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PDF BL5980 Data sheet ( Hoja de datos )
| Número de pieza | BL5980 | |
| Descripción | Low Voltage Photoelectric Smoke Detector ASIC | |
| Fabricantes | BELLING | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BL5980 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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BL5980
Low Voltage Photoelectric Smoke Detector ASIC with
Interconnect and Timer Mode
1.0. INTRODUCTION
1.1 Features
Low Quiescent Current Consumption
Two AA Battery Operation
Internal Power On Reset
Local Alarm Memory
Internal Low Battery detector
Interconnect up to 40 Detectors
9 minute Timer for Sensitivity Control
Temporal or Continuous Horn Pattern
Low Battery and Chamber Test
Internal Infrared Emitter Diode (IRED) driver
Adjustable IRED Drive current
Adjustable Hush Sensitivity
Available in SOP16
1.2 Pin Diagrams
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1 page  
BL5980
Input Voltage VIL1 10
Low
VIL2 12
IO Hysteresis
Input Pull Down
Current
Output Voltage
Low
Output High
Voltage
VHYST1
IPD1
IPDIO1
IPDIO2
VOL1
VOL2
VOL3
VOH1
IIOH1
12
4,5
12
12
13,14
8
9
13,14
12
IIODMP
12
3
20
8.5
-4
5
IIRED50
2
45
Output Current IIRED100
2
90
IIRED150
2
135
IIRED200
2
180
IRED Current
Temperature
Coefficient
TCIRED
Low Battery
Alarm Voltage
VLB1
3 2.05
VLB2
3 2.15
VLB3
3 2.25
VLB4
3 2.35
VLB5
3 2.45
VLB6
3 2.55
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2.7 V FEED, VBST = 9V
800
mV
No local alarm,IO as an
input
150 mV
10 30 µA VIN = VDD
80 µA VIN = VDD
140 µA VIN = 15V
500 mV
300 mV
300 mV
V IOL = 16 mA, VBST = 9V
-5
mA
Alarm, VIO = 3V or VIO =
0V, VBST = 9V
15
mA
At Conclusion of Local
Alarm or Test, VIO=1V
IRED on, VIRED = 1V,
50
55
mA
VBST = 5V, IRCAP = 5V,
(50 mA option selected;
TA = 27°C)
IRED on, VIRED = 1V,
100
110
mA
VBST = 5V, IRCAP = 5V,
(100 mA option selected;
TA = 27°C)
IRED on, VIRED = 1V,
150
165
mA
VBST = 5V, IRCAP = 5V,
(150 mA option selected;
TA = 27°C)
IRED on, VIRED = 1V,
200
220
mA
VBST = 5V, IRCAP = 5V,
(200 mA option selected;
TA = 27°C
0.5
%/℃
VBST = 5V, IRCAP =
5V；Note 4
2.1 2.15
2.2 2.25
2.3 2.35
2.4 2.45
2.5 2.55
2.6 2.65
V
Falling Edge; 2.1V
nominal selected
V
Falling Edge; 2.2V
nominal selected
V
Falling Edge; 2.3V
nominal selected
V
Falling Edge; 2.4V
nominal selected
V
Falling Edge; 2.5V
nominal selected
V
Falling Edge; 2.6V
nominal selected
Page5
V1.1
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BL5980
the TEST input is driven high, the RLED will turn on. If the TEST input is held for more than 0.5
second, the unit will enter the Push-to-test operation described in Section 4.4 “Push-to-Test
Operation (PTT)”. After the TEST input is driven low, the unit enters in Low Battery Hush mode,
and the 10 ms horn pulse is silenced for 8 hours. The activation of the test button will also
initiate the 9 minute Reduced Sensitivity mode described in Section 4.6 “Reduced Sensitivity
Mode”. At the end of the 8 hours, the audible indication will resume if the low battery condition
still exists.
4.4 Push-to-Test Operation (PTT)
If the TEST input pin is activated (VIH), the smoke detection rate increases to once every 250
ms after one internal clock cycle. In Push-to-Test, the photo amplifier High Gain mode is
selected, and background reflections are used to simulate a smoke condition. After the
required three consecutive detections, the device will go into a Local Alarm condition. When
the TEST input is driven low (VIL), the photo amplifier Normal Gain is selected, after one clock
cycle. The detection rate continues at once every 250 ms until three consecutive No Smoke
conditions are detected. At this point, the device returns to standby timing. In addition, after the
TEST input goes low, the device enters the HUSH mode (see Section 4.6 “Reduced Sensitivity
Mode”).
4.5 Interconnect Operation (I/O)
The bidirectional IO pin allows the interconnection of multiple detectors. In a Local Alarm
condition, this pin is driven high (High Boost) immediately through a constant current source.
Shorting this output to ground will not cause excessive current. The IO is ignored as input
during a Local Alarm.
The IO pin also has an NMOS discharge device that is active for 1.3 seconds after the
conclusion of any type of Local Alarm. This device helps to quickly discharge any capacitance
associated with the interconnect line.
If a remote, active high signal is detected, the device goes into Remote Alarm and the horn will
be active. RLED will be off, indicating a Remote Alarm condition. Internal protection circuitry
allows the signaling unit to have a higher supply voltage than the signaled unit, without
excessive current draw.
The interconnect input has a 336 ms nominal digital filter. This allows the interconnection to
other types of alarms (carbon monoxide, for example) that may have a pulsed interconnect
signal.
4.6 Reduced Sensitivity Mode
A Reduced Sensitivity or Hush mode is initiated by activating the TEST input (VIH). If the TEST
input is activated during a Local Alarm, the unit is immediately reset out of the alarm condition,
and the horn is silenced. When the TEST input is deactivated (VIL), the device enters into a
9-minute nominal Hush mode. During this period, the HUSH integration limit is selected. The
hush gain is user programmable. In Reduced Sensitivity mode, the RLED flashes for 10 ms
every 10 seconds to indicate that the mode is active. As an option, the Hush mode will be
cancelled if any of the following conditions exist:
•Reduced sensitivity threshold is exceeded (high smoke level)
•An interconnect alarm occurs
•TEST input is activated again.
4.7 Local Alarm Memory
An Alarm Memory feature allows easy identification of any unit that had previously been in a
Local Alarm condition. If a detector has entered a Local Alarm, when it exits that Local Alarm,
the Alarm Memory latch is set. Initially the GLED can be used to visually identify any unit that
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Page11
V1.1
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BL5980.PDF ] | |
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