MLX90804 データシートの表示（PDF） - Melexis Microelectronic Systems

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MLX90804

Speed regulator for universal motors

Melexis Microelectronic Systems  

MLX90804

Speed regulator for universal motors

Features and Benefits

• Low cost - minimal external components

• In PDIL8, PSOP8 or Chip-on-board

• 50/60Hz operation

• Robust digital design:

•

Offering stable triac control

•

Eliminating variations due to changes in analogue parameters

•

No aging and temperature influences

• True PI speed regulator

• No external calibration or adjustment required

• Low power consumption

• Suited for driving resistive and inductive loads

• Pulse input to measure the motor speed with a low cost coil or a hall sensor

• Motor current sensing for power limitation

• Adaptable to specific motor and application requirements by mask programming

Applications

Universal motor control applications that require true speed regulation, such as used in

blenders, mixers, kitchen appliances, drills, etc

Ordering Information

Part No.

Temperature Suffix

Package

version

Temperature Range

MLX90804

S

A

-x

0C to 85C Automotive

The customer specific version code (defining the options) is indicated with 1 character at the end of the ordering

number.

Functional Diagram

90804

VDD

VSS

Voltage

regulator

VDD1

Gate

sensing

Oscillator

PLL

SYN

SPD

Zero

crossing

detector

Triac TRG

drive

Control

logic

SET

ADC

Description

The MLX90804 is a power control IC for controlling

the speed of AC motors by means of a triac. The

speed setting is done by applying a ratiometric

voltage at pin SET (usually by means of a

potentiometer). This speed setting is compared with

the pulse rate at the SPD input. The input is

compatible with inductive and magnetic detectors.

The calculation of the required phase angle is done

with a PI regulator, which is fully digital.

A soft start function is implemented to eliminate high

current peaks at startup. Also available are an

overload and overspeed protection.

The build in Frequency Locked Loop compensates

for variations in the mains frequency giving a stable

frequency independent trigger control.

Several parameters can be adjusted by mask

programming: minimum and maximum speed, soft

start delay, gain settings of the PI regulator, …

MMLLXX990028xx04NaSmpeeeodf Sreegnusloartor for universal motors RePvaYg.Xe 1

22/Aug/98 Rev 1.0 3P0/aJguen1/00

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