DRV401-Q1 Datasheet, PDF (1/39 Pages) Texas Instruments – DRV401-Q1 Sensor Signal Conditioning Device for Closed-Loop Magnetic Current Sensor

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DRV401-Q1 Sensor Signal Conditioning Device
for Closed-Loop Magnetic Current Sensor
DRV401-Q1
SBOS814 – DECEMBER 2016
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level 1C
– Device CDM ESD Classification Level C6
• Single-Supply: 5-V
• Power Output: H-Bridge
• Designed for Driving Inductive Loads
• Excellent DC Precision
• Wide System Bandwidth
• High-Resolution, Low-Temperature Drift
• Built-In Degauss System
• Extensive Fault Detection
• External High-Power Driver Option
• Compact Footprint
2 Applications
• Automotive
• Motor Control in Automotive Applications
• Flux Gate Current Sensing
• Generator and Alternator Monitoring and Control
• Frequency and Voltage Inverters
• Motor Drive Controllers
• System Power Consumption
• Photovoltaic Systems
3 Description
The DRV401-Q1 device is fully qualified for
automotive applications and is suitable for motor
control drive and battery monitoring systems.
When used with a magnetic sensor, the DRV401-Q1
monitors ac and dc currents to high accuracy.
Provided functions include: probe excitation, signal
conditioning of the probe signal, signal loop amplifier,
an H-bridge driver for the compensation coil, and an
analog signal output stage that provides an output
voltage proportional to the primary current. It offers
overload and fault detection, as well as transient
noise suppression.
The DRV401-Q1 device directly drives the
compensation coil or connects to external power
drivers. Therefore, the DRV401-Q1 combines with
sensors to measure small to large currents.
To maintain the highest accuracy, the DRV401-Q1
demagnetizes (degausses) the sensor at power-up
and on demand.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV401-Q1
VQFN-20
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Closed-Loop Magnetic Sensing
Patents Pending
Compensation Winding
Primary Winding
Magnetic Core
Field Probe
I_P
Compensation
R_S
PWM PWM
I_COMP1
I_COMP2
DRV401-Q1
IS2
IS1
Probe
Interface
Integrator
Filter
H-Bridge
Driver
Timing, Error Detection,
and Power Control
Degauss
Diff
Amp
V_REF
V_OUT
REF_IN
V_REF
+5 V GND
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.