Drives One DC Motor, One Winding of a
Stepper Motor, or Other Loads
Wide 6.8V to 45V Operating Voltage
3.6-A Peak Current Drive
PWM Control Interface
Integrated Current Regulation
Low-Power Sleep Mode
VM Undervoltage Lockout (UVLO)
Overcurrent Protection (OCP)
Thermal Shutdown (TSD)
Automatic Fault Recovery
ESOP8 Small Package and Footprint
APPLICATIONS
Printers
Appliances
Industrial Equipment
Other Mechatronics Applications
GENERAL DESCRIPTION
The TMI8870-Q1 devices are the brushed-DC
motor drivers 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 slow enter a low-power sleep
mode.
The TMI8870-Q1 devices feature integrated
current regulation, based on the analog input
VREF and the voltage on the ISEN pin, 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 devices are fully protected from faults and
short circuits, including UVLO,OCP,and TSD.