DRV421_15 Datasheet, PDF (28/44 Pages) Texas Instruments – DRV421 Integrated Magnetic Fluxgate Sensor for Closed-Loop Current Sensing

DRV421
SBOS704A – MAY 2015 – REVISED JULY 2015
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Application Information (continued)
8.1.2 Protection Recommendations
Inputs AINP and AINN require external protection to limit the voltage swing to within 6 V beyond both supply
rails. Driver outputs ICOMP1 and ICOMP2 handle high-current pulses protected by internal clamp circuits to the
supply voltage. If large magnitude overcurrents are expected, connect external Schottky diodes to the supply
rails to protect the DRV421 from damage.
CAUTION
Large overcurrents may drive the power supply above the normal operating voltage.
Route large overcurrent pulses away from the device using diodes connected to the
supply, as shown in the Typical Application on the front page. To prevent these pulses
from driving up the supply voltage, and prevent damage to the DRV421 and other
components in the circuit, use an additional supply clamp, as shown in Figure 64. All
other pins offer standard protection; see the Absolute Maximum Ratings.
VDD
Figure 64. Additonal Supply Clamp for the DRV421
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