M2000C Datasheet, PDF (4/5 Pages) List of Unclassifed Manufacturers – PIR Light Controller for 3-Wire Applications

MOS (PTY) LTD.
Microsystems On Silicon
Member of ELMOS Semiconductor AG
M2000C
PIR Light Controller
for 3-Wire Applications
TCOMP: A temperature dependent resistor network can
be connected to this pin. A voltage range of
VDD*16/128 to VDD*31/128 is converted to a set of
threshold multiplication factors. The voltage on this pin
must decrease as the temperature increases. At 37°C,
the voltage should be between VDD*19/128 and
VDD*20/128. Refer to table 4.
Pin
voltage/
VDD
TCOMP
factor
Pin
voltage/
VDD
<16/128
7
24/128
17/128
6
25/128
18/128
5
26/128
19/128
4
27/128
20/128
4
28/128
21/128
5
29/128
22/128
6
30/128
23/128
7
>31/128
Table 4: Temperature compensation factor
TCOMP
Factor
8
9
10
11
12
13
14
15
TRIAC and RELAY output drivers
The TRIAC output generates a square wave,
synchronous with the mains voltage. To control the
brightness of the light, the square wave is delayed with
regards to the mains cycle zero-crossings. The rising
edge of the square wave triggers the TRIAC for the
positive cycle and the falling edge triggers the TRIAC
for the negative cycle.
The RELAY pin is an active high output and changes
state at the start of the fading cycle.
Controller: Modes of Operation
The operating modes are determined by four digital
inputs. These digital inputs can be connected to VDD or
VSS, some can be left floating.
Pin Name Description
SWIN
Selects the ON-AUTO-OFF mode.
VDD: light permanently ON
VSS1: light permanently OFF
Floating: PIR sensor mode (AUTO)
TOG
VDD: mains toggling enabled.
VSS or floating: mains toggling disabled.
Also refer to 'Conditions for switching the
light ON'.
RETRIG
Re-trigger Mode
VDD or floating: As long as movement is
detected within the on-time, the light will
remain on.
VSS: The light will first switch off, before it
can be switched on again.
DARK
Typically connected to a Light
Dependant Resistor (LDR) or photo
transistor, to prevent the light from
switching on during daylight conditions.
VDD: Enable switching of the light
VSS: Disables switching of the light
Do not leave this input floating
Table 5: Operational parameters
1 _{The toggle mode is not cancelled by setting SWIN input to}
VSS, although the light will be switched off
Operation____________________
Power-up Mode
Whenever the circuit is powered up, the light is
switched on for the selected on-time duration. The
DARK input is ignored on power-up, to allow the user to
verify the installation during daylight conditions.
Trigger condition
The SENS threshold (refer to table 3) is multiplied with
the TCOMP factor (refer to table 4), to obtain a
temperature dependent threshold. When the filtered
PIR signal exceeds this temperature dependent
threshold, a trigger condition occurs.
Conditions for Switching the Light ON
(AUTO mode)
If a trigger condition occurs and the DARK input is high,
the light will be switched on. The light’s brightness will
increase to the selected brightness within the selected
fade time.
The RELAY output is activated at the start of the fading-
on cycle.
The light and the relay will remain on for the duration
set by the ON-TIME input.
If the TOG input is high, the light can also be switched
on by toggling the mains ON-OFF-ON within 3 seconds.
In this mode, the PIR inputs are ignored, the DARK
input will switch the light ON or OFF. This mode is
disabled by disconnecting the mains for a few seconds.
Conditions for Switching the Light
OFF (AUTO mode)
The light is switched off softly after the selected ON-
TIME has elapsed, or if the DARK input senses a low
voltage. The light’s brightness will reduce to zero within
the selected fade time.
The RELAY output is switched off at the start of the
fading-off cycle.
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