MLX90804 Datasheet, PDF (9/12 Pages) List of Unclassifed Manufacturers – Speed regulator for universal motors

MLX90804
Speed regulator for universal motors
the maximum angle with the triac on (fired). This
happens when the triac is fired with minimum delay
from the zero cross. MIN corresponds to the
minimum time the triac is fired. This happens when
the triac is fired with maximum delay from the zero
cross.
If the IGN < MAX ,then IGN = MAX, thus firing with
max angle. If MAX < IGN, then firing is done with
IGN angle. The IGN value is compared with the
value of a down counter, which is clocked by DCLK
= 100kHz and is cleared at the beginning of every
half period of the AC line. When this counter value
gets equal to IGN a firing circuit produces an ignition
pulse GATE with a duration selected with option
DUTS[1:0].
After each firing pulse the ignition detector is
activated. This will check whether the triac is fired
correctly and thus no additional firing pulses are
required. If there is no current flowing in the triac
additional pulses will be generated.
MIN
IGN
MAX
MAINS
MAINS*2
GATE
DUTS1
0
0
1
1
DUTS0
0
1
0
1
Duration in us
320
80
40
20
Options
The following table lists all mask options of the
90804 chip:
Name
MULT[7:0]
FPB
SFT[1:0]
PX[3:1]
SSE[1:0]
SPE[1:0]
LD[9:0]
DWR[4:0]
UPR[4:0]
DUTS[1:0]
MULT9
MIN[9:0]
MAX[9:0]
SLIM[9:0]
SLIMA[4:0]
Description
multiplication coefficient of
Fspd
Gate of frequency meter
startup time
Proportional coefficient Kp
Integral coefficient Ki
Start speed
Preload of Integrator
SETP integrator down
SETP integrator up
duration of firing pulse
Enable retriggering
min allowed firing angle
max allowed firing angle
minimum speed limitation
maximum speed limitation
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 Speed setting input
2
SPD Input Speed measurement
3
TEST Input Test pin
4
SYN Input Zero cross input
5
TRG Output Triac driver output
6
VSS Supply Ground
7
VDD1 Supply Supply, high level
8
VDD Output Reference voltage
M_ML_LX_X9₉0₀2₈xx₀₄Na_Sm_pe_eeo_df S_ree_gn_us_lo_ar_{tor for universal motors} Re_Pv_aY_g.X_{e 9}
22/Aug/98 _{Rev 1.0 3}P_0/a_Jg_ue_n9_/00