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U2400B 데이터시트 PDF




TEMIC에서 제조한 전자 부품 U2400B은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 U2400B 기능
기능 Charging of Batteries
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U2400B 데이터시트, 핀배열, 회로
U2400B
Charging of Batteries with Automatic Pre-Discharge
Description
The monolithic integrated circuit, U2400B, is a bipolar
circuit, designed for automatic recharging of NiCd/
NiMH batteries. It has controlled and defined charging
characteristics for various charging sequences with
*subsequent trickle charge operation. The long life
*Memory Effect of the recharging cell remains intact.
Features
D Three time selections:
0.5 h, 1 h or 12 h with subsequent trickle charge
operation
D Battery temperature and contact monitoring
D Charging interrupt for overvoltage or excessive
temperature
D Automatic pre-discharge possible
D Separate charge- and discharge outputs
D Pulse-width modulation facility of charge- and
discharge current for matching to transformer or
battery data
D Timer clock via mains or internal oscillator
D Reference voltage source
D LED-status output for mode indication
Case: DIP16, SO16L
8 14
16
0.5 Hz
94 9375
11 Mains supply
7
Reference
Open Ref
on off
Test
logic
Mains
synchronization
1
3 200 Hz
Oscillator
2+
Control unit
PWM
Time
Status Discharge Reset
13
Ref 12 h
GND 1 h
Charge
time
selection
Open 0.5 h
Failure – charge mode
II Continue Alternating
15 Ref charging red / green
I Stop
Red
Open charging indicator
Status
display
output
9
Charge
Start
Stop
Charge
output 12
Discharge
stop
0.53 V
+
–6
0.53 V
+
Sensor
monitoring
5
+
– 2.95 V
Event
counter
Vmax
0.53 V
+4
Battery
contact monitoring
+ 0.18 V
10
Discharge
output
Figure 1. Block diagram
TELEFUNKEN Semiconductors
Rev. A2, 21-Nov-96
1 (15)




U2400B pdf, 반도체, 판매, 대치품
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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U2400B 전자부품, 판매, 대치품
U2400B
Pulse Width Modulation (PWM)
There are two separate inputs to PWM comparator.
Positive lead is available at Pin 2, whereas negative lead
is connected directly to the oscillator as shown in figure 9.
A DC voltage in the range of 0.9 to 2.1 V at the compara-
tor input Pin 2, switches-off the charge and discharge
outputs, when the oscillator ramp voltage at Pin 3 has a
higher value than the applied voltage at Pin 2.
The PWM is operating independently of discharge,
charge or trickle mode. The effective current requirement
for the different battery types of same voltage can be
maintained by voltage ratio given below:
Programming Inputs
Pin 14
The internal clock signal can be derived either from the
mains sync. circuit or from the autonomous oscillator.
Internal oscillator clock disconnection is achieved with
Pin 14 (figure 7).
Oscillator clock disconnected, when Pin 14 is connected
to Pin 7 (ref.).
Oscillator clock connected, when Pin 14 is grounded
(Pin 11) or open.
In case the oscillator clock is connected, it operates as a
timer clock.
+R11
R12
V2
V7 – V2
The recommended current range is 20 to 200 mA.
VPWM
V
1.2
0
VPWM
1.8
V
0
t
t
R11
2
R12
3
C2 R1
7
C3
PWM Comparator
+
2V
1V
Oscillator
VRef int.
3V
94 9383
Vosc
2.0
V
1.2
1.0
0
Vosc
2.0
1.8
V
10
0
t
t
I10
100
mA
0
I10
100
mA
0
t
t
I12
0
mA
–100
I12
0
t mA
–100
t
94 9384
Figure 10. Pulse sequence for PWM circuit of figure 9
100
80
Figure 9. PWM comparator input voltage circuit for different
cell capacities
In case the internal clock signal is generated via mains
synchronisation at Pin 1, then Pin 14 should be connected
to Pin 7. The oscillator circuit frequency at Pin 3 can be
selected now deviating from 200 Hz.
Figure 10 shows pulse diagram of PWM with respect to
discharge and charge output currents, whereas figure 11
represents its ratio respecting voltage at Pin 2.
60
40
20
0
1 1.2 1.4 1.6 1.8 2.0
95 9812
V2 ( V )
Figure 11. Duty cycle of PWM circuit of figure 9
TELEFUNKEN Semiconductors
Rev. A2, 21-Nov-96
7 (15)

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