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PDF ( 数据手册 , 数据表 ) U2400B

零件编号 U2400B
描述 Charging of Batteries
制造商 TEMIC
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U2400B 数据手册, 描述, 功能
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, 数据表
U2400B
Pin 15
There are two failure-function-possibilities.
Failure Function I I15 = 0 or 0 to 0.8 V
When overvoltage and/or overtemperature occurs, trickle
charge starts.
Display mode: red blinking.
Failure Function II V15 = 2.4 to 3.0 V
The display mode will be changed after two events.
Charging time will continue after each failure event.
Display mode: alternating red/ green flashing
Discharge Stop Comparator figure 12
Comparator turns-off the discharge process when
V6 VT6, i.e., the specified discharge voltage of the cell
is attained.
The following realtaionship is valid:
+R3 R5
VT6
VB – VT6
R5
Vmin comparator
VB 6
R3 +
Take care that the input stand-by current of the compa-
rator is less than one-tenth of divider current.
Recommended idle divider current 20 mA.
R4
VB
4 Vmax comparator
+
R2
VT4max
94 9386
Figure 13. Vmax-comparator circuit
Temperature comparator figure 14
This comparator interrupts the discharge and charge out-
puts when V5 VT5min.
The following relationship is valid:
+ )R6
VRef – VT5min
VT5min
(RNTC
R17)
RNTC is calculated at 45°C.
To avoid an overload of the internal reference source
voltage, idle current is recommended in the range of
20 mA to 2 mA.
VT6
94 9385
Figure 12. Comparator threshold dimensioning circuit
Vmax Comparator figure 13
The comparator interrupts the discharge and charge out-
puts when V4 VT4max.
The following relationship is valid:
+R2 R4
VT4max
VB – VT4max
When selectin the current flow for the voltage divider
(R4, R2), take care that the (1/180 of one hour charge)
does not discharge the battery.
VRef
7
R6
VT
R17
1.5 kW
5
Temperature
comparator
+
RNTC
VT5min
94 9387
Figure 14. Temperature comparator
8 (15)
TELEFUNKEN Semiconductors
Rev. A1, 21-Nov-96














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