SMDB3 STMICROELECTRONICS | Alldatasheet

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DB3 DB4 SMDB3® October 2001 - Ed: 2B DIAC DO-35 (DB3 and DB4) n VBO : 32V and 40V n LOW BREAKOVER CURRENT

FEATURES

Functioning as a trigger diode with a fixed voltage reference, the DB3/DB4 series can be used in conjunction with triacs for simplified gate control circuits or as a starting element in fluorenscent lamp ballasts. A new surface mount version is now available in SOT-23 package, providing reduced space and compatibility with automatic pick and place equipment.

DESCRIPTION

Symbol Parameter Value Unit I TRM Repetitive peak on-state current t p=2 0µs F= 120 Hz SMDB3 1.00 A DB3 / DB4 2.00 Tstg Tj Storage temperature range Operating junction temperature range -4 0t o+1 2 5 °C ABSOLUTE MAXIMUM RATINGS (limiting values) SOT-23 (SMDB3)* Pin 1 and 3 must be shorted together Note: * SMDB3 indicated as Preliminary spec as product is still in development stage.

Symbol Parameter Test Conditions SMDB3 DB3 DB4 Unit VBO Breakover voltage * C = 22nF MIN. 28 28 35 V TYP. 32 32 40 MAX. 36 36 45 IVBO1 -VBO2 I Breakover voltage symmetry C = 22nF MAX. 3 V Δ V Dynamic breakover voltage * VBO and VF at 10mA MIN. 10 5 V VO Output voltage * see diagram 2 (R=20Ω ) MIN. 10 5 V IBO Breakover current * C = 22nF ** MAX. 10 50 µA tr Rise time * see diagram 3 MAX. 0.50 2 µs IR Leakage current * V R = 0.5 VBO max MAX. 1 10 µA IP Peak current * see diagram 2 (Gate) MIN. 1 0.30 A * Applicable to both forward and reverse directions. ** Connected in parallel to the device. ELECTRICAL CHARACTERISTICS (Tj = 25°C unless otherwise specified) Part Number V BO Package SMDB3 28 - 36 SOT-23 DB3 28 - 36 DO-35 DB4 35 - 45 DO-35 PRODUCT SELECTOR SM DB 3 Surface Mount Version Diac Series Breakover voltage 3: V typ = 32V 4: V typ = 40V BO BO

ORDERING INFORMATION

+I F -IF 0,5 VBO VBO V VF Diagram 1:Voltage - current characteristic curve. D.U.T Vo C=0.1µF 220 V 50 Hz 500 kΩ10 kΩ R=20 Ω IP Rs=0 T410 Diagram 2:Test circuit. 90 % lp 10 % tr Diagram 3:Rise time measurement. Part Number Marking Weight Base Quantity Packing Mode SMDB3 DB3 0.01 g 3000 Tape & Reel DB3 DB3 (Blue Body Coat) 0.15 g 5000 Tape & Reel DB4 DB4 (Blue Body Coat) 0.15 g 5000 Tape & Reel OTHER INFORMATION

C(nF) tp(µs) Tj=25°C 10Ω 22Ω 68Ω 47Ω 33Ω Fig. 3:Time duration while current pulse is higher 50mA versus C and Rs (typical values). PACKAGE MECHANICAL DATA (in millimeters) DO-35 REF. DIMENSIONS Millimeters Inches Min. Max. Min. Max. A 3.05 4.50 0.120 0.177 B 1.53 2.00 0.060 0.079 C 28.00 1.102 D 0.458 0.558 0.018 0.022 CA BO/ O/DO/D C 25 50 75 100 1250.80 0.85 0.90 0.95 1.00 1.05 1.10 Tj(°C) VBO [Tj] / VBO [Tj=25°C] SMDB3 DB3/DB4 Fig. 1:Relative variation of VBO versus junction temperature (typical values). 1 10 1000.1 1.0 10.0 20.0 tp(µs) ITRM(A) SMDB3 DB3/DB4 F=120Hz Tj initial=25°C Fig. 2:Repetitive peak pulse current versus pulse duration (maximum values).

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 ap- proval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics © 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 PACKAGE MECHANICAL DATA (in millimeters) SOT-23 B E S e A D c L H REF. DIMENSIONS Millimeters Inches Min. Max. Min. Max. A 0.89 1.4 0.035 0.055 A1 0 0.1 0 0.004 B 0.3 0.51 0.012 0.02 c 0.085 0.18 0.003 0.007 D 2.75 3.04 0.108 0.12 e 0.85 1.05 0.033 0.041 e1 1.7 2.1 0.067 0.083 E 1.2 1.6 0.047 0.063 H 2.1 2.75 0.083 0.108 L 0.6 typ. 0.024 typ. S 0.35 0.65 0.014 0.026 0.9 0.035 0.9 0.035 1.9 0.075 mm inch 2.35 0.92 1.1 0.043 1.1 0.043 1.45 0.037 0.9 0.035 FOOTPRINT