DRV8848_15 Datasheet, PDF (1/28 Pages) Texas Instruments – DRV8848 Dual H-Bridge Motor Driver

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DRV8848 Dual H-Bridge Motor Driver
DRV8848
SLLSEL7 – OCTOBER 2014
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
T_A = 25°C
– Parallel Mode Available Capable of 4-A
Maximum Driver Current at 12 V and
T_A = 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
T_A = 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.
4 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.