MOS (PTY) LTD.
Microsystems On Silicon
Member of ELMOS Semiconductor AG
M2000C
PIR Light Controller
for 3-Wire Applications
www.mos.co.za
Rev. 1.0
General Description___________
The M2000C integrated circuit combines all required
functions for a single chip Passive Infra Red (PIR) light
controller.
It is designed for load switching with a TRIAC or a relay
in 3 wire systems.
A conventional PIR sensor connects directly to the PIR
input. The pull-down resistor and DC decoupling
circuitry are integrated on chip. The PIR signal is
converted to a 15 bit digital value.
External potentiometers or resistors are used to set the
operating
parameters
for
sensitivity,
on-time,
brightness, fade, daylight sensor and environment
temperature correction. The corresponding voltage
levels are converted to digital values with a 4 bit
resolution
All
signal
processing
is
performed
digitally.
Applications_________________
♦ Outdoor and indoor motion sensor lights
♦ High end lighting switches
♦ Automatic bedroom night lights
♦ Energy saving
Features_____________________
♦ Digital signal processing
♦ On chip rectifier and supply regulator
♦ Low power consumption
♦ Temperature compensation input
♦ Adjustable soft on/off switching (fading)
♦ Dimmer function
♦ Inductive load switching
♦ Capacitive load on/off switching
♦ Four quadrant TRIAC driver
♦ Suitable for 115V/60Hz and 230V/50Hz applications
♦ Low TRIAC switching noise
Application Circuit_____________________________________________
Q1
R1
C2
C1
C3
C4
LIVE
NEUTRAL
R5
S1
LDR1
L1
VSS
P1
P2
P3
P4
P5
R4
VDD
PIRIN
14
VSSA
15
VSS
16
ON-TIME
4
SENS
3
BRIGHT
1
TRIAC
18
ACIN
9
VDDA
10
DARK
6
TCOMP
5
TOG
12
RETRIG
13
RELAY
17
VDD
19
SWIN
7
CLOCK
20
FADE
2
VSW
8
TEST
11
U1
M2000C
IRA1
C5
R3
R6
VSS
R8
VDD
R2
VDD
VDD
VDD
VSS
ON
AUTO
OFF
Cx1
R7
VDD
NTC
N1
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