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 (R)
TMMDB3
DIAC
FEATURES
s
s
VBO : 32V Breakover voltage range: 28 to 36V
DESCRIPTION Functioning as a trigger diode with a fixed voltage reference, the TMMDB3 can be used in conjunction with triacs for simplified gate control circuits or as a starting element in fluorescent lamp ballasts. MINIMELF
ABSOLUTE MAXIMUM RATINGS (limiting values) Symbol ITRM Parameter Repetitive peak on-state current tp = 20 s F= 120 Hz Storage temperature range Operating junction temperature range Value 2 Unit A C
Tstg Tj
- 40 to + 125
March 2001 - Ed: 3A
1/4
TMMDB3
ELECTRICAL CHARACTERISTICS (Tj = 25C unless otherwise specified) Symbol VBO Parameter Breakover voltage * Test Conditions C = 22nF ** MIN. TYP. MAX. I VBO1 - VBO2 I V VO IBO tr IR Breakover voltage symmetry Dynamic breakover voltage * Output voltage * Breakover current * Rise time * Leakage current * C = 22nF ** VBO and VF at 10mA see diagram 2 (R=20) C = 22nF ** see diagram 3 VR = 0.5 VBO max MAX. MIN. MIN. MAX. MAX. MAX. Value 28 32 36 3 5 5 50 2 10 V V V A s A Unit V
* Applicable to both forward and reverse directions. ** Connected in parallel to the device.
ORDERING INFORMATION
TMM
MINIMELF Diac Series
DB
3
Breakover voltage 3: VBO typ = 32V
OTHER INFORMATION Part Number TMMDB3 (None) Marking Weight 0.04 g Base Quantity 2500 Packing Mode Tape & Reel
2/4
TMMDB3
Diagram 1: Voltage - current characteristic curve. Diagram 2: Test circuit.
10 k 500 k D.U.T Rs=0
+ IF 10mA
220 V 50 Hz
C=0.1F Vo
I
P
T410 R=20
IBO IR 0,5 VBO V VF VBO
-V
+V
Diagram 3: Rise time measurement.
lp 90 %
- IF
10 % tr
Fig. 1: Relative variation of VBO versus junction temperature (typical values)
VBO [Tj] VBO [Tj = 25C]
1.08
Fig. 2: Repetitive peak pulse current versus pulse duration (maximum values).
ITRM(A) 20.0 10.0
F=120Hz Tj initial=25C
1.06
1.04
1.0
1.02
Tj (C)
1.00 25 50 75 100 125
tp(s) 0.1 1 10 100
3/4
TMMDB3
Fig. 3: Time duration while current pulse is higher 50mA versus C and Rs (typical values).
tp(s) 40
Tj=25C
35 30 25 20 15 10 5 0 10 20 50
10 0 33 47
68
22
C(nF) 200 500
100
PACKAGE MECHANICAL DATA (in millimeters) MINIMELF
A
REF.
E F
DIMENSIONS Millimeters Min. Typ. Max. Min.
3.40 1.60 0.45 1.50 3.6 1.62 0.50 0.130 0.063 0.016
Inches Typ. Max.
0.134 0.063 0.018 0.059 0.142 0.064 0.020
/ OB
A B
3.30 1.59 0.40
OD / C O 0.05 E-F / C
C D
FOOTPRINT
2
2.5 5
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics (c) 2001 STMicroelectronics - Printed in Italy - All rights reserved. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 4/4


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