MLX90805 ETC [List of Unclassifed Manufacturers], MLX90805 Datasheet - Page 6

• Manufacturer Part Number: MLX90805
• Description: Intelligent Triac Controller
• Manufacturer: ETC [List of Unclassifed Manufacturers]

Pinout
Standard package is 8-pin dual inline package.
(Known as DIP-8, PDIP-8, DIL-8 and PDIL-8)
Precautions
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 k ). The pins will be
stressed in both polarities, with respect to the combi-
nation of all supply pins.
MLX90805 Intelligent Triac Controller
Pin
1
2
3
4
5
6
7
8
Name
SET
THP
FB
ZC
TRG
VSS
VDDA
VREF
Type
Input
Input
Input
Input
Output
Supply
Supply
Output
Description
Potentiometer input
Thermal protection
Feed back to create
hysteresis for thermal
protection
Zero cross input
Triac driver output
Ground
Supply, high level
Reference voltage
Page 6
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
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:
Rom address
Intelligent Triac Controller
9 [
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
:
] 0
ti
2
MLX90805
Rev 1.2 17/May/00
Fmains
Value
590
567
544
522
500
477
456
434
411
387
362
335
305
273
231
112
10