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MOS
(PTY) LTD.
M2000C PIR Light Controller for 3-Wire Applications
Applications_________________
Outdoor and indoor motion sensor lights High end lighting switches Automatic bedroom night lights Energy saving
Microsystems On Silicon Member of ELMOS Semiconductor AG
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.
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_____________________________________________
U1
10 VDDA PIRIN VSSA VSW 4 8 ACIN 9
R1
NEUTRAL
C5
IRA1
14 15
C1
R2 R3
VDD
P1
ON-TIME TRIAC
C2
18
Q1 R4
Cx1
R8
VDD 3 SENS
P2
2
RELAY
17
L1
LIVE
P3
1
FADE VDD 19 11 16 12 VSS
VDD
P4
5
BRIGHT
TEST VSS TOG
C3
C4
R7
N1 NTC P5
TCOMP 13
R6
VDD 6 VDD RETRIG DARK
VDD
LDR1
VSS
R5
20
CLOCK
SWIN
7
S1
ON AUTO OFF VSS
M2000C
www.mos.co.za
Rev. 1.0
MOS
(PTY) LTD.
Microsystems On Silicon Member of ELMOS Semiconductor AG
M2000C PIR Light Controller for 3-Wire Applications
Electrical Characteristics_______________________________________
Absolute Maximum Ratings
Parameter Supply Voltage Current into any pin Storage Temperature Symbol VDD Tst Min -0.3 -100 -45 Max 7 100 125 Unit V mA C Remarks One pin at a time
Table 1: Electrical Characteristics (Stresses beyond those listed above may cause permanent damage to the device. Exposure to absolute maximum ratings may affect the device reliability. ESD protection: all pins will be able to withstand a discharge of a 100pF capacitor charged to 1.6kV through a 1500 series resistor. Test method: MIL-STD-883D method 3015).
Operating Conditions (T=25C, VDD=5V, unless stated otherwise)
Parameter Temperature Operating temperature range Rectifier / Regulator Supply voltage Supply current Shunt regulator current Symbol Min -25 VDD IDD IACIN 4.2 Typ 25 5 Max 70 5.5 500 20 20 Unit C V A mA %VDD %VDD 140 140 1 6 A A A mA Input to VDD Input to VSS Input to VSS or VDD Input to VSS or VDD VDD=5VOutputs unloaded VDD=6V Remarks
Digital Inputs, Schmitt triggers (TEST, TOG, RETRIG, DARK, SWIN) Input low voltage VIL Input high voltage Pull down current on TEST,TOG Pull up current on RETRIG Leakage current on DARK Pull up/ pull down scanning current on SWIN VSW Digital Input (window comparator) Input low voltage Input high voltage Digital Outputs (RELAY, TRIAC) Output low voltage Output high voltage Analog Inputs Input voltage range Input leakage current (ON-TIME, SENS, FADE, BRIGHT, TCOMP) PIRIN input resistance to VSS PIRIN input AC voltage Oscillator and Filter LPF cutoff frequency HPF cutoff frequency Internal clock frequency
Table 2: Operating Conditions
VIH
80
VSWL VSWH VOL VOH 90 0 -1 60 VDD-1
1
V V
10
%VDD %VDD
ISOURCE=5mA ISINK=2mA
VDD 1
V A k
5 7 0.5 25.6
mV Hz Hz kHz
Peak-to-Peak
R5 as per table 7
www.mos.co.za
Page 2 of 5
Rev. 1.0
MOS
(PTY) LTD.
Microsystems On Silicon Member of ELMOS Semiconductor AG
M2000C PIR Light Controller for 3-Wire Applications
Detailed Description___________________________________________
SWIN DARK VS W V DDA V DD
D riv e r P I RIN In put A m plifier A /D C onv erter Ban d P ass F ilter TRI A C D riv e r Relay D riv e r
TRI A C RE LA Y
C ontroller M ains Rectifier A C IN V olta ge Reg ulato r O scilator
P aram eters
SENS BRI G H T
A DC
FA DE O N -TI M E TC O M P
CLOCK
Mains Rectifier
The M2000C contains an on chip half wave rectifier. The ACIN input is connected to the mains voltage through an external voltage dropper resistor.
VS S
Parameter Settings
The M2000C provides for five inputs, which are used to define the operational parameters. The voltage applied on these inputs are converted to 4 (3) bit digital values. A value of 16 (8) corresponds to a voltage of >VDD/4, a value of 0 to VDD/4/16 (8). SENS: Sets the sensitivity threshold required to generate a trigger condition. Eight different threshold values are possible. Refer to table 3. The threshold value internally recalculated with the temperature compensation factor. BRIGHT: Sets the maximum brightness of the light. The brightness levels are divided into 15 equal steps. One steps corresponds to 90*(1- 1/16) degrees phase angle. FADE: Sets the time it takes to switch the light on or off (soft dimming). Refer to table 3. ON-TIME: Sets the time the light remains on. Refer to table 3. Pin voltage/ VDD 7/32 6/32 5/32 4/32 3/32 2/32 1/32 0/32 On time (s) Fade time (s) 3.7 3.3 2.8 2.1 1.2 0.9 0.3 0 Rev. 1.0 SENS threshold 128 64 32 16 8 4 2 1
Voltage Regulator
A shunt regulator between VDD and VSS limits the supply voltage to 5V. An external capacitor has to be connected between VDD and VSS.
Oscillator
The IC contains an on chip oscillator. The frequency is set to about 52 kHz for 50Hz systems and 64kHz for 60Hz systems by selecting the correct resistor between CLOCK and VDD. All timing signals and cutoff frequencies of the digital filters are derived from this frequency.
Input amplifier and A/D Converter
The PIRIN input has an internal pull-down resistor and DC decoupling circuitry. The signal voltage on the PIR input is converted to a 14 bit digital value.
Band-Pass Filter
A2 order digital Butterworth band-pass filter eliminates unwanted frequency components above and below the band of interest (0.4Hz .. 7Hz).
nd
Threshold Comparator
The output signal from the band pass filter is digitally rectified and its peak value compared against a threshold value calculated from the voltages on the SENS and TCOMP inputs. Whenever the PIR signal exceeds the threshold, the load is switched on. www.mos.co.za Page 3 of 5
Table 3: On-time and Fade-time
RTRIG
VS SA
TE ST
TOG
1280 640 320 160 80 40 20 10
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 37C, the voltage should be between VDD*19/128 and VDD*20/128. Refer to table 4. Pin voltage/ VDD <16/128 17/128 18/128 19/128 20/128 21/128 22/128 23/128 TCOMP factor 7 6 5 4 4 5 6 7 Pin voltage/ VDD 24/128 25/128 26/128 27/128 28/128 29/128 30/128 >31/128 TCOMP Factor 8 9 10 11 12 13 14 15
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 fadingon 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.
Table 4: Temperature compensation factor
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 SWIN Description Selects the ON-AUTO-OFF mode. VDD: light permanently ON VSS1: light permanently OFF Floating: PIR sensor mode (AUTO) VDD: mains toggling enabled. VSS or floating: mains toggling disabled. Also refer to 'Conditions for switching the light ON'. 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. 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
Conditions for Switching the Light OFF (AUTO mode)
The light is switched off softly after the selected ONTIME 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.
TOG
RETRIG
DARK
Table 5: Operational parameters 1 The toggle mode is not cancelled by setting SWIN input to VSS, although the light will be switched off
www.mos.co.za
Page 4 of 5
Rev. 1.0
MOS
(PTY) LTD.
Microsystems On Silicon Member of ELMOS Semiconductor AG
M2000C PIR Light Controller for 3-Wire Applications
Device Pin Out________________________________________________
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name BRIGHT FADE SENS ON-TIME TCOMP DARK SWIN VSW ACIN VDDA TEST TOG RETRIG PIRIN VSSA VSS RELAY TRIAC VDD CLOCK Description Set maximum brightness of light Set fading time of light Set sensitivity threshold for switching light on Set light on time Temperature compensation input Dark mode input, connected to LDR/Photodiode ON-AUTO-OFF select input Input voltage sensor Mains power in (rectifier) Analog supply Reserved test mode, connect to VSS Selects Toggle Mode Selects Re-trigger mode PIR sensor input Analog ground Digital ground Relay Output, push-pull TRIAC gate signal, push-pull Digital supply Set oscillator frequency
Table 6: Device Pin Out
Component Values____________________________________________
Designator R1 R2, R3 R4 R5 R6 R7 R8 P1, P2, P3, P4 C1 C2 C4 C3,C5 IRA1 Q1 L1 CX1 N1 LDR1* P5* Description 88k (230V~) 1/2W 44k (110V~) 1/2W 1M 10k 470k 180k 18k 33k 47k Trim pot 10nF 100nF 470F, 16V 470nF LHI 878, Perkin Elmer BT136 TRIAC 600V, 4A Inductor 100..1500H 100..220nF, class X (dependent on local EMC regulations) NTC 47k Light Dependant Resistor Trim pot
Table 7: Component Values for Application Circuit
Contact Information___________
Microsystems On Silicon (PTY) Ltd. Pretoria, South Africa Tel: +27 (12) 348 8367 Fax: +27 (12) 348 1790 Email: sales@mos.co.za Visit our website for the latest information
Ordering Information__________
M2000C-DIP20 (Dual-in-line plastic) M2000C-SO20-300 (Surface mount, 300 mills) M2000C-DIE (Unpackaged devices) Other packages are available on request.
www.mos.co.za
Page 5 of 5
Rev. 1.0

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