ML4423CP Micro Linear, ML4423CP Datasheet

ML4423CP

Manufacturer Part Number

ML4423CP

Description

1,2, or 3-phase variable speed AC motor controller

Manufacturer

Micro Linear

Datasheet

1.ML4423CP.pdf (10 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ML4423CP

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Quantity:

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GENERAL DESCRIPTION

The ML4423 provides the PWM sinewave drive signals

necessary for controlling three phase AC induction motors as

well as single and two phase split capacitor AC induction

motors.

A constant voltage/frequency ratio can be maintained

over a frequency range of greater than 10:1, providing

15Hz to 150Hz control. The output variable frequency AC

voltages are sensed and fed back to the controller to track the

sinewave frequency and amplitude set at the speed control

input. Direction, on two and three phase motors, is controlled

by changing the relative phase difference between the motor

windings: 90 for two phase motors and 120 and 240 for three

phase motors.

To protect the motor, power devices, high voltage drivers

and control circuitry, the ML4423 includes fixed period,

pulse by pulse variable duty cycle current limit, deadtime

circuitry, and undervoltage lockout. The ML4423 has

selectable output voltage swing of 5V or 12V for

interfacing to different high side drivers and power devices.

BLOCK DIAGRAM

FB A

FB C

FB B

C O

V SPEED

V MIN

R SPEED

1, 2, or 3-Phase Variable Speed AC Motor Controller

–

CONTROL

SPEED

–

SINE A-C

GENERATOR

SINE A

SINE B

SINE B-C

GENERATOR

SINE C

OSCILLATOR

PWM

C T

FEATURES

(* Indicates Part Is End Of Life As Of July 1, 2000)

Drives single, two, and three phase AC motors

Greater than 10:1 variable speed control range

Constant V/F ratio with programmable end points

Reverse capability for two and three phase motors

Low distortion PWM sinewave drive

Eliminates run capacitors in PSC motors

Coast function for quick power disable

Low cost interface for various gate drivers

PWM current limit, undervoltage lockout, and

programmable deadtime

12V 20% operation with onboard 8V reference

CONTROL

F/R

WAVE

PWM

SINE

3PH/2PH

UVLO

V DD

REFERENCE

GND

OUTPUT

DRIVERS

GATING

LOGIC

ML4423*

R REF

COMP

–

5V/12 SELECT

V REF

COAST

0.5V

I SENSE

July 2000

R DT

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ML4423CP Summary of contents

Page 1

Variable Speed AC Motor Controller GENERAL DESCRIPTION The ML4423 provides the PWM sinewave drive signals necessary for controlling three phase AC induction motors as well as single and two phase split capacitor AC induction motors. A ...

Page 2

ML4423 PIN CONFIGURATION 2 ML4423 28-Pin Narrow PDIP (P28N) 28-Pin SOIC (S28) SENSE GM2 SENSE GM1 SENSE MIN 4 25 5V/12V SELECT HA V SPEED 5 ...

Page 3

PIN DESCRIPTION PIN NAME FUNCTION Differential input which, in conjunction with FB C, feeds back the voltage applied across motor winding A- Input which feeds back the voltage applied to motor winding C. Reference ...

Page 4

ML4423 ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied .............................................................................................. Output Drive Current ........................................... 50mA ...

Page 5

FUNCTIONAL DESCRIPTION The ML4423 generates 2 reference sinewaves separated by 90º or 60º closed loop feedback system. These sinewaves can be varied in amplitude and frequency by the speed input. Signals across the motor windings are fed back ...

Page 6

ML4423 Current Limit Motor current is sensed on I (pin 16). R SENSE be selected so that LIMIT I MAX For a 2A current limit 0.25 . The 1k LIMIT and 330pF capacitor ...

Page 7

F 0. SINE REF 7 0 REF R REF 8 200k SINE A 100k V SPEED 5 FREQ. 0.1 F SPEED CONTROLLER R SPEED AMPLITUDE 6 160k ...

Page 8

ML4423 Figure 4. ML4423 Output Stage Using IR2118 High Side Drivers 8 ...

Page 9

PHYSICAL DIMENSIONS 28 PIN 0.180 MAX (4.57 MAX) 0.125 - 0.135 (3.18 - 3.43) 0.699 - 0.713 (17.75 - 18.11) 28 PIN 0.024 - 0.034 0.050 BSC (0.61 - 0.86) (1.27 BSC) (4 PLACES) ...

Page 10

... ML4423 ORDERING INFORMATION PART NUMBER ML4423CP (End Of Life) ML4423CS (End Of Life) ML4423IP (End Of Life) ML4423IS (End Of Life) © Micro Linear 2000 registered trademark of Micro Linear Corporation. All other trademarks are the property of their respective owners. Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; ...

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