DRV8816 Datasheet, PDF (9/17 Pages) Texas Instruments – DMOS DUAL 1/2-H-BRIDGE MOTOR DRIVERS

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VOUT+
VOUT- ^High-Z
DRV8816
SLRS063 – SEPTEMBER 2013
IPEAK
IOUTx
IOCP
Enable,
Source
or Sink
tBLANK
tOCP
nFAULT
Motor Lead
Short Condition
Normal DC
No Fault Condition
VPROPI
The VPROPI output is equal to approximately five times the voltage present on the SENSE pin. VPROPI is
meaningful only if there is a resistor connected to the SENSE pin; If SENSE is connected to ground, VPROPI
measures 0 V. Also note that during slow decay (brake), VPROPI will measure 0 V. VPROPI can output a
maximum of 2.5 V, since at 500 mV on SENSE, the H-bridge is disabled.
Protection Circuits
The DRV8816 is fully protected against VBB undervoltage, charge pump undervoltage, overcurrent, and
overtemperature events.
VBB UNDERVOLTAGE LOCKOUT (UVLO)
If at any time the voltage on the VBB pin falls below the undervoltage lockout threshold voltage, all FETs in the
H-bridge will be disabled and the charge pump will be disabled. Operation will resume when VBB rises above the
UVLO threshold. Note that nFAULT does not indicate a UVLO because the CPUV fault is always asserted below
VBB = 12 V.
VCP UNDERVOLTAGE LOCKOUT (CPUV)
During a CPUV event, the VCP voltage is measured to be below VCP + 10 V. If at any time the voltage on the
VCP pin falls below the undervoltage lockout threshold voltage, the nFAULT pin will be driven low. The nFAULT
pin will be released after operation has resumed. Note that this fault does not disable the output FETs and allows
the device to continue operating. When VBB is below 12 V, this fault condition is always asserted and nFAULT is
pulled low.
Copyright © 2013, Texas Instruments Incorporated
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