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DRV8843PWP Datasheet(数据表) 11 Page - Texas Instruments

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部件型号  DRV8843PWP
说明  DUAL H-BRIDGE DRIVER IC
下载  19 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
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DRV8843PWP Datasheet(HTML) 11 Page - Texas Instruments

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DRV8843
www.ti.com
SLVSAS8A
– APRIL 2011 – REVISED MAY 2011
Overcurrent Protection (OCP)
An analog current limit circuit on each FET limits the current through the FET by removing the gate drive. If this
analog current limit persists for longer than the OCP time, all FETs in the H-bridge will be disabled and the
nFAULT pin will be driven low. The device will remain disabled until either nRESET pin is applied, or VM is
removed and re-applied.
Overcurrent conditions on both high and low side devices; i.e., a short to ground, supply, or across the motor
winding will all result in an overcurrent shutdown. Note that overcurrent protection does not use the current sense
circuitry used for PWM current control, and is independent of the ISENSE resistor value or VREF voltage.
Thermal Shutdown (TSD)
If the die temperature exceeds safe limits, all FETs in the H-bridge will be disabled and the nFAULT pin will be
driven low. Once the die temperature has fallen to a safe level operation will automatically resume.
Undervoltage Lockout (UVLO)
If at any time the voltage on the VM pins falls below the undervoltage lockout threshold voltage, all circuitry in the
device will be disabled and internal logic will be reset. Operation will resume when VM rises above the UVLO
threshold.
Copyright
© 2011, Texas Instruments Incorporated
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