DRV8837EVM Datasheet, PDF (6/14 Pages) Texas Instruments – LOW-VOLTAGE H-BRIDGE IC

DRV8837
SLVSBA4A – JUNE 2012 – REVISED AUGUST 2012
IN1
IN2
t₁
OUT1
Z
t₄
t₂
Z
t₃
OUT2
Z
Z
DRV8837
www.ti.com
OUTx
80%
20%
80%
20%
t5
t6
Figure 2. Input/Output Timing
T0542-01
FUNCTIONAL DESCRIPTION
Bridge Control
The DRV8837 is controlled using a PWM input interface, also called an IN/IN interface. Each output is controlled
by a corresponding input pin.
The following table shows the logic for the DRV8837:
IN1
IN2
OUT1
OUT2
Function (DC Motor)
0
0
Z
Z
Coast
0
1
L
H
Reverse
1
0
H
L
Forward
1
1
L
L
Brake
Sleep Mode
If the nSLEEP pin is brought to a logic-low state, the DRV8837 enters a low-power sleep mode. In this state, all
unnecessary internal circuitry is powered down.
Power Supplies and Input Pins
The input pins may be driven within their recommended operating conditions with or without the VCC and/or VM
power supplies present. No leakage current path exists to the supply. There is a weak pulldown resistor
(approximately 100 kΩ) to ground on each input pin.
6
Submit Documentation Feedback
Product Folder Links: DRV8837
Copyright © 2012, Texas Instruments Incorporated