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ML4423IP Datasheet(PDF) 3 Page - Micro Linear Corporation

No. de pieza ML4423IP
Descripción Electrónicos  1, 2, or 3-Phase Variable Speed AC Motor Controller
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Fabricante Electrónico  MICRO-LINEAR [Micro Linear Corporation]
Página de inicio  http://www.microlinear.com
Logo MICRO-LINEAR - Micro Linear Corporation

ML4423IP Datasheet(HTML) 3 Page - Micro Linear Corporation

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ML4423
3
PIN DESCRIPTION
PIN
NAME
FUNCTION
1
FB A
Differential input which, in
conjunction with FB C, feeds back the
voltage applied across motor winding
A-C.
2
FB C
Input which feeds back the voltage
applied to motor winding C. Reference
voltage for windings A and B.
3
FB B
Differential input which, in
conjunction with FB C, feeds back the
voltage applied across motor winding
B-C.
4VMIN
The voltage on this pin sets the
minimum sinewave amplitude at low
speeds.
5VSPEED
The voltage on this pin sets the
frequency and amplitude of the
sinewaves generated at SINEA and
SINEB.
6RSPEED
An external resistor to ground provides
a variable current to the sinewave
generator. The current is proportional
to VSPEED.
7VREF
8V reference output which can be
used for setting VSPEED and VMIN.
8RREF
An external resistor to ground provides
a constant current used for setting the
PWM frequency in conjunction with
CT.
9RDT
An external resistor to ground sets the
deadtime in the output stage to
prevent cross-conduction in the power
devices.
10
SINE A-C
A test output for observing the
internally generated sinewave used for
motor winding A-C.
11
SINE B-C
A test output for observing the
internally generated sinewave used for
motor winding B-C.
12
CO
An external capacitor to ground sets
the sinewave frequency in conjunction
with VSPEED and RSPEED.
PIN
NAME
FUNCTION
13
CT
An external capacitor to ground sets
the PWM triangle frequency in
conjunction with the external resistor
RREF.
14
COAST
A logic low input causes all output
drive transistors to turn OFF. An
internal pull-up drives COAST to VDD
if left unconnected.
15
F/R
A logic high input causes phase A to
lead phase B, while a logic low input
causes phase A to lag phase B. An
internal pull-up drives F/R to VDD if
left unconnected.
16
ISENSE
Motor current sense input.
17
GND
Signal and power ground.
18
3PH/2PH
Leaving this pin unconnected selects
3-phase drive. Connecting this pin to
VDD selects single/2-phase drive.
19
LB
Low side drive output for phase B.
20
LC
Low side drive output for phase C.
21
LA
Low side drive output for phase A.
22
HB
High side drive output for phase B.
23
HC
High side drive output for phase C.
24
HA
High side drive output for phase A.
25
5V/12V
Input to select 5V or 12V output drive.
SELECT
Leaving this pin unconnected selects
5V output drive levels at the driver
outputs. Connecting this pin to VCC
selects 12V output drive levels at the
driver outputs.
26
VDD
12V power supply input.
27
CGM1
An external capacitor to ground sets a
pole in the feedback loop.
28
CGM2
An external capacitor to ground sets a
pole in the feedback loop.


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