TN22 STMICROELECTRONICS | Alldatasheet
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Technical content
TN22® STARTLIGHT October 2000 - Ed:1 /B6e High clamping voltage structure (1200 - 1500V) /B6e Low gate triggering current for direct drive from line (< 1.5mA) /B6e High holding current (> 175mA), ensuring high striking energy.
FEATURES
The TN22 has been specifically developed for use in electronic starter circuits. Use in conjunction with a sensitive SCR and a resistor, it provides high energy striking characteristics with low trig- gering power. Thanks to its electronic concept, this TN22 based starter offers high reliability levels and extended life time of the fluorescent tubelamps.
DESCRIPTION
Symbol Parameter Value Unit V DRM Repetitive peak off-state voltage Tj= 110°C 400 V IT(RMS) RMS on-state current Full sine ware (180° conduction angle) Tc= 95°C 2 A IT(AV) Mean on-state current Full sine ware (180° conduction angle) Tc= 95°C 1.8 A ITSM Non repetitive surge peak on-state current (Tjinitial = 25°C) tp = 8.3ms 22 A tp = 10ms 20 I2t I2t Value for fusing tp = 10ms 2 A 2s dI/dt Critical rate of rise of on-state current IG =5m A d I G /dt = 70 mA/µs.
50 A/ µs
Storage and operating junction temperature range -4 0t o+1 5 0 -4 0t o+1 1 0 Tl Maximum lead temperature for soldering during 10s at 4.5mm from case 260 °C ABSOLUTE RATINGS (limiting values) 2, TAB 1 TAB TAB DPAK (TN22-B) IPAK (TN22-H) Application Specific Discretes A.S.D.™
Symbol Parameters Value Unit Rth(j-a) Junction to ambient 100 °C/W Rth(j-c) Junction to case 3 °C/W THERMAL RESISTANCES PG (AV)= 300 mW P GM =2W( t p=2 0µs) IFGM =1A( t p=2 0µs) V RGM =6 V GATE CHARACTERISTICS (maximum values) Symbol Test conditions Type Value Unit IGT VD =12V (DC) R L=33Ω Tj= 25°C MAX 1.5 mA VGT VD =12V (DC) R L=33Ω R GK =1K Ω Tj= 25°C MAX 3 V IH VGK =0 V Tj= 25°C MIN 175 mA VTM ITM = 2A tp= 380µs Tj= 25°C MAX 3.1 V IDRM VDRM Rated Tj= 25°C MAX 0.1 mA dV/dt Linear slope up to VD =67%V DRM VGK =0 V Tj= 110°C MIN 500 V/ µs
ELECTRICAL CHARACTERISTICS
Symbol Test conditions Type Value Unit TN22-1500 VBR ID = 5mA V GK = 0V Tj = 25°C MIN 1200 V MAX 1500 V
This thyristor has been designed for use as a fluo- rescent tube starter switch. An electronic starter circuit provides : n A pre-heating period during which a heating current is applied to the cathode heaters. n One or several high voltage striking pulses across the lamp. TN22 R S STARTER CIRCUIT CONTROLLER (TIMER) INDUCTANCE BALLAST FLUORESCENT TUBE AC VOLTAGE BASIC APPLICATION DIAGRAM PRINCIPLE OF OPERATION 1/ Pre-heating At rest the switch S is opened and when the mains voltage is applied across the circuit a full wave rec- tified current flows through the resistor R and the TN22 gate : at every half-cycle when this current reaches the gate triggering current (I GT ) the thyris- tor turns on. When the device is turned on the heating current, limited by the ballast choke, flows through the tube heaters. The pre-heating time is typically 2 or 3 seconds. 2/ Pulsing At the end of the pre-heating phase the switch S is turned on. At this moment : If the current through the devices is higher than the holding current (I H ) the thyristor remains on until the current falls below IH . Then the thyristor turns off. If the current is equal or lower than the holding cur- rent the thyristor turns off instantaneously. When the thyristor turns off the current flowing through the ballast choke generates a high voltage pulse. This overvoltage is clamped by the thyristor avalanche characteristic (V BR ). If the lamp is not struck after the first pulse, the sys- tem starts a new ignition sequence again. 3/ Steady state When the lamp is on the running voltage is about 150V and the starter switch is in the off-state. IMPLEMENTATION The resistor R must be chosen to ensure a proper triggering in the worst case (minimum operating temperature) according to the specified gate trig- gering current and the peak line voltage. Switch S : This function can be realized with a gate sensitive SCR type : P0130AA 1EA3 This component is a low voltage device (< 50V) and the maximum current sunk through this switch can reach the level of the thyristor holding current. The pre-heating period can be determined by the time constant of a capacitor-resistor circuit charged by the voltage drop of diodes used in se- ries in the thyristor cathode.
T(av)I( A ) = 180 o =1 2 0 o =6 0 o =3 0 o =9 0 o T(av)P( W ) 0 0 Fig.1 :Maximum average power dissipation ver- sus average on-state current (rectified full sine wave). 10 20 30 40 50 60 70 80 90 100 1100.00.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Tcase ( C) o T(av)I( A ) =1 8 0 o Fig.3 :Average on-state current versus case tem- perature (rectified full sine wave). 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Igt Tj( C)o Ih -40 -20 0 20 40 60 80 100 120 140 Igt[Tj] Igt[Tj=25 C] o Ih[Tj] Ih[Tj=25 C] o Fig.5 :Relative variation of gate trigger current and holding current versus junction temperature. =1 8 0 o Tcase ( C) o Rth=12 C/Wo Rth=8 C/Wo Rth=4 C/Wo Rth=0 C/Wo 10 20 30 40 50 60 70 80 90 100 110 T(av)P( W ) Fig.2 :Correlation between maximum average power dissipation and maximum allowable tem- perature (Tamb and Tcase) for different thermal resistances heatsink + contact. 1.0E+00 1.0E+01 1.0E+02 Zth(j-a)(oC/W) tp(S) Fig.4 :Thermal transient impedance junction to ambient versus pulse duration. 1 10 100 1000 Tj initial = 25 C F=5 0 H z o Number of cycles I( A )TSM Fig.6 :Non repetitive surge peak on-state current versus number of cycles.
I( A ) . I2 t( A2 s)TSM Tj initial = 25 Co ITSM tp(ms) I2 t 100 Fig.7 :Non repetitive surge peak on-state current for a sinusoidal pulse with width : tp= 10ms, and corresponding value of I2t. 0.1 11 0 200 V( V )TM I( A )TM Tj=25 Co Tj=110 Co Tj=110 C Vto =2.50V Rt =0.235 o Fig.8 :On-state characteristics (maximum values). 1 10 100 1000 100 500 Rgk( ) I( m A )H Tj=25 Co Fig.9 :Relative variation of holding current versus gate-cathode resistance (typical values). I( A )T(rms) tp(s) 0.1 1 10 100 Tc initial = 25 Co Tc initial = 45 Co Tc initial = 65 Co Fig.10 :Maximum allowable RMS current versus time conduction and initial case temperature. Note : Calculation made fot Tj max = 135°C (the failure mode will be short circuit) TN 2 2 - 1500 B (-TR) STARTLIGHT DEVICE I MAX 2: 1.5 mA GT V max: 1500: 1500V BR I MAX 2: 2 A T(RMS) PACKAGE: B: DPAK H: IPAK PACKING MODE: Blank: Tube -TR: DPAK Tape & Reel
ORDERING INFORMATION
REF. DIMENSIONS Millimeters Inches Min. Max Min. Max. A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A2 0.03 0.23 0.001 0.009 B 0.64 0.9 0.025 0.035 B2 5.2 5.4 0.204 0.212 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.018 0.023 D 6.0 6.2 0.236 0.244 E 6.4 6.6 0.251 0.259 G 4.4 4.6 0.173 0.181 H 9.35 10.1 0.368 0.397 L2 0.80 typ. 0.031 typ. L4 0.6 1.0 0.023 0.039 V2 0° 8° 0° 8° 6.7 6.7 1.61.6 2.32.3 FOOTPRINT
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 © 2000 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 IPAK H L L1 G B D C A B3B6 E REF. DIMENSIONS Millimeters Inches A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A3 0.7 1.3 0.027 0.051 B 0.64 0.9 0.025 0.035 B2 5.2 5.4 0.204 0.212 B3 0.85 0.033 B5 0.3 0.035 B6 0.95 0.037 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 0.244 E 6.4 6.6 0.252 0.260 G 4.4 4.6 0.173 0.181 H 15.9 16.3 0.626 0.641 L 9 9.4 0.354 0.370 L1 0.8 1.2 0.031 0.047 L2 0.8 1 0.031 0.039 V1 10° 10° Type Marking Package Weight Base Qty Delivery mode TN22-1500B TN221500 DPAK 0.3 g 75 Tube TN22-1500B-TR TN221500 DPAK 0.3 g 2500 Tape & Reel TN22-1500H TN221500 IPAK 0.4 g 75 Tube OTHER INFORMATION