BL59A66 반도체 회로 부품 판매점
Smoke Detector
|
|
 BELLING |
BL59A66 datasheet
1. Introduction:
The BL59A66 is a low-current BiCMOS circuit providing all of the features for a photoelectric
type smoke detector. BL59A66 can be used in conjunction with an infrared photoelectric chamber to
sense scattered light from smoke particles. Special features are incorporated in the design to facilitate
calibration and testing of the finished detector.
2.1 Applied Area:
Photoelectric Type Smoke Detector System。
2.2 Features:
2.2.1 6 V to 12 V Operating Voltage Range
2.2.2 Internal Timer & Control for Reduced Sensitivity
2.2.3 Supply Voltage current：0~10uA
2.2.4 Operating Temperature Range：－25～75℃
2.2.5 Power-ON Reset
2.2.6 ESD and Latch-up Protection Circuitry on All Pins
2.2.7 Piezoelectric Horn Driver
2.2.8 Interconnect Up to 50 Detectors
2.2.9 Continuous Modulated Tone Output For a Local or Remote Alarm Condition
2.3 FUNCTIONAL BLOCK DIAGRAM
2.4 Pin Description
2.5 Pin function
Pin No. Pin symbol
1 ,2 C1 , C2
3 DETECT
4 STROBE
5 ,14
Vdd , VSS
Input/O
utput
Input
Output
Function Description
Exterior capacitor
connected to the pins
Input to the photo
amplifier
Regulated voltage
Output
Power/Gnd
A capacitor connected to the pins determines the
gain of the photo amplifier.
This pin connects the cathode of the photo diode.
The photo diode is operated at zero bias.
The pin is the Regulated voltage Output. The value
is Vdd-5V.
Power supply
6 IRED
Output
7 I/O
8 ,9 BRASS,
Output
SILVER
10 FEEDBACK Inuput
11 LED
Output
12 OSC
13 R1
15 LS SET
Input
Intput
16 TEST
Input
3. Circuit characteristic:
Signal output
Piezoelectric
Transducer Output
Piezoelectric
Transducer Input
Signal output
OSC Input
Exterior capacitor
and resistor
connected to the pins
Low sensitive set
Test Input
This pin is a output, which provides a pulsed base
current for the external npn transistor, which
drives the IR emitter.
A connection at this pin allows multiple smoke
detectors (less than 50) to be interconnected.
These TWO pins are used in conjunction with a
piezoelectric transducer.
The pin is used in conjunction with a piezoelectric
transducer feedback electrode.
This open-drain NMOS output is used to directly
drive a visible LED. The LED also indicates
detector status as follows (with component values
as in the typical application, all times nominal)
The pin connects with exterior capacitor and
resistor, sets the internal clock low time.
The pin connects with exterior capacitor and
resistor, sets the internal IRED output pulse
period.
This input pin serves two purposes in normal
operation. This reference is established by a
resistive divider between VDD and STROBE. This
allows the detector to have a different sensitivity
set point during the timer mode.
This pin has an internal pull-down device and is
used to manually invoke two test modes and a
Timer Mode.
3.1 The gain is determined by exterior capacitor C1 and C2. A capacitor connected to C2 determines the gain of
the photo amplifier during standby. A typical value for this low-gain mode is 4700 pF but should be selected
based on a specific photo chamber and the desired level of sensitivity to smoke. AV= 1+(C2/10) where C2 is in
pF. This gain increases by a nominal 10% after a local alarm is detected (three consecutive detections).
3.2 I/O pin allows multiple smoke detectors to be interconnected. If a local smoke condition occurs, this pin is
driven high. As an input, this pin is sampled nominally every 1.35 seconds during standby. Any local alarm
condition causes I/O to be ignored as an input.
3.3 LED pin is a output pin, which is used to directly drive a visible LED. The load for the low-battery test is
applied to this output. The low-battery test does not occur coincident with any other test or alarm signal. The
LED also indicates detector status as follows (with component values as in the typical application, all times
nominal):
Standby - Pulses every 43 seconds.
Local Smoke - Pulses every 0.67 second.
Remote Alarm - No pulses.
Test Mode - Pulses every 0.67 second.
Timer Mode - Pulses every 10 seconds.
4. Circuit characteristic parameter:
|
PDF 파일 내의 페이지 : 총 4 페이지
제조업체: BELLING
( belling )
BL59A66 detector
데이터시트 다운로드 :
[ BL59A66.PDF ]
[ BL59A66 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
