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U2402B Schematic ( PDF Datasheet ) - TEMIC Semiconductors

Teilenummer U2402B
Beschreibung Fast Charge Controller for NiCd/NiMH Batteries
Hersteller TEMIC Semiconductors
Logo TEMIC Semiconductors Logo 




Gesamt 17 Seiten
U2402B Datasheet, Funktion
U2402B
Fast Charge Controller for NiCd/NiMH Batteries
Description
The fast-charge battery controller circuit, U2402B, uses
bipolar technology. The IC enables the designer to create
an efficient and economic charge system. The U2402B
incorporates intelligent multiple-gradient battery-
voltage monitoring and mains phase control for power
management. With automatic top-off charging, the
integrated circuit ensures that the charge device stops
regular charging, before the critical stage of overcharging
is achieved. It has two LED driver indications for charge
and temperature status.
Features
D Multiple gradient monitoring
D Temperature window (Tmin/Tmax)
D Exact battery voltage measurement without charge
D Phase control for charge-current regulation
D Top-off and trickle charge function
D Two LED outputs for charge status indication
D Disabling of d2V/dt2 switch-off criteria
during battery formation
D Battery-voltage check
Applications
D Portable power tools
D Laptop/notebook personal computer
D Cellular/cordless phones
D Emergency lighting systems
D Hobby equipment
D Camcorder
Package: DIP18, SO20
18 (20) 17 (19) 16 (18)
14 (15)
13 (14)
12 (13) 11 (12)
4 (4)
1 (1)
Sync
ö
C
ö
R
Phase control
Vöi
Trigger output
Power - on control
VRef
6.5 V/10 mA
Oscillator
Control unit
Gradient
d2V/dt2 and –dV
15 (17)
2 (2)
Power supply
VS = 8 to 26 V
160 mV
Ref
Temp. control
Tmax Sensor
94 8585
5 (5) 6 (6)
7 (8) 8 (9)
Figure 1. Block diagram
TELEFUNKEN Semiconductors
Rev. A3, 14-Nov-96
Status control
Scan path
Battery
detection
VRef = 5 V
VBatt Monitor
0.1 to 4 V
3 (3)
10 (11)
Charge break
output
9 (10)
( ) SO 20, Pins 7 and 16 NC
1 (17)






U2402B Datasheet, Funktion
U2402B
Start
turn on
Power on reset
Charge stop
LED1 blinking
LED2 on
Cell insertion
no
Cell in
permissible
no
yes
temperature
range ?
Cell
inserted ?
*)
yes
Cell insertion reset
LED1 on
LED2 off
Cell in
no permissible
temperature
range ?
yes
VBatt
v4V
yes
no
Charging starts with
- dV monitoring
LED2 blinking
– dV
no
switch off
yes
no Cell
yes
inserted ?
*)
*) 70 mV > VBatt < 5 V
yes
– dV and d2 V/dt2
monitoring begins
yes
Cell in
permissible
temperature
range ?
no
yes
Charging
time reaches
5 min. ?
no
Cell
inserted ?
*)
no
93 7696 e
LED1 on
– dV
disconnect ?
yes
LED2 on
no
Trickle charging
with 1/256 IO
yes Cell
inserted ?
*)
no
Figure 4. Flow chart
d2 V/dt2
disconnect ?
yes
no
LED2 on
Top-off charging
with 1/4 IO
yes
Timer 20 min exceeded
6 (17)
TELEFUNKEN Semiconductors
Rev. A3, 14-Nov-96

6 Page









U2402B pdf, datenblatt
U2402B
Absolute Maximum Ratings
Reference point Pin 2 (GND), unless otherwise specified
Parameters
Supply voltage
Pin 15
Voltage limitation
Current limitation
t < 100 ms
IS = 10 mA
Pin 15
Voltages at different pins
Pins 1, 3 and 11
Pins 4 to 10, 12 to 14 and 16 to 18
Currents at different pins
Pin 1
Pins 3 to 14 and 16 to 18
Power dissipation
Tamb = 60°C
Ambient temperature range
Junction temperature
Storage temperature range
Symbol
VS
IS
V
I
Ptot
Tamb
Tj
Tstg
Value
26
31
25
100
26
7
25
10
650
–10 to +85
125
–40 to +125
Unit
V
mA
V
mA
mW
°C
°C
°C
Thermal Resistance
Junction ambient
Parameters
Symbol
RthJA
Maximum
100
Unit
K/W
Electrical Characteristics
VS = 12 V, Tamb = 25°C, reference point Pin 2 (GND), unless otherwise specified.
Parameters
Test Conditions / Pins Symbol Min.
Power supply
Pin 15
Voltage range
Power-on threshold
Current consumption
Reference
ON
OFF
without load
Pin 14
VS
VS
IS
8
3.0
4.7
3.9
Reference voltage
Reference current
Temperature coefficient
IRef = 5 mA
IRef = 10 mA
VRef
– IRef
TC
6.19
6.14
Operational amplifier OP
Output voltage range
Output current range
Output pause current
Non-inverting input voltage
Non-inverting input current
I5 = 0
V5 = 3.25 V
Pin 5
Pin 5
Pin 5
Pin 6
Pin 6
V5
±I5
–Ipause
V6
±I6
0.15
80
100
0
Typ.
6.5
6.5
– 0.7
Max.
26
3.8
5.7
9.1
6.71
6.77
10
5.8
5
0.5
Unit
V
V
V
mA
V
V
mA
mV/K
V
mA
mA
V
mA
12 (17)
TELEFUNKEN Semiconductors
Rev. A3, 14-Nov-96

12 Page





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