MLX90805SA-X Просмотр технического описания (PDF) - Melexis Microelectronic Systems
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MLX90805SA-X Datasheet PDF : 13 Pages
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MLX90805
Intelligent Triac Controller
Pinout
Standard package is 8-pin dual inline package.
(Known as DIP-8, PDIP-8, DIL-8 and PDIL-8)
Pin Name Type Description
1
SET Input Potentiometer input
2
THP Input Thermal protection
3
FB Input Feed back to create
hysteresis for thermal
protection
4
ZC Input Zero cross input
5
TRG Output Triac driver output
6
VSS Supply Ground
7
VDDA Supply Supply, high level
8
VREF Output Reference voltage
Precautions
Options
The following options are available:
Firing angle definition
The firing angles, and corresponding motor speeds,
can be defined in ROMi[9:0]. This is the ROM table
which is addressed by the ADC reading the
potentiometer setting. The ROM contains 16 words
of 10 bits. For programming the different speed
settings in the ROM table, following formula can be
used, given ti (in msec) is the delay from the
previous zero crossing to the moment of ignition:
ROMi [ 9 : 0 ] = ti • 2 • Fmains − 10
With: Fmains = frequency of the mains (in Hz)
Note:
The value should not be negative: very small values
can not be programmed.
The content of the ROM can be defined freely: it
does not need to be linear or continuous. However
for a proper softstart generation under all conditions,
the value with minimum firing angle (thus maximum
speed) must be in the highest ROM address.
Default values:
Disturbance Immunity
According to pr EN 55014-2
ESD
All I/O pins must withstand the normalized ESD
pulses up to 2kV (100pF / 1.5 kΩ). The pins will be
stressed in both polarities, with respect to the combi-
nation of all supply pins.
Rom address
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
MLX90805 Intelligent Triac Controller
Page 6
Value
590
567
544
522
500
477
456
434
411
387
362
335
305
273
231
112
Rev 1.2 17/May/00
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