THE FLUORACTOR® Y1112
FLUORESCENT LAMP STARTER SWITCH
1
JUNE 1984 - REVISED SEPTEMBER 2002
Specifications are subject to change without notice.
●V(BR) 1200 to 1500 V
●IH > 175 mA
●IGT < 2 mA
description
This product is intended for use as a T8/T12
fluorescent tube starter switch on 200-240 V a.c.
supplies with tube sizes up to 5ft with leading
and lagging ballast circuits.
K
A
G
TO-220 PACKAGE
(TOP VIEW)
Pin 2 is in electrical contact with the mounting base.
MDC1ACA
1
2
3
absolute maximum ratings at 25°C case temperature (unless otherwise noted)
RATING SYMBOL VALUE UNIT
Crest working off-state voltage (Full wave rectified 50 Hz a.c.) VDWM 375 V
Peak reverse gate voltage VRGM 6V
On-state current — continuous
— repetitive peak
— non-repetitive peak
IT
ITRM
ITSM
1.5
2
10
A
Peak gate current IGRM 0.5 A
Average gate power PG(av) 0.3 W
Operating case temperature range TC-5 to +85 °C
Storage temperature range Tstg -10 to +110 °C
Lead temperature during soldering 1.6 mm from the case for 10 seconds Tlead 230 °C
electrical characteristics at 25°C case temperature (unless otherwise noted )
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
IDOff-state current VD = VDWM Tj = 65°C 1 mA
VTOn-state voltage IT= 2 A 3.1 V
V(BR) Clamping voltage IBR = 5 mA tp< 200 µs, 2% duty cycle 1200 1500 V
IHHolding current See application circuit 175 mA
IGTM
Peak gate
trigger current VAA = 10 V RL= 10 Ω2mA
VGTM
Peak gate
trigger voltage VAA = 10 V RL= 10 Ω3V
thermal characteristics
PARAMETER MIN TYP MAX UNIT
RθJA Junction to free air thermal resistance 62.5 °C/W
RθJC Junction to case thermal resistance 3.5 °C/W
THE FLUORACTOR® Y1112
FLUORESCENT LAMP STARTER SWITCH
2
JUNE 1984 - REVISED SEPTEMBER 2002
Specifications are subject to change without notice.
applications data
The conventional method of starting fluorescent tubes employs the use of an electromechanical canister. This
consists of a bimetallic strip which opens as it cools and in conjunction with the ballast inductor, provides the
tube striking voltage. However, the random nature of the pulsing results in repeated striking attempts and
degradation of both the tube and starter. The tube degradation is illustrated by its progressively blackening
ends and ultimately required tube replacement.
The Y1112, “Fluoractor®”, has been specifically introduced for use in electronic starters. This unique device
offers the lighting industry an opportunity to develop electronic starters small enough to be retrofit
replacements for the established electromechanical canisters. Its double thyristor structure with integrated
zener clamp diode and current mirror provides the technology for a starter with enhanced features such as
controlled flicker free start up, automatic tube shutdown at end of tube life and reduced degradation of tube
ends leading to extended life. The increased functionality, lifetime and reliability of these starters has led in
some cases to them being embodied in the ballast itself, a development not feasible with the old
electromechanical canisters.
NOTE 1: These rectifiers need to be voltage selected for VR ≥ V(BR)max + 150 V
Figure 1. Two terminal starter circuit
FLSCCT1
Y1112
150 k
Ω
R2
68 k
Ω
R3
6.8 k
Ω
D5
D6
D7
D1 to 4 (see Note A)
4 x 1N4007
D5 to 7
3 x 1N4001
