LS6501LP-SW View Datasheet(PDF) - LSI Corporation
Part Name
Description
MFG CO.
'LS6501LP-SW' PDF : 8 Pages View PDF
INHIBIT
DC REGULATOR
The Output Duration Timer can be inhibited from trig- The LS6501LP includes a Regulator which provides a
gering by the voltage level at the INHIBIT input. When this nominal +5V to the Differential Amplifier and Window
voltage level exceeds the Inhibit Threshold, the Timer will Comparator and is available as an output to supply the
be prevented from triggering if it is OFF. If the Timer is PIR Sensor.
ON, the INHIBIT input is blocked from affecting the Timer.
There is approximately 10% hysteresis between the In- TRIAC/RELAY OUTPUT
hibit and Enable thresholds at the INHIBIT input. The LED This open drain output turns ON when the Output Dura-
output is not affected by the INHIBIT input. An adjustable tion Timer is triggered. The output drives a Triac when
Ambient Light Level Inhibit can be implemented by con- the OSCILLATOR input is tied to ground and 50/60Hz is
necting a Light Determining Resistor (LDR) network to the applied to the AC input (See Figure 3). The output drives
INHIBIT input (See Figures 3 and 4).
a Relay when the AC input is tied to ground and an RC
network is connected to the OSCILLATOR input (See
DEAD TIME
Figure 4).
False turn-ons are prevented from occurring by es-
tablishing a Dead Time between the end of the timeout of TRIAC DRIVE (See Figure 3)
the Output Duration Timer and the retriggering of that With the Output Duration Timer ON and a 2.7V P-P
Timer. The state of the DEAD TIME SELECT input de- 60Hz signal applied to the AC input, the output produces
termines the Dead Time duration (See Table 2).
a negative-going pulse in each half-cycle delayed a
OSCILLATOR
For battery operation, an external RC is connected to the
d OSCILLATOR input to produce a 50Hz or 60Hz clock. A
30Hz clock can be used to extend timing durations (See
e Tables 1 and 2).
DC POWER SUPPLY
u VDD - Vss is 8V ± 1V. Typical quiescent current is 250µA
(TRIAC/RELAY, LED and REGULATOR outputs not loaded).
nominal 1.2ms from the zero crossing. There is no more
than 150µs difference between the zero-crossing delay
of each pulse.
RELAY DRIVE (See Figure 4)
The output can sink current continously with the Output
Duration Timer ON and the OSCILLATOR input active.
This output can sink current from a relay coil returned to
a positive voltage (VDD to 12.5V maximum).
tin TABLE 1
OUTPUT DURATION TIMER AS A FUNCTION OF TIMER CONTROL INPUT VOLTAGE
(f = Frequency at AC input or OSCILLATOR input)
n INPUT VOLTAGE
o 0
1/16 VDD
c 2/16 VDD
3/16 VDD
is 4/16 VDD
5/16 VDD
6/16 VDD
D 7/16 VDD
f = 30Hz
30
60
90
120
4
6
8
10
f = 50Hz
18
36
54
72
2.4
3.6
4.8
6
f = 60Hz
15
30
45
60
2
3
4
5
UNIT
sec
sec
sec
sec
min
min
min
min
8/16 VDD
12
7.2
6
min
9/16 VDD
14
8.4
7
min
10/16 VDD
16
9.6
8
min
11/16 VDD
18
10.8
9
min
12/16 VDD
20
12
10
min
13/16 VDD
24
14.4
12
min
14/16 VDD
28
16.8
14
min
15/16 VDD
30
18
15
min
TABLE 2
DEAD TIME DURATION AS A FUNCTION OF THE STATE OF DEAD TIME SELECT INPUT
(f = Frequency at AC input or OSCILLATOR input)
INPUT STATE
0
OPEN
1
f = 30Hz
2
8
16
f = 50Hz
1.2
4.8
9.6
f = 60Hz
1
4
8
UNIT
sec
sec
sec
6501LP-012703-2
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