DRV401AMDWPREP datasheet(15/33 Pages) TI

Il numero della parte	DRV401AMDWPREP

Spiegazioni elettronici	SENSOR SIGNAL CONDITIONING IC FOR CLOSED-LOOP MAGNETIC CURRENT SENSOR

PDF	33 Pages

Scroll/Zoom	100%

Produttore elettronici	TI [Texas Instruments]

Homepage	http://www.ti.com

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15 / 33 page

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.

500ns/div

V (IS1)

V (PWM)/10

500ns/div

V (IS1)

V (PWM)/10

Ω

IS2

IS1

Probe

DD1

PWM

CMP

Ω

REF = 0.5V

NOTE: MOS components function as switches only.

Ω

DRV401-EP

www.ti.com............................................................................................................................................................................................... SBVS104 – JANUARY 2008

Figure 2. Magnetic Probe, Hysteresis, and Duty Cycle

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