EFS Datasheet, PDF (5/14 Pages) STMicroelectronics – STARLIGHT-KIT

DEMONSTRATION BOARD DIAGRAM
EFS
THERMAL
FUSE
R1 R2
DRIVER
R5
D1
R4
R3
4
14
13
4 _{U2 12}
9
2
7/8/10/11
3/5/6
Vcc
GND
OPEN
one of the tracks
R6
ASD
1³
5 _U1
2
4
C1
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
PCB with Pentawatt HV and SO14
DRILL and CUT the track
for SHORT preheat -->
for LONG preheat -->
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.
RECOMMENDED COMPONENTS ACCORDING TO APPLICATION CONDITIONS
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
30kΩ - 0.125W - 5%
15kΩ - 0.125W - 5%
R3
130kΩ - 0.125W - 5%
R4
2.2kΩ - 0.25W - 5%
3.3kΩ - 0.25W - 5%
R5
0.39Ω - 0.25W - 5% (note 4)
R6
0.39kΩ - 0.25W - 5%
C1
22µF - 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.
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