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DRV8313PWP Datasheet(数据表) 13 Page - Texas Instruments

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部件型号  DRV8313PWP
说明  2.5-A Triple 1/2-H Bridge Driver
下载  37 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
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DRV8313PWP Datasheet(HTML) 13 Page - Texas Instruments

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DRV8313
www.ti.com
SLVSBA5C – OCTOBER 2012 – REVISED NOVEMBER 2015
Product Folder Links: DRV8313
Submit Documentation Feedback
Copyright © 2012–2015, Texas Instruments Incorporated
7.3.5 Protection Circuits
The DRV8313 has full protection against undervoltage, overcurrent, and overtemperature events.
7.3.5.1 Undervoltage Lockout (UVLO)
If at any time the voltage on the VM pin falls below the undervoltage threshold voltage (VUVLO), all FETs in the H-
bridge will be disabled, the charge pump will be disabled, the internal logic is reset, and the nFAULT pin will be
driven low. Operation will resume when VM rises above the UVLO threshold. The nFAULT pin will be released
after operation has resumed.
7.3.5.2 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. The nFAULT
pin will be released after operation has resumed.
7.3.5.3 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 tOCP, the device disables the channel experiencing the overcurrent
and drives the nFAULT pin low. The driver remains off until either assertion of nRESET or the cycling of VM
power.
Overcurrent conditions on both high- and low-side devices, that is, a short to ground, supply, or across the motor
winding, all result in an overcurrent shutdown.
Table 2. Fault Condition Summary
FAULT
CONDITION
ERROR
REPORT
H-BRIDGE
CHARGE
PUMP
V3P3
RECOVERY
VM undervoltage
(UVLO)
VM < VUVLO
(max 8 V)
nFAULT
Disabled
Disabled
Operating
VM > VUVLO
(max 8 V)
Thermal Shutdown
(TSD)
TJ > TTSD
(min 150°C)
nFAULT
Disabled
Operating
Operating
TJ < TTSD - THYS
(THYS typ 35°C)
Overcurrent
(OCP)
IOUT > IOCP
(min 3 A)
nFAULT
Disabled
Operating
Operating
nRESET




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