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.
U2402B
Features
D
Multiple gradient monitoring
D
Temperature window (T
D
Exact battery voltage measurement without charge
D
Phase control for charge-current regulation
D
Top-off and trickle charge function
D
Two LED outputs for charge status indication
D
Disabling of d
2
V/dt2 switch-off criteria
min/Tmax
during battery formation
D
Battery-voltage check
18 (20)
4 (4)
Sync
17 (19)
ö
C
Phase control
V
ö
i
16 (18)
ö
R
)
6.5 V/10 mA
14 (15)
V
Ref
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
13 (14)
Oscillator
12 (13)
Status control
Scan path
11 (12)
3 (3)
1 (1)
15 (17)
2 (2)
94 8585
Trigger output
Power - on control
Power supply
= 8 to 26 V
V
S
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
5 (5)
Control unit
Gradient
2
d
V/dt2 and –dV
160 mV
Ref
6 (6)
Figure 1. Block diagram
Temp. control
max
Sensor
T
7 (8) 8 (9)
Battery
detection
V
= 5 V
Ref
V
Monitor
Batt
0.1 to 4 V
Charge break
output
9 (10)
( ) SO 20, Pins 7 and 16 NC
10 (11)
1 (17)
U2402B
Pinning
Package: DIP18
Output
GND
LED2
V
ö
OP
OP
I
T
max
Sensor
t
p
Pin Description
Pin Symbol Function
1 Output Trigger output
1
2
3
4
i
5
O
6
7
8
9
93 7723 e
18
17
16
15
14
13
12
11
10
V
sync
ö
C
ö
R
V
S
V
Ref
Osc
S
TM.
LED1
V
Batt
2 GND Ground
3 LED2 Display output “Green”
4 V
5 OP
öiPhase angle control input voltage
Operational amplifier output
O
6 OPIOperational amplifier input
7 T
Maximum temperature
max
8 Sensor Temperature sensor
9 t
10 V
Charge break output
p
Battery voltage
Batt
11 LED1 LED display output “Red”
12 S
Test mode switch (status control)
TM.
13 Osc Oscillator
14 V
15 V
16
ö
Reference output voltage
Ref
Supply voltage
S
Ramp current adjustment –
R
resistance
17
18 V
ö
C
sync.
Ramp voltage – capacitance
Mains synchronization input
Package: SO20
Output
GND
LED2
V
ö
OP
OP
NC
T
max
Sensor
t
p
Pin Symbol Function
1 Output Trigger output
1
20
V
sync
2 GND Ground
3 LED2 Display output “Green”
ö
2
3
19
18
C
4 V
5 OP
ö
R
6 OPIOperational amplifier input
öiPhase angle control input voltage
Operational amplifier output
O
7 NC Not connected
4
i
17
V
S
8 T
Maximum temperature
max
9 Sensor Temperature sensor
5
O
6
I
7
8
9
16
15
14
13
12
NC
V
Ref
Osc
S
TM.
LED1
10 t
11 V
Charge break output
p
Battery voltage
Batt
12 LED1 LED display output “Red”
13 S
Test mode switch (status control)
TM.
14 Osc Oscillator
15 V
Reference output voltage
Ref
16 NC Not connected
17 V
18
ö
Supply voltage
S
Ramp current adjustment –
R
resistance
10
94 8594
11
V
Batt
19
20 V
ö
C
sync.
Ramp voltage – capacitance
Mains synchronization input
2 (17)
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
U2402B
Green
8
D
Red
7
D
W
5
R
1 k
S
V
From Pin 15
From
m
0.1 F
2
R
W
100 k
1
D
W
8
R
1 k
1
T
4
D
5
D
T2
/ R
T1
R
C
W
10
1
R
D
BC 308
m
0.22 F
W
560 k
6
13
R
W
10 k
6
R
Th1
D
10 nF
0
R
2x
10
2
C
R
3
3
W
560
11
0
C
13 12
W
270 k
2
14
C
4
R
17 16
10 nF
W
18
2.2 k
7
R
11
R
R
Th2
3
D
V
ϕ
ϕ
Sync
W
1 k
W
9
10 k
3
Status
control
Scan path
Oscillator
Ref
6.5 V/10 mA
R
C
To Pin 4
i
ϕ
V
Phase control
Battery
detection
Control unit
Trigger output
1
B1
R
B2
R
10
= 5 V
Monitor
Ref
V
Gradient
V
C
WW
1 k
10 k
7
C
Batt
V
& –dV
2
V/dt
2
d
Power supply
2
15
S
1
ch
I
m
4.7 F
0.1 to 4 V
= 8 to 26 V
S
V
m
470 F
W
16 k
output
Charge break
Sensor
max
T
Temp. control
Ref
160 mV
control
Power on
B3
R
7 8 9
5 6
4
NTC
DC
Battery
(4 cells)
(Pin 14)
To V
W
12 k
T1
R
m
1 F
m
1 F
Ref
R
R
sh
R
160 mV
R
T3
6
W
T2
100 k
m
8
C
0.1 F
W
24 k
4
C
R
C
W
10 k
W
0.2
94 8674
Mains
Figure 2. Block diagram with external circuit (DIP pinning)
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
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., + d
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
2
V/dt2). The charge identification is the sure method of
(d
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
2
V/dt2, and – DV) to end the charge
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.
V
5 V
10
95 10172
Battery insertion
– DV
monitoring
Battery
formation
t1 = 5 min
Battery
voltage
check
–DV,
)
shorted batteries ignored
Fast charge rate I
2
d
dt
V
, active
2
O
Gradient recognition
2
d
V
)
2
dt
Top off
charge rate
1/4 I
O
t2 v 20 min
Trickle
charge rate
1/256 I
O
– DV
t
4 (17)
Figure 3. Charge function diagram, f
= 800 Hz
osc
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
U2402B
Flow Chart Explanation, f
= 800 Hz
osc
(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
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, I
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 char ging 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, +d
remains inactive. In this way the battery is protected from
unnecessary damage.
, begins for the
O
2
V/dt
Top-Off Charge Stage
By charge disconnection through the +d2V/dt
device switches automatically to a defined protective
top-off charge with a pulse rate of 1/4 I
= 5.12 s, period, T = 20.48 s).
t
p
The top-off charge time is specified for a time of
20 minutes @ 800 Hz.
2
(pulse time,
O
Trickle Charge Stage
When top-off charge is terminated, the device switches
automatically to trickle charge with 1/256 I
(tp = 5.12 s,
O
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, R
current, I
resistance is recommended to suppress the noise signal,
2
even below 26 V limitation. It is calculated as follows:
R
1min
, to a maximum value of 25 mA. Series
S
–26 V
V
max
w
25 mA
, regulates the supply
1
mode, the
d2V/dt2-Gradient
If there is no charge stop within the first 5 minutes after
battery insertion, then d
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 +d
stop-charging criteria are met, the device will stop the fast
charge activities.
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
2
V/dt2 monitoring will be active.
2
V/dt
V
–8V
v
min
I
tot
R
1max
where
I
= IS + I
tot
V
max, Vmin
I
= Current consumption (IC) without load
S
2
I
= Current through resistance, R
RB1
+ I
RB1
1
= Rectified voltage
I1 = Trigger current at Pin 1
B1
5 (17)
U2402B
Start
turn on
Power on reset
LED2 on
Charge stop
LED1 blinking
Cell in
permissible
temperature
yes
no
*) 70 mV > V
range ?
Cell
inserted ?
*)
< 5 V
Batt
Cell insertion
no
no
no
yes
Cell
inserted ?
*)
LED1 on
LED2 off
V
Batt
4 V
v
yes
–dV
switch off
–dV and d
monitoring begins
no
2
V/dt2
Cell in
permissible
temperature
range ?
no
yes
yes
yes
Cell insertion reset
no
yes
Cell in
permissible
temperature
yes
Charging starts with
-dV monitoring
LED2 blinking
Charging
time reaches
5 min. ?
inserted ?
range ?
noyes
no
Cell
*)
6 (17)
93 7696 e
LED1 on
–dV
disconnect ?
yes
LED2 on
Trickle charging
with 1/256 I
yes
Cell
inserted ?
*)
no
Figure 4. Flow chart
2
no
disconnect ?
Top-off charging
O
yes
with 1/4 I
Timer 20 min exceeded
d
V/dt
yes
LED2 on
2
no
O
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
U2402B
Ǔ
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.
If the AD converter is overloaded (V
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, R
B1,
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, R
and RB3 is recommended.
I
ch
V
B
Battery
V
6
w 4 V) a safety
Batt
to the value of
B2
15
R
B1
R
B2
V
Batt
10
Value of the resistance, R
= 1 kW, RB2 = 10 kW, as follows:
R
B1
V
RB3+
R
B2
10max
V
Bmax–V10max
The minimum supply voltage, V
is calculated by assuming
B3
, is calculated for
smin
reset function after removing the inserted battery
according to:
ǒ
R
B3
B1
smin
0.03mA@R
+
V
)
Ǔ
R
)
5VǒR
B2
R
B3
)
B1
where:
V
10max
V
Smin
V
Bmax
= Max voltage at Pin 10
= Min supply voltage at the IC (Pin 15)
= Max battery voltage
The voltage conditions mentioned above are measured
during charge current break (switch-off condition).
V
S
V
DAC
- dV Recognition
–
+
V
=
Ref
12 mV
=
V
DAC
DAC control
comparator
–
+
RB2)
R
B3
Reset
comparator
–
+
95 10174
Table 1. valid when V
10max
R
sh
R
B3
7 V
V
=
Ref
4.3 V
Reset
V
= 0.1 V
Ref
Figure 5. Input configuration for the battery voltage measurement
= 3.5 V
Cell No. 1 2 3 4 5 6 7 8 9 10 11 12
V
(V) 8 8 8 9 11 13 15 17 19 21 23 25
Smin
RB3 (k
W)
– – 51 16 10 7.5 5.6 4.7 3.9 3.3 3 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
= 800 Hz. The voltage measurement is during the
f
osc
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 (d
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.
2
V/dt2, V
– slope). This counter is
Batt
Status
charge
break
output
ADC
conversion
time
(internal)
Charge break
2.56 s
10 ms
40 ms
1.28 s 1.28 s
94 8693
Charge
t
T= 20.48 s
t
t
8 (17)
Figure 6. Operating sequence of voltage measurements
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
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, T
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 LED
sequence will start only when the specified window
temperature range is attained. In such a case, the green
starts blinking immediately showing a quasi charge
LED
2
readiness, even though there is no charge current flow .
, during the
max
. A charge
1
U2402B
specified by the internal reference voltage of 4 V, and the
lower voltage transition is represented by the external
Ref
T2
T1
T2
–4V
4V
and RT3.
T1
voltage divider resistances R
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, R
and RT3 are calculated as follows:
R
T2
suppose R
= 100 kW, then
T2
+
R
R
T1
RT3+
R
NTCmax
NTCmin
V
R
R
,
The temperature window is specified between two
voltage transitions. The upper voltage transition is
V
T2
T
Ref
14
max
V
Ref
R
7
R
T1
R
T3
7 V
Sensor
8
NTC
sensor
7 V
If NTC sensors are not used, then select the circuit
configuration according to figure 10.
+
–
V
= 4 V
Ref
+
–
High
temperature
Low
temperature
94 8682
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
Figure 7. Temperature window
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,
reaches the control voltage level, V
V
ramp,
mains half wave.
f
V
sync
mains
(Pin 18)
100mV
Internal
zero pulse
= 50 Hz
öi, within a
Charge Current Regulation (Figure 2)
According to figure 2 the operational amplifier (OpAmp)
regulates the charge current, I
average value. The OpAmp detects the voltage drop
across the shunt resistor (R
sh
value. The actual value will then be compared with an
internal reference value (rated value of 160 mV).
The regulator’s output signal, V
control signal of the phase control, V
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 C
operational amplifier (regulator) output determines the
dynamic performance of current regulation.
(= 160 mV / Rsh),
ch
) at input Pin 6 as an actual
is at the same time the
5,
(Pin 4). In the
ö
i
at the
R
Ramp
voltage
(Pin 17
)
6V
Trigger
output
(Pin 1)
V
i
ö
V
i
ö
V
i
ö
0ms 10ms 20ms 30ms
Current flow angle
Figure 8. Phase control function diagram
93 7697 e
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) LED2 (green) Status
OFF ON No battery, top off charge, trickle charge
OFF Blinking Quick charge, temperature out of the window before battery insertion or power on
ON OFF Temperature out of the window
Blinking OFF Battery break (interrupt) or short circuit
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.
10000
CO=2.2nF
1000
W
O
R ( k )
f
(LED)
Oscillator frequency, f
+
1024
osc
Oscillation Frequency Adjustment
Recommendations:
0.5C charge 0.5 500 Hz = 250 Hz
1C charge 500 Hz
2C charge 2 500 Hz = 1000 Hz
3C charge 3 500 Hz = 1500 Hz
100
10
0.1 1
95 11408
Figure 9. Frequency versus resistance for different capacitance values
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
CO=10nF
CO=4.7nF
10
fO ( kHz )
11 (17)
U2402B
pp y g
S
Absolute Maximum Ratings
Reference point Pin 2 (GND), unless otherwise specified
Parameters Symbol Value Unit
Supply voltage Pin 15 V
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 T
Ambient temperature range T
Junction temperature T
Storage temperature range T
Thermal Resistance
= 60°C P
amb
S
26 V
31
I
S
25
100
V 26
I 25
10
tot
amb
j
stg
650 mW
–10 to +85 °C
125 °C
–40 to +125 °C
mA
V
7
mA
Parameters Symbol Maximum Unit
Junction ambient R
thJA
100 K/W
Electrical Characteristics
VS = 12 V, T
Power supply Pin 15
Voltage range V
Power-on threshold ON
Current consumption without load I
Reference Pin 14
Reference voltage I
Reference current – I
Temperature coefficient TC – 0.7 mV/K
Operational amplifier OP
Output voltage range I5 = 0 Pin 5 V
Output current range V5 = 3.25 V Pin 5 ±I
Output pause current Pin 5 –I
Non-inverting input voltage Pin 6 V
Non-inverting input current Pin 6 ±I
= 25°C, reference point Pin 2 (GND), unless otherwise specified.
amb
Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit
8 26 V
3.0
4.7
3.8
5.7
3.9 9.1 mA
6.19
6.14
6.5
6.5
6.71
6.77
10 mA
0.15 5.8 V
80
100
m
m
0 5 V
0.5
m
V
V
V
V
OFF
= 5 mA
Ref
I
= 10 mA
Ref
V
V
pause
S
S
S
Ref
Ref
5
5
6
6
A
A
A
12 (17)
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
U2402B
UnitMax.Typ.Min.SymbolTest Conditions / PinsParameters
Comparator or temperature control
Input current Pins 7 and 8 I
Input voltage range Pins 7 and 8 V
Threshold voltage Pin 8 V
7, 8
7, 8
8
Charge break output Pin 9
Output voltage High, I9 = 4 mA
Low, I
= 0 mA
9
Output current V9 = 1 V I
V
9
9
Battery detection Pin 10
Analog-digital converter Conversion range
V
Batt
Full scale level
Input current
0.1 V v V
v 4.5 V
Batt
Input voltage for reset V
Input current for reset
V
Batt
y 5 V
Battery detection Maximum voltage
Hysteresis Maximum voltage V
– I
Batt
Batt
I
Batt
D
V
Batt
hys
Mode select Pin 12
Threshold voltage Test mode V
Input current Normal mode
12
I
12
Open
Sync. oscillator Pin 13
Frequency R = 150 k
W
f
osc
C = 10 nF
Threshold voltage High level
Low level
Input current I
V
V
T(H)
T(L)
13
Phase control
Ramp voltage Rö = 270 k
Ramp current I
Ramp voltage range V
Ramp discharge current I
W
Pin 16 V
16
16
17
17
Synchronization Pin 18
Minimum current
Maximum current V
V
v 80 mV
sync
= 0 V – I
sync
Zero voltage detection V
Hysteresis V
– I
sync
sync
sync
hys
Charge stop criteria (function) Pin 10
Positive gradient-turn-off
f
= 800 Hz d2V/dt
osc
threshold
– DV-turn-off threshold – DV 12 mV
– 0.5 0.5
0 5 V
3.85 4.15 V
8.4
10 mA
0
3.85
4.8 5.0 5.3 V
8 35
80 120 mV
15 mV
20
0
800 Hz
4.3 "3%
2.2 "3%
– 0.5 0.5
2.9 3.9 V
0 100
0 5 V
3.3 8 mA
10 2
15 30
83 100 135 mV
15 mV
2
4.8 mV/min
100
mV
4.0 V
0.5
4.7 V
m
V
m
m
mA
V
m
mA
m
m
A
A
A
A
A
A
2
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
13 (17)
U2402B
m
220 F
1
C
2
C
10
R
8
R
7
R
3
C
4
R
m
0.22 F
W
10 k
W
10 k
W
10 k
1 nF
W
22 k
GND
S
V
W
1 k
5
R
R
ϕ
2
15
Output
W
1 k
2
D
1N4148
94 8733
16
R
W
R114.7 k
T4
W
BC308
10 k
Ref
V
14
TLHR5400
R
m
C
1 F
i
O
ϕ
V
OP
5
4
10
Batt
V
OP
7
m
C
4.7 F
11
LED1
9
R
T3
BC237
T2
sync
C
ϕ
V
18
17
16
1
3
LED2
TLHG5400
Red
Green
Ready
Temp
W
T2
R
100 k
W
T3
R
24 k
max
T
7
6
I
Sensor
W
O
R
270 k
CO10 nF
Osc
13
TM
12
S
p
t
9
8
W
T1
R
12 k
W
10
W
B1
R
1 k
W
3
1
R
R
2
R
1 k
W
W
B2
R
10 k
/ V
W
8
13
R
100 k
W
B3
R
16 k
S
4
–
+
LM358
1 k
14
R
/ 1 W
WW
0.2
W
100 k
W
m
1
BD646
BYV27/50
3
D
T1
m
10
C
10 F
1 A
200 H
L
x)
1
D
12
R
100 k
sh
R
5
C
m
47 F
–
+
8 V to
26 V
BYV27/50
R
R
6
15
sh
= 0.16 V/R
ch
I
4
C
W
10 k
W
100 k
m
1 F
R171k
W
Battery
C
8
m
0.1 F
NTC
Figure 10. Car battery supplied charge system with high side current detection for four NiCd/NiMH cells @ 800 mA
14 (17)
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
x) Manufacturer Pikatron
F
m
220
1
C
W
10
4148
R
D
1
1
GND
S
V
W
1 k
5
R
2
R
4
R
ö
2
15
LED2
Green
6
C
W
100 k
W
560 k
R
16
3
TLHG5400
Ready
F
m
0.1
C
C
ö
13
R
3
17
11
LED1
Red
Temp
W
10 k
R
F
C
m
4.7
10 nF
O
i
ö
OP
V
5
18
sync
V
TLHR5400
B1
R
3
R
2
C
4
W
1 k
W
2.2 k
F
m
0.22
Ref
V
1
Output
U2402B
W
12 k
F
m
0.1
R
R
O
Osc
W
270 k
O
C
10 nF
94 8734
13
TM
12
S
p
t
9
6
I
OP
4
F
C
m
1
W
6
10 k
ch
W
T2
R
100 k
W
T3
R
24 k
max
T
V
Batt
7
8
Sensor
T1
R
14
10
W
B3
16 k
R
W
B2
R
10 k
7
C
8
C
F
m
4.7
4148
8
R
5
4
D
Th1 D
W
1 k
1
T
4148
D2D
Mains
10
R
11
R
Th2
3
6
D
BC 308
W
560
W
560
BYT86
4148
7
W
R
1 k
ch
Battery
I
W
9
R
10 k
R
20
6
T
/
W
4 W
10
BC 308
W
22
R
10 k
R
F
10
m
C
0.1
Sensor (Pin 8)
24
R
W
23
10 k
4148
14
Batt (Pin 10)
D
V
D
NTC
W
10 k
T
D
13
3
12
R
R
21
R
BC 307
W
27
10 k
W
28
1 k
W
1 k
BC 307
4
T
BC 308
5
T
10
D
S1
R
25
R
4148
29
R
26
R
W
= 0.16 V/I
sh
0.1
BD 649
2
T
W
6.2 k
11
D
W
10 k
W
10 k
4148
Figure 11. Standard application with predischarge for eight NiCd/NiMH cells @ 1600 mA
14
D = 1N4148
13
D ,
TELEFUNKEN Semiconductors
Rev . A3, 14-Nov-96
15 (17)
U2402B
Package Information
Package DIP8
Dimensions in mm
Package SO20
Dimensions in mm
9.8
9.5
1.64
1.44
0.5 min
0.58
0.48
85
14
12.95
12.70
2.54
7.62
4.8 max
3.3
technical drawings
according to DIN
specifications
7.77
7.47
6.4 max
0.36 max
9.8
8.2
13021
9.15
8.65
7.5
7.3
2.35
0.4
1.27
11.43
20 11
110
0.25
0.10
technical drawings
according to DIN
specifications
10.50
10.20
0.25
13038
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)
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