DO-35
DB3TG
Datasheet
Diac in DO-35 with tight V
BO
Features
• V
BO
: 32 V
• Low breakover current: 15 µA max.
• Breakover voltage range: 30 to 34 V
Applications
• Triggering device for Triac or SCR based motor / light dimmer
• 32 V trigger device for oscillator circuit
• Start up triggering in lighting ballast for CFL, TL or LED lamps
Description
Functioning as a trigger diode with a fixed voltage reference, the DB3TG can be used in conjunction with Triacs for simplified gate control circuits or as a starting element in fluorescent lamp ballasts.
Product status link
DB3TG
Product summary
Part number
DB3TG
V
BO
30 - 34 V
DS2137 - Rev 3 - May 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
1
DB3TG
Characteristics
Characteristics
Table 1. Absolute maximum ratings (limiting values), T j
= 25 °C unless otherwise specified
Symbol
I
TRM
T stg
T j
Parameter
Repetitive peak on-state current, t p
= 20 µs, F = 120 Hz
Storage junction temperature range
Operating junction temperature range
Value
2.00
-40 to +125
-40 to +125
Unit
A
°C
°C
Symbol
V
BO
Table 2. Electrical characteristics (T j
= 25 °C unless otherwise specified)
Parameter Test conditions
Breakover voltage (1)
I V
BO1
- V
BO2
I Breakover voltage symmetry
Δ V Dynamic breakover voltage
(1)
V
O
I
BO t r
I
R
I
P
Output voltage
Rise time (1)
Peak current
(1)
(1)
Breakover current
Leakage current (1)
(1)
1. Applicable to both forward and reverse directions.
2. Connected in parallel to the device
C = 10 nF (2)
C = 10 nF (2)
V
BO
and V
F
at 10 mA
See
Figure 2. Test circuit , (R = 20 Ω)
C = 10 nF (2)
See
Figure 3. Rise time measurement
V
R
= 0.5 x V
BO
max
See
Figure 2. Test circuit
Min.
Typ.
Max.
Max.
Min.
Min.
Value Unit
30
32
34
V
2 V
9
5
V
V
Max.
Max.
Max.
Min.
0.30
15
2
10
µA
µs
µA
A
DS2137 - Rev 3 page 2/9
DS2137 - Rev 3
V
Figure 1. Voltage - current characteristic curve.
10 mA
+IF
IBO
IB
VF
0,5 VBO
Δ
V
VBO
+ V
- IF
Figure 2. Test circuit
10 k Ω 500 k Ω D.U.T
Rs = 0
220 V
50 Hz
C = 0.1 µF
Vo
R = 20 Ω
IP
T410
DB3TG
Characteristics page 3/9
Figure 3. Rise time measurement l p
90 %
10 % t r
DB3TG
Characteristics
DS2137 - Rev 3 page 4/9
DB3TG
Characteristics (curves)
1.1
Characteristics (curves)
Figure 4. Relative variation of V
BO
versus junction temperature (typical values)
1,05
V
BO
[T j
] / V
BO
[T j
=25 °C]
1,00
0,95
0,90
0,85
0,80
-40 -20 0 20 40 60 80 100
T j
(°C)
120
Figure 5. Peak on-state current versus Triac gate current pulse duration t p
10.0
ITRM(A) f =120 Hz
Tj initial = 25°C
1.0
0.1
1 10 tp(µs)
100
Note:
Figure 6. Triac gate current pulse duration t p
(to have I
P
> 50 mA) versus Rs and C values (typical values)
50E-6 tp (s)
68 Ω
40E-6
30E-6
33 Ω
47 Ω
20E-6
22 Ω
10E-6
10 Ω
00E+0
10E-9 100E-9
0 Ω
C (F)
1E-6 according to Figure 2. Test circuit
DS2137 - Rev 3 page 5/9
2
2.1
DB3TG
Package information
Package information
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com
. ECOPACK is an ST trademark.
DO-35 package information
Figure 7. DO-35 package outline
C A C
ØD
ØB
DS2137 - Rev 3
Ref.
C
D
A
B
1. Inches given for reference only
Min.
3.05
1.53
28
0.46
Table 3. DO-35 package mechanical data
Dimensions
Millimeters
Max.
4.50
2
31
0.55
Min.
0.120
0.060
1.102
0.018
Inches (1)
Max.
0.177
0.079
1.220
0.022
page 6/9
3
DB3TG
Ordering information
Ordering information
Figure 8. Ordering information scheme
DB 3 TG
Diac Series
Special V
BO
range
Breakover voltage
3: V
BO
typ = 32V
Order code
DB3TG
Table 4. Ordering information
Marking
DB3TG (Blue Body Coat)
Package
DO-35
Weight
0.15 g
Base qty.
5000
Delivery mode
Tape and reel
DS2137 - Rev 3 page 7/9
Revision history
Date
Oct-2001
07-May-2019
Table 5. Document revision history
Version
2
3
Changes
Previous release.
Updated Section 1.1 Characteristics (curves) .
DB3TG
DS2137 - Rev 3 page 8/9
DB3TG
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DS2137 - Rev 3 page 9/9
