U2402B

U2402B Fast Charge Controller for NiCd/NiMH Batteries Description The fast-charge battery controller circuit, U2402B, uses bipolar technology. The IC enables the designer to create an efficient and economic charge system. The U2402B incorporates intelligent multiple-gradient batteryvoltage monitoring and mains phase control for power management. With automatic top-off charging, the integrated circuit ensures that the charge device stops regular charging, before the critical stage of overcharging is achieved. It has two LED driver indications for charge and temperature status. Features D D D D D D D Multiple gradient monitoring Temperature window (Tmin/Tmax) Exact battery voltage measurement without charge Phase control for charge-current regulation Top-off and trickle charge function Two LED outputs for charge status indication Disabling of d2V/dt2 switch-off criteria during battery formation Applications D Portable power tools D Laptop/notebook personal computer D Cellular/cordless phones D Emergency lighting systems D Hobby equipment D Camcorder Package: DIP18, SO20 16 (18) 14 (15) 13 (14) 12 (13) 11 (12) D Battery-voltage check 18 (20) 17 (19) Sync ö C ö R VRef 6.5 V/10 mA Oscillator Status control 3 (3) Phase control Vöi 4 (4) Scan path 1 (1) Trigger output Control unit Gradient d2V/dt2 and –dV Battery detection VRef = 5 V 10 (11) VBatt Monitor 0.1 to 4 V Power - on control 15 (17) 2 (2) Power supply VS = 8 to 26 V 160 mV Ref Temp. control Sensor Tmax Charge break output 94 8585 5 (5) 6 (6) 7 (8) 8 (9) 9 (10) ( ) SO 20, Pins 7 and 16 NC Figure 1. Block diagram TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 1 (17) U2402B Pinning Package: DIP18 Output 1 18 Vsync 17 öC 16 öR 15 V S 14 VRef 13 Osc 12 STM. 11 LED1 10 VBatt Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol Output GND LED2 Vöi OPO OPI Tmax Sensor tp VBatt LED1 STM. Osc VRef VS ö R C GND 2 LED2 Vöi OPO OPI Tmax 3 4 5 6 7 Sensor 8 tp 9 93 7723 e ö Vsync. Symbol Output GND LED2 Vöi OPO OPI NC Tmax Sensor tp VBatt LED1 STM. Osc VRef NC VS ö R C Function Trigger output Ground Display output “Green” Phase angle control input voltage Operational amplifier output Operational amplifier input Maximum temperature Temperature sensor Charge break output Battery voltage LED display output “Red” Test mode switch (status control) Oscillator Reference output voltage Supply voltage Ramp current adjustment – resistance Ramp voltage – capacitance Mains synchronization input Function Trigger output Ground Display output “Green” Phase angle control input voltage Operational amplifier output Operational amplifier input Not connected Maximum temperature Temperature sensor Charge break output Battery voltage LED display output “Red” Test mode switch (status control) Oscillator Reference output voltage Not connected Supply voltage Ramp current adjustment – resistance Ramp voltage – capacitance Mains synchronization input Package: SO20 Output 1 20 19 18 17 16 15 14 13 Vsync GND 2 LED2 Vöi OPO OPI 3 4 5 6 ö ö C R VS NC VRef Osc STM. NC 7 Tmax 8 Sensor 9 tp 10 94 8594 12 LED1 11 VBatt ö Vsync. 2 (17) TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 D4 Mains T1 From Pin 15 VS 10 nF C0 13 12 11 1 kW D 7 Red R5 BC 308 R1 D6 10 k W 0.22 mF R0 270 k W R3 R4 C2 14 R Oscillator 16 ϕ VRef 6.5 V/10 mA ϕ 2.2 k W 10 nF 17 Sync C Phase control Vϕ i To Pin 4 1 Trigger output Gradient C1 VS 15 2 Power supply VS = 8 to 26 V 470 mF d2 V/dt 2 & –dV VBatt Monitor 0.1 to 4 V 160 mV Ref 5 6 1 mF CR Temp. control Tmax Sensor 1 mF C4 RT3 24 k W 10 k W C8 0.1 mF 7 8 Control unit Battery detection VRef = 5 V 18 560 k W 2x 560 W R7 1 kW C6 R13 C3 R10 10 W From RT1 / RT2 R8 1 kW D1 R2 0.1 mF 100 k W D5 TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 D8 Green R11 R9 10 k W Status control 3 Scan path RB1 1 kW I ch 10 Power on control NTC 4 Charge break output RT1 12 k W To VRef (Pin 14) RT2 100 k W 9 R6 D2 Th1 D3 Th2 RB2 C7 10 k W 4.7 mF 16 k W Figure 2. Block diagram with external circuit (DIP pinning) RB3 Battery (4 cells) DC 160 mV Rsh 0.2 W U2402B 94 8674 3 (17) U2402B General Description The integrated circuit, U2402B, is designed for charging Nickel-Cadmium (NiCd) and Nickel-Metal-Hydride (NiMH) batteries. Fast charging results in voltage lobes when fully charged (figure 3). It supplies two identifications ( i. e., + d2V/dt2, and – DV) to end the charge operation at the proper time. As compared to the existing charge concepts where the charge is terminated after voltage lobes according to – DV and temperature gradient identification, the U2402B-C takes into consideration the additional changes in positive charge curves, according to the second derivative of the voltage with respect to time (d2V/dt2). The charge identification is the sure method of switching off the fast charge before overcharging the battery. This helps to give the battery a long life by hindering any marked increase in cell pressure and temperature. Even in critical charge applications, such as a reduced charge current or with NiMH batteries where weaker charge characteristics are present multiple gradient control results in very efficient switch-off. An additional temperature control input increases not only the performances of the charge switching characteristics but also prevents the general charging of a battery whose temperature is outside the specified window. A constant charge current is necessary for continued charge-voltage characteristic. This constant current regulation is achieved with the help of internal amplifier phase control and a simple shunt-current control technique. All functions relating to battery management can be achieved with dc-supply charge systems. A dc-dc-converter or linear regulator should take over the function of power supply. For further information please refer to the applications. * * Battery insertion V10 5V Gradient recognition ) ddtV 2 2 Battery voltage check – DV –DV, – DV monitoring ) ddtV , 2 2 active shorted batteries ignored t Fast charge rate IO 95 10172 Battery formation t1 = 5 min Figure 3. Charge function diagram, fosc = 800 Hz Top off charge rate 1/4 IO t2 v 20 min Trickle charge rate 1/256 IO 4 (17) TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 U2402B Flow Chart Explanation, fosc = 800 Hz (Figures 2, 3 and 4) Battery pack insertion disables the voltage lock at battery detection input Pin 10. All functions in the integrated circuit are reset. For further description, DIP-pinning is taken into consideration. Top-Off Charge Stage By charge disconnection through the + d2V/dt2 mode, the device switches automatically to a defined protective top-off charge with a pulse rate of 1/4 IO (pulse time, tp = 5.12 s, period, T = 20.48 s). The top-off charge time is specified for a time of 20 minutes @ 800 Hz. Battery Insertion and –dV Monitoring The charging procedure will be carried out if battery insertion is recognised. If the polarity of the inserted battery is not according to the specification, the fast charge rate will stop immediately. After the polarity test, if positive, the defined fast charge rate, IO, begins for the first 5 minutes according to –dV monitoring. After 5 minutes of charging, the first identification control is executed. If the inserted battery has a signal across its terminal of less than 0.1 V, then the charging procedure is interrupted. This means that the battery is defective i.e., it is not a rechargeable battery – “shorted batteries ignored”. Voltage and temperature measurements across the battery are carried out during charge break interval (see figure 6), i.e., currentless or idle measurements. If the inserted battery is fully charged, the –dV control will signal a charge stop after six measurements (approximately 110 seconds). All the above mentioned functions are recognised during the first 5 minutes according to –dV method. During this time, +d2V/dt2 remains inactive. In this way the battery is protected from unnecessary damage. Trickle Charge Stage When top-off charge is terminated, the device switches automatically to trickle charge with 1/256 IO (tp = 5.12 s, period = 1310.72 s). The trickle continues until the battery pack is removed. Basic Description Power Supply, Figure 2 The charge controller allows the direct power supply of 8 to 26 V at Pin 15. Internal regulation limits higher input voltages. Series resistance, R1, regulates the supply current, IS, to a maximum value of 25 mA. Series resistance is recommended to suppress the noise signal, even below 26 V limitation. It is calculated as follows: R 1min R 1max w V25–26 V mA max d2V/dt2-Gradient If there is no charge stop within the first 5 minutes after battery insertion, then d2V/dt2 monitoring will be active. In this actual charge stage, all stop-charge criteria are active. vV min –8V I tot where Itot = IS + IRB1 + I1 Vmax, Vmin = Rectified voltage When close to the battery’s capacity limit, the battery voltage curve will typically rise. As long as the +d2V/dt2 stop-charging criteria are met, the device will stop the fast charge activities. IS = Current consumption (IC) without load IRB1 = Current through resistance, RB1 I1 = Trigger current at Pin 1 TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 5 (17) U2402B Start turn on Power on reset LED2 on Charge stop LED1 blinking no Cell inserted ? *) yes Cell insertion reset Cell in permissible temperature range ? yes Charging starts with - dV monitoring LED2 blinking Cell insertion yes Cell in permissible temperature range ? no LED1 on LED2 off no VBatt v4V no yes – dV switch off no no Cell inserted ? *) yes yes yes – dV and d2 V/dt2 monitoring begins yes Cell in permissible temperature range ? yes Charging time reaches 5 min. ? no Cell inserted ? *) no *) 70 mV > VBatt < 5 V no – dV disconnect ? yes LED1 on LED2 on no d2 V/dt2 disconnect ? yes LED2 on Top-off charging with 1/4 IO no Trickle charging with 1/256 IO yes 93 7696 e Cell inserted ? *) no yes Timer 20 min exceeded Figure 4. Flow chart 6 (17) TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 U2402B Battery Voltage Measurement The battery voltage measurement at Pin 10 (ADC-converter) has a range of 0 V to 4 V, which means a battery pack containing two cells can be connected without a voltage divider. 4 V) a safety If the AD converter is overloaded (VBatt switch off occurs. The fast charge cycle is terminated by automatically changing to the trickle charge. Precaution should be taken that under specified charge current conditions, the final voltage at the input of the converter, Pin 10, should not exceed the threshold voltage level of the reset comparator, which is 5 V. When the battery is removed, the input (Pin 10) is terminated across the pulled-up resistance, RB1, to the value of 5 V-reset-threshold. In this way, the start of a new charge sequence is guaranteed when a battery is reinserted. If the battery voltage exceeds the converter range of 4 V, adjusting it by the external voltage divider resistance, RB2 and RB3 is recommended. Value of the resistance, RB3 is calculated by assuming RB1 = 1 kW, RB2 = 10 kW, as follows: R B3 +R B2 V 10max V Bmax – V 10max w The minimum supply voltage, Vsmin, is calculated for reset function after removing the inserted battery according to: V smin + 0.03mA @ R B3 R B1 ) R ) 5V B2 R B1 R B3 )R )R B2 B3 where: V10max = Max voltage at Pin 10 VSmin = Min supply voltage at the IC (Pin 15) VBmax = Max battery voltage The voltage conditions mentioned above are measured during charge current break (switch-off condition). 15 RB1 VS VDAC – + VRef = 12 mV = VDAC – + Reset comparator VRef = 4.3 V Reset – + DAC control comparator - dV Recognition Ich VB V6 Rsh RB3 Battery RB2 VBatt 10 7V 95 10174 VRef = 0.1 V Figure 5. Input configuration for the battery voltage measurement Table 1. valid when V10max = 3.5 V Cell No. VSmin (V) RB3 (kW) 1 8 – 2 8 – 3 8 51 4 9 16 5 11 10 6 13 7.5 7 15 5.6 8 17 4.7 9 19 3.9 10 21 3.3 11 23 3 12 25 2.7 TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 7 (17) U2402B Analog-Digital-Converter (ADC), Test Sequence A special analog-digital-converter consists of a five-bit coarse and a five-bit fine converter . It operates by a linear count method which can digitalize a battery voltage of 4 V at Pin 10 in 6.5 mV steps of sensitivity. In a duty cycle, T, of 20.48 s, the converter executes the measurement from a standard oscillation frequency of fosc = 800 Hz. The voltage measurement is during the charge break time of 2.56 s (see figure 6), i.e., no-load voltage (or currentless phase). Therefore it has optimum measurement accuracy because all interferences are cut-off during this period (e.g., terminal resistances or dynamic load current fluctuations). After a delay of 1.28 s the actual measurement phase of 1.28 s follows. During this idle interval of cut-off conditions, battery voltage is stabilized and hence measurement is possible. An output pulse of 10 ms appears at Pin 9 during charge break after a delay of 40 ms. The output signal can be used in a variety of way, e.g., synchronising the test control (reference measurement). Plausibility for Charge Break There are two criterian considered for charge break plausibility: – DV Cut-Off When the signal at Pin 10 of the DA converter is 12 mV below the actual value, the comparator identifies it as a voltage drop of – dV. The validity of – dV cutt-off is considered only if the actual value is below 12 mV for three consective cycles of measurement. d2V/dt2 Cut-Off A four bit forward/ backward counter is used to register the slope change (d2V/dt2, VBatt – slope). This counter is clocked by each tracking phase of the fine AD-counter. Beginning from its initial value, the counter counts the first eight cycles in forward direction and the next eight cycles in reverse direction. At the end of 16 cycles, the actual value is compared with the initial value. If there is a difference of more than two LSB-bit (13.5 mV) from the actual counter value, then there is an identification of slope change which leads to normal charge cut-off. A second counter in the same configuration is operating in parallel with eight clock cycles delay, to reduce the total cut-off delay, from 16 test cycles to eight test cycles. 94 8693 Status Charge break 2.56 s T= 20.48 s charge break output 10 ms 40 ms ADC conversion time (internal) 1.28 s 1.28 s t t Charge t Figure 6. Operating sequence of voltage measurements 8 (17) TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 U2402B Temperature Control, Figure 7 When the battery temperature is not inside the specified temperature windows, the overal temperature control will not allow the charge process. Sensor short circuit or interruption also leads to switch-off. Differentiation is made whether the battery exceeds the maximum allowable temperature, Tmax, during the charge phase or the battery temperature is outside the temperature window range before battery connection. A permanent switch-off follows after a measurement period of 20.48 s, if the temperature exceeds a specified level, which is denoted by a status of a red LED1. A charge sequence will start only when the specified window temperature range is attained. In such a case, the green LED2 starts blinking immediately showing a quasi charge readiness, even though there is no charge current flow. The temperature window is specified between two voltage transitions. The upper voltage transition is specified by the internal reference voltage of 4 V, and the lower voltage transition is represented by the external voltage divider resistances RT2 and RT3. NTC sensors are normally used to control the temperature of the battery pack. If the resistance values of NTC are known for maximum and minimum conditions of allowable temperature, then other resistance values, RT1, RT2 and RT3 are calculated as follows: suppose RT2 = 100 kW, then R T1 R T3 +R +R NTCmax V Ref – 4V 4V R T2 R T1 NTCmin If NTC sensors are not used, then select the circuit configuration according to figure 10. VRef RT2 VRef 14 Tmax 7 RT1 RT3 7V + – High temperature VRef = 4 V Sensor 8 NTC sensor 7V 94 8682 + – Low temperature Figure 7. Temperature window TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 9 (17) U2402B Current Regulation Via Phase Control (Figure 8) Phase Control An internal phase control monitors the angle of current flow through the external thyristors as shown in figure 2. The phase control block represents a ramp generator synchronized by mains zero cross over and a comparator. The comparator will isolate the trigger output, Pin 1, until the end of the half wave (figure 8) when the ramp voltage, Vramp, reaches the control voltage level, Vöi, within a mains half wave. Charge Current Regulation (Figure 2) According to figure 2 the operational amplifier (OpAmp) regulates the charge current, Ich (= 160 mV / Rsh), average value. The OpAmp detects the voltage drop across the shunt resistor (Rsh) at input Pin 6 as an actual value. The actual value will then be compared with an internal reference value (rated value of 160 mV). The regulator’s output signal, V5, is at the same time the control signal of the phase control, Vöi (Pin 4). In the adjusted state, the OpAmp regulates the current flow angle through the phase control until the average value at the shunt resistor reaches the rated value of 160 mV. The corresponding evaluation of capacitor CR at the operational amplifier (regulator) output determines the dynamic performance of current regulation. Vsync (Pin 18) 100mV fmains = 50 Hz Internal zero pulse Ramp voltage (Pin 17 ) 6V Vöi Vöi Vöi Trigger output (Pin 1) 0ms 10ms 20ms 30ms 93 7697 e Current flow angle Figure 8. Phase control function diagram 10 (17) TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 U2402B Status Control Status control inside and outside the charging process are designated by LED1 and LED2 outputs given in the table below: LED1 (red) OFF OFF ON Blinking LED2 (green) ON Blinking OFF OFF Status No battery, top off charge, trickle charge Quick charge, temperature out of the window before battery insertion or power on Temperature out of the window Battery break (interrupt) or short circuit f (LED) frequency, + Oscillator 1024 f osc The blink frequency of LED outputs can be calculated as follows: Oscillator Time sequences regarding measured values and evaluation are determined by the system oscillator. All the technical data given in the description are with the standard frequency 800 Hz. It is possibe to alter the frequency range in a certain limitation. Figure 9 shows the frequency versus resistance curves with different capacitance values. Oscillation Frequency Adjustment Recommendations: 0.5C charge 1C charge 2C charge 3C charge 10000 0.5 500 Hz = 250 Hz 500 Hz 2 3 500 Hz = 500 Hz = 1000 Hz 1500 Hz CO=2.2nF 1000 R O ( kW ) CO=10nF 100 CO=4.7nF 10 0.1 95 11408 1 fO ( kHz ) 10 Figure 9. Frequency versus resistance for different capacitance values TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 11 (17) U2402B Absolute Maximum Ratings Reference point Pin 2 (GND), unless otherwise specified Parameters Supply voltage pp y g Pin 15 Voltage limitation IS = 10 mA Current limitation Pin 15 t < 100 ms Voltages at different pins Pins 1, 3 and 11 Pins 4 to 10, 12 to 14 and 16 to 18 Currents at different pins Pin 1 Pins 3 to 14 and 16 to 18 Power dissipation Tamb = 60°C Ambient temperature range Junction temperature Storage temperature range Symbol VS IS V I Ptot Tamb Tj Tstg Value 26 31 25 100 26 7 25 10 650 –10 to +85 125 –40 to +125 Unit V mA V mA mW °C °C °C Thermal Resistance Parameters Junction ambient Symbol RthJA Maximum 100 Unit K/W Electrical Characteristics VS = 12 V, Tamb = 25°C, reference point Pin 2 (GND), unless otherwise specified. Parameters Power supply Voltage range Power-on threshold Current consumption Reference Reference voltage Reference current Temperature coefficient Operational amplifier OP Output voltage range Output current range Output pause current Non-inverting input voltage Non-inverting input current Test Conditions / Pins Pin 15 ON OFF without load Pin 14 IRef = 5 mA IRef = 10 mA VRef – IRef TC I5 = 0 V5 = 3.25 V Pin 5 Pin 5 Pin 5 Pin 6 Pin 6 V5 ±I 5 –Ipause V6 ±I 6 0.15 80 100 0 6.19 6.14 6.5 6.5 – 0.7 5.8 6.71 6.77 10 V V mA mV/K V Symbol VS VS IS Min. 8 3.0 4.7 3.9 Typ. Max. 26 3.8 5.7 9.1 Unit V V V mA mA mA 5 0.5 V mA 12 (17) TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 U2402B Parameters Test Conditions / Pins Comparator or temperature control Input current Pins 7 and 8 Input voltage range Pins 7 and 8 Threshold voltage Pin 8 Charge break output Pin 9 Output voltage High, I9 = 4 mA Low, I9 = 0 mA Output current V9 = 1 V Battery detection Pin 10 Analog-digital converter Conversion range Full scale level Input current 0.1 V VBatt 4.5 V Symbol I7, 8 V7, 8 V8 V9 I9 VBatt – IBatt VBatt IBatt D Min. – 0.5 0 3.85 8.4 Typ. Max. 0.5 5 4.15 Unit mA V V V mV mA V 100 10 0 3.85 4.8 8 80 15 4.7 20 0 800 4.3 2.2 – 0.5 2.9 0 0 3.3 10 15 83 100 15 4.8 12 5.0 4.0 0.5 5.3 35 120 v v mA V mA mV mV V mA Input voltage for reset Input current for reset Battery detection Hysteresis Mode select Threshold voltage Input current Sync. oscillator Frequency Threshold voltage Input current Phase control Ramp voltage Ramp current Ramp voltage range Ramp discharge current Synchronization Minimum current VBatt 5 V Maximum voltage Maximum voltage Pin 12 Test mode Normal mode Open Pin 13 R = 150 kW C = 10 nF High level Low level y VBatt Vhys V12 I12 fosc VT(H) VT(L) I13 Hz V 0.5 3.9 100 5 8 2 30 135 m "3% "3% A R = 270 kW ö Pin 16 V16 I16 V17 I17 – Isync – Isync Vsync Vhys V mA V mA m Maximum current Zero voltage detection Hysteresis Charge stop criteria (function) Positive gradient-turn-off fosc = 800 Hz threshold – DV-turn-off threshold Vsync 80 mV Vsync = 0 V v Pin 18 A mA mV mV Pin 10 d2V/dt2 – DV mV/min2 mV TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 13 (17) U2402B 14 (17) 10 W C1 220 m F R10 C2 10 kW 0.22 mF R1 1 kW R3 Output 1 ϕC RB1 Green Ready 3 18 T4 T2 BC237 T3 + 8 V to 26 V R2 15 16 17 Vsync 2 ϕR R5 GND 1 kW VS R4 22 kW R7 10 kW R8 10 kW C3 1 nF C10 10 m F T1 – 1 kW 1 kW TLHG5400 LED1 11 VRef 14 VBatt 10 4 5 OPI 6 7 Sensor 8 C8 0.1 mF RT1 12 kW 13 9 tp 12 STM Osc CO 10 nF Tmax RT3 24 k W OP O CR 1m F RT2 100 kW RO 270 kW Vϕ i BC308 BD646 D3 LED2 BYV27/50 D1 x) BYV27/50 Red Temp R12 100 kW 8 / VS + –4 LM358 R15 100 k W 10 kW C R17 1 m4 F 1kW R6 RB3 16 kW C7 4.7 mF RB2 10 kW R13 TLHR5400 L1 200 mH 1A R11 4.7 k W R9 10 kW R16 1 kW D2 1N4148 C5 47 mF 0.2 WW1 W / R14 Rsh 100 kW 100 kW Ich = 0.16 V/Rsh Battery NTC 94 8733 Figure 10. Car battery supplied charge system with high side current detection for four NiCd/NiMH cells @ 800 mA x) Manufacturer Pikatron TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 4148 4148 10 C1 220 F GND 15 16 17 5 4 1 Output C10 0.1 F I ch Battery C7 4.7 F R22 10 kW T 6 R20 10 W/ BC 308 4 W RB3 16 k W RB2 10 kW 10 VBatt 7 8 R6 10 k R25 6.2 kW BD 649 T2 Rsh = 0.16 V/Ich 0.1 W C8 0.1 F Tmax 14 OPO Vö i 2 R W R5 Green Ready 3 TLHG5400 LED1 11 18 TLHR5400 Vsync Red Temp RB1 1 kW LED2 1k m Mains D3 BYT86 Th2 R11 560 W BC 308 D6 4148 R7 1 kW R3 2.2 kW R13 0.1 F 10 kW R10 560 W T1 C6 D2 Th1 D4 D5 4148 R8 1 kW R2 100 k W VS D1 R1 W ö ö C TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 R4 m 560 k C3 W 10 nF CR 4.7 F C2 0.22 F R9 10 kW m VRef m Sensor (Pin 8) R23 10 k W m m VBatt (Pin 10) T3 BC 307 R21 1 kW R24 10 k W NTC D14 4148 RT2 D13 BC 307 S1 D10 4148 D11 4148 D12 R28 R27 1k 10 k BC 308 W W T5 T4 m RT1 12 k W W C4 1F Sensor 6 RT3 24 k OPI 13 Osc W m 9 tp 12 S TM CO 10 nF 100 k RO W 270 k W Figure 11. Standard application with predischarge for eight NiCd/NiMH cells @ 1600 mA R26 10 k W R29 10 k W 94 8734 U2402B D13 , D14 = 1N4148 15 (17) U2402B Package Information Package DIP8 Dimensions in mm 9.8 9.5 1.64 1.44 7.77 7.47 4.8 max 6.4 max 0.5 min 0.58 0.48 7.62 8 5 2.54 3.3 0.36 max 9.8 8.2 technical drawings according to DIN specifications 13021 1 4 Package SO20 Dimensions in mm 12.95 12.70 9.15 8.65 7.5 7.3 2.35 0.4 1.27 11.43 20 11 0.25 0.10 10.50 10.20 0.25 technical drawings according to DIN specifications 13038 1 10 16 (17) TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 U2402B Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423 TELEFUNKEN Semiconductors Rev. A3, 14-Nov-96 17 (17)