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MLX90804SA-X Datasheet

  • MLX90804SA-X

  • Speed regulator for universal motors

  • 12頁

  • ETC

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MLX90804
Speed regulator for universal motors
Features and Benefits
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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
Oscillator
PLL
Triac T R G
drive
Voltage
regulator
VDD1
Gate
sensing
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, 鈥?/div>
SYN
Zero
crossing
detector
Control
logic
SPD
SET
ADC
MLX902xx Name of Sensor
MLX90804 Speed regulator for universal motors
Rev Y.X
1
Page
22/Aug/98
Rev 1.0
Page 1
30/Jun/00

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