DRV401-Q1 Datasheet, PDF (23/39 Pages) Texas Instruments – DRV401-Q1 Sensor Signal Conditioning Device for Closed-Loop Magnetic Current Sensor

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DRV401-Q1
SBOS814 – DECEMBER 2016
NOTE
The probe driver, the PWM signal filter, and the I_COMP driver continue to function in normal
mode. Only the ERROR flag is asserted in the case when an open compensation coil is
detected.
5. At power-on after V_DD1 crosses the 4-V threshold, the ERROR flag is low for approximately 42 μs.
6. A supply voltage low (brownout) condition lasts longer than 100 μs. Recovery is the same as power-up, with
or without a demagnetization cycle.
7.3.11 Protection Recommendations
The I_AIN1 and I_AIN2 inputs require external protection to limit the voltage swing beyond 10 V of the supply voltage.
The driver outputs I_COMP1 and I_COMP2 handles high current pulses protected by internal clamp circuits to the
supply voltage. If repeated overcurrents of large magnitudes are expected, connect external Schottky diodes to
the supply rails. This external protection prevents current flowing into the die.
The IS1 and IS2 probe connections are protected with diode clamps to the supply rails. In normal applications,
no external protection is required. The maximum current must be limited to ±75 mA.
All other pins offer standard protection. See the Absolute Maximum Ratings table for more information.
7.4 Device Functional Modes
The DRV401-Q1 has a single functional mode and is operational when the power supply voltages, V_DD1 and
V_DD2, are between 4.5 V and 5.5 V. For unusual operating conditions where a brownout condition may occur the
DRV401-Q1 may perform a power-on reset. See the Power-On and Brownout section for a complete description
of operation during a brownout.
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