DRV8860_16 Datasheet, PDF (8/41 Pages) Texas Instruments – 8-Channel Serial Interface Low-Side Driver

DRV8860, DRV8860A
SLRS065E – SEPTEMBER 2013 – REVISED NOVEMBER 2015
7.7 Typical Characteristics
1.90
1.85
1.80
1.75
1.70
1.65
1.60
1.55
1.50
0
10
20
30
40
50
VM Voltage (V)
C004
Figure 3. Output ON Resistance
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3.40
3.35
3.30
3.25
3.20
0
10
20
30
40
50
VM Voltage (V)
C004
Figure 4. VM Operating Supply Current
8 Detailed Description
8.1 Overview
The DRV8860 is an integrated 8-channel low side driver with overcurrent protection and open/short detection. It
has built-in diodes to clamp turn-off transients generated by inductive loads, and can be used to drive unipolar
stepper motors, DC motors, relays, solenoids, or other loads.
DRV8860 can supply up to 200 mA x 8 channel continuous output current. The current driving capability
increases with lower PWM duty cycle. A single channel can deliver up to 560 mA continuous output current.
Refer to the current capability table for details.
A serial interface is provided to control the DRV8860 output drivers, configure internal register settings, and read
the fault status of each channel. Multiple DRV8860 devices can be daisy-chained together to use a single serial
interface. Energizing-time and holding-PWM-duty cycle are configurable through the serial interface as well.
These functions allow for cooler running than traditional always-on solutions.
Internal shutdown functions are provided for overcurrent protection, short-circuit protection, under voltage lockout
and over temperature. DRV8860 can diagnosis an open load condition. DRV8860A does not include open load
detection. Fault information for each channel can be read out through serial interface and is indicated by an
external fault pin.
8
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