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U2400B Datasheet

Charging of Batteries with Automatic Pre-Discharge

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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)
Vishay Telefunken
Vishay Telefunken



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