ZXBM2001 Zetex Semiconductors, ZXBM2001 Datasheet - Page 7

• Manufacturer Part Number: ZXBM2001
• Description: VARIABLE SPEED 2-PHASE FAN MOTOR CONTROLLER
• Manufacturer: Zetex Semiconductors

When driving fans with bipolar transistors, at higher
voltages it may be necessary to provide extra noise
protection by the addition of a diode from the driver
collector to Gnd on each phase. This prevents negative
voltage excursions from the windings affecting
operation. See Figure 3 right, showing the placement
of these diodes. It should be noted that these are not
required for the MOSFET solution in Figure 2 as the
diodes are inherent in the MOSFET structure.
Zetex provide a variety of suitable power transistors for
using with the ZXBM200x series of 2-phase DC
brushless motor pre-drivers and suitable devices
sufficient for a range of applications are given in the
following table.
SUMMARY TABLE OF SUITABLE DEVICES
Notes:
1
2
3
4
ISSUE 1 - APRIL 2002
Contact your nearest Zetex office for further details and technical enquiries.
Dual device
Provisional information
Advanced information
ZXMN3A04DN8
ZXMN6A09DN8
ZXT13N50DE6
MOSFET Types
Bipolar Types
FZT1053A
FZT851
2 3
2 3
BV DSS (V)
V CEO (V)
75
60
50
30
60
I C (A)
I D (A)
4.5
7.6
6
4
5
7
TYPICAL APPLICATION (ZXBM2001)
illustrating addition of Clamp diodes.
Figure 3
min H FE @ I C
300 @ 0.5A
100 @ 2A
300 @ 1A
I PEAK (A)
(Pulsed)
17.6
ZXBM2001
ZXBM2002 ZXBM2003
25
200@1A,10mA
100@1A,10mA
100@1A,10mA
R DS(on) (mW)
V CE(sat) max
@ I C & I B
20 @ 10V
45 @ 10V
@ V GS
(mV)
Package
Package
SOT23-6
SOT223
SOT223
SO8
SO8