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DRV401AMDWPREP Datasheet(PDF) 15 Page - Texas Instruments

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Part # DRV401AMDWPREP
Description  SENSOR SIGNAL CONDITIONING IC FOR CLOSED-LOOP MAGNETIC CURRENT SENSOR
PDF  33 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

DRV401AMDWPREP Datasheet(HTML) 15 Page - Texas Instruments

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a) Simplified probe interface circuit.
The probe is connected between S1 and S2.
b) Without an external magnetic field, the hysteresis curve is
symmetrical and the probe loop generates 50% duty cycle.
c) An external magnetic flux (H) generated from the primary current
(IPRIM) shifts the hysteresis curve of the magnetic field probe in the
H-axis and the probe loop generates a nonsymmetrical duty cycle.
B
H
500ns/div
V (IS1)
V (PWM)/10
B
H
500ns/div
V (IS1)
V (PWM)/10
55
Ω
IS2
IS1
Probe
V
DD1
PWM
CMP
18
Ω
V
REF = 0.5V
NOTE: MOS components function as switches only.
55
Ω
DRV401-EP
www.ti.com............................................................................................................................................................................................... SBVS104 – JANUARY 2008
Figure 2. Magnetic Probe, Hysteresis, and Duty Cycle
Copyright © 2008, Texas Instruments Incorporated
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Product Folder Link(s): DRV401-EP



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