U2405B Fast Charge Controller for Drained NiCd/NiMH Batteries Description The fast-charge battery controller circuit, U2405B, uses bipolar technology. The IC enables the designer to create an efficient and economic charge system. The U2405B 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 incorporates an additional algorithm for reactivating fully drained batteries especially after longtime storage. It has two LED driver indications for charge and temperature status. Features Applications D D D D D D D D Preformation algorithm for drained batteries D Portable power tools Multiple gradient monitoring D Laptop/notebook personal computer Temperature window (Tmin/Tmax) D Cellular/cordless phones Exact battery voltage measurement without charge D Emergency lighting systems Phase control for charge-current regulation D Hobby equipment Top-off and trickle charge function D Camcorder Two LED outputs for charge status indication Disabling of d2V/dt2 switch-off criteria during battery formation D Battery-voltage check 18 (20) 17 (19) Sync ö Package: DIP18, SO20 16 (18) C ö R 14 (15) 11 (12) VRef Oscillator 6.5 V/10 mA Phase control 12 (13) 13 (14) Status control 3 (3) Vöi Scan path 4 (4) 1 (1) Control unit Trigger output Battery detection VRef = 5 V Gradient d2V/dt2 and –dV 10 (11) Power - on control 15 (17) VBatt Monitor 0.1 to 4 V Power supply 160 mV Ref VS = 8 to 26 V 2 (2) 94 8585 5 (5) 6 (6) Temp. control Sensor Tmax 7 (8) 8 (9) Charge break output 9 (10) ( ) SO 20, Pins 7 and 16 NC Figure 1. Block diagram TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 1 (17) U2405B Pin Description Package: DIP18 Output 18 Vsync 1 GND 2 17 öC LED2 3 16 öR Vöi 4 15 V S OPO 5 14 VRef OPI 6 13 Osc Tmax 7 12 STM. 11 LED1 Sensor 8 tp 9 93 7723 e 10 VBatt Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol Output GND LED2 Vöi OPO OPI Tmax Sensor tp VBatt LED1 STM. Osc VRef VS ö R ö 17 18 Vsync. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Symbol Output GND LED2 Vöi OPO OPI NC Tmax Sensor tp VBatt LED1 STM. Osc VRef NC VS ö 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 Package: SO20 1 20 Vsync GND 2 19 ö LED2 3 18 ö Vöi 4 17 VS OPO 5 16 NC OPI 6 15 VRef NC 7 14 Osc 13 STM. Output Tmax 8 11 10 94 8594 2 (17) R 12 LED1 Sensor 9 tp C VBatt 19 20 R ö C Vsync. 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 TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 Mains TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 94 8674 0.2 160 mV Battery (4 cells) RB3 ϕ 10 k W Power on control Power supply VS = 8 to 26 V Trigger output 4 5 1 mF CR R To Pin 4 ϕ 16 R4 560 k W C Phase control Vϕ i Sync 17 10 nF C6 R13 C3 0.1 mF R2 W 2 VS 15 1 18 2.2 k W R3 10 k W 10 W 100 k W R6 NTC C1 R1 D1 470 mF R7 1 kW 2x 560 W D6 R8 1 kW Rsh DC I ch 1 kW 10 k W R9 10 k W R11 R10 RB1 Th2 Th1 BC 308 T1 RB2 4.7 mF 16 k W C7 D3 D2 D5 D4 6 270 k W 1 mF C0 24 k W RT3 7 12 Red 100 k W RT2 9 Charge break output VBatt Monitor 0.1 to 4 V Battery detection VRef = 5 V Scan path Status control 11 1 kW D 7 R5 10 3 D8 Green RT1 12 k W To VRef (Pin 14) 0.1 mF 8 Tmax Sensor Temp. control C8 10 nF VS From Pin 15 Oscillator 13 d2 V/dt 2 & –dV Gradient 160 mV Ref C4 R0 Control unit VRef 6.5 V/10 mA 14 C2 0.22 mF From RT1 / RT2 U2405B Figure 2. Block diagram with external circuit (DIP pinning) 3 (17) U2405B General Description The integrated circuit, U2405B, 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. * 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. * As compared to the existing charge concepts where the charge is terminated after voltage lobes according to – DV and temperature gradient identification, the U2405B 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. A specific preformation algorithm is implemented for reactivating fully drained batteries especially in the case of batteries that have been stored for a long time. 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-DCconverter or linear regulator should take over the function of power supply. For further information please refer to the applications. Even in critical charge applications, such as a reduced charge current or with NiMH batteries where weaker charge characteristics are present multiple gradient Battery insertion Battery voltage 5V Top-off charge stop Fast charge stop d 2V dt2 ) without charge control –DV preformation ÎÎ 1.6 V –DV ) ddtV , –DV 2 2 Fast charge rate IO I (RB1) 95 10616 Top-off charge rate 1/4 IO t1 = 5 min t2 = 20 min Trickle charge rate 1/256 IO t Figure 3. Charge function diagram, fosc = 800 Hz 4 (17) TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 U2405B 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. Battery Insertion and –DV Monitoring After battery insertion fast charge Io begins when the input voltage VBatt is higher than 1.6 V. For the first 5 minutes the d2V/dt2-gradient recognition is suppressed, –DV monitoring is activated. In case the detected VBatt voltage is less then 1.6 V, the special preformation procedure will be activated. The reference level with respect to the cell voltage can be adjusted by the resistor RB3 (see figure 2). Preformation Procedure Before fast charge of fully drained or long time stored batteries begin, a reactivation is necessary. The preformation current is dependent on pull-up resistor RB1. The fast charge starts only after the VBatt is higher than 1.6 V level. During the first 10 minutes the green LED2 is blinking. If, after 10 minutes, VBatt voltage has not reached the reference level, the indication changes to red blinking LED1. The charge will continue with preformation rate I (RB1). In case VBatt increases to 1.6 V reference level, the fast charge rate current, Io, is switched-on and the green LED2 is blinking. –DV Cut-Off (Monitoring) 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 cut-off is considered only if the actual value is below 12 mV for three consecutive cycles of measurement. 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. 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 V w V25–26 mA R 1max vV max – 8 V I tot min where Itot = IS + IRB1 + I1 Vmax, Vmin = Rectified voltage d2V/dt2-Gradient IS = Current consumption (IC) without load 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. IRB1 = Current through resistance, RB1 I1 = Trigger current at Pin 1 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. TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 5 (17) U2405B Start Power on reset LED1,2 off yes *) 70 mV > VBatt < 5 V no Batt. inserted *) no Temp. range ? yes Reset Charge stop LED1 on LED2 blinking yes no Temp. range ? Preformation current I RB1 Fast charge begins LED1 blinking yes no VBatt > 1.6 V yes LED2 blinking VBatt ≤ 4 V no Charge time t1>5 min? tch>10 min LED1 blinking LED2 off no LED1 off LED2 blinking yes no –dV switch off –dV and d2V/dt2 monitoring activated yes yes Batt. inserted *) yes no no Batt. inserted *) no Batt temp range? yes –dV disconnect LED1 on yes d2V/dt2 disconnect ? no LED2 on LED2 on Trickle charge 1/256 IO Top off charge 1/4 IO Batt. inserted *) yes no no no t2> 20 min 95 10625 Figure 4. Flow chart 6 (17) TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 U2405B Battery Voltage Measurement Value of the resistance, RB3 is calculated by assuming RB1 = 1 kW, RB2 = 10 kW, as follows: The battery voltage measurement at Pin 10 (ADCconverter) has a range of 0 V to 4 V, which means a battery pack containing two cells can be connected without a voltage divider. R B3 w 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. B2 V 10max V Bmax – V 10max The minimum supply voltage, Vsmin, is calculated for reset function after removing the inserted battery according to: 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-resetthreshold. In this way, the start of a new charge sequence is guaranteed when a battery is reinserted. V smin + 0.03mA @ R ǒR ) R RǓ ) 5V ǒR ) R ) R Ǔ B3 B1 B2 B3 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). VS RB1 - dV Recognition – + VRef = 12 mV Ich RB2 Battery B2 B3 VDAC VB B1 where: If the battery voltage exceeds the converter range of 4 V, adjusting it by the external voltage divider resistance, RB2 and RB3 is recommended. 15 +R = DAC control comparator VDAC VBatt 10 – + V6 Rsh Reset comparator RB3 7V VRef = 4.3 V Reset 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. 1 2 3 4 5 6 7 8 9 10 11 12 VSmin (V) 8 8 8 9 11 13 15 17 19 21 23 25 RB3 (kW) – – 51 16 10 7.5 5.6 4.7 3.9 3.3 3 2.7 TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 7 (17) U2405B Analog-Digital-Converter (ADC), Test Sequence Plausibility for Charge Break 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. – DV Cut-Off 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). There are two criterian considered for charge break plausibility: 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 Charge t 2.56 s T= 20.48 s charge break output t 10 ms 40 ms ADC conversion time (internal) 1.28 s t 1.28 s Figure 6. Operating sequence of voltage measurements 8 (17) TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 U2405B 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. 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 NTCmin V Ref – 4V 4V R T2 R T1 VRef VRef 14 RT2 Tmax 7 RT1 + – High temperature RT3 7V VRef = 4 V + – Sensor Low temperature 8 NTC sensor 7V 94 8682 Figure 7. Temperature window TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 9 (17) U2405B Charge Current Regulation (Figure 2) 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. 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. fmains = 50 Hz Vsync (Pin 18) 100mV 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. A2, 14-Nov-96 U2405B 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 ON OFF Blinking OFF Status Top-off charge, trickle charge Quick charge Temperature out of the window Drained battery (0.1 V < VBatt > 1.6 V, if t > 10 min.) Battery break, short circuit Temperature out of window before battery insertion or power on No battery (VBatt > 5 V) frequency, + Oscillator 1024 The blink frequency of LED outputs can be calculated as follows: f (LED) Oscillator Oscillation Frequency Adjustment 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. Recommendations: It is possibe to alter the frequency range in a certain limitation. Figure 9 shows the frequency versus resistance curves with different capacitance values. 0.5C charge 0.5 f osc 500 Hz = 1C charge 250 Hz 500 Hz 2C charge 2 500 Hz = 1000 Hz 3C charge 3 500 Hz = 1500 Hz 10000 CO=2.2nF R O ( kW ) 1000 CO=10nF 100 CO=4.7nF 10 0.1 1 95 11408 10 fO ( kHz ) Figure 9. Frequency versus resistance for different capacitance values TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 11 (17) U2405B Absolute Maximum Ratings Reference point Pin 2 (GND), unless otherwise specified Parameters Supply pp y voltage g Voltage limitation Symbol VS Pin 15 Value 26 IS = 10 mA Unit V 31 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 IS Ptot Tamb Tj Tstg 25 100 26 7 25 10 650 – 10 to +85 125 – 40 to +125 mW °C °C °C Symbol RthJA RthJA Value 80 100 Unit K/W K/W V I mA V mA Thermal Resistance Junction ambient Parameters DIP18 SO20 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 Test Conditions / Pins Pin 15 ON OFF without load Min. VS VS 8 3.0 4.7 3.9 IS Typ. Max. Unit 26 3.8 5.7 9.1 V V V mA 6.71 6.77 10 V V mA mV/K Pin 14 IRef = 5 mA IRef = 10 mA Reference current Temperature coefficient Operational amplifier OP Output voltage range I5 = 0 Output current range V5 = 3.25 V Output pause current Non-inverting input voltage Non-inverting input current Comparator or temperature control Input current Input voltage range Threshold voltage 12 (17) Symbol VRef 6.19 6.14 – IRef TC Pin 5 Pin 5 Pin 5 Pin 6 Pin 6 Pins 7 and 8 Pins 7 and 8 Pin 8 V5 ±I5 –Ipause V6 ±I6 ±I7, 8 V7, 8 V8 6.5 6.5 – 0.7 0.15 80 100 0 0 3.85 5.8 V mA mA 5 0.5 0.5 5 4.15 V mA mA V V TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 U2405B Parameters Charge break output Output voltage Output current Battery detection Analog-digital converter Input current Input voltage for reset Input current for reset Battery detection Hysteresis Mode select Treshold voltage Input current Input current Sync. oscillator Frequency Threshold voltage Test Conditions / Pins Pin 9 High, I9 = 4 mA Low, I9 = 0 mA V9 = 1 V Pin 10 Conversion range Full scale level 0.1 V VBatt 4.5 V v v y5V VBatt Maximum voltage Maximum voltage Symbol Min. V9 8.4 I9 10 VBatt 0 3.85 – IBatt VBatt IBatt D VBatt Vhys 4.8 8 80 Typ. 5.0 Max. Unit 100 V mV mA 4.0 V 0.5 5.3 35 120 mA 15 V mA mV mV Pin 12 Testmode Normal mode Pin 12 open Pin 13 R = 150 kW C = 10 nF High level Low level Input current Phase control Ramp voltage Rö = 270 kW Pin 16 Ramp current Ramp voltage range Ramp discharge current Synchronisation Pin 18 Minimum current Vsync 80 mV Maximum current Vsync = 0 V Zero voltage detection Hysteresis Charge stop criteria (function) Pin 10 Positive gradient-turn-off fosc = 800 Hz threshold –DV-turn-off threshold v TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 V12 I12 4.7 20 0 V mA fosc 800 Hz VT(H) VT(L) I13 4.3 3% 2.2 3% " " V – 0.5 0.5 V16 I16 V17 I17 2.9 0 0 3.3 3.9 100 5 8 – Isync – Isync Vsync Vhys 10 15 83 2 30 135 100 15 d2V/dt2 4.8 – DV 12 mA V mA V mA mA mA mV mV mV/ min2 mV 13 (17) 14 (17) D1 C10 10 m F Rsh x) D3 BD646 Ich = 0.16 V/Rsh 0.2 WW /1W C5 47 mF BYV27/50 – + 8 V to 26 V NTC R2 100 k W R15 LM358 – 4 100 kW 8 / VS + R13 1 kW 1 kW RB1 RB3 16 kW RB2 10 kW C8 0.1 mF 10 kW C R17 1 m4F 1kW R6 1 kW R3 x) Manufacturer Pikatron Battery 100 kW R14 100 kW R12 L1 200 mH 1A BYV27/50 T1 R1 10 W LED2 Output 12 kW Sensor OPI VBatt TLHR5400 LED1 TLHG5400 1 kW RT1 C7 4.7 mF Red Temp Green Ready R5 8 6 10 11 3 1 VS STM tp 2 12 GND 13 7 5 4 14 18 17 16 220 m F 9 15 C1 Osc Tmax OP O Vϕ i VRef Vsync ϕC ϕR R4 22 kW CR 10 nF CO RT3 24 k W T4 R8 10 kW 270 kW RO 100 kW RT2 BC308 R9 10 kW T3 R7 10 kW BC237 1m F T2 C3 1 nF R10 C2 R11 4.7 k W 94 8733 D2 1N4148 R16 1 kW 10 kW 0.22 mF U2405B Figure 10. Car battery supplied charge system with high side current detection for 4 NiCd/NiMH cells @ 800 mA TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 D13 W R26 10 k R29 10 k W W m D2 Th1 T3 S1 BC 307 BC 307 R23 10 k W R25 6.2 kW R24 10 k W R11 560 W R21 1 kW T2 R9 10 kW R10 560 W D5 4148 BD 649 R20 10 W/ BC 308 4 W R22 10 kW T 6 D3 BYT86 Th2 C10 0.1 F D10 4148 D11 4148 T4 4148 D12 D13 , D14 = 1N4148 T5 W R28 R27 1k 10 k BC 308 D14 VBatt (Pin 10) Sensor (Pin 8) Mains D4 4148 R7 1 kW BC 308 D6 4148 Rsh = 0.16 V/Ich 0.1 W NTC Battery I ch T1 R8 1 kW 10 W m C6 m 10 k R6 m C4 1 F m C8 0.1 F W C7 4.7 F RB2 10 kW R3 2.2 kW R13 0.1 F 10 kW R2 100 k W D1 R1 4148 W LED2 W OPI Sensor VBatt Output Vsync TLHR5400 LED1 TLHG5400 1k RT1 12 k RB3 16 k W RB1 1 kW Red Temp Green Ready R5 6 8 10 1 18 11 3 VS tp 9 15 C1 13 7 14 4 5 17 16 S TM 12 2 GND m 220 F R CO 10 nF Osc RT3 24 k Tmax VRef m 94 8734 270 k RO W W 100 k RT2 C2 0.22 F 4.7 F Vö i m 10 nF CR W W 560 k C3 R4 OPO C ö ö U2405B Figure 11. Standard application with predischarge for 8 NiCd/NiMH cells @ 1600 mA 15 (17) U2405B Package Information Package DIP18 Dimensions in mm 7.77 7.47 23.3 max 4.8 max 6.4 max 0.5 min 3.3 1.64 1.44 0.58 0.48 0.36 max 9.8 8.2 2.54 20.32 18 10 technical drawings according to DIN specifications 1 13019 9 9.15 8.65 Package SO20 Dimensions in mm 12.95 12.70 7.5 7.3 2.35 0.25 0.25 0.10 0.4 10.50 10.20 1.27 11.43 20 11 technical drawings according to DIN specifications 13038 1 16 (17) 10 TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96 U2405B 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. A2, 14-Nov-96 17 (17)