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TPL7407L 数据表(PDF) 11 Page - Texas Instruments

部件名 TPL7407L
功能描述  TPL7407L 40-V 7-Channel Low Side Driver
Download  23 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TPL7407L 数据表(HTML) 11 Page - Texas Instruments

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TPL7407L
IN3
IN4
OUT1
OUT2
OUT3
OUT4
IN5
IN6
IN7
GND
OUT5
OUT6
OUT7
COM
IN1
IN2
Phase_C
Phase_B
Phase_D
Motor
Phase_A
VSUP
Optional
CCOM
Motor Control Pulses
(1.8 V to 5 V)
TPL7407L
www.ti.com
SLRS066C – JANUARY 2014 – REVISED SEPTEMBER 2015
8.2.2 Unipolar Stepper Motor Driver
Figure 11. Stepper Motor Driver Schematic
8.2.2.1 Design Requirements
Figure 11 shows an implementation of TPL7407L for driving a uniploar stepper motor. The unconnected input
channels can be used for other functions. When an input pin is left open the internal 1 M
Ω pull down resistor
pulls the respective input pin to GND potential. For higher noise immunity use an external short across an
unconnected input and GND pins. The COM pin must be tied to the supply of whichever inductive load is being
driven for the driver to be protected by the free-wheeling diode.
Whenever a Zener diode is used between Vcom and the motor supply, the Vcom pin will slew from the coil
supply to a voltage that is the sum of the Zener voltage and the coil supply when there is a flyback event.
Depending on the coil inductance & resistance, this can be very rapid. Whenever the COM pin may experience a
slew rate greater than 0.5 V/µs a capacitor must be added to limit the slew to < 0.5 V/µs. See Power Supply
Recommendations for further explanation.
8.2.2.2 Detailed Design Procedure
Refer to Design Requirements.
8.2.2.3 Application Curves
Refer to Thermal Characteristics.
Copyright © 2014–2015, Texas Instruments Incorporated
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Product Folder Links: TPL7407L


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