INTEGRATED CIRCUITS DATA SHEET UBA2000T Electronic TL-lamp starter Product specification File under Integrated Circuits, IC11 1996 Jan 03 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T FEATURES GENERAL DESCRIPTION • Electronic starter, fully compatible with conventional glow-switch starters The UBA2000T is an integrated circuit for electronic TL-lamp starters and is fully compatible with conventional glow switch starters. The circuit controls the preheating and ignition of the lamp. The preheat time is well defined without spread, since it is derived from the mains frequency. When the lamp fails, ignition is shut-off after 7 ignition attempts. The circuit has an automatic reset when the supply voltage is interrupted. • Reliable and instant ignition • Accurate defined preheat time derived from the mains frequency • Increased starter life since no mechanical parts are used • No radio-interference (according to “IEC926 10.5”) • Automatic reset after interruption of supply voltage • Large operating temperature range: −40 to +85 °C • Maximum current protection of the preheat current • Ignition shut-off at end of lamp life; no overheating of load. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME UBA2000T 1996 Jan 03 SO8 DESCRIPTION plastic small outline package; 8 leads; body width 3.9 mm 2 VERSION SOT96-1 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T BLOCK DIAGRAM VCC handbook, full pagewidth 6 Vin 4 Vsupply IC-SUPPLY UBA2000T THS OUTPUT DRIVER Vign 3 LATCH VOLTAGE DETECTORS RES VCC(rst) NUMBER OF STARTS COUNTER TIME SELECT DECODER 1 EDGE DETECTOR DECODER 2 COUNTER TEST Vsense 8 1 CURRENT DETECTOR 1 kΩ Rsense CURRENT PROTECTION 2 GND MGE002 Fig.1 Block diagram. 1996 Jan 03 3 Vout Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T PINNING SYMBOL PIN DESCRIPTION Vsense 1 sense voltage GND 2 ground (0 V) Vout 3 output voltage Vin 4 input voltage n.c. 5 not connected VCC 6 supply voltage n.c. 7 not connected TEST 8 test pin handbook, halfpage Vsense 1 GND 2 TEST 7 n.c. UBA2000T Vout 3 6 VCC Vin 4 5 n.c. MGE001 Fig.2 Pin configuration. When the switching device is turned on, the circuit draws its supply current from buffer capacitor C1. A typical wave shape of the voltage at pin 6 (VCC) is given in Fig.3. During the preheat periods the buffer capacitor is discharged. The rectified current through the sense resistor is detected and the output signal of the detector is used as a clock signal for the counter. The preheat time is defined to 1.52 s (at 50 Hz mains supply) using this counter. The preheat time is very accurate, since it only depends on the frequency of the mains supply. FUNCTIONAL DESCRIPTION The UBA2000T is an Integrated Circuit that performs all functions necessary to ignite a TL-lamp. The circuit is connected to the lamp circuit according to Figs. 7 or 8. The mains voltage is rectified and divided over resistors R1 and R2 to a lower level. When the mains power is switched on, the buffer capacitor C1 is charged through the resistive divider and internal switch S1. As long as the supply voltage at the buffer capacitor (VCC, see “Characteristics”) is below the reset level (VCC(rst)), the UBA2000T initializes its internal circuitry. After preheating, the switching device is turned off when the current through the internal sense resistor equals at least 285 mA. As a result of the current interruption and the presence of an inductive load, a voltage peak is generated that will normally ignite the TL-lamp. After ignition, the lamp voltage is lower than the mains voltage. An ignited TL-lamp prevents the voltage at pin 6 (VCC) to exceed start level. In Fig.3 the TL-lamp is ignited after two ignition attempts. When VCC has reached the start level (VCC(sl)) and the peak value of Vin > Vign (indicating that the mains supply is near its peak value), the external switching device TH1 will be turned on. This results in a current through the electrodes of the TL-lamp, the switching device and an integrated sense resistor. Because the current starts to flow when the mains voltage is near its peak value, transient currents are limited. MGE006 handbook, full pagewidth VCC(sl) VCC first ignition second ignition first preheat second preheat tprf tprn time tini Fig.3 Typical wave shape of supply voltage. 1996 Jan 03 8 4 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T This time depends on the value of C1, the IC current and the source resistance at pin Vin (R1//R2). When the mains voltage is near its peak value, the switching device is actually turned on. When the voltage decreases to a value indicating that the mains supply is interrupted, the starter is ready to start preheating and igniting the TL-lamp at the moment the mains supply returns. During preheating, the integrated circuit draws its supply current from the buffer capacitor. As a result, the voltage over the buffer capacitor decreases. When the ignition has failed after the ignition pulse, the voltage on the buffer capacitor increases to start level and the external switching device will be turned on again. This time the preheat time is reduced to 0.64 seconds because the lamp electrodes are still warm. An internal counter limits the number of ignitions attempts to 7. This prevents the lamp from flickering at end of lamp life. Latch The internal state of the latch represents the state of the switching device. The setting of the latch depends on the outputs of the voltage detectors, the number of starts counter and the standby state. Resetting the latch is controlled by the timer, the current detector and the current protection circuit. The UBA2000T has an integrated current protection. When the current through the sense resistor exceeds the protection level (Iprot), the switching device is turned off and the circuit will enter a standby state. Switching the mains voltage off and on again will reset the circuit. The flow chart of the starting process is given in Fig.5. In the following subsections the several blocks of the block diagram are described in more detail. Current detector The current detector detects when the switching device must be turned off. The current detector also generates the clock pulses to activate the counter (see Fig.4). For proper functioning, the preheat current should be within the range indicated by Ipr. By including an hysteresis, unwanted current peaks on the preheat current have no effect on the counter. Because the current detector has a low-pass transfer function, it is not influenced by spikes. This circuitry eliminates the effect of spikes on the preheat time. IC supply When the mains power is switched on, the buffer capacitor is charged and the internal current source is started. The internal voltage is stabilized, making it independent of the voltage at the buffer capacitor. An internal zener diode limits the voltage at pin 6 (VCC) to start level (VCC(sl)). Voltage detectors Edge detector The voltage detectors measure the voltage on the buffer capacitor and activate the switching device when the start value (VCC(sl)) is reached. The time required to charge the capacitor is the initial time (tini, see also Fig.3). The edge detector ensures that the switching device will be turned off when the rectified preheat current is on the negative-going edge. handbook, full pagewidth Iso level hysteresis current through sense resistor clock signal (fed to counter) MGE007 clock generation during preheat switch off level at end of preheat Fig.4 Current detection. 1996 Jan 03 5 Philips Semiconductors Product specification Electronic TL-lamp starter handbook, full pagewidth UBA2000T Start charging of C1 S1 is closed LOW VOLTAGE DETECTION Enable reset N=1 N: ignition attempt count no no VCC < VCC(rst) VCC > VCC(rst) yes yes Disable reset Close int. switches Turn ext. switch off (if it was on) no VCC > VCC(sl) yes yes N>7 Standby state no Open int. switches no Vin > Vign The ext. switch is closed when mains voltage is near its peak value yes Switch ext. switch on yes CURRENT ALARM !! yes 1st start ? (N = 1) no Isense > Iprot Isense > Iprot and t > td no Preheat time > tprf yes and t > td no no no yes Preheat time > tprn yes Close int. switches no Turn ext. switch off (if it was on) Isense falling edge ? Isense = Iso yes Standby state Close int. switches Turn ext.switch off (Generate voltage-peak to ignite TL-lamp) N=N+1 MGE003 Fig.5 Flow chart. 1996 Jan 03 6 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T This has a minimal effect on the voltage division ratio, since the voltage at the gate of the trigger device is low. The output driver generates the current pulse, which is necessary to activate the external switching device TH1. This current pulse is synchronized with the voltage at pin 4 (Vin). The switching device is triggered when Vin reaches the Vign level. In that way the current through resistors R1 and R2 is a part of the current needed to activate the switching device. If necessary, the current pulse is delivered every half cycle of the mains voltage. When the switching device must be turned off, the output driver is capable of sinking the gate turn-off current of the switching device. Counter With the counter, which is supplied with pulses with twice the frequency of the mains supply, the preheat time for the first preheat and (if necessary) the next six preheats is defined. Time select Depending on the state of the counter a long (tprf = 1.52 s) or a short (tprn = 0.64 s) preheat time is selected. Number of starts counter The number of starts are counted by a counter. After seven ignition attempts the IC is brought into standby state. In standby state the supply current (ICC) is increased. Due to the increased current, the buffer capacitor C1 will discharge faster when the starter is disconnected from the mains. This makes it possible to automatically reset the starter the moment a malfunctioning tube is replaced by a new one. It might be necessary to limit the current peaks, which flow through the switching device at turn-on, resulting from discharging the suppressor capacitor (C2). This can be achieved using a resistor (R3). GATE INPUT DEVICE A typical application that uses a MOSFET is given in Fig.8. In this circuit the resistive divider is connected to ground. The output driver of the IC operates the same way as when a trigger device is used. The output current pulse will charge the gate of the MOSFET. As a result, the MOSFET will be activated. Current protection When the current through the sense resistor exceeds its limit (Iprot), the switching device will be turned off. During the first few periods of conduction, the current protection is disabled (disable time td) to ensure that transient currents do not trigger the current protection. When the current has exceeded its limit, the switching device is turned off and the IC enters the standby state that prevents re-activating the switching device. Only an interruption of the supply voltage will reset the standby state. To keep the MOSFET conductive, a high ohmic pull-up resistor is connected between the gate of the MOSFET and the buffer capacitor C1. This is necessary, because the output current is a pulse and not a continuous signal. This pull-up resistor increases the current which is drawn from the buffer capacitor. An internal zener diode in the IC limits the voltage at the output (and thus at the gate of the MOSFET) to a typical value of 6.8 V. Output driver The output driver is capable of driving a low input current trigger device as well as a device controlled by a gate. During start-up the output is kept low to prevent turning on the external switching device. Both switching devices require the breakdown voltage (V(BR)AK or V(BR)DS) to be larger than the ignition voltage of the TL-lamp. TRIGGER DEVICE A typical application that uses a low input current trigger device (such as TN22) as switching device is given in Fig.7. The resistive divider R1//R2 is not connected to ground but to the gate of the trigger device. 1996 Jan 03 7 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT Vout output voltage note 1 − 6 V Vin input voltage note 2 − 125 V VTEST voltage at test pin − 6 V Isense current through sense resistor − 6 A Ptot total power dissipation − 395 mW Tstg storage temperature non-operating −55 150 °C Tamb ambient temperature operating −40 85 °C note 3 Notes 1. This pin is connected to an internal zener diode (typical working voltage is 6.8 V). 2. This pin is connected to an internal zener diode (working voltage between 130 and 230 V). The current entering this pin must be limited to <10 mA. 3. Inrush current, duration <2 ms. QUALITY SPECIFICATION In accordance with “SNW-FQ-611-E” with the following exception: With respect to the integrated sense resistor a lifetime of 60000 lamp starts (with max. 7 start attempts) at maximum preheat current level of 1.4 A (RMS) is guaranteed. The number of the quality specification can be found in the “Quality Reference Handbook”. The handbook can be ordered using the code 9397 750 00192. THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER VALUE thermal resistance from junction to ambient in free air 160 UNIT K/W CHARACTERISTICS Tamb = 25 °C; all voltages referenced to GND; see application diagrams (Figs. 7 and 8); Vmains = 220 V, 50 Hz; N is the number of ignition attempts; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT IC voltages VCC(sl) supply voltage start level 40 44 49 V VCC(rst) supply voltage reset level − − 9 V Vign ignition voltage 67 − 97 V 50 − 140 V − 32 42 µA after start attempt; VCC = 30 V − 145 − µA note 2 − 170 − µA striking switching device Lamp voltages Vlamp TL-lamp voltage Supply current ICC supply current VCC = 30 V; note 1 7th Ic 1996 Jan 03 control current 8 Philips Semiconductors Product specification Electronic TL-lamp starter SYMBOL UBA2000T PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Output stage Isource peak source current (pulse shape Fig.6) Vout < 2 V; striking switching device 1.5 − 10 mA Isink output sink current Vout = 0.8 V 50 − − mA tW pulse width VCC = 30 V 5 − − µs Qp pulse charge VCC = 30 V; note 3 21 − − nC Vout output voltage Isink = 0.5 mA; driving gate device in preheat mode − 6.8 − V tprf preheat time (first) N = 1; note 4 − 1.52 − s tprn preheat time (next) 2 ≤ N ≤ 7; note 5 − 0.64 − s tini initial time − 125 − ms Timing Current protection Iprot(m) current protection level (peak value) 2.2 3.4 − A td delay time before current protection is note 6 enabled − 70 − ms note 7 − 26 − mΩ note 8 0.33 − 1.4 A note 9 285 380 475 mA Sense resistor Rsense internal sense resistor Preheat current Ipr(rms) preheat current (RMS value) Switching off current Iso preheat current level at the moment it is switched off Notes 8. To guarantee good functioning, a crest factor of at least 1.5 is needed at low currents. 1. When the switching device is triggered, ICC = Isource. 9. When the holding current of TH1 is lower than Iso, TH1 is switched off at the holding current (in case of a trigger device). 2. This is the active current when the lamp is lit. The given value is valid for Vlamp = 115 V. The total current at Vin equals: Iin = ICC + Ic (leakage currents are neglected). 3. Qp = Isource × tp. 4. Time is derived from the mains frequency; division factor equals 76. handbook, halfpage 3 Isource (mA) 5. Time is derived from the mains frequency; division factor equals 32. 6. The delay time is set by a clock signal, which is derived from the current through the sense resistor. Due to inrush transients of the preheat current, variation of td is possible. tw = 7 µs 7. This is the resistance of the internal sense circuit (excluding the bonding wires). 1996 Jan 03 MGE008 Fig.6 Pulse shape (typical value). 9 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T APPLICATION INFORMATION 0.6 to 2 H handbook, full pagewidth C load mains supply TLLAMP R3 100 Ω Vlamp C2 5.6 nF R1 100 kΩ C1 3.3 µF Vin VCC 6 S1 ICC R2 62 kΩ 4 S2 3 TH1 (i.e. TN22) Vout Ic D0 CIRCUIT UBA2000T 1 2 Vsense GND MGE004 Fig.7 Application diagram (with trigger device). 1996 Jan 03 10 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T 0.6 to 2 H handbook, full pagewidth C load mains supply TLLAMP C2 5.6 nF Vlamp R3 R1 100 kΩ R2 62 kΩ 1 MΩ C1 3.3 µF VCC Vin 6 4 S2 S1 ICC 3 Vout MOSFET Ic CIRCUIT UBA2000T 1 2 Vsense GND MGE005 Fig.8 Application diagram (with MOSFET device). 1996 Jan 03 11 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T PACKAGE OUTLINE SO8: plastic small outline package; 8 leads; body width 3.9 mm SOT96-1 D E A X c y HE v M A Z 5 8 Q A2 A (A 3) A1 pin 1 index θ Lp 1 L 4 e detail X w M bp 0 2.5 5 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (2) e HE L Lp Q v w y Z (1) mm 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 5.0 4.8 4.0 3.8 1.27 6.2 5.8 1.05 1.0 0.4 0.7 0.6 0.25 0.25 0.1 0.7 0.3 0.01 0.019 0.0100 0.014 0.0075 0.20 0.19 0.16 0.15 0.244 0.039 0.028 0.050 0.041 0.228 0.016 0.024 inches 0.010 0.057 0.069 0.004 0.049 0.01 0.01 0.028 0.004 0.012 θ Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT96-1 076E03S MS-012AA 1996 Jan 03 EIAJ EUROPEAN PROJECTION ISSUE DATE 95-02-04 97-05-22 12 o 8 0o Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T SOLDERING Wave soldering Introduction Wave soldering techniques can be used for all SO packages if the following conditions are observed: There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. • A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. • The longitudinal axis of the package footprint must be parallel to the solder flow. • The package footprint must incorporate solder thieves at the downstream end. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “IC Package Databook” (order code 9398 652 90011). During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Reflow soldering Reflow soldering techniques are suitable for all SO packages. Maximum permissible solder temperature is 260 °C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 °C within 6 seconds. Typical dwell time is 4 seconds at 250 °C. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 °C. Repairing soldered joints Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 °C. 1996 Jan 03 13 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. 1996 Jan 03 14 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T NOTES 1996 Jan 03 15 Philips Semiconductors – a worldwide company Argentina: IEROD, Av. Juramento 1992 - 14.b, (1428) BUENOS AIRES, Tel. (541)786 7633, Fax. (541)786 9367 Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. (02)805 4455, Fax. (02)805 4466 Austria: Triester Str. 64, A-1101 WIEN, P.O. Box 213, Tel. (01)60 101-1236, Fax. (01)60 101-1211 Belgium: Postbus 90050, 5600 PB EINDHOVEN, The Netherlands, Tel. (31)40-2783749, Fax. (31)40-2788399 Brazil: Rua do Rocio 220 - 5th floor, Suite 51, CEP: 04552-903-SÃO PAULO-SP, Brazil, P.O. Box 7383 (01064-970), Tel. (011)821-2333, Fax. (011)829-1849 Canada: PHILIPS SEMICONDUCTORS/COMPONENTS: Tel. (800) 234-7381, Fax. (708) 296-8556 Chile: Av. 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(02)92 0601 Internet: http://www.semiconductors.philips.com/ps/ For all other countries apply to: Philips Semiconductors, International Marketing and Sales, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Telex 35000 phtcnl, Fax. +31-40-2724825 SCDS47 © Philips Electronics N.V. 1996 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 297021/1100/01/pp16 Document order number: Date of release: 1996 Jan 03 9397 750 00547