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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
D D D D D D D D
Preformation algorithm for drained batteries 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
D Battery-voltage check
18 (20) 17 (19) 16 (18) 14 (15)
Package: DIP18, SO20
13 (14) 12 (13) 11 (12)
Sync
o
C
o
R
VRef 6.5 V/10 mA Oscillator Status control 3 (3)
Phase control Voi 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. A2, 14-Nov-96
1 (17)
U2405B
Pin Description
Package: DIP18 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 Voi OPO OPI Tmax Sensor tp VBatt LED1 STM. Osc VRef VS o
R C
Output
1
18 Vsync 17 oC 16 oR 15 V S 14 VRef 13 Osc 12 STM. 11 LED1 10 VBatt
GND 2 LED2 Voi OPO OPI Tmax 3 4 5 6 7
Sensor 8 tp 9
93 7723 e
o
Vsync. Symbol Output GND LED2 Voi OPO OPI NC Tmax Sensor tp VBatt LED1 STM. Osc VRef NC VS o
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 Voi OPO OPI 3 4 5 6
o o
C
R
VS NC VRef Osc STM.
NC 7 Tmax 8
Sensor 9 tp 10
94 8594
12 LED1 11 VBatt
o
Vsync.
2 (17)
TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96
D4
Mains D5 D1 R2 0.1 mF From Pin 15 VS 10 nF C0 13 12 11 1 kW D 7 Red R5 From RT1 / RT2 560 k W 0.22 mF R0 270 k W R4 C2 14 R Oscillator 16 VRef 6.5 V/10 mA R1 D6 10 k W R3 2.2 k W 10 nF 17 Sync C Phase control V 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 10 k W Temp. control Tmax Sensor 1 mF C4 RT3 R6 24 k W C8 0.1 mF 7 8 Control unit Battery detection VRef = 5 V 18 2x 560 W R7 1 kW C6 R13 C3 10 W T1 BC 308 R10 100 k W R8 1 kW
TELEFUNKEN Semiconductors Rev. A2, 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
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
U2405B
94 8674
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. 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. 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 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.
*
*
Battery voltage 5V
Battery insertion
Top-off charge stop Fast charge stop d 2V dt2
)
without charge control -DV
preformation
1.6 V
-DV
) ddtV , -DV
2 2
I (RB1)
95 10616
t1 = 5 min
4 (17)
II
Fast charge rate IO Top-off charge rate 1/4 IO t2 = 20 min Trickle charge rate 1/256 IO t
Figure 3. Charge function diagram, fosc = 800 Hz
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.
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
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).
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.
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.
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
-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.
vV
min
-8V I tot
where Itot = IS + IRB1 + I1 Vmax, Vmin = Rectified voltage IS = Current consumption (IC) without load IRB1 = Current through resistance, RB1 I1 = Trigger current at Pin 1
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. 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.
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U2405B
Start Power on reset LED1,2 off
yes *) 70 mV > VBatt < 5 V
Batt. inserted *)
no no Temp. range ?
Reset
yes Charge stop
LED1 on LED2 blinking
no Temp. range ?
yes
Preformation current I RB1
LED1 blinking
Fast charge begins
yes VBatt > 1.6 V yes
no
LED2 blinking
tch>10 min
VBatt 4 V yes -dV switch off
no
Charge time t1>5 min?
no
LED1 blinking LED2 off
LED1 off LED2 blinking
yes
-dV and d2V/dt2 monitoring activated yes Batt. inserted *) Batt temp range? yes no
no
no Batt. inserted *)
yes no
LED1 on
-dV disconnect
no
d2V/dt2 disconnect ?
no
LED2 on
LED2 on
Trickle charge 1/256 IO
Top off charge 1/4 IO
yes
Batt. inserted *)
yes no t2> 20 min
no
95 10625
Figure 4. Flow chart
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U2405B
Battery Voltage Measurement
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. 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-resetthreshold. 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
w
+R
B2
V 10max V Bmax - V 10max
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
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U2405B
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
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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
V Ref - 4V 4V R T2 R T1
NTCmin
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
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U2405B
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, Voi, 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, Voi (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 Voi Voi Voi
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 ON OFF LED2 (green) ON Blinking OFF 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)
The blink frequency of LED outputs can be calculated as follows:
f (LED)
frequency, + Oscillator 1024
f osc
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.
10000
Oscillation Frequency Adjustment
Recommendations: 0.5C charge 1C charge 2C charge 3C charge 2 3 500 Hz = 500 Hz = 0.5 500 Hz = 250 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
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U2405B
Absolute Maximum Ratings
Reference point Pin 2 (GND), unless otherwise specified Parameters Supply voltage pp y g Voltage limitation Pin 15 IS = 10 mA IS V I Ptot Tamb Tj Tstg Symbol VS Value 26 31 25 100 26 7 25 10 650 - 10 to +85 125 - 40 to +125 mA V mA mW C C C Unit V
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 = 60C Ambient temperature range Junction temperature Storage temperature range
Thermal Resistance
Junction ambient Parameters DIP18 SO20 Symbol RthJA RthJA Value 80 100 Unit K/W K/W
Electrical Characteristics
VS = 12 V, Tamb = 25C, 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 Pin 14 IRef = 5 mA IRef = 10 mA VRef - 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 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
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)
mA mA
5 0.5 0.5 5 4.15 V
mA mA
V V
0 3.85
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 VBatt Maximum voltage Maximum voltage Pin 12 Testmode Normal mode Pin 12 open Pin 13 R = 150 kW C = 10 nF High level Low level V12 I12 4.7 20 0 800 4.3"3% 2.2"3% - 0.5 2.9 0 0 3.3 10 15 83 0.5 3.9 100 5 8 2 30 135 Symbol V9 I9 VBatt - IBatt VBatt IBatt D VBatt Vhys Min. 8.4 100 10 0 3.85 4.8 8 80 5.0 4.0 0.5 5.3 35 120 Typ. Max. Unit V mV mA V
vv y5V
mA
V
mA
mV mV V
15
m mA
Hz V
fosc VT(H) VT(L) I13 V16 I16 V17 I17 - Isync - Isync Vsync Vhys d2V/dt2 - DV
Input current Phase control Ramp voltage Ro = 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
mA mA
V mA V
v
mA mA
mV mV mV/ min2 mV
100 15 4.8 12
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U2405B
14 (17)
10 W C1 220 m F R10 C2 10 kW 0.22 mF R1 1 kW R3 Output 1 C RB1 Green Ready 3 18
T4 T2 BC237 T3
+ 8 V to 26 V R2 15 16 17 Vsync 2 R 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 RO 270 kW Tmax RT3 24 kW OP O CR 1m F RT2 100 kW V i
BC308
BD646
D3 LED2
BYV27/50
D1
x)
BYV27/50 Red Temp R12 100 kW 8 / VS + -4 LM358 R15 100 kW 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 kW 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 4 NiCd/NiMH cells @ 800 mA
x) Manufacturer Pikatron
TELEFUNKEN Semiconductors Rev. A2, 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 kW RB2 10 kW 10 VBatt 7 8 R6 C8 0.1 F Tmax 14 OPO Vo i 2
R
W
R5 Green Ready 3 TLHG5400 LED1 11 18 TLHR5400 Vsync Red Temp RB1 1 kW LED2 1 kW VS
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 kW
D1 R1
TELEFUNKEN Semiconductors Rev. A2, 14-Nov-96
R4
C
m
o o
560 kW C3 10 nF CR 4.7 F C2 0.22 F
R9 10 kW
m
VRef
m
Sensor (Pin 8) R23 10 kW T3 BC 307 R21 1 kW R24 10 kW NTC
m m
VBatt (Pin 10)
D14
4148
RT2
D13 BC 307 S1 R25 6.2 kW BD 649 T2 D10 4148 D11 4148 Rsh = 0.16 V/Ich 0.1 W
D12
R28 R27 1 kW 10 kW BC 308
T5
T4
m
RT1 12 kW 10 kW
Sensor 6 C4 1F
RT3 24 kW OPI 13 Osc
100 k RO
W m
9 tp 12 S TM CO 10 nF 270 k
W
Figure 11. Standard application with predischarge for 8 NiCd/NiMH cells @ 1600 mA
R26 10 kW
R29 10 kW
94 8734
U2405B
D13 , D14 = 1N4148
15 (17)
U2405B
Package Information
Package DIP18
Dimensions in mm
23.3 max 7.77 7.47
4.8 max 6.4 max 0.5 min 3.3 1.64 1.44 20.32 18 10 0.58 0.48 0.36 max 9.8 8.2
2.54
technical drawings according to DIN specifications
1
9 9.15 8.65 12.95 12.70 7.5 7.3
13019
Package SO20
Dimensions in mm
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. 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
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