Document
TIGER ELECTRONIC CO.,LTD
DB3/DB4
Silicon Bidirectional Diacs VOLTAGE RANGE: 28-45 V
DO-35
Features
The three layer,two termnal,axial lead,hermetically 1111sealed diacs are designed specifically for triggering 1111thyristors.They demonstrate low breakover current at 1111breakover voltage as they withstand peak pulse 1111current,The breakover symmetry is within three 1111volts(DB3,DB4). These diacs are intended for use in CCCthyrisitors phase control,circuits for lamp dimming, FFFI universal motor speed control,and heat control.
ABSOLUTE RATINGS
Parameters
Symbols
Dimensions in inches and (millimeters)
DB3,DB4
UNITS
Power dissipation on printed TA=50oC circuit (L=10mm)
Pc
Repetitive peak on-state current
tp=20 S f=120Hz
ITRM
Operating junction temperature
TJ
Storage temperature
TSTG
ELECTRICAL CHARACTERISTICS
150.0
2.0 -40--- +125 -40--- +125
Parameters
Test Conditions
Breakover voltage (NOTE 1)
C=22nf(NOTE 2) VBO See FIG.1
Breakover voltage symmetry Dynamic breakover voltage (NOTE 1)
I+VBO II-VBOI
I± VI
C=22nf(NOTE 2) See FIG.1
I=(IBO to IF=10mA) See FIG.1
Output voltage (NOTE 1)
Vo See FIG.2
Breakover current (NOTE 1) Rise time (NOTE 1)
Leakage current (NOTE 1)
IBO C=22nf(NOTE 2)
tr See FIG.3
IR
VR=0.5 VBO See FIG.1
NOTE: 1.Electrical characteristics applicable in both forw ard and reverse dirctions.
2.Connected in parallel w ith the devices
Min Typ Max Max
Min
Min Max Typ Max
DB3 DB4 28 35 32 40 36 45
±3.0
5.0
5.0 100.0
1.5 10.0
mW
A oC oC
UNITS
V
V V V
A S A
DB3/DB4
Silicon Bidirectional Diacs
Ratings and Characteristic Curves
FIG.1--VOLTAGE-CURRENT CHARACTERISTIC CURVE
FIG.2--TEST CIRCUIT FOR OUTPUT VOLTAGE
+IF 10mA
IBO IB -V
0.5VBO
+V
220V 60Hz
10K 500KD.U.T
0.1µ F
Vo R=20
VBO -IF
FIG.3-- TEST CIRCUIT SEE FIG.2 ADJUST R FOR IP=0.5A
90%
IP
10%
tr
FIG.4--POWER DISSIPATION VERSUS AMBIENT TEMPERATURE (MAXIMUM VALUES)
P(mW) 160
140 120 100 80
60 40 20
Tamb( ) 0
0 10 20 30 40 50 60 70 80 90 100 110 120 130
FIG.5--RELATIVE VARIATION OF VBO VERSUS JUNCTION TEMPERATURE(TYPICAL VALUES)
VBO(TJ) 1.08 VBO(TJ=25 )
1.06 1.04
TJ( )
1.02
1.00 25 50 75
100 125
FIG.6--PEAK PULSEE CURRENT VERENT VERSUS PULSE DURATION(MAXIMUM VALUES)
ITRM(A) 2 1
f=100Hz TJ initial=25
0.1
tp(µ s)
0.01 10
100 1000 10000
.