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PDF U2403B Data sheet ( Hoja de datos )
| Número de pieza | U2403B | |
| Descripción | Charge Timer | |
| Fabricantes | TEMIC Semiconductors | |
| Logotipo |  |
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Charge Timer
U2403B
Description
The U2403B is a monolithic, integrated-bipolar circuit
which can be used in applications for time-controlled,
constant-current charge. Selection of charge current
versus timing is carried out by using the external circuit
at Pins 2, 3 and 4. For high current requirement, an
external transistor is recommended in series with the
battery. To protect the IC against high power loss
(typically > 140°C), the oscillator is shut down when the
reference voltage is switched off (0 V). The latter also
takes place when there is a saturation caused by collector
voltage at Pin 1. When the overtemperature has
disappeared and the collector voltage at Pin 1 has
exceeded the supply voltage (V1 > VS), charge time
operation continues (see flow chart in figure 3).
Features
D Easy-to-run autonomous dual rate charger
D Constant charge current
D 3 h – 24 h charge time programmable
D Low cost dc regulator
D Overtemperature protection
D Charge-mode indication
D Operation starts at the moment of battery insertion
D Fast charge time-test mode
Applications
D Cordless telephones
D Low-cost battery-charge timer
D Entertainment
Package: DIP8, SO8
Block Diagram
Power
supply
AC/DC
Battery
inserted
LED2
Charge
R1
R5
LED
LED1
Ready
8
C1
VS GND
67
94 8629
Charge mode
indicator
Power supply
VS = 3.5 to 12 V
Test
mode
5 STM
í max
140°C
1
V1
í
2
Shunt
Timer and control logic
VRef = 1.5 V/ 0.1 V/ 0 V
VRef
+
–
RC
oscillator
3
Sense
4
Osc
R3 R4
C4
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors
Rev. A2, 14–Nov–96
1 (12)
1 page  
Absolute Maximum Ratings
Reference point Pin 7 (GND), unless otherwise specified.
Parameters
Supply current
t ≤ 100 ms
Pin 6
Currents
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 8
Voltages
Pins 1, 3, 5, 6 and 8
Pin 2
Pin 4
Junction temperature
Ambient temperature
Storage temperature range
Symbol
IS
is
I1
– I2
I3
I4
I5
I8
V
V2
V4
Tj
Tamb
Tstg
Thermal Resistance
Parameters
Junction ambient
DIP8
SO8 on PC-board
SO8 on ceramic
SO8 on ceramic with thermal compound
Symbol
RthJA
U2403B
Value
20
100
300
310
1
15
– 75 to + 120
8
13.5
1.6
1.5
150
10 to 85
– 50 to + 150
Unit
mA
mA
mA
mA
mA
mA
mA
mA
V
°C
°C
°C
Value
120
220
140
80
Unit
K/W
TELEFUNKEN Semiconductors
Rev. A2, 14–Nov–96
5 (12)
5 Page 
Package Information
Package DIP8
Dimensions in mm
9.8
9.5
1.64
1.44
7.77
7.47
4.8 max
0.5 min 3.3
0.58
0.48 2.54
7.62
85
6.4 max
0.36 max
9.8
8.2
U2403B
Package SO8
Dimensions in mm
technical drawings
according to DIN
specifications
13021
14
5.2
4.8
5.00
4.85 3.7
1.4
0.4
0.25 0.2
0.10 3.8
1.27 6.15
3.81 5.85
85
technical drawings
according to DIN
specifications
85
13034
TELEFUNKEN Semiconductors
Rev. A2, 14–Nov–96
11 (12)
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet U2403B.PDF ] | |
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