ZXBM200X 查看數據表（PDF） - Diodes Incorporated.

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ZXBM200X

ZXBM200x SERIES OF VARIABLE SPEED 2-PHASE FAN MOTOR CONTROLLER

Diodes Incorporated. 

Applications Note AN36

Issue1 - JULY 2002

6V supply with ‘naked’ hall and

bipolar drive

The first example in Figure 13 is for a 6V axial

fan driver. The design uses an unbuffered

Hall sensor and bipolar drive transistors. The

Zetex FMMT619 transistor will furnish output

powers up to 2W with the SOT23 package,

however, in excess of this the SOT89 package

(FCX619) might be more suitable if driver

temperature is excessive. Measurements of

the fan speed verses the thermistor

temperature is shown in the accompanying

graph in Figure 14.

12V Supply with buffered Hall and

MOSFET drivers

This second example in Figure 15 shows a

complete circuit using MOSFET drivers and a

12V supply. It also makes use of the more

common buffered Hall sensor. The output

devices are the Zetex ZXMN6A11G MOSFETs

which are rated at 60V so the clamping is

achieved with 56V Zeners. Avalanche

problems are averted by not attempting to

turn the MOSFETs off too quickly and 1k⍀ for

R3 and R4 meets those aims. It should be

suitable for powers up to 20W. The speed

response is shown in Figure 16.

Figure 13

6V Axial Fan using bipolar drive.

Figure 15

12V motor with MOSFET drive.

Figure 14.

AN 36 - 10

Figure 16.

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