Philips TEA1104 User's Manual
Contents
1. ol 2 NTC A OSCILLATOR A 7 MGE354 OSC Fig 1 Block diagram 1996 Feb 26 Philips Semiconductors Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers PINNING SYMBOL PIN DESCRIPTION ground negative temperature coefficient resistor input INTRODUCTION The operation of the TEA1104 TEA1104T is explained with the aid of the application diagram illustrated in Fig 7 An application note AN95085 is available describing the versatility of the TEA1104 TEA1104T An external power current source charges the batteries via an electronic switch which is controlled by the TEA1104 The TEA1104 monitors the battery voltage Fully charged batteries are detected when the battery voltage peaks In fact a voltage drop of 0 25 with respect to the top value is detected Fast charging is initiated at power on or at replaced batteries The switch is continuously on providing that all protection levels are met At battery full detection the charge current is duty cycled to reduce the average charge current to a lower level keeping the batteries fully charged but at he same time assuring long battery life In Fig 3 the battery voltage during fast charge is plotted FUNCTIONAL DESCRIPTION A block diagram of the TEA1104 TEA1104T is illustrated in Fig 1 Mode latch The Mode latch determines if the system is in the fast or in the sl2. Philips Semiconductors Objective specification Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers TEA1104 TEA1104T DIP8 plastic dual in line package 8 leads 300 mil SOT97 1 lt seating plane 5 scale DIMENSIONS inch dimensions are derived from the original mm dimensions As AIh Aa a ew max min max b by bo c D E UNIT 9 8 6 48 1 14 9 2 6 20 0 39 0 26 0 36 0 24 mm 4 2 0 51 3 2 inches 0 17 0 020 0 13 Note 1 Plastic or metal protrusions of 0 25 mm maximum per side are not included OUTLINE REFERENCES EUROPEAN VERSION IEC JEDEC EIAJ PROJECTION SOT97 1 050G01 MO 001AN E 95 02 04 ISSUE DATE 1996 Feb 26 13 Philips Semiconductors Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers 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 c
3. 4760297 Fax 380 44 4766991 United Kingdom Philips Semiconductors LTD 276 Bath Road Hayes MIDDLESEX UB3 5BX Tel 0181 730 5000 Fax 0181 754 8421 United States 811 East Arques Avenue SUNNYVALE CA 94088 3409 Tel 800 234 7381 Fax 708 296 8556 Uruguay Coronel Mora 433 MONTEVIDEO Tel 02 70 4044 Fax 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 417021 1100 02 pp16 Document order number Date of release 1996 Feb 26 9397 750 00692 Lott make things bett S PHILIPS
4. GND OSC Vref MGE357 Fig 6 Basic application diagram MGE358 Fig 7 Application diagram 1996 Feb 26 11 Philips Semiconductors Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers PACKAGE OUTLINES SO8 plastic small outline package 8 leads body width 3 9 mm pin 1 index f Objective specification TEA1104 TEA1104T at A a e E gt gay F S He A2 Em 2 5 a gt detail X L scale DIMENSIONS inch dimensions are derived from the original mm dimensions SOT96 1 UNIT A1 A2 A3 bp c D E2 e He 0 10 0 36 0 25 5 0 4 0 0 19 4 8 3 8 6 2 5 8 inches 0 0100 0 20 0 16 0 0075 0 19 0 15 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 OUTLINE VERSION REFERENCES IEC JEDEC EIAJ EUROPEAN PROJECTION ISSUE DATE SOT96 1 076E03S MS 012AA ETO 95 02 64 97 05 22 1996 Feb 26 12
5. TIME OUT e g 111 min set Tmax 9 48 C Tmin 9 20 C circuit active Vpat lt 0 81 V or That lt Tmin or That gt Tmax note 1 indication note 2 FULL FAST 28 OFF blinks 0 81 V lt Vhat lt 3 6 V and Tmin lt That lt Tmax note 5 note 3 stop charge total reset open battery FAST charge set Tout off 9 55 C dual LED indication yes FULL FAST OFF__OFF FULL FAST O amp OFF ON AVpat 0 25 and tdis gt 3 TO Objective specification TEA1104 TEA1104T 1 Vpat lt 0 81 V due to empty or flat battery application see Fig 6 inhibit via pin Vpat 4 Release via reset 5 Tmin Vutco 22 V Tmax Vutc lt 1 V Tout oft Vutc lt 0 81 V 2 For single LED application see Fig 7 for dual LED 3 Vbat gt 3 6 V due to system occurrence or an external battery is FULL trickle charge last 40 note 4 yes dual LED indication Ss blinks yes FULL FAST ON OFF Fig 5 Flow chart of the TEA1104 MGE359 1996 Feb 26 Philips Semiconductors Objective specification Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers TEA1104 TEA1104T LIMITING VALUES In accordance with the Absolute Maximum Rating System IEC 13
6. battery low protection modes Temperature protection block Temperature sensing is achieved by using a cheap thermistor Two temperature windows are built in If the temperature at power on reset is above the maximum temperature protection level the trickle charge current is active The same applies for temperatures below the minimum temperature Fast charging starts when the temperature is in between the minimum and the maximum temperature levels If the temperature is between the maximum and minimum temperature at power on reset the fast charge current level is active If the temperature sinks below the minimum temperature level again the trickle charge level is active At rising temperature the fast charge current is latched off at the cut off temperature level To avoid switching on and off with temperature a hysteresis is built in for low temperature level If the temperature protection is not necessary pin Negative Temperature Coefficient resistor NTC must be connected to pin Rrer Battery low protections When the battery voltage is less than 0 81 V the circuit assumes that there are short circuited batteries and the charge current is reduced to the trickle charge level If the batteries are flat the trickle charge current is able to raise the battery voltage within an acceptable period of time after which fast charging starts Philips Semiconductors Cost effective battery monitor and fast Objective specif
7. 4 note 1 SYMBOL PARAMETER CONDITIONS MIN MAX UNIT Vp supply voltage 0 5 13 2 V oo LED output voltage pin 8 0 5 Vp V negative temperature coefficient resistor input voltage pin 2 Vi osc oscillator input voltage pin 7 Vi bat battery input voltage pin 4 VRret reference resistor voltage pin 5 Isource output source current loLED LED output current lRref reference resistor current lbat battery current Vp supply current Prot total power dissipation Tamb 70 C TEA1104 TEA1104T Tamb operating ambient temperature Tmax maximum operating junction temperature storage temperature 150 Note 1 All voltages are measured with respect to ground positive currents flow into the IC The voltage ratings are valid provided that other ratings are not violated current ratings are valid provided that the power rating is not violated QUALITY SPECIFICATION In accordance with SNW FQ 611 part E The numbers of the quality specification can be found in the Quality Reference Handbook The handbook can be ordered using the code 9397 750 00192 1996 Feb 26 8 Philips Semiconductors Objective specification Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers TEA1104 TEA1104T CHARACTERISTICS Vp 10 V Tamb 25 C Rre 33 kQ Cosc 1 nF unless otherwise specified SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT Supply Vp supply vol
8. 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 Philips Semiconductors Objective specification Cost effective battery monitor and fast TEA1104 TEA1104T charge IC for NiCd and NiMH chargers 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
9. INTEGRATED CIRCUITS DATA SHEET TEA1104 TEA1104T Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers Objective specification 1996 Feb 26 File under Integrated Circuits IC03 Philips PHILIPS Semiconductors DH l LI Philips Semiconductors Objective specification Cost effective battery monitor and fast TEA1104 TEA1104T charge IC for NiCd and NiMH chargers j FEATURES APPLICATIONS e Accurate detection of fully charged batteries by e Portable telephone currentless peak voltage sensing e Portable computer Switch over from fast to safe trickle charge current at 4 battery full detection Portable audio e Portable video Fast charge termination back up by maximum time and maximum temperature detection GENERAL DESCRIPTION Several trickle charge drive possibilities for mains isolated and non mains isolated systems The TEA1104 is manufactured in a BICMOS process e Battery checking to protect against short circuited and intended to be used as a battery monitor circuit in charge open batteries systems for NiCd and NiMH batteries It is especially designed for cost effective compact consumer e Battery monitor allows recharging of different battery applications packs in the same charger The circuit is able to detect fully charged batteries by currentless battery voltage sensing Several output drive functions are available to control the reduced trickle charge current to keep the bat
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11. 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 Feb 26 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 5 floor Suite 51 CEP 04552 903 SAO 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 Santa Maria 0760 SANTIAGO Tel 02 773 816 Fax 02 777 6730 China Hong Kong 501 Hong Kong Industrial Technology Centre 72 Tat Chee Avenue Kowloon Tong HONG KONG Tel 852 2319 7888 Fax 852 2319 7700 Colombia IPRELENSO LTDA Carrera 21 No 56 17 77621 BOGOTA Tel 571 249 7624 571 217 4609 Fax 571 217 4549 Denmark Prags Boulevard 80 PB 1919 DK 2300 COPENHAGEN S Tel 45 32 88 26 36 Fax 45 31 57 19 49 Finland Sinikalliontie 3 FIN O2630 ESPOO Tel 358 0 615 800 Fax 358 0 61580 920 France 4 Rue du Port aux Vins BP317 92156 SURES
12. an be found in our IC Package Databook order code 9398 652 90011 DIP 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 T stg 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 so REFLOW SOLDERING Reflow soldering techniques are suitable for all SO packages 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 1996 Feb 26 Objective specification TEA1104 TEA1104T Several techniques exist for reflowing f
13. battery voltage will now be sensed in a currentless way Timer oscillator The oscillator has a sawtooth shape The period time is defined by tose K x Rret X Cosc The oscillator frequency is used in the timer block In this block several important signals are created Time out for protecting the fast charge process in time Time out is normally chosen to be 25 longer than the associated fast charge time So for a one hour charge time time out 1 25 hours The relationship with the oscillator period time is Time out 2 exp28 x tosc The duty factor in the trickle charge mode The duty factor is fixed to 4o meaning that the average ltrickle 140 X last ton 3 4 Xx 2 exp9 x tosc tot 2 exp14 x tosc 1996 Feb 26 Objective specification TEA1104 TEA1104T e The battery voltage is sensed each cycle time The cycle time is defined as Teycle 2 exp16 x tosc e The inhibit time is the time that the charger current is disabled after which the battery voltage is sensed in a currentless way tinhibit 10 X tose Battery sampling takes one oscillator period for each cycle interval tsample tosc e The disable time is present to correct start up with flat or polarized batteries During the disable time the battery full detection is not active tdisable 2 exp 5 x time out The timer is reset by battery full detection but is on hold during the temperature and
14. components selection is given based on an example of a 1 hour charger for a 4 cell NiCd or NiMH battery pack The basic application diagram as illustrated in Fig 6 which is based on the application diagram illustrated in Fig 7 with some additional components a 2 LED charge status indication has been provided For charging a battery within one hour the charge current rating should be as follows Required minimum charge current battery capacity x 1 2 charge time Therefore for a 1 Ah battery the external charge current supply has to deliver at least 1 2 A TEA1104 settings The fast charge back up timer period time out has to be set in relation to the expected maximum charge time Normally a safety back up time is chosen approximately 25 longer than the maximum expected fast charge time For a one hour charger the time out period can be set to 1 25 h Time out relationship with the oscillator repetition time is as follows tosc time out h x 3600 2 exp28 tosc 17us for time out 1 25 h tosc is set with the combination of Cosc and Rre where tosc 0 93 x Rret X Cosc Rref can be chosen between 13 and 120 kQ but a 27 kQ resistor is recommended The oscillator capacitor can be calculated which is 668 pF the nearest higher practical value is 680 pF 1996 Feb 26 10 Objective specification TEA1104 TEA1104T In the trickle charge mode the LED output will pulsate with a repetition time trickle 2 Xp14 x to
15. ication TEA1104 TEA1104T charge IC for NiCd and NiMH chargers Output drivers In non mains isolated systems the current source can be switched via the auxiliary winding see Fig 6 using the Several output drive possibilities are supported by the TEA oe RA 140X lugs TEA1104 to limit the fast charge current and to indicate ae power plugs the mode that the charge is in In the application section an example is shown driving two In mains isolated systems output drive current is available for a bipolar or MOS switching device Moreover current regulators can be driven see Fig 4 LEDs that are indicating fast charging protection during fast charging full status and removed batteries It is also possible to output the same information via one LED only Vbat MGE355 full detection _ ee elesle fast charge fast db trickle charge Ifagt 40 Fig 3 NiCd battery characteristics during a 1 25C charge cycle i output output l A er a O f L t9 E gt ID I y Ag L A Pa L7 z y LED LED LED as TEA1104 K TEA1104 K TEA1104 K WT 7z 77 V7 T77 MGE356 Fig 4 Output drivers 1996 Feb 26 Philips Semiconductors Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers clamp at 11 5 V IDDmax 25 mA circuit active total reset logic set
16. lifton KARACHI 75600 Tel 021 587 4641 49 Fax 021 577035 5874546 Philips Semiconductors Philippines PHILIPS SEMICONDUCTORS PHILIPPINES Inc 106 Valero St Salcedo Village P O Box 2108 MCC MAKATI Metro MANILA Tel 63 2 816 6380 Fax 63 2 817 3474 Portugal PHILIPS PORTUGUESA S A Rua dr Ant nio Loureiro Borges 5 Arquiparque Miraflores Apartado 300 2795 LINDA A VELHA Tel 01 4163160 4163333 Fax 01 4163174 4163366 Singapore Lorong 1 Toa Payoh SINGAPORE 1231 Tel 65 350 2000 Fax 65 251 6500 South Africa S A PHILIPS Pty Ltd 195 215 Main Road Martindale 2092 JOHANNESBURG P O Box 7430 Johannesburg 2000 Tel 011 470 5911 Fax 011 470 5494 Spain Balmes 22 08007 BARCELONA Tel 03 301 6312 Fax 03 301 42 43 Sweden Kottbygatan 7 Akalla S 164 85 STOCKHOLM Tel 0 8 632 2000 Fax 0 8 632 2745 Switzerland Allmendstrasse 140 CH 8027 ZURICH Tel 01 488 2211 Fax 01 481 77 30 Taiwan PHILIPS TAIWAN Ltd 23 30F 66 Chung Hsiao West Road Sec 1 Taipeh Taiwan ROC P O Box 22978 TAIPEI 100 Tel 886 2 382 4443 Fax 886 2 382 4444 Thailand PHILIPS ELECTRONICS THAILAND Ltd 209 2 Sanpavuth Bangna Road Prakanong Bangkok 10260 THAILAND Tel 66 2 745 4090 Fax 66 2 398 0793 Turkey Talatpasa Cad No 5 80640 GULTEPE ISTANBUL Tel 0212 279 27 70 Fax 0212 282 67 07 Ukraine Philips UKRAINE 2A Akademika Koroleva str Office 165 252148 KIEV Tel 380 44
17. nitor and fast charge IC for NiCd and NiMH chargers Open battery protection When the rechargeable battery is removed the output voltage Vhat will rise to a high level The open battery protection block will detect this voltage and the charge current will be switched off A digital filter prevents false open battery protection The open battery signal Vbat gt 3 6 V must be present for a duration of at least 4 clock pulses Battery monitor One or two cell packs can be connected directly to Vhat battery connection without an external resistor divider At larger cell packs the battery voltage must be scaled down to a voltage range of 0 81 to 3 6 V It is also possible to take a tap on the chain of batteries Battery full is recognized by voltage peak detection Vpeak Meaning a decrease of 0 25 typ with respect to the top value Keeping in mind a battery voltage range of 0 81 to 3 6 V and an accuracy of 10 at Vbat 2 4 V for battery full detection means that the internal ADC has to be 13 bits Several filters are included to prevent false full detection The series resistance of the battery and battery connection can cause battery voltage fluctuations and therefore it is necessary to stop the charging before sensing this is called the inhibit time This will be performed automatically via the regulation output pin LED The charging is stopped for ten oscillator periods at the end of which sampling is performed The
18. or 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 Preheating is necessary to dry the paste and evaporate the binding agent Preheating duration 45 minutes at 45 C WAVE SOLDERING Wave soldering techniques can be used for all SO packages if the following conditions are observed e A double wave a turbulent wave with high upward pressure followed by a smooth laminar wave soldering technique should be used e The longitudinal axis of the package footprint must be parallel to the solder flow e The package footprint must incorporate solder thieves at the downstream end 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 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 A mildly activated flux will eliminate the need for removal of corrosive residues in most applications REPAIRING SOLDERED JOINTS Fix the component by first soldering two diagonally opposite end leads Use only a low voltage soldering iron less than 24 V applied to the flat part of the lead
19. ow charge mode e Fast charge is active at power switch on and battery connected temperature between minimum and maximum value battery insert 1996 Feb 26 4 Objective specification TEA1104 TEA1104T U LED OSC TEA1104 Vp Fret MGE353 Fig 2 Pin configuration e Trickle charge is active if battery full is detected maximum time is exceeded maximum cut off temperature is exceeded after the initial phase Supply block For correct start up the IC supply current is limited to 35 uA typ until the start up voltage of 6 4 V is reached standby mode Thereafter the operating supply voltage Vp has to be within the window of 5 45 to 11 5 V meaning that there is no need for an external voltage regulator to supply the IC The supply block delivers the following outputs e With the help of an external resistor pin Rres a reference current is obtained which defines the accuracy of all IC timing characteristics Externally available 4 25 V stabilized voltage source Vsource This source is used internally to supply a large part of the circuit and can be used to set the NTC biasing and to supply other external circuitry with a maximum current of 1 mA Protection information is provided via Vs to design a dual LED indicator e Power on reset pulse resets all digital circuitry after a start or restart due to an interrupted Vs Philips Semiconductors Cost effective battery mo
20. sc 0 28 s The duty factor of the pulse is 2 5 of trickle This duty factor also applies to the charge current as the charge current switch is driven by the LED output Therefore the average trickle charge current is ltast 40 The Vpat input can be adapted to the battery voltage via the resistor dividers R1 and R2 When an NTC thermistor has been incorporated into the battery the minimum maximum and cut off temperature levels can be set with the resistors R3 and R4 For an NTC with a common sensitivity of 3965 and adjustment resistor values R3 13 kQ R4 20 kQ the minimum maximum and cut off temperatures will be 5 42 and 50 C respectively The flow chart of the TEA1104 TEA1104A is given in Fig 5 The load state of the batteries can be displayed by one or two LEDs The flow chart is not to be regarded as sequential Each mode of operation is a purely separate continuous process Table 1 Dual LED indication CHARGER F MODE LED Fast charging low LED 1 LED 2 on Fast charging on off protection Full trickle charging low high low high Battery open high Philips Semiconductors Objective specification Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers TEA1104 TEA1104T Vp 6 5 to 12 Vo i gt O O 4 LED 2 FULL y wv 100 47 current a kQ ka i supply cells Vs BC548 TEA1104 L Bc548
21. tage 5 45 11 5 V Velamp clamping voltage lclamp 25 MA 11 5 12 8 V Vpa power down voltage level 4 65 5 05 5 45 V 45 5 A V V Istart start up current Vp 4V is 0 i Vs stabilized voltage ls 1mA 4 03 4 25 4 46 VRref voltage range at reference resistor IRref 20 uA TCvret temperature coefficient of the Tamb 0 to 45 C ppm K reference voltage current range of the reference resistor Temperature related input NTC input voltage level for detecting temperature cut off maximum input voltage level for detecting temperature cut off minimum input voltage level for detecting temperature cut off input current Vato 1 5 V Output drivers LED pulse duty factor LED saturation voltage ILED sat 15 MA IL LED LED input leakage current Viep 15 V Battery monitor li bat input battery current Vbat 2 4 V 1 Vhat voltage range for peak detection 0 81 AVbat Vbat Peak detection level with respect to Vbat 2 V top level Tj temperature range of peak detection Protections BAT Mian sey cir ns f pe j Vbat h high level battery protection voltage 3 5 3 6 4 5 V Oscillator k correction factor 0 84 0 93 1 02 frequency range pt de ho je 1996 Feb 26 9 Philips Semiconductors Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers APPLICATION INFORMATION A guideline for the settings of TEA1104 and its external
22. teries full with maximum life Few low cost external components required expectations Dual LED indicator provision External regulator not required because of large input voltage range QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT supply voltage 5 45 11 5 supply current outputs off voltage range of battery full detection a ra a The battery full detection is backed up by two independent mechanisms to make the system fail safe maximum time and maximum temperature voltage peak detection level with respect to top value battery monitor input current battery voltage protection low battery voltage protection high fosc oscillator frequency 10 100 kHz ORDERING INFORMATION e PACKAGE NUMBER NAME DESCRIPTION VERSION TEA1104 plastic dual in line package 8 leads 300 mil TEA1104T plastic small outline package 8 leads body width 3 9 mm 1996 Feb 26 2 Philips Semiconductors Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers BLOCK DIAGRAM Objective specification TEA1104 TEA1104T Fret SUPPLY battery high POR protection Q FILTER SAMPLE AND HOLD battery low protection fast LED trickle CONTROL GND BATTERY FULL DETECTOR A m zl trickle TEA1104 TEA1104T
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