FIGURE 4. TYPICAL DC RELAY APPLICATION

R1 = 36k

Ω

R8 = 3.6k

Ω

R2 = 36k

Ω

R9 = 10k

Ω

R3 = 2.7M

Ω

R10 = 18k

Ω

R4 = 36k

Ω

R11 = 3.6k

Ω

R5 = 2.7M

Ω

R12 = 1.0M

Ω

R6 = 36k

Ω

R13 = 1.0M

Ω

R7 = 10k

Ω

R14 = 910k

Ω

R15 = 2.4M

Ω

All Resistors 1/4W, all Capacitors 10V

C1 = 100µF

C8 = .01µF

C2 = 33µF

LDR = SILONEX NSL-19M52 (Typical)

C3 = .01µF

Q1 = 2N3904

C4 = 33µF

Q2 = 2N3906

C5 = .01µF

REGULATOR = MC78L08 (Typical)

C6 = .1µF

RELAY = No typical P/N

C7 = 100µF

PIR = HEIMANN LHi 958 or 878 (Typical)

AMP 1

OUT

AMP 1

(-)IN

AMP 2

(-)IN

AMP 1

(+)IN

AMP 2

OUT

5V REG

OUT

OSC

TIMER

CONTROL

AC

DEAD TIME

SEL

INH

RELAY

OUT

PULSE

MODE

SEL

LED

OUT

C4

R4

C5

R5

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

C2

R2

R6

C6

R1

C1

PIR

SENSOR

R12

R14

LDR

R13

R11

LED

R3

C3

LS6501LP

REGULATOR

RELAY

POWER SUPPLY

R9

R10

R8

R7

Q1

D1

RELAY

COIL

Q2

RAW DC

INPUT

C8

C7

R15

SEE NOTE 2

+

-

+

-

+

-

+

-

S1

SPDT (On - On)

S1 = SPDT (On - Off - On)

S1

6501-070501-6

NOTES: 1. The “Raw DC Voltage” into the Regulator can range between 11V and 25V and generates an 8V DC

Supply Voltage for the LS6501LP.

2. The R10, R9, Q2, R8, R7, Q1 components interface LS6501LP Pin 7 to a Relay Coil returned to a separate

High-Voltage DC Supply.

3. A Relay Coil returned to a maximum of 12.5V can be directly driven by the LS6501LP Pin 7.