Diodes AH277A Manuel d'utilisateur télécharger pdf (Page 8)

COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH277A

Oct. 2009 Rev. 1. 6 BCD Semiconductor Manufacturing Limited

Data Sheet

Typical Applications

Note 2: AH277A has Reversed Supply Voltage Protection. For DC fan application, sometimes need to test power

reverse connection condition. The internal diode only protects chip-side but not for coil-side. It is recommended to

add one external diode D1 in application to block the reverse current from coil-side as shown in Figure 13.

Figure 13. Typical Application Circuit with D1(Note 2)

Typical Performance Characteristics

(Continued)

Figure 11. Supply Current vs. Ambient Temperature Figure 12. Saturation Voltage vs. Ambient Temperature

-20 0 20 40 60 80

(mA)

(

=3.5V

=14V

=20V

-20 0 20 40 60 80

200

250

300

350

400

450

500

550

600

SAT

(mV)

(

=300mA

=350mA

=400mA

=14V

AH277A

DO DOB GND

COIL1 COIL2

470

2.2µF

1 2 3 4 5 6 7 8 9 10

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Diodes AH277A Manuel d'utilisateur Page 8