TN22 ® STARTLIGHT FEATURES AND BENEFITS ■ ■ ■ 3 TAB 1 DESCRIPTION 1 2, TAB High clamping voltage structure (1200 -1500V) Low gate triggering current for direct drive from line (< 1.5mA) High holding current (> 175mA), ensuring high striking energy. 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 triggering power. Thanks to its electronic concept, this TN22 based starter offers high reliability levels and extended life time of the fluorescent tubelamps. TAB 1 2 3 2 DPAK (TN22-B) 3 IPAK (TN22-H) TAB 1 2 3 TO-22AB (TN22-T) Table 1: Absolute ratings (limiting values) Symbol Parameter Value Unit VRRM 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 sinewave (180° conduction angle) Tc = 95°C 1.8 A Non repetitive surge peak on-state current (Tj initial = 25°C) tp = 8.3ms 22 tp = 10ms 20 I2t Value for fusing tp = 10ms 2 A2s 50 A/µs -40 to +150 -40 to +110 °C 260 °C ITSM 2 I t dl/dt Critical rate of rise of on-state current IG =5mA dIG /dt = 70 mA/µs. Tstg Tj Storage and operating junction temperature range TI Maximum lead temperature for soldering during 10s at 4.5mm from case September 2005 REV. 2 A 1/9 TN22 Table 2: Thermal resistance Symbol Parameter Rth(j-a) Junction to AMBIENT Rth(j-c) Junction to case Value DPAK / IPAK 100 TO-220AB 60 Unit °C/W 3 °C/W Type Value Unit GATE CHARACTERISTICS (maximum values) PG (AV) = 300 mW PGM = 2W(tp = 20 µs) IFGM=1 A (tp = 20 µs) VRGM = 6V Table 3: Static electrical characteristics (per diode) Symbol IGT VD=12V (DC) RL= 33Ω Tj = 25°C MAX 1.5 mA VGT VD=12V (DC) RL= 33Ω RGK = 1 KΩ Tj = 25°C MAX 3 V IH VGK = 0V Tj = 25°C MIN 175 mA VTM ITM = 2A 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%VDRM VGK = 0V Tj = 110°C MIN 500 V/µs Symbol VBR 2/9 Test conditions tp = 380µs Test conditions ID = 5mA VGK = 0V Tj = 25°C Type Value TN22-1500 Unit MIN 1200 V MAX 1500 V ® TN22 This thyristor has been designed for use as a fluorescent tube starter switch. ■ ■ An electronic starter circuit provides : A pre-heating period during which a heating current is applied to the cathode heaters. One or several high voltage striking pulses across the lamp. Figure 1: Basic application diagram INDUCTANCE BALLAST STARTER CIRCUIT AC VOLTAGE FLUORESCENT TUBE R TN22 CONTROLLER (TIMER) S 1/ Pre-heating At rest the switch S is opened and when the mains voltage is applied across the circuit a full wave rectified current flows through the resistor R and the TN22 gate : at every half-cycle when this current reaches the gate triggering current (IGT) 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 (IH) 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 current 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 (VBR). If the lamp is not struck after the first pulse, the system 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 triggering 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 series in the thyristor cathode. 3/9 TN22 Figure 2: Maximum average power dissipation versus average on-state current (rectified full sinewave) Figure 3: Correlation between maximum average power dissipation and maximum allowable temperature (Tamb and Tcase) for different thermal resistances heatsink + contact PT(av) (W) PT(av) (W) 6 = 180 5 = 120 4 = 90 = 60 3 = 30 2 6 o Rth=8 o C/W Rth=12 oC/W o 4 o 3 o 2 1 0.2 0.4 0.6 0.8 o 1.2 1.4 1.6 1.8 2 1 Figure 4: Averrage on-state current versus case temperature (rectified full sine wave) Tcase ( C) 0 0 10 20 30 40 50 60 70 80 90 100 110 Figure 5: Thermal transient impedance junction to ambient versus pulse duration I T(av) (A) 2.0 1.8 o 1.6 = 180 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 10 20 o 1 I T(av) (A) 0 Rth=0 o C/W 5 o = 180 0 Rth=4 o C/W Zth(j-a)(oC/W) 1.0E+02 1.0E+01 1.0E+00 o Tcase ( C) 30 40 50 60 70 80 90 100 110 Figure 6: Relative variation of gate trigger current and holding current versus junction temperature Igt[Tj] o Igt[Tj=25 C] Ih[Tj] Ih[Tj=25 o C] 1.0E-01 1.0E-02 tp(S) 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03 Figure 7: Non repetitive surge peak on-state current versus number of cycles ITSM(A) 20 3.0 Tj initial = 25oC F = 50Hz 18 16 2.5 14 2.0 12 Igt 10 1.5 8 Ih 6 1.0 4 0.5 2 Tj(oC) 0.0 -40 4/9 -20 0 20 40 60 80 100 120 140 0 1 Number of cycles 10 100 1000 ® TN22 Figure 8: Non repetitive surge peak on-state current for a sinusoidal pulse with width : tp = 10ms, and corresponding value fo I2t Figure 9: On-state characteristics (maximum values) I TSM (A). I2 t (A2 s) VTM (V) 100 Tj initial = 25 oC 8 7 I TSM Tj=110 oC Vto =2.50V Rt =0.235 6 Tj=110 oC 5 10 4 Tj=25 oC 3 2 I2 t 1 tp(ms) 1 1 10 Figure 10: Relative variation of holding current versus gate-cathode resistance (typical values) 500 1 10 20 Figure 11: 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) IH (mA) Tj=25 oC I TM (A) 0 0.1 11 IT(rms) (A) 10 Tc initial = 25 oC 9 100 8 7 Tc initial = 45 oC 6 5 10 Tc initial = 65 oC 4 3 2 Rgk( ) 1 1 10 100 1000 1 0.1 tp(s) 1 10 100 Figure 12: Ordering information scheme TN 2 2 - 1500 B (-TR) STARTLIGHT DEVICE IT(RMS) MAX 2: 2 A VBR max: 1500: 1500V IGT MAX 2: 1.5 mA ® PACKAGE: B: DPAK H: IPAK T: TO-220AB PACKING MODE: Blank: Tube -TR: DPAK Tape & Reel 5/9 TN22 Figure 13: DPAK Package mechanical data DIMENSIONS REF. 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 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° Figure 14: Footprint dimensions (in millimeters) 6.7 6.7 3 3 1.6 1.6 2.3 6/9 2.3 ® TN22 Figure 15: TO-220 Package mechanical data REF. A H2 Dia C L5 L7 L6 L2 F2 F1 D L9 L4 F M G1 E G ® A C D E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 M Diam DIMENSIONS Millimeters Inches Min. Max. Min. Max. 4.40 4.60 0.173 0.181 1.23 1.32 0.048 0.051 2.40 2.72 0.094 0.107 0.49 0.70 0.019 0.027 0.61 0.88 0.024 0.034 1.14 1.71 0.044 0.066 1.14 1.70 0.044 0.066 4.95 5.15 0.194 0.202 2.40 2.70 0.094 0.106 10 10.40 0.393 0.409 16.4 Typ. 0.645 Typ. 13 14 0.511 0.551 2.65 2.95 0.104 0.116 15.25 15.75 0.600 0.620 6.20 6.60 0.244 0.259 3.50 3.93 0.137 0.154 2.6 Typ. 0.102 Typ. 3.75 3.85 0.147 0.151 7/9 TN22 Figure 16: IPAK Package mechanical data REF. A E C2 B2 L2 D H L B3 L1 A1 B V1 B5 e C A3 G A A1 A3 B B2 B3 B5 C C2 D E e G H L L1 L2 V1 DIMENSIONS Millimeters Inches Min. Typ. Max. Min. Typ. 2.20 2.40 0.086 0.90 1.10 0.035 0.70 1.30 0.027 0.64 0.90 0.025 5.20 5.40 0.204 0.95 0.30 0.035 0.45 0.60 0.017 0.48 0.60 0.019 6 6.20 0.236 6.40 6.60 0.252 2.28 0.090 4.40 4.60 0.173 16.10 0.634 9 9.40 0.354 0.8 1.20 0.031 0.80 1 0.031 10° 10° Max. 0.094 0.043 0.051 0.035 0.212 0.037 0.023 0.023 0.244 0.260 0.181 0.370 0.047 0.039 Table 4: Ordering information Type Marking Package Weight Base Qty Delivery mode TN22-1500B TN22-1500 DPAK 0.3 g 75 Tube TN22-1500B-TR TN22-1500 DPAK 0.3 g 2500 Tape & Reel TN22-1500H TN22-1500 IPAK 0.4 g 75 Tube TN22-1500T TN22-1500 TO-220AB 2.0 g 50 Tube Table 5: Revision History 8/9 Date Revision Description of Changes Oct-2000 1 First issue. 17-Sep-2005 2 TO-220AB package added. ® TN22 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. All other names are the property of their respective owners © 2005 STMicroelectronics - All rights reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States www.st.com ® 9/9