SS732/SS632

Hall Latch - High Sensitivity

DC Operating Parameters TA = -40 C to 150 C, VDD = 2.5V to 24V (unless otherwise specified)

rameter

Test Conditions(SO)

OUT(SO)

Test Conditions(UA)

OUT(UA)

Pa

So

B

uth pole

High

Low

Nort

Low

High

h pole

Outp

ersus magnetic pole

ut behaviour v

pplication Information

s strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the

supply(VDD Pin) and ground(GND Pin) of the device to reduce both external noise and noise generated by the chopper stabilization

technique. As is shown in the two figures in next page, a 0.1μF capacitor is typical.

A

It i

ed to connect a resistor or a diode in series with the VDD pin. When using a

CC

Us

Therefore, a 100Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended. Both solutions

provide

When a

figure 1

The low

ce

supply voltage V

. The diode D1 provides additional reverse voltage protection.

The S732 have been optimized for commutation applications in 5V and 12V brushless D

The follow figure is the typical

application circuit for 3 phase brushless DC motors.

For reverse voltage protection, it is recommend

resistor, three points are important:

- the resistor has to limit the reverse current to 50mA maximum (VCC / R1 ≤ 50mA)

- the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1*IDD)

- the resistor has to withstand the power dissipated in reverse voltage condition (PD = V

ing a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V).

the required reverse voltage protection.

weak power supply is used or when the device is intended to be used in noisy environment, it is recommended that

3.3 from the Application Information section is used.

-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occurring on the devi

DD

                                      

 

6

V2.00

May.1,

                       

2012

C motors.

S732

R2

C2

VDD

GND

OUT

C1

S732

R1:100

Automotive and Severe Environment

Protection Circuit

Typical Three-Wire Application Circuit

R2

C2

VDD

GND

C1

OUT

Z1

D1