ZXBM2003X10TA Diodes Zetex, ZXBM2003X10TA Datasheet - Page 6

• Manufacturer Part Number: ZXBM2003X10TA
• Description: IC MOTOR CTLR FAN 2PH 10-MSOP
• Manufacturer: Diodes Zetex

Specifications of ZXBM2003X10TA

• Applications: Fan Controller, 2 Phase
• Number Of Outputs: 1
• Voltage - Supply: 4.5 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Voltage - Load: -
• Other names: ZXBM2003X10TATR

Locked Rotor timing capacitor (CONT).
As these threshold voltages are nominally set to
V
as follows:
8. C
This pin has an external capacitor attached to set the
PWM frequency for the Phase drive outputs. A
capacitor value of 0.15nF will provide a PWM
frequency of typically 24kHz.
The C
following equation:
Where T
Where V
voltages and I
discharge currents.
As these threshold voltages are nominally set to
V
as follows:
ZXBM2001
ZXBM2002 ZXBM2003
THH
THH
T
PWM
S E M I C O N D U C T O R S
lock
=2V and V
=2V and V
LCK
T
=
lock
PWM
THH
2
C = C
I
timing period (T
PWM
×
I
=
LCKC
- Sets PWM frequency
- external PWM input
C
(V
is in s
and V
LCK
PWM
& I
THL
PWMC
THL
THH
PWMD
=1V the equations can be simplified
=1V the equations can be simplified
I
- V
PWMC
+15 in pF
THL
and I
THL
T =
on
are in A
)
are the C
×
pwm
C
PWMD
C
I
LCKC
LCK
+
) is determined by the
(V
THH
are the charge and
PWM
−
I
PWMD
V
THL
pin threshold
T
)
off
×
=
C
C
I
LCKD
LCK
6
The C
externally derived PWM signal to control the motor
speed. The signal should have a VOL <1V and a VOH
>2V. A standard TTL or CMOS digital signal is ideal.
When driving from an external PWM source no
capacitor should be attached to the C
SPD pin should be left open circuit.
9. PH2
10. PH1
These are the Phase drive outputs and are open
darlington emitter followers designed to provide up to
80mA of drive to external transistors as shown in the
Application circuits following. The external transistors
in turn drive the fan motor windings.
PWM
- External transistor driver
- External transistor driver
pin can also be used as in input for an
T
PWM
=
I
PWMC
C
ISSUE 4 - OCTOBER 2004
+
I
PWMD
C
PWM
pin and the