INTEGRATED CIRCUITS DATA SHEET TEA1501 Greeny; GreenChip Preliminary specification File under Integrated Circuits, IC11 1998 Aug 19 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 FEATURES * Under-voltage lockout * Direct off-line operation (90 to 276 V AC) * Over-temperature protection. * Low external component count GENERAL DESCRIPTION * Integrated high voltage startup current source for a fast startup within 0.25 s The TEA1501 (Greeny) is the low power member of the GreenChip family and is especially designed for standby switched mode power supply applications. Greeny incorporates all the necessary functions for an efficient and low cost power supply for 90 to 276 V AC universal input. Greeny is a monolithic integrated circuit and is available in a DIP8 package. The design is made in the BCD_PowerLogic750 process and includes the high voltage switching device. Using only 7 functional pins, Greeny contains extensive control functions to form a flexible and a reliable power supply with a minimum of external components. Greeny operates in a flyback topology (see Fig.1) with a fixed switching frequency, constant primary peak current control and regulates the output voltage in burst mode. * Integrated power switch: 650 V, 40 , 0.25 A * Programmable primary peak current * Data transfer from isolated secondary side to non-isolated primary side via the transformer * On/Off function replaces expensive mains switch by a functional switch. Green features * Low current consumption in Off mode, typical 40 A * Efficient burst mode operation, for 0.1 to 3 W output power. Protection features Applications include low power supplies and standby power supplies as used in television, monitor, lighting electronics and domestic appliances with an output power from 0.1 to 3 W. * Cycle-by-cycle current control with programmable primary peak current * Over-voltage protection BASIC FLYBACK CONFIGURATION handbook, full pagewidth Vin Vout np ns load Vzener on/off Drn Src n.c. OOD Bt TEA1501 CBt Gnd Vaux Ref RSrc (1) na RRef MGM823 (1) The secondary earthing point is isolated from the primary earthing points. Fig.1 Basic flyback configuration. 1998 Aug 19 2 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 QUICK REFERENCE SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Von/off on/off level Greeny 0.4 0.7 0.9 V Vdata(off) data off level 20 A < IOOD < 100 A 0.9 1.3 1.6 V Vdata(on) data on level 20 A < IOOD < 100 A 3.5 4.0 4.5 V Istart startup current, Vaux pin VVaux = 8 V, VOOD > 0.9 V -2.4 -1.8 -1.2 mA IDrn(off) drain current in Off mode VOOD < 0.4 V - 40 100 A VBD breakdown voltage IDrn(off) + 100 A 650 - - V Rdson on resistance Tj = 25 C, IDrn = 80 mA 25 40 55 Vdetect detection level 0.47 0.50 0.53 V ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TEA1501 1998 Aug 19 DIP8 DESCRIPTION plastic dual in-line package; 8 leads (300 mil) 3 VERSION SOT97-1 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 BLOCK DIAGRAM handbook, full pagewidth SUPPLY CURRENT TRACKING Gnd Vaux Ref Drn 5 4 8 Vaux MANAGEMENT REFERENCE BLOCK TEMPERATURE PROTECTION 6 LOGIC SWITCH OSCILLATOR COUNTER GATE DRIVER LEADING EDGE BLANKING MODULATOR Bt startup current source 3 BURST OSCILLATOR on/off level OOD 2 power switch 1 data on Src data off Vdetect TEA1501 MGM820 Fig.2 Block diagram. PINNING SYMBOL PIN DESCRIPTION Src 1 source of the power switch and input for primary current sensing OOD 2 on/off input and data transfer output Bt 3 input for burst capacitor Ref 4 input for reference resistor Vaux 5 supply input of the IC and input for voltage regulation Gnd 6 ground n.c. 7 not connected to comply with safety requirements Drn 8 drain of the power switch and input for startup current 1998 Aug 19 handbook, halfpage Src 1 8 Drn OOD 2 7 n.c. TEA1501 Bt 3 6 Gnd Ref 4 5 Vaux MGM821 Fig.3 DIL8 Package. 4 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 As all the windings of the flyback transformer have the same flux variation, the secondary voltage and the auxiliary voltage are related via the turns-ratio (ns/na). Therefore, the isolated secondary voltage is controlled by the non-isolated auxiliary voltage. FUNCTIONAL DESCRIPTION The TEA1501 contains a high voltage power switch, a high voltage startup circuit and low voltage control circuitry on the same IC. Together with a transformer and a few external components a low power, isolated, flyback converter can be built. The Greeny system operates in a burst mode. During each burst period the output voltage is regulated to a desired voltage level. The burst mode operates by switching at high frequency until the Vaux voltage reaches its regulation level of 20 V. Greeny stops switching until the time period set by the burst oscillator has expired. At the start of the next burst period Greeny starts switching at high frequency and repeats the cycle again. System operation ON/OFF To guarantee a stable operation in a burst mode controlled system a Vaux slope compensation circuit is integrated in Greeny. The Greeny system delivers a constant voltage to the secondary load until a burst duty cycle of 40%. The Greeny system can be switched on and off by means of a low cost, low voltage switch. In the Off mode the startup current source and power switch are disabled. In the On mode, Greeny delivers the startup current for the supply capacitor and after the supply voltage reaches the startup level Greeny activates the power switch. DATA TRANSFER The TEA1501 has a data transfer function which makes communication from the isolated secondary side to the non-isolated primary side of the transformer possible, without using an opto-coupler. This communication function is activated by increasing the secondary load. With this data transfer function a main power supply can be switched on and off by the Greeny system. STARTUP The startup is realized with a high voltage startup current source instead of a dissipative bleeder resistor which is commonly used by low voltage control ICs. When Greeny is switched on, the startup current source is enabled and starts charging the Vaux capacitor. The startup current level is high and accurate (typical 1.8 mA) which results in a well-defined and short startup time, within 0.25 s. After the supply voltage reaches the startup level the current source is switched off and the Vaux capacitor supplies the chip. Reducing the power dissipation in the current source to zero after startup is one of the green features of Greeny. The power delivered to the secondary and auxiliary winding is proportional to the number of primary current pulses per burst period, provided that the converter operates in discontinuous conduction mode. During each burst period the number of primary current pulses is counted. A threshold (Ndata) of 56 pulses is integrated. The clamp level on the OOD pin is set to data-on level from data-off level in case the Ndata threshold is passed. This data-on clamp level can be sensed by the on/off input of a main supply control IC of the GreenChip family. The data-on clamp level is maintained until a burst appears with a number of pulses below the Ndata threshold. OPERATION After startup the flyback converter starts delivering energy to the secondary and auxiliary winding. The Greeny system works with fixed switching frequency and fixed peak current. 1998 Aug 19 5 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 Waveforms of Greeny in the Off mode, Startup mode and Operation mode handbook, full pagewidth VDrn detection level VSrc regulation level VVaux Vout VBt VOOD on/off level switch period switch on time off startup burst on time burst period MGM828 operation Fig.4 Waveforms of Greeny in the Off mode, Startup mode and Operation mode. 1998 Aug 19 6 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 CIRCUIT BLOCK DESCRIPTION Startup current source On/Off/Data section The startup sequence is carried out using an accurate startup current source. The startup current flows from the Drn pin to the Vaux pin via the startup current source and charges the Vaux capacitor. When Vaux reaches the startup threshold the startup current is switched off and the flyback converter starts operating and the output voltage rises. The Vaux capacitor must be capable of supplying the entire supply current (IVaux(LOW)) until the output voltage is in regulation. From that moment the Vaux capacitor is charged by the flyback converter via the auxiliary winding. The On/Off/Data block contains a comparator for the on/off level and is active if the drain voltage is above 50 V (DC). The typical current consumption in Off mode is 40 A. The data signal changes the clamp level on the OOD pin to indicate data transfer: low clamp level for data-off and high clamp level for data-on. Vaux management The Vaux management block is active when Greeny is in the On mode. This Vaux management block senses the Vaux voltage and determines the state of Greeny: startup or normal operation. During startup the following circuits are active: On/Off/Data section, Reference block (partial), Vaux management, Temperature protection and the Startup current source. handbook, halfpage Reference block The reference block contains a bandgap circuit which determines all the accurate and temperature independent reference voltages and currents. It defines the voltage detection level for the primary current comparator and it defines the voltage at the Ref pin. The value of the reference resistor determines the burst frequency, the switching frequency and the leading edge blanking time. operation Temperature protection IVaux Istart 12 V 16 V UVLO Vstart The temperature protection circuit senses the chip temperature using a proportional to absolute temperature voltage (Vptat) generated in the reference block. If the chip temperature exceeds 140 C the power switch and the startup current source are disabled. When the chip cools down below 100 C, the startup circuit is enabled again. 20 V VVaux(max) VVaux Switch oscillator startup The switch oscillator determines the switching frequency and the maximum on-time of the power switch. The maximum on-time is set at 66% of the switching period. The switching frequency is determined by the reference resistor at the Ref pin and an internal capacitor. The switching frequency can be adjusted in a range from 20 to 50 kHz, thus above the audible spectrum. MGM824 Fig.5 IVaux versus VVaux. 1998 Aug 19 7 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 Burst oscillator Modulator The burst oscillator generates a triangular wave signal for determination of the burst frequency. The burst frequency is determined accurately and temperature independent by the externally connected reference resistor RRef and burst capacitor CBt. The modulator determines the regulation level of the Vaux voltage. For a burst duty cycle from 0 to 40% the Vaux voltage is regulated to 20 V. For stable operation in burst mode a decrease in regulation voltage is integrated for a burst duty cycle above 40%. At 100% burst duty cycle the regulation voltage is 17.5 V. Gate driver The gate driver switches the power switch. The power switch is turned on at the beginning of every oscillator cycle and is turned off by the primary current comparator or by the maximum on-time. The power switch is also prevented from turning on if the Vaux voltage has reached its regulation level or in case of active over temperature protection or in case of active under voltage lockout protection. MGM826 handbook, halfpage regulation level Vaux (V) SVaux 20 17.5 Power switch The power switch is an integrated high voltage LDMOST with a Rdson of 40 , a maximum peak drain voltage of 650 V, a maximum continuous drain voltage of 500 V and a maximum drain current of 0.25 A. 0 CPVaux Primary current comparator 0 40 100 burst duty cycle (%) The primary current comparator senses the voltage across the external sense resistor RSrc which reflects the primary current. The detection level of the comparator is 0.5 V. The power switch is switched off quickly when the source voltage exceeds this detection level. The comparator has a typical propagation delay of 80 ns. If the dV/dt of the drain voltage has to be limited for EMI reasons, a capacitor can be connected between the Drn and Src pins of Greeny. The discharge current of this EMI capacitor does not flow through the sense resistor RSrc and does not activate the comparator. Fig.6 Regulation level VVaux versus burst duty cycle. Counter The power delivered to the load (auxiliary and secondary) is a function of the number of energy pulses per burst, according to the following formula: Leading edge blanking 2 1 P load = x --- x L p x I prim x f burst x N 2 To prevent the power switch from switching off due to the discharge current of the capacitance on the Drn pin a Leading Edge Blanking (LEB) circuit has been implemented. The leading edge blanking time is defined as the maximum duration time needed to discharge the capacitance at the drain of the power switch. The leading edge blanking time is determined by the reference resistor to obtain an accurate and temperature independent time. The LEB time tracks with the period time of the switch oscillator. 1998 Aug 19 Where is the efficiency, Lp is the primary inductance, Iprim is the primary peak current, fburst is the burst frequency and N is the number of pulses in one burst period. The counter counts the number of pulses in each burst period and detects if the Ndata threshold is passed. The counter state is used for the data transfer function and for the supply current tracking. 8 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 Supply current tracking For obtaining good load regulation, especially with low cost transformers, a tracking circuit is included. The tracking circuit makes the supply current of Greeny a function of the secondary load. This makes the voltage drop across the series resistance of the auxiliary winding proportional to the voltage drop across the series resistance of the secondary winding. Therefore, the secondary output voltage tracks with the Vaux regulation voltage. The tracking starts at a counter state of 28. For a counter state from 28 up to 112 (typical values) the supply current of Greeny rises linearly with the counter state according to the following formula (see Fig.7). I Vaux = k tracking x N For counter states of 112 and higher the supply current remains on its maximum value. MGM825 handbook, I halfpage Vaux (mA) 6.7 IVaux(HIGH) 1.7 IVaux(LOW) 28 Ndata 56 112 counter state Fig.7 IVaux versus counter state. 1998 Aug 19 9 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 DESIGN EQUATIONS Burst oscillator Primary peak current The power threshold for data transfer is determined by the burst frequency, according to the following formula: The primary peak current is determined by the sense resistor RSrc and may be calculated as shown below: 2 1 P data = x --- x L p x I prim x f burst x N data 2 V detect R Src = --------------I prim The power ratio between Pdata and Pout(max) is therefore: f burst x N data P data ---------------------- = ------------------------------f switch P out(max) MINIMUM VALUE OF RSrc The maximum drain current is 0.25 A, this results in a minimum value for resistor RSrc of 2.0 . The desired Pdata/Pout(max) ratio determines the burst frequency. For example, when the desired Pdata/Pout(max) ratio is 0.5 then the burst frequency has to be 450 Hz at 50 kHz switching frequency. The burst frequency can be adjusted by the reference resistor RRef and the burst capacitor CBt as shown below: Switch oscillator The maximum output power of the converter is a function of the switching frequency, provided that the converter operates in discontinuous conduction mode. P out(max) 1 f burst = ---------------------------------------------k burst x R Ref x C Bt 2 1 = x --- x L p x I prim x f switch 2 Where is the efficiency, Lp is the primary inductance, Iprim is the primary peak current and fswitch is the switching frequency. MINIMUM VALUE OF CBt The minimum value for capacitor CBt is 3.3 nF. The switching frequency can be adjusted between 20 and 50 kHz by the reference resistor RRef: handbook, halfpage MGM827 900 1 f switch = --------------------------------k switch x R Ref fswitch = 50 kHz fburst (Hz) RANGE OF RRef VALUES The minimum value for resistor RRef is 24 k, the maximum value is 62 k. 450 fswitch = 20 kHz Leading edge blanking The leading edge blanking time is determined by the reference resistor RRef as shown below: 180 t LEB = t constant + ( k LEB x R Ref ) 0 0 The leading edge blanking time consists of a constant time and a time which tracks with the period time of the switch oscillator 1998 Aug 19 0.5 1 Pdata/Pout(max) Fig.8 fburst versus Pdata/Pout(max). 10 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). All voltages are referred to ground. Positive currents flow into the IC. All pins not mentioned in the voltage list are not allowed to be voltage driven. SYMBOL PARAMETER MIN. MAX. UNIT Voltages -0.4 +650 V VSrc -0.4 +12 V VVaux -0.4 +24 V VBt -0.4 +5 V IDrn 0 0.25 A ISrc 0 0.25 A IOOD -1 +5 mA IRef -1 +0 mA IBt -1 +0.05 mA VDrn commutation voltage peak: Vin + Vzener Currents Power and temperature Ptot total power dissipation, Tamb < 70 C - 0.7 W Tj junction temperature -10 +140 C Tstg storage temperature -40 +150 C Tamb operating ambient temperature -10 +70 C THERMAL CHARACTERISTICS SYMBOL Rth(j-a) 1998 Aug 19 PARAMETER CONDITIONS thermal resistance from junction to ambient 11 in free air VALUE 96 UNIT C/W Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 CHARACTERISTICS Conditions unless otherwise specified: -10 C <Tj < 80 C, RRef = 24 k - 0.1%; 12 V < VVaux <20 V. All voltages are referred to ground. Positive currents flow into the IC. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT On Off Data section Von/off on/off level Greeny 0.4 0.7 0.9 V Vdata(off) data off level 20 A < IOOD < 100 A 0.9 1.3 1.6 V Vdata(off) data off level IOOD = 2.5 mA 1.4 1.7 2.0 V Vdata(on) data on level 20 A < IOOD < 100 A 3.5 4.0 4.5 V Vaux management Vstart start voltage 15 16 17 V UVLO Under Voltage Lockout 11.3 12 12.7 V Startup current source Istart startup current, Vaux pin VVaux = 0 V, VOOD > 0.9 V -3.0 -2.2 -1.5 mA Istart startup current, Vaux pin VVaux = 8 V, VOOD > 0.9 V -2.4 -1.8 -1.2 mA Istart startup current, Vaux pin VVaux = 15 V, VOOD > 0.9 V -1.9 -1.3 -0.8 mA IDrn(on) drain current during startup VVaux = 0 V, VOOD > 0.9 V 1.8 2.6 3.4 mA IDrn(off) drain current in Off mode VOOD < 0.4 V, VDrn = 300 V - 40 100 A 1.18 1.23 1.28 V Reference block VRef reference voltage Temperature protection Tprot thermal shutdown 130 140 150 C Thys thermal hysteresis 35 40 45 C Switch oscillator kswitch switch oscillation constant 0.67 0.82 1.00 s/k cy(max) maximum switch duty cycle 60 66 72 % burst oscillation factor 7.0 7.5 8.1 number of current pulses for data transfer 50 56 62 IDrn(off) + 100 A 650 - - V Burst oscillator kburst Counter Ndata Power switch VBD breakdown voltage Rdson on resistance Tj = 25 C, IDrn = 80 mA 25 40 55 tf fall time VDrn = 300 V, Rdr = 2 k - 50 - ns tr rise time VDrn = 300 V, Rdr = 2 k - 100 - ns 1998 Aug 19 12 Philips Semiconductors Preliminary specification Greeny; GreenChip SYMBOL PARAMETER TEA1501 CONDITIONS MIN. TYP. MAX. UNIT Comparator Vdetect primary peak detection level tPD propagation delay dVsource/dt = 0.5 V/s 0.47 0.50 0.53 V - 80 - ns Leading edge blanking tconstant constant part of the LEB time, independent of Rref 100 250 400 ns kLEB LEB time constant 4 5 6 ns/k 19 20 21 V 37 40 43 % 34 42 50 mV/% - -0.1 - V 1.2 1.7 2.5 mA Modulator VVaux(max) maximum VVaux non-compensation CPVaux compensation point SVaux slope of VVaux(max), VVaux(max)/(100% - CPVaux) Voffset offset voltage on VVaux(max) at compensation point burst < CPVaux burst < CPVaux Supply current tracking N < 12Ndata IVaux(LOW) low supply current non-tracking ktracking tracking constant 48 60 72 A IVaux(HIGH) high supply current non-tracking N > 2Ndata 5.4 6.7 8.0 mA QUALITY SPECIFICATION Quality according to SNW/FQ-611 part E. The ESD voltage according to the Human Body Model is limited to 1200 V for the Drn pin. 1998 Aug 19 13 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 When the switch S1 is opened the voltages on the OOD pin of Greeny and the OOB pin of the GreenChip are 0 V. The power supply and the power on/off indicator (LED) are switched off immediately and the power supply is in the Off mode again. LOW POWER STANDBY APPLICATION Greeny can operate as a stand alone low power supply or as a standby power supply incorporated in a main SMPS. Together with a GreenChip TEA1504 a power supply with ultra low standby power can be built where Greeny supplies the microprocessor with the power on/off indicator and the GreenChip controls the main power supply during normal operation. Power supply in Standby mode When switch S1 is closed Greeny is in the On mode and supplies the microprocessor and the power on/off indicator. The microprocessor controls the state of switch S2. The power supply is in the Standby mode when switch S2 is open. Operation modes The power supply with a Greeny TEA1501 and a GreenChip TEA1504 can be in three different modes, according to the state of switches S1 and S2 (see Fig.9). Table 1 Operation modes of power supply S1 S2 OPERATION MODE Open Open or Closed Greeny is in Off mode, GreenChip is in Off mode, Power supply is in Off mode. Closed Open Greeny is On mode, GreenChip is in Off mode, Power supply is in Standby mode. Closed The output power of Greeny is determined by the microprocessor and is below the Pdata level when switch S2 is open. The clamp level on the OOD pin of Greeny is the data-off level with a typical value of 1.3 V which is below the on/off level of the GreenChip which has a typical value of 2.5 V. The GreenChip remains in Off mode. Closed Power supply in Normal operation mode The power supply changes its operation mode from Standby to Normal operation by closing the switch S2. The switch S2 is placed at the isolated secondary side of the Greeny and controls, via the data transfer function of Greeny, the operation mode of the power supply. Greeny is in On mode, GreenChip is in On mode, Power supply is in Normal operation mode. When the microprocessor closes switch S2 the output power of Greeny is increased. The output power exceeds the Pdata level and the clamp level on the OOD pin of Greeny is set to data-on level with a value of 4 V. The voltage on the OOB pin of the GreenChip is above its on/off level of 2.5 V and the GreenChip starts up. Power supply in Off mode The power supply can be switched on and off by means of the functional switch S1. This functional switch replaces the generally used high voltage mains switch. The power supply is in Off mode if the switch S1 is open. The power supply enters Normal operation mode, Greeny supplies the microprocessor and the GreenChip supplies the main load. If the switch S1 is closed the voltage applied on the OOD pin of Greeny is above the on/off level (0.7 V) and Greeny starts up, the power supply enters the Standby mode or the Normal operation mode. 1998 Aug 19 14 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 APPLICATION DIAGRAM WITH GREENY TEA1501 AND GREENCHIP TEA1504 handbook, full pagewidth (1) GreenChipTM output S1 OOB Vin Dem n.c. n.c. n.c. Gnd TEA1504 n.c. Driver Isense Vctrl Vaux Iref DS Greeny output Src Drn OOD n.c. Bt Ref TEA1501 S2 MICROPROCESSOR Gnd Vaux (1) MGM822 (1) Secondary earthing points are isolated from their primary earthing points. Fig.9 Application diagram with greeny TEA1501 and GreenChip TEA1504. 1998 Aug 19 15 LED Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 PACKAGE OUTLINE DIP8: plastic dual in-line package; 8 leads (300 mil) SOT97-1 ME seating plane D A2 A A1 L c Z w M b1 e (e 1) b MH b2 5 8 pin 1 index E 1 4 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 min. A2 max. b b1 b2 c D (1) E (1) e e1 L ME MH w Z (1) max. mm 4.2 0.51 3.2 1.73 1.14 0.53 0.38 1.07 0.89 0.36 0.23 9.8 9.2 6.48 6.20 2.54 7.62 3.60 3.05 8.25 7.80 10.0 8.3 0.254 1.15 inches 0.17 0.020 0.13 0.068 0.045 0.021 0.015 0.042 0.035 0.014 0.009 0.39 0.36 0.26 0.24 0.10 0.30 0.14 0.12 0.32 0.31 0.39 0.33 0.01 0.045 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT97-1 050G01 MO-001AN 1998 Aug 19 EIAJ EUROPEAN PROJECTION ISSUE DATE 92-11-17 95-02-04 16 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 SOLDERING Introduction 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. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our "Data Handbook IC26; Integrated Circuit Packages" (order code 9398 652 90011). Soldering by dipping or by wave The maximum permissible temperature of the solder is 260 C; solder at this temperature must not be in contact with the joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. Repairing soldered joints Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 C, contact may be up to 5 seconds. 1998 Aug 19 17 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 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. 1998 Aug 19 18 Philips Semiconductors Preliminary specification Greeny; GreenChip TEA1501 NOTES 1998 Aug 19 19 Philips Semiconductors - a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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No. 5, 80640 GULTEPE/ISTANBUL, Tel. +90 212 279 2770, Fax. +90 212 282 6707 Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7, 252042 KIEV, Tel. +380 44 264 2776, Fax. +380 44 268 0461 United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes, MIDDLESEX UB3 5BX, Tel. +44 181 730 5000, Fax. +44 181 754 8421 United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409, Tel. +1 800 234 7381 Uruguay: see South America Vietnam: see Singapore Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD, Tel. +381 11 625 344, Fax.+381 11 635 777 For all other countries apply to: Philips Semiconductors, International Marketing & Sales Communications, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825 Internet: http://www.semiconductors.philips.com (c) Philips Electronics N.V. 1998 SCA60 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 295102/750/01/pp20 Date of release: 1998 Aug 19 Document order number: 9397 750 03371