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U2403B Datasheet, PDF (10/12 Pages) TEMIC Semiconductors – Charge Timer
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U2403B
Charge System at Higher Voltage of 30 V
Charge systems with higher voltages than VSmax can be
realized with the additional expander circuitry, as shown
in figure 8. This circuit contains a simple temperature
monitoring function. When the temperature level is
reached, the transistor, T3, is switched on. If T3 is
switched on and there is current flow into Pin 5, normal
charge is terminated.
+
DC-Supply
30 V
–
+ Battery
NTC
R 11
R 10
96 11707
T3
BC212
–
R1
Ich
R2
mounted BC212
on
T1
heatsink T2
LED1
BD135
red
R5
R7
R6
TLHR5400
D1
green
TLHG5400
LED2
8
7
6
D2
R8
5
U2403B
C2
1
2
3
4
LED1 normal charge
LED2 trickle charge
R4
W W W W R1 = 1 k , R2 = 10 k , R3 = f(IC), R4 = f(time), R5 =10 k /0.5 W, R6= 1 k ,
R3
W W W R7 = 10 k , R8 = 47 k , R10 =10 k , R11 = f(temp.), D1 = 1N4148, D2 = BZX85C10,
m C1 = 100 F/6 V, C2 = 10 nF, C4 = 330 pF
C4
R11 = f(temp.) depends on number of cells
Figure 8. U2403B for higher supply voltage up to 30 V with integrated temperature monitoring
No of Cells
2
3
4
5
W R11
13 k
8.2 kW
6.2 kW
4.7 kW
NTC Value
25°C
40°C
50°C
6.8 kW
3.9 kW
2.8 kW
10 (12)
TELEFUNKEN Semiconductors
Rev. A1, 20-Mar-96
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