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| MAX14871_14 Datasheet, PDF (8/15 Pages) Maxim Integrated Products – 4.5V to 36V Full-Bridge DC Motor Driver | |||
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MAX14871
4.5V to 36V Full-Bridge DC Motor Driver
Pin Configuration
TOP VIEW
COM 1
M1 2
M1 3
VDD 4
SNS 5
PWM 6
DIR 7
MODE 8
+
*EP
MAX14871
16 COM
15 M2
14 M2
13 VDD
12 VREF
11 EN
10 FAULT
9 TCOFF
TSSOP-EP
* EP = Exposed Pad. Connect to ground plane.
Pin Description
PIN
1, 16
2, 3
4, 13
5
6
7
8
9
NAME
COM
M1
VDD
SNS
PWM
DIR
MODE
TCOFF
FUNCTION
COM Current Output. Connect a sense resistor, RSENSE, from COM to GND to use internal current
regulation and/or external current control. Connect both COM pins together.
Motor Driver Output 1. See the Function Tables for more information. Connect both M1 pins together.
Power Supply Input. Bypass VDD to GND with a 1μF ceramic capacitor as close to the device as
possible. Connect both VDD pins together.
Current Sense Input. Connect SNS to COM to enable current regulation. To bypass current regulation,
connect SNS to GND.
PWM Control Logic Input. PWM and DIR control M1 and M2. See the Function Tables for more
information.
Direction Control Logic Input. PWM and DIR control M1 and M2. See the Function Tables for more
information.
Current Regulation Mode Select Input. Connect MODE to GND for fast decay regulation. Connect
VMODE > 1.5V for slow decay current regulation. Connect 0.5V ⤠VMODE ⤠1V for fast decay with 25%
ripple. MODE has a 1M⦠internal pull-down resistor.
Current Regulation Timing Control. For external VREF-based current regulation, connect a capacitor
to TCOFF to set the off-time (tOFF). For internal VREF-based current regulation leave TCOFF uncon-
nected when using internal VREF-based current regulation. See the Current Regulation section for more
information.
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