EFS

5/14

4

9

7/8/10/11

3/5/6

14

13

12

2

5

1

3

4

R3

R4

R5

C1

DRIVER

ASD

2

U1

U2

R2

R1

THERMAL

FUSE

R6

D1

4

Vcc

GND

OPEN

one of the tracks

DEMONSTRATION BOARD DIAGRAM

Application Conditions

AC mains

Single

230V - 50Hz

Single

120V - 60Hz

Twin series 230V / 50Hz or

single 115V / 50Hz

Lamp Power Range

18 to 70W

18 to 36W

Ambient Temperature Range

-30 to + 85

°C (note 3)

Recommended Components

ASD version

EFS21

Driver version

EFS2A or EFS2B

EFS2B

EFS2A or EFS2B

R1, R2

30k

Ω - 0.125W - 5%

15k

Ω - 0.125W - 5%

R3

130k

Ω - 0.125W - 5%

R4

2.2k

Ω - 0.25W - 5%

3.3k

Ω - 0.25W - 5%

R5

0.39

Ω - 0.25W - 5% (note 4)

R6

0.39k

Ω - 0.25W - 5%

C1

22

µF - 16V - 20%

C2

BYD17K (800V)

Note 3: below -20

°C, it is recommended to limit the lamp power range to 58W.

Note 4: R5(Rsense) should have a 8 A, 10 ms surge capability.

RECOMMENDED COMPONENTS ACCORDING TO APPLICATION CONDITIONS

Pin 2 is the preheat time select pin. To select a short preheat time, drill to cut the Vcc to pin 2 track at the

metallic hole. To select a long preheat time, drill to cut the GND to pin 2 track. The layout must be

configured for either choice to avoid supply short circuit.

When the starter has to be protected against over-temperature, over-current or short circuit, it is

recommended to implement a thermal fuse in series with the starter.

To meet (IEC 926) standards, a capacitor (f.i. 5nF) can be connected between pin 3 and pin 4 of the ASD.

BOARD ASSEMBLY

DRILL and CUT the track

for SHORT preheat -->

for LONG preheat -->

PCB with Pentawatt HV and SO14