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MLX90805SA-X Datasheet

  • MLX90805SA-X

  • Intelligent Triac Controller

  • 13頁

  • ETC

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MLX90805
Intelligent Triac Controller
Features and Benefits
鈥淪oft Start鈥?Eliminates Current Surges
Integrated Design Eliminates External Components
Drives Virtually Any Resistive or Inductive Load
Built鈥搃n Thermal Protection
Digital Design For Stable Triac Control
Immune to Lifetime and Thermal Drift
Low Power Consumption
50Hz/60Hz Operation
Applications
AC Light Dimmer
Soft-Start AC Motor Controller
Variable-Speed AC Motor Controller
Ordering Information
Part No.
Temperature Suffix
Package
version
Temperature Range
MLX90805
S
A
-x
0C to 85C
MLX90805
S
L
-x
0C to 85C
The customer specific version code (defining the options) is indicated with 1 character at
the end of the ordering number.
Functional Diagram
Description
The MLX90805 is a power control IC ideally suited
for
control of any resistive or inductive load
regulated by a triac.
The chip was designed primarily for starting and
speed control of AC motors, but will work equally well
with any Inductive or resistive load such as
Incandescent lights.
The chip鈥檚 primary purpose is to provide a 鈥渟oft start鈥?/div>
for a motor, preventing current inrush. The triac is
controlled by a linear 鈥渞amp鈥?from minimum to
maximum power. Start rate can be varied from 0.5
sec. to 3 sec, by changing the option bits.
The secondary function of the 90805 is proper
ignition of the triac for inductive and resistive loads,
while keeping the triac鈥檚 current consumption to a
minimum.
Added features include a frequency locked loop for
stable ignition point.
Vss
90805
Voltage
regulator
Vdda
Power monitoring
and reset
ZCD
zero
crossing
detector
Triac driver
Auto
retriggering
SET
ADC
Lookup
ROM
Vref/2
COMP
Logic
Vref
Options
Vref
THP
FB
MLX902xx Name of Sensor
Controller
MLX90805 Intelligent Triac
Rev Y.X
1
Page
22/Aug/98
Page 1
Rev 1.2 17/May/00

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