TEA1088T PHILIPS | Alldatasheet
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PHILIPS INTERNATIONAL 4LE D Ea 7110826 0021264 4 EEPHIN . F-S8-U--3/ i TEA1088T - status _|Proauctsreateaton_| SIVIPS battery charger control circuit FEATURES GENERAL DESCRIPTION open-circuit, short-circuit or faulty i i ier if batteries. ° ais contro! creat factor m revel ve contre! croult i The device is primarily designed to ne f ton y b tte a een nden nit use iN 2 control two batteries in series. The regu ation P attery charger an ‘ormoniior number of cells can be extended by emitter drive for power switch ‘system. The device incorporates all using ata current mode control the control and protection functions 9 atep. . dynamic primary current limiting that are required in a switched-mode (.) © Charge control circuit power supply used to deliver charge accurate output current setting current. The circuit also achieves fast, two stages, charge mode direct drive to the emitter of the two hours fast charge protection SMPS power transistor. limit The battery monitor circuit includes a trickle charge mode for full reliable battery-full detector which batteries controls the switch-over from fast © Voltage control circuit charge to trickle charge mode and, in voltage regulation for connected the discharge made, a battery-LOW mains and load detector with two outputs for an LED © Battery monitor circuit or buzzer warning indicator, ey accurate fully charged detection Protections are provided against 8 (- dV phenomenon) ~ LOW-level detection and indication protection against faulty batteries, Short or open-circuit ORDERING INFORMATION data output for condition of charge processing EXTENDED [ __— PACKAGE ( very LOW stand-by current, TYPE NUMBER | PINS | PIN POSITION MATERIAL| CODE | <10 A TEA1088T S016 SOT162A NE am eR ae IS REED PRE ARIE CGE ISCAS OR A ES CE an t | %. panne Se ee a we | | Phillips Gemiteomdluctene | PHILIDS Ce
PHILIPS INTERNATIONAL 4YLE D GM 7110826 OO212b5 & EEPHIN T-58-11-31 Product specification SMPS battery charger control circuit TEA1088T ee . QUICK REFERENCE DATA CONDITION [MIN [T¥P._|_WAX._[_UNIT [Ve | supplyvoltage charge 8 T- tO V| [ls | supplyeurent [charge _|- | [19 | ma] [io | supolycurent | dischargs____[-__[- [12 ma] [io standbycurrent Pt a [| SMPS transistorbias ourent | ___|-J-@ J» | ma] Vo-V3 saturation voltage emitter Ip =350 mA 1.4 Vv switch [Vio_____[ batteryvoltagerange _—[@calis 8 T= ao TV Via threshold battery LOW 1.17 1.33 Vv indication [tars | ueDoutputcurents __[Vinesosv [21 [ao fsa [ma Vi0 voltage range of battery full 4.3 Vv detection [vio_____| tesholaforfuindication [f= _[-23 [= rw] April 1991 2
PHILIPS INTERNATIONAL YE D MM 7110826 O0212bb & ESPHIN 7-58-11-31 Product specification SMPS battery charger control circuit TEA1088T oe SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSee initialization. take over test supply input supply input 2HOUR -dV ct bias COUNTER CIRCUIT CIRCUIT output : s 2 collactor CONTROL LOGIC it a ee a 2, Fup |@ pn FLOP TEA1088T emitter PWM switch 1800 o R limit current sensor oscillator RC 16 16-BIT Viet 2kHz 64 Hz CURRENT PROTECTION |, battery low sarge Pf RR a ty sensor input INDICATOR battory low . battery voltage 10 z loop stabilizer! ™ [. CU CS™ _ Musa2s ground load state charge current smoothing switch sensor input capacitor Fig.1 Block diagram. ' April 1991 3
EOEOeeeEeEeEeEeEeEeEeEeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee SS... PHILIPS INTERNATIONAL 4YLE D BM 7120826 0021267 T EMPHIN q-$8-11-31 . Product specification SMPS battery charger control circuit TEA1088T PINNING SYMBOL | PIN | DESCRIPTION Bias output [oi | 2 | eolector BWA switch 5 [rT | 3 | emitter PWM switch/limit current sensor o2 Li] [16] osc [vic |__4_[ intatization supply input 0: fF fs] rest | 7 |loopstabilizersiowstat | 7 “ [MCS 7 loop stabilizer/slow start ice} over L2 [in | 8 _| chargecurrent sense input ono [5] [12] Ls [Vac | 40 | battery votage input ° battery LOW sense input " [2 Yao load state switch tn [8] 12] Vin battery LOW LEDT output a battery LOW LED2 output TEST | 15 |testpin ‘nn Fig. . [osc | 16 | oscilator RC connection 9.2 Pinning olagram FUNCTIONAL DESCRIPTION is only dissipative. The pin description of the device During charging the battery voltage refers to external components as is carefully sampled every second, ir / Illustrated in the test circuit diagram te SNPS Is ‘nen stopped (9 Prevent | (Fig.9). In this circuit the TEAOgsT Tene eae ain | directly drives the emitter of the ge, ni SMPS Darlington power transistor to succession the detector circuit sets A tebe . the trickle charge mode. provide fast switching and a wide | reverse blas SOAR, i In the discharge mode the battery | The supply output characteristics are | shown in Fig.4 and the operational LOW detector monitors the battery : cycles of the charger system are voltage and an output is given when ! shown in Fig.5 the voltage drops below a set value. | ‘o The output signals on the L1 and L2 | The battery monitor circuit includes a ale seo givenin ri ond: 6, The device ' reliable battery-full detector which also be employed purely controls switch-over from the fast monitor, this is because the monitor charge to the trickle charge mode. circuit is separate from the charge The battery-full detector employs the circuit. Figure 8 gives an application phenomenon of an increase in example. battery voltage during charge due to the conversion of charge current into stored energy and, when the battery is full, a slight decrease in voltage due to a negative temperature . coefficient when the charge current April 1901 4
. PHILIPS INTERNATIONAL 4YLE D EM 7110826 0021268 1 EMPHIN J-58-11-31 Product specification SS SMPS battery charger control circuit TEA1088T a . LIMITING VALUES In accordance with the Absolute Maximum System (IEC 134); voltage with respect to O V. SYMBOL PARAMETER CONDITIONS| MIN. | MAX. | __UNIT [Taig [storage tomperaturerange | ———S—~d 28d te Ve voltages continuous -2.0 31 Vv peak during 100 ms; - 45 Vv non-repetition Vio _ | continuous - 4.0 Vv peak during 2 ps; - 12 Vv 50 ms repetition M -5.0 15 Vv Va lg=OmA -0.5 30 v Vat Vi2 -0.5 4.0 v Ve -0.5 0.5 v Via, Via -0.5 10 Vv tay Ig currents continuous 350 mA . peak 1 us 1.0 A lasloty4 2.0 mA ha 10 mA lie batteyyLOWLEDi output [——SSSC~d «Oi [Pr [total power cissipation [res 800m THERMAL RESISTANCE SYMBOL PARAMETER [ typ. | MAX. | UNIT | [Rinja | fom junction to ambientin tree air en | April 1991 5
PHILIPS INTERNATIONAL WIE D M& 7110826 0021269 3 MPHIN 7-58-11-31 Product specification SMPS battery charger control circuit TEA1088T : a SSSSSSSSSSSSSSSSSSSSSSSSeSSSSeSeSeSSSSSSSSSESeEeEE Muazes 600 | printed-circuit board = Prot 40x 19x 1.5 mm ) re “EEE pt i tt A “EEE TT Jit tt i 25 0 8 7 125 ; Tamb (°C) Fig.3 Power derating curve. Supply (pins 4 and 6) Output stage (pins 1, 2 and 3) Dynamic primary current limit Pin 6 is the main supply input for the The PWM output stage consists of a (cycle-by-cycle) (pin 3) device if it is employed as a battery Darlington power transistor with the The primary switching current is charger. It can be fed from a DC or collector and emmitter connected to —_ sensed across an external resistor AC voltage source; the latter can be pins 2 and pin 3 respectively. The connected to the emitter of the PWM provided by a SMPS transformer current capability is 500 mA peak. output switch at pin 3. Internally, the winding. The positive value ofanAC This transistor drives a Darlington voltage on pin 3 is compared to a ! voltage has to be between 7 and31V high voltage transistor switch directly _ reference voltage which in turn is (45 V peak) while the negative values _at its emitter to ensure a large inversely proportional to the voltage restricted to-2V. reverse bias SOAR and fast difference between Var (pin 6) and | Internally, the main supply voltage Is switching. The base of the Darlington —_ Vac (pin 10). This voltage difference series regulated to approximately6V _high voltage transistor is biased bya _ reflects the input voltage of the which is available at pin 4 for current source (>1 mA) from pin 1 in system. This method compensates . connection of a smoothing capacitor. combination with an external Zener for primary current overshoot Initialization is also accomplished via _ diode and capacitor (pre-charged at _ variations with input voltage which . pin 4 by pre-charging the capacitor initialization) in order to provide alow _are caused by internal delay in the IC up to 7.5 V via a resistor from the impedance base path during and storage time in the power | system power source. At the startof switching. transistor. The voltage reference level . system operation the supply on pin6 is defined by: ) must take over. When the voltage at pin 4 drops Vret = 0.44 -5 x 10-3 x Vin/N [V] . below 3.9 V the circuit switches off where (N = transformer winding ratio) and restart occurs via initlalization. April 1991 6
PHILIPS INTERNATIONAL 4YLE D Ea 7110826 0021270 T EMPHIN T-58-11-31 Product specification SMPS battery charger control circuit TEA1088T If the sense voltage rises above Vref Pin 7 is connected directly to the Indicator outputs (pins 13 and 14) then the output is terminated every summing point of the PWM input and The indicator outputs have an open cycle. the output from both error amplifiers. collector with set current sink By connecting a capacitor between . pin 7 and pin 3, the primary current capability. When active, the output Modulator (pins 7 to 10) . generates pulses at 2 KHz. When sense voltage is added to the error ins 13 and 14 Iternating, th The PWM is connected with two signal which results in a current pin n Gre eltematng, a error amplifiers for regulation of the mode control that enhances load output generates two bursts ofthese d SMPS output current and voltage. response and control loop stability. paises i" ng ee ove. More detalle: . Voltage regulation is enabled only This capacitor also provides slow Those sk ote Oe vin when the SMPS is operative and start ata start cycle. LED an en indicators 3 . while the batteries are loaded (pin 12 . connected to ground). The current When the device is supplied via pin 6 Serial data concerning the status of feedback input, pin 8, receives the the minimum duty factor is restricted aaa current information from aresistorRs to 3% to ensure a continuous supply Circuit operation from which the in the output current loop. The from the SMPS. The maximum duty battery state-of-charge can be voltage waveform across this resistor _ factor is limited to 60%. . processed is also output from pin 13. is negative-going but is shifted to a Open or short-circuit battery output positive value by addition of avoltage _is detected via pin 10. If the voltage at Test pin (pin 15) 1g X R8 and integration with C8. (Ig is pin 10 rises above 5 V or, in the This pin must not be connected areference current from pin 8). This charging mode, remains below 2 V . | feedback voltage Is compared and during the first 4 charge minutes, the regulated to the common potential, circuit will switch off and the start-up Oscillator (pin 16) | hie on current is defined by: procedure will be resumed. AnR-C network sets th e frequen cy of | The value of the reference current Ig . tet cas the oscillator, The switching | depends on the operational state set Load identification (pin 12) frequency ofthe ee ane ah by the control block which The switch input recognizes a load oscillator Whe should be nominally ; distinguishes: connected to the output by the state 33 kHz. The capacitor is charged via of switch S1. The difference between pin 16 (flyback) and discharged by © First 17 minutes of charge la(typ.) aclosed switch or an open switch the parallel resistor. The required = 40 pA (2C) with short-circuit or flat batteries is frequency is set with R=36kQand . ¢ Proceeding charge identified if the external resistance C =560 pF. = 20 pA (1C) value of R11 + R12 is greater than © Trickle charge (on/off = 1/9) 4.2 kQ. = 20 HA (0.1C) | © Current limit at voltage regulation =48nA Battery LOW sense (pin 11) In the voltage regulation mode the In the battery discharge mode the . battery output voltage is sensed at battery voltage is protected at pin 11 pin 10. Internally, this voltage is via a resistor divider. The input is divided by two and made available at + immune to any spurious interference pin 9, for smoothing purpose only, from the load. When the voltage level and compared with a 1.25 V drops below 1.25 V the indicator reference voltage. output at pin 13 is set. At load switch OFF (S1 open) the indicator outputs : (pin 13 and pin 14) will give alternating bursts for 4 seconds. April 1991 7
PHILIPS INTERNATIONAL 4WLE D BM 7110826 OOe2l271 1 EEPHIN 7-58-11-31 Product specification SMPS battery charger control circuit : TEA1088T 'o I ~" t state 1 1 wo ' 1 1 state 4 ! ! 1 1 1 1 1 i} 1 1 state 2 1 Pt aietetatetetaheteteted | 1 ' 1 1 I low voltage | high voltage | protection | protection 1 { ; ; ! state 3 ! a 2 25 Vo () 5 muse | Fig.4 Supply output characteristics. | April 1991 8
PHILIPS INTERNATIONAL 4YLE D BM 7110826 0021272 3 BAPHIN J-58-11-31 Product specification ee SMPS battery charger control circuit TEA1088T ee input on supply off max max -~ = charge ny igh current Ip Ig 1 votlage batery tll Viow VREG \\ on oad ott on LI indicator ee | ee L2 indicator © indicator off 1 2 3 5 6 7 44 state Kt th Ht tH vase | State 1; Boost charge. ly =2 x lz State 2; Fast charge. State 3; Trickle charge. Ig = 0.1 x la (Le. Iz pulsed with 10% duty factor at 1 Hz rate. State 4; Voltage regulation. Vo = 2.5 V; loimax) = 2.3 x lo. Fig.5 Operational cycles of the SMPS charger system. April 1991 9
PHILIPS INTERNATIONAL YE D BM 7210826 0021273 S EMPHIN 7-58-11-31 . Product specification SMPS battery charger control circuit TEA1088T State 1; Boost charge current during State 3; Trickle charge which keeps State 6; Discharge of the batteries. 17 minutes after supply turn the batteries fully charged. The monitor circuit is ‘on. The current |; is twice the This current is sufficiently activated and senses the fast charge current lp. This low not to harm the batteries battery voltage. Signal state helps completely when maintained for a long output (L1) is given when the empty batteries, possibly period. sense voltage drops below a reversed in polarity, to set value (VLow). quickly regain their charge State 4; Output voltage regulation store potential. Within the when both the charger is on State 7; By removing the load after first 4 charge minutes the and a load is applied to the state 6, both indicator battery voltage should rise batteries. This provides outputs give signals in an above 2 V otherwise direct output power to the alternating mode for 4 protection occurs by stop load even when the batteries seconds (see also Fig.6). and initialization in repeating are empty. succession. State 5; Stand-by at neither input nor State 2; Fast charge current that output. Negligible IC current proceeds until either battery (to keep the internal full is detected (-dV) ora memories active) is drawn maximum charge time of from the batteries. 2 hrs is reached. April 1991 10
PHICIPS INTERNATIONAL 4LE D MM 7110826 0021274 7 BMPHIN T-58-11-31 Product specification | — | SMPS battery charger control circuit 7 TEA1088T a CHARACTERISTICS Ve = 10 V; Vio = 2.5 V; R16 = 36 kQ; C16 = 560 pF; Tamb = 25 °C; unless otherwise specified. SYMBOL PARAMETER CONDITIONS [| MIN. | TYP. [ MAX. [ UNIT . Supply Ve take over supply 5.5 - 31.0 Vv le supply current 10 15 19 mA V4 initialization level 6.5 7.0 7.5 Vv V4 Internal supply voltage output 5.4 6.5 6.9 Vv Iq supply current Ve =0V 65 9.5 12.5 mA lio input current stand-by - 5.0 10.0 HA ~ battery discharge 6.0 9.0 12.0 mA BLI blinking 7.0 10.5 14 mA count 2 hr timer 49 78 10.8 mA charging 0.3 0.5 0.7 mA Protection circuits V4 LOW supply protection 3.0 Vv Vio minimum input voltage charge period > 1.8 Vv 4min. . Vio maximum input voltage 45 Vv Oscillator (supplied via V4 or Vio = Vp) Vie voltage level HIGH 4/5Vp - Vv Vie voltage level LOW 1/5Vp - Vv initial accuracy excluding V4=5.7V - +10.0 % external components Af frequency deviation V4 to Vio supply 1.5 3.0 % . f frequency R=36kQ; 33.0 - kHz C =560 pF ! TCr temperature coefficient of -150 - 106°C frequency BLI function | Vio input voltage range 1.8 - 4.0 Vv - V44 BLI reference voltage 117 - 1.33 Vv | TCret temperature coefficient ~250 - +250 10°6/°C | 7 reference ! o hysteresis reference voltage 2.0 3.5 6.0 mV : output . ya,14 BLI output current Vo =0.5V 21 30 39 mA | Hsly4 output currents match 0.9 1.0 11 mA V43,14 saturation voltage lo=10mA - - 200 mV ha14 leakage current Vo=4V - - 10 pA | Vi3 breakdown voltage lo=10mA 15.0 17.0 18.5 Vv | V44 breakdown voltage lo = 50 mA during 15.0 17.0 18.5 Vv . burst i344 frequency output signal - 2 - kHz 13,14 burst frequency load switch off - 1 - Hz fis14 alternating frequency load switch off - 4 : Hz -dV detector Vio minimum input level - 25 Vv Vio maximum input level 4.0 - v -dVi0 detector threshold 15 30 mV tm sampling time - - ms trep sampling repetition - - s April 1991 1 .
PHILIPS INTERNATIONAL 4LE D M@ 7110826 0021275 9 MMEPHIN 7 : qos8-11-3t . ; Product specification SMPS battery charger control circuit TEA1088T . SYMBOL PARAMETER | CONDITIONS | MIN. | T¥P._|[ MAX. | _UNIT SMPS outputs hy bias output 1.0 2.0 4.0 mA Va-Va saturation voltage Ig =350 mA 09 : 1.4 v V3 current protection threshold Ve-Vio=3V 340 425 510 mV voltage . Ve-Vio=22V 262 328 394 mV tp(V2) minimum output pulse Ve-Vio>25V 0.3 0.6 1.6 ys ta current trip delay to output V3=1.2XVthreshoid | - 0.6 - us Modulator Vi0 reference level voltage regulation 2.4 2.55 27 Vv TC temperature coefficient - +25 - 10°6/°C ) Vreference Ig reference input current fast charge -10 -20 -30 HA boost charge -20 40 -60 HA voltage regulation 26 -~46 -69 pA ratio reference current boost/fast charge 1.9 2.0 24 voltage regulator/ 1.09 1.15 1.21 boost charge . Ve reference level current regulation -10 - +10 mV V7 PWN input source current voltage level HIGH =| -6.5 -10.0 -13.5 pA PWM input sink current voltage level LOW 6.5 10.0 13.5 pA V7 maximum PWM input voltage slow start - 0.8xV4 - Vv d maximum duty factor 55 60 65 % tinh inhibit time of -dV circuit start boost charge 43 start fast charge 43 the boost charge duration 17 tte maximum fast charge time 24 Computer control interface status indication current source -490 -820 HA atLi April 1991 12 oa
PHILIPS INTERNATIONAL YLE D MM 7110826 0021276 0 MMPHIN : , qo58-11-31 ° Product specification ee SMPS battery charger control circuit TEA1088T . | — TT | B 5 on . ~ toad . | off BLI
6 Tt |
Vac | eo MT | ov . i ee es ee es = burst; 2 kHz, 75% LOW, 25% HIGH | MLAssi | Fig.6 BLI signalling scheme. April 1991 13
PHILIPS INTERNATIONAL 4YLE D MM 7110826 0021277 2 MMPHIN
6 TH58-11-31
° Product specification SMPS battery charger control circuit . °. . * TEA1088T . Vin , 7 : I | a 7 : Pwo [Y : ; current feedback ; 4 . voltage feedback I Vin OC | I 2 @4)| i ! Ge) 1 |] 7 [corn <@ ! feedback CONTROL ! : 7 | TEA1088T ; ; | voltage feedback | | . | COUPLER :
12 V battery
i og | . TEA1088T 1 @) . - ‘currant feedback voltage feedback muasa2 yd. Fig.7 Simplified charger configurations. April 1901 14 to :
PHILIPS INTERNATIONAL 4LE D M@ 7110826 0021278 4 EEPHIN : J-58-11-31 . . : . Product specification SMPS battery charger control circuit TEA1088T . an LEDI (¥) {| buzzer : Ul , T 10 13 14 . ol TEAt088T i 5 16 8 7 1 1 | abte 1 rete Fig.8 Battery monitor application. | April 1991 15
PHILIPS INTERNATIONAL 4YLE D MM 7110826 0021279 & MPHIN : 58. 1-31 eT Product specification . eee ee SMPS battery charger control circuit -. TEA1088T ; Lpr = 5 mH Vy (80 to 400 v 0c) NpiNg = 18:1 to | BYD33) | | 4 , @) BYDT4A roe ae | vr e m@ [46 4 5 3 | 8 | fa | seo Bzxe4 . nF 2 - ~ | TeAro08T st, , 7 2nF I mS Q ! test — 15, 8 ow — 22nF aa 24a ° ca 14 130014 12 10 [aa | aa 22 nF | Rit . : 2.4kQ ] RL musaa4 s1 : ' s2 Fig.9 Test circuit. Note : 1. charge = Iref x (R8/Rs) 5 With lref = 20 WA, R8 = 2 kQ. and Rg = 70 MQ, the charge current level is 570 mA which is approximately 1C for 7 . "half sub C’ cells. April 1901 16 oo ;
PHILIPS INTERNATIONAL 4LE D MM 7110826 0021280 2 BEPHIN ~ 58-11-31 : , - Product specification SMPS battery charger control circuit wet TEA1088T ; | PACKAGE OUTLINE 10.5 | ° 101 04s gol nabe . [rma] 0.35 ait i ol 11 : 25 9.35 a MOP . ga | ~\\ le .. a el pg OC | —>l[rz7] , LOG ADD Ts 7 6 5 4 3 2 1{| topview | oot 2.0 . - max ; UOGUOHoddod , _ 9.25 ——— 8.75 H ° side view vy > Aare ees satel See OT . Fi %032 403 wl le 2 to 8°j, 0.23 soos mn) 10.0 71283896.3 @ Positional accuracy. Dimensions in mm @® Maximum Material Condition. , ” Fig.10 16-lead mini-pack; plastic (SO16L; SOT162A). 7 April 1991 17 :
PHILIPS INTERNATIONAL 4lE D MH 7120826 OO2L281 4 @EPHIN Product specification SMPS battery charger control circuit TEA1088T a SOLDERING mildly-activated flux eliminates the REPAIRING SOLDERED JOINTS Plastic mini-packs need for removal of corrosive (BY HAND-HELD SOLDERING IRON OR residues in most applications. PULSE-HEATED SOLDER TOOL) By wave - B PASTE REFLOW Fix the component by first soldering During placement and before Y SOLDER PASTE REFL‘ two, diagonally opposite, end pins. soldering, the component must be Reflow soldering requires the solder Apply the heating tool to the flat part fixed with a droplet of adhesive. paste (a suspension of fine solder of the pin only. Contact time must After curing the adhesive, the particles, flux and binding agent) to _be limited to 10 s at up to 300 °C. component can be soldered. The be applied to the substrate by When using proper tools, all other adhesive can be applied by screen —_screen printing, stencilling or pins can be soldered in one printing, pin transfer or syringe pressure-syringe dispensing before operation within 2 to 5 s at between r ) dispensing. device placement. 270 and 320 °C. (Pulse-heated Maximum permissible solder Several techniques exist for 5 eucvageny recommended for temperature is 260 °C, and refiowing; for example, thermal . maximum duration of package conduction by heated belt, infrared, For pulse-heated solder tool immersion in solder bath is 10s, if and vapour-phase reflow. Dwell (resistance) soldering of VSO allowed to cool to less than 150 °C times vary between 50 and 300 s packages, solder is applied to the within 6 s. Typical dwell time is 4 s according to method. Typical reflow substrate by dipping or by an extra at 250°C. temperatures range from 215 to thick tin/lead plating before package A modified wave soldering 250°C. placement. technique is recommended using Preheating is necessary to dry the two solder waves (dual-wave) in paste and evaporate the binding which a turbulent wave with high agent. Preheating duration: 45 min upward pressure is followed by a at 45°C. smooth laminar wave. Using a April 1991 18 3410 = F-03
PHILIPS INTERNATIONAL YE D MM 7330826 0021282 & MMPHIN Product specification SMPS battery charger control circuit TEA1088T DEFINITIONS 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 e operation of the device at these or at any other conditions above those given in the Characteristics sections of this specification is not implied. Exposure to limiting values for extended periods may affect device reliability. © Philips Export B.V. 1990 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 9397 303 90011 April 1991 20