U2400B Просмотр технического описания (PDF) - Temic Semiconductors
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U2400B Datasheet PDF : 15 Pages
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U2400B
A two-stage event counter will be incremented with each
limit value violation. If the event counter stores two inter-
ruptions, subsequent behaviour is determined by the
programming at Pin 15:
D An open circuit at Pin 15 means that the charge mode
has to be cancelled after 2 limit value violation. This
is indicated by a flashing red display.
D If the IC’s internal reference voltage (Pin 7) is
connected to Pin 15, only the display mode changes:
alternating red-green flashing. After the limit value
violation has elapsed, the IC attempts to make up for
the remaining charging period so that the maximum
possible residual capacity will be made available even
if a battery is already damaged.
The timer clock for programmable charging period and
other internal clocks is obtained either from the internal
200 Hz oscillator, figure 6, or from the external mains
synchronization (figure 7). Figure 8 shows that an
external timer clock (via Pin 16) for deviating charging
periods is possible. In this case, the internal oscillator or
mains synchronization must be activated to clock the
control unit.
The negative input of a pulse-width modulator (PWM) is
connected to the ramp oscillator (Pin 3). Pin 2 provides
the positive input for this comparator (figure 9).
Discharge
10
O10
Charge
12
O12
94 9378
mA
I10
100
0
mA
I12
0
–100
mA
I12
0
–100
1.2 s
Discharge
Charge 30 min / 1 h
Charge 12 h
100 ms
mA
I12
0
–100
16.8 s
Trickle charge
100 ms
Figure 4. Discharge, charge outputs
4 (15)
TELEFUNKEN Semiconductors
Rev. A1, 21-Nov-96
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